Specifications

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LG31 Printer

Technical Manual

Order Number EK-LG31E-TM-002

Digital Equipment Corporation

Summary of content (203 pages)

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LG31 Printer Technical Manual Order Number EK-LG31E-TM-002 Digital Equipment Corporation
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1st Edition, November 1987 2nd Edition, June 1989 The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document. The software described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license.
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Contents Preface xiii Chapter 1 INTRODUCTION 1.1 1.2 1.3 1.4 1.5 1.6 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3 1.3.1 Control Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3 1.3.2 Electronics . . . . . . . . . . . . . . . . . . .
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1.6.4 1.6.5 Resident Fonts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–11 Resident Character Sets . . . . . . . . . . . . . . . . . . . . . . . . . 1–11 Chapter 2 THEORY OF OPERATION 2.1 2.2 2.3 2.4 2.5 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1 The Enclosure and Environment . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4 2.2.1 Interlock Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4 2.2.
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Chapter 3 CONTROLS AND INDICATORS 3.1 3.2 Inner Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1 Outer Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6 3.2.1 Forms Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6 3.2.2 Top Of Form (TOF) Set Procedure . . . . . . . . . . . . . . . . . . 3–8 Chapter 4 PRINTER AND HOST CONFIGURATION 4.1 4.2 4.3 Printer Parameters . . . . . . . . . . . . . . . . .
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5.5 5.6 5.7 5.8 5.4.3 Vibration Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASCII Print Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5.1 Starting the ASCII Print Test . . . . . . . . . . . . . . . . . . . . 5.5.2 Stopping the ASCII Print Test . . . . . . . . . . . . . . . . . . . . Testing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.6.1 Power Supply FRUs . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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6.20 6.21 6.22 6.23 6.24 6.25 6.26 Paper Tension Assembly . . . . . . . . . . . . . . . . . Paper Handling Assembly . . . . . . . . . . . . . . . . 6.21.1 Removing Upper Tractors . . . . . . . . . 6.21.2 Removing Lower Tractors . . . . . . . . . 6.21.3 Replacing Upper and Lower Tractors . Horizontal Vernier Timing Belt . . . . . . . . . . . . SHAD Board . . . . . . . . . . . . . . . . . . . . . . . . . . Power Supply Boards . . . . . . . . . . . . . . . . . . . . Logic Boards . . . . . . . . . . . . . . .
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Appendix B CONTROL CODE AND CONTROL SEQUENCE SUMMARY B.1 B.2 B.3 The 7-Bit Control Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–2 The 8-Bit Control Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3 The LG31 Escape and Control Sequences . . . . . . . . . . . . . . . . . . B–4 Appendix C LG31 PRINTED CIRCUIT BOARD SUMMARY C.1 C.2 C.3 C.4 C.5 C.6 C.7 C.8 C.9 C.10 C.11 C.12 C.13 SCPI—Shuttle Control Panel Interface . . . . . . . SHAD—Shuttle Head Actuator Driver .
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Figures 1–1 2–1 2–2 2–3 2–4 2–5 3–1 3–2 3–3 3–4 3–5 5–1 5–2 5–3 6–1 6–2 6–3 6–4 6–5 6–6 6–7 6–8 6–9 6–10 6–11 6–12 6–13 6–14 6–15 6–16 6–17 6–18 6–19 LG31 Front and Rear Views . . . . . . . . . . . . . . . . . . . . . . . Major Components of the LG31 Printer . . . . . . . . . . . . . . Major Components of the LG31 Printer . . . . . . . . . . . . . . Character Formation with One Actuator Pin . . . . . . . . . . Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . .
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6–20 6–21 6–22 6–23 6–24 6–25 6–26 7–1 7–2 7–3 7–4 7–5 7–6 7–7 C–1 C–2 C–3 C–4 C–5 C–6 C–7 C–8 C–9 C–10 C–11 C–12 D–1 D–2 D–3 D–4 D–5 D–6 Paper Handling Assembly (Part 1) . . . . . . . . . . . . . . . . . . 6–41 Paper Handling Assembly (Part 2) . . . . . . . . . . . . . . . . . . 6–42 Horizontal Vernier and Timing Belt . . . . . . . . . . . . . . . . . 6–47 SHAD Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–49 Power Supply Boards . . . . . . . . . . . . . . . . . . . . . . . .
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Tables 1–1 1–2 1–3 1–4 1–5 3–1 3–2 4–1 4–2 4–3 4–4 4–5 4–6 4–7 5–1 5–2 5–3 5–4 5–5 5–6 5–7 A–1 B–1 B–2 B–3 Standard Font Dot Pattern Chart . . . . . . . . . . . . . . . LG31 Printer Specification . . . . . . . . . . . . . . . . . . . . . Recommended Paper Weights . . . . . . . . . . . . . . . . . . Print Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Resident Fonts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mode Dependent Control Panel Features . . . . . . . . . .
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Preface Purpose This manual provides technical information on the LG31 300 LPM Line Matrix Printer. It contains information on the functions, diagnostics, adjustments, and part replacements required in servicing the printer. Manual Organization This manual is organized as follows: Chapter 1 Introduction Contains an overview, features, Field Replaceable Units (FRUs), and specifications of the LG31 printer. Chapter 2 Theory Of Operation Provides a functional and operational description of the LG31 printer.
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Chapter 5 Troubleshooting Contains a description of methods and procedures in maintaining and troubleshooting the LG31 printer. Describes the test diagnostics for power-on/test pattern, LED displays, remote-initiated self-test, and fault/font checksum code lists. Chapter 6 Removal and Replacement Procedures Consists of procedures that apply to removing and replacing LG31 printer Field Replaceable Units (FRUs). Chapter 7 Print Quality Adjustment Procedures Describes how to adjust print quality.
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Conventions In writing this manual, the following conventions have been adopted for the mechanical objects listed below: • Control Panel Pushbuttons = Capitalized pushbutton legend Example: ON LINE • LED 3-Character Display = Bracketed three characters including flashing printer mode dots Example: [.8.8.
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3. If required, report the problem to Digital Equipment Corporation Customer Service. Consult your service contract for the required information to process your call. FCC User Statement Notice This equipment generates, uses, and may emit radio frequency energy.
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Chapter 1 INTRODUCTION 1.1 Overview This chapter contains an overview of the LG31 300 LPM Line Matrix Printer (LG31 printer). It includes a brief description of the printer and a listing of the electrical, mechanical, and operational specifications. 1.2 General Description The LG31 300 LPM Line Matrix Printer (see Figure 1-1) is a serial I/O interface, high-speed, line matrix printer that is compatible with all lowend and mid-range PDP and VAX systems.
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Figure 1–1: LG31 Front and Rear Views DISPLAY WINDOW TOP ENCLOSURE OUTER CONTROL PANEL LEFT COVER FRONT DOOR PAPER RACK RIGHT COVER PAPER STACKING GUIDES POWER SWITCH (CIRCUIT BREAKER) REAR COVER PAPER SHELF RE_UK00220A_89 1–2 INTRODUCTION
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1.3 Major Components The major components of the LG31 printer are: • Control panels • Printer mechanism • Electronics 1.3.1 Control Panels The printer has two control panels: the outer control panel and the inner control panel. The outer control panel is on the outside of the top cover. It has keys for selecting normal operating functions and view window to the 3-digit display (seven segments each), which is a part of the inner control panel.
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1.3.3 Printer Mechanism The printer mechanism consists of the mechanical and electro-mechanical hardware in the printer. The printer mechanism performs ribbon and paper motion, and translates the binary print data to printed characters on paper through the print shuttle. 1.4 Features 1.4.1 U.S. ASCII 7-Bit and 8-Bit Codes When the host computer interface is set to 8-bit mode, the LG31 printer processes all eight bits of the received characters.
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1.4.5 Character Formation and Timing Character formation and timing is accomplished in two different modes: data processing (draft) font and near letter quality (correspondence) font. When data processing font is selected, dots are printed during each left-to-right movement of the shuttle. Individual print actuators are activated at each position where a dot is required, at a horizontal dot resolution of 60 dots/inch.
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Table 1–1: Standard Font Dot Pattern Chart Characters Per Inch Font (134 ASCII Characters) Dot Pattern 10 Standard Gothic Data Processing (default) 9H x 9V 10 NLQ 9H x 18V 12, 13.3, 15 Data Processing 7H x 9V 12, 13.3, 15 NLQ 7H x 18V 10 Italic 9H x 18V 12, 13.3, 15 Italic 7H x 18V 16.7 Gothic Data Processing Emphasized 5H x 9V 1.4.6 Ribbon Cartridge A cartridge type ribbon with re-inker is driven by the Ribbon Drive Motor, which is a dedicated data responsive motor.
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1.5 Printing Features Summary The following features can be selected both by the operator and by the host. - Bolding - Underlined text - Single, double-width characters - Single, double or triple-height characters - Autowrap - Line feed/new line mode - Hex dumping - Digital multinational 8-bit character set (U.S.
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1.6 Specifications 1.6.1 LG31 Printer Specification Table 1–2: LG31 Printer Specification Printer Dimensions Unpacked Width Depth (with Paper Tray) Height Net Weight Packaged Width Depth Height Weight Installation Area Requirements Width Depth Electrical Voltage Range 737.5 cm (29.0 in) 63.5 cm (25.0 in) 104.1 cm (41.0 in) 123 cm (48.4 in) 131 kg (287 lbs) 77.5 cm (30.5 in) 88.9 cm (35 in) 156.2 cm (61.5 in) 171 kg (376 lbs) (includes 16 kg (35.
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Table 1–2 (Cont.): LG31 Printer Specification Radio Frequency Interference Tested/certified to RFI standards FCC 15, Subpart J, Class A; VDE 0871 Class B Acoustic Noise LNPA 6.7 bels LPA 55 dBA Operating Altitude Temperature Relative humidity Non-operating Altitude Temperature Relative Humidity Printing Line Length Lines Per Inch (LPI) Spacing Characters Per Inch (CPI) 2.4 km (0 to 8,000 ft) 10°C to 40°C (50°F to 104°F) Maximum allowable reduced by factor 1.
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1.6.2 Recommended Paper Weights Table 1–3: Recommended Paper Weights Number of Parts Recommended Paper Weight Carbon Insert Sheet Weight 1 2, 3 or 4 5 or 6 56 g/m² (15 lbs) 50 g/m² (13.5 lbs) 45 g/m² (12 lbs) — 19 g/m² (8 lbs) 19 g/m² (8 lbs) 1.6.3 Print Speeds Print speeds are quoted in lines per minute (LPM) with the printer set at 6 LPI, for each available combination of font and horizontal pitch in characters per inch. Table 1–4: Print Speeds Horizontal Pitch (CPI) Font 5 10 12 13.3 15 16.
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1.6.4 Resident Fonts Table 1–5: Resident Fonts Horizontal Pitch (CPI) Font 5 10 12 13.3 15 16.7 Data Processing NLQ OCR-A OCR-B Yes Yes NLQ NLQ Yes Yes Yes Yes Yes Yes NLQ NLQ Yes Yes NLQ NLQ Yes Yes NLQ NLQ Yes Yes NLQ NLQ ‘‘Yes’’ indicates that the horizontal pitch is available in the current font. ‘‘NLQ’’ indicates that when either OCR-A or OCR-B font is selected, and a horizontal pitch other than 10 CPI is selected, the NLQ font is substituted automatically.
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Chapter 2 THEORY OF OPERATION 2.1 Overview This chapter gives a brief explanation of the operation of the major elements in the LG31 printer: 1. The Enclosure and Environment. This includes: • Interlock switches • Fans 2. The Print Mechanism.
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Figure 2–1: Major Components of the LG31 Printer TOP COVER INTERLOCK SWITCH SCPI TOP ENCLOSURE RIBBON ASSEMBLY INNER CONTROL PANEL TRACTORS (PAPER DRIVE MECHANISM) SHUTTLE DRIVE ASSEMBLY FRONT FAN RIGHT COVER LEFT COVER PAPER LOW SWITCH PAPER SUPPLY CONTROL LOGIC MODULES SMIH SMIM SMSM SMMC DOOR RE_UK00221A_89 2–2 THEORY OF OPERATION
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Figure 2–2: Major Components of the LG31 Printer SWITCH BOX REAR FAN POWER MODULES SPSM SPSR LINE FILTERS RE_UK00246A_89 THEORY OF OPERATION 2–3
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3. The Electronics. The electronics include: • Four main control logic PCBs in the logic module • Three additional printer control PCBs • Connector circuitry 4. The Power Supply. The power supply includes: • Two main PCBs located in the power module • Two additional power supply PCBs • A switch box • Miscellaneous components The location of the major components can be seen in Figures 2–1 and 2–2. 2.
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The operator can cause printing to continue by pressing TEST CLR momentarily. [L P P] then replaces [L o P] in the display, and the printing process continues until ‘‘end of paper’’ is reached. At this point [L P P] is replaced by [ P o] and printing ceases. 4. Shuttle Access Door Interlock Switch The function of the shuttle access interlock switch is to discharge the 85V and 42V bus voltages via the SPSD board as described in Section Section 2.5.
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At the end of the travel of the shuttle motor, the paper is advanced by 1/72-inch (approximately one dot diameter), and the next row is printed in the reverse direction. In NLQ printing the paper is not advanced until the actuators have travelled back across the same line reprinting the same dots. To build up a character the dots must be precisely located. This is achieved by developing a position signal derived from a Linear Velocity Transducer (LVT) attached to the actuator assembly.
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2.3.2 The Paper Drive Assembly Two sets of synchronized six-pin tractors (upper and lower) control paper motion. The motor driving the tractors is driven by drivers and logic on the SMMC board. 2.3.3 The Ribbon Assembly The ribbon is housed in a plastic cartridge and is pulled between the print actuator modules and the paper by a data-responsive motor. The ribbon is about 60 meters (65 yards) long, 25 mm (1 inch) wide, and can be re-inked once only (see the LG31 Installation/Operator’s Manual).
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4. Shuttle Matrix Imaging Microprocessor (SMIM) 5. Shuttle Matrix Image Hardware (SMIH) 6. Shuttle Matrix Shuttle Head Actuator Driver (SHAD) 7.
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2.4.2 Shuttle Control Panel Interface (SCPI) The SCPI is secured to the top cover. It provides the electrical connection between the external and internal control panels. There are no active components on this board. 2.4.3 Shuttle Matrix Display Panel (SMDP) The SMDP board is secured beneath the inner control panel, which is mounted on top of the shroud.
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2.4.3.3 Printer Initialization Switch This slide switch is used in one of the two initialization procedures which is described in the section on ‘‘Initializing a Locked-up Printer’’. 2.4.3.4 Inner Control Panel In on-line and off-line, these switches perform the functions printed on them. More functions are available by operating the PRG and FCT switches while in the off-line state. The PRG switch enters the programming mode.
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SMSM receives fault information from the SMIM. When a fault condition is sensed, the system microprocessor informs the host CPU of this fault by way of the RS-232 interface. 2.4.5 Shuttle Matrix Imaging Microprocessor (SMIM) The SMIM is located in the card cage on the right side of the printer. It sends commands to the SMIH board for dot imaging. That is, it builds the dot rows for font characters or graphic displays. The SMIM board also controls the ribbon and shuttle motors and paper movement.
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2.4.8 Shuttle Matrix Motor Control (SMMC) The SMMC is located in the card cage on the right side of the printer. It provides circuits necessary to operate the ribbon weld detector, and to run three motors in the printer; the shuttle motor, the paper motor, and the ribbon motor. This board also controls the fans. The rear fan is switched to high during printing and low when not printing. The front fan is switched ON when printing and OFF when not printing.
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INPUT A.C. EMI FILTER RECT SPSX SWITCH BOX VZ PV 12 VIZ SPSR +12V REG 12 VZ CR25 OV OV CR48 +85V CR10 CR26 SURGE CAPACITORS +5.1V REG HOLD UP CAPACITORS OSC CNT DOWN PWR STAGES +12V -12V REG CR27 OV +85V +42V REG SPSD CR28 OV TO LOGIC BOARDS RE_UK00254M_89 } +42V -12V +5.
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2.5.1 Description The power supply provides the following voltages: 5.10V @ 6A 12V @ 1A -12V @ 1A 42V @ 12A 85V @ 4A The major components of the power supply are: The Power Supply Filter (SPSX) The Power Supply Master (SPSM) The Power Supply Regulator (SPSR) The Power Supply Discharge (SPSD) There are also two chassis mounted capacitors distributed in the printer. 2.5.2 Shuttle Power Supply Filter (SPSX) The SPSX board is located in the ac switch box at the rear of the printer near the power ON/OFF switch.
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2.5.4 Shuttle Power Supply Regulator (SPSR) The SPSR board is located in the power module on the left side of the printer. It provides the four regulated dc voltages needed by the printer: 5.10 V, 12 V, -12 V, and 42 V. Visual LED indicators on the board are used to indicate the presence of the voltages. The SPSR board provides crowbar protection for the 5.10 V circuit. A current limiting circuit is provided to protect the power switching transistor.
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Chapter 3 CONTROLS AND INDICATORS There are two control panels: the Inner Control Panel and the Outer Control Panel. 3.1 Inner Control Panel The inner control panel, which is located inside the top cover contains the keys that control all operational functions of the LG31. These include: • Performing the same functions as the outer control panel. • Modifying print parameters. • Modifying serial interface parameters. • Performing diagnostics. The inner control panel has three modes of operation: 1.
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3. FUNCTION This mode is selected by pressing the (9) FCT key. In FUNCTION (FCT) mode the 10 keys are assigned new functions. See Figure 3–3. Table 3–1 outlines the features of the printer which are available for setting up in different modes of the control panel. Table 3–1: Mode Dependent Control Panel Features MODE SETTING NORMAL FUNCTION PROG.
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Figure 3–1: The Inner Control Panel showing Display, Audio Alarm, Initialization Switch INITIALIZATION SWITCH AUDIO ALARM DISPLAY . FCT MODE . FORM LOADED .
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FONT 0. Exit 1. Style 2. CPI 3. Country 4. Mode 5. Horizontal Expansion 6. Vertical Expansion Style (as applicable) 0. Exit 1. 44AXXXXXX-DATA PROCESSING 2. CORRESPONDENCE 3. 44AXXXXXX-OCR-A 4. 44AXXXXXX-OCR-B CPI 0. Exit 1. 5 CPI 2. 10 CPI 3. 12 CPI 4. 13.3 CPI 5. 15 CPI 6. 16.7 Country 0. EXIT 1. US ASCII 2. Great Britain 3. DEC Dutch 4. DEC Finland 5. French 6. DEC French (Canada) 7. Germany 8. Italy 9. Continue Country 0. Exit 1. US ASCII 2. DEC Norway/Denmark 3. Spain 4. DEC Sweden 5. DEC Swiss 6.
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9 ENTER FUNCTION MODE PRINTER INITIALIZATION PRG 0 FCT FEED FORM NO CHANGE RETURN TO OFF LINE TEST CLR ON LINE 2 3 0 RESET TO USERS MENU PARAMETERS 9 INITIALIZE TO FACTORY DEFAULT CONDITIONS ON LINE 3 FORMS SETUP PRG 2 8 EXIT OFF LINE FEED TO TOP TEST CLR 1 FORM FEED FEED FORM FORWARD LINE FEED ON LINE REVERSE LINE FEED SET TOP FCT 1/72" FORWARD 9 0 TEST CLR PRG 2 FEED FORM 4 LINE FEED ON LINE CPI LPI 1/72" REVERSE 6 PAPER REV 4 LINE CONTROLS AND INDICATORS 3–5 SET
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3.2 Outer Control Panel The Outer Control Panel keys only perform the functions indicated by their respective legends. See Figure 3–4. Figure 3–4: Outer Control Panel FORM LOADED READY TEST CLR FORM FEED ON LINE OUTER CONTROL PANEL RE_UK00710M_89 3.2.1 Forms Setup The following sections show how the inner control buttons change the position of the form. (The form is the area where printing occurs. It is not where the perforations in the paper occur.
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Table 3–2: Forms Setup Procedure Action Results Display Press (3) ON LINE Press (9) FCT Press (2) FORM FEED Printer goes to OFF LINE. [ O F L] Printer enters Mode Selection state. Printer enters Form Setup mode. [.F n c] Exits from Form Setup to OFF LINE, and feeds to top of next form in accordance with current length. Form feeds one form length. Forward line feed in accordance with current LPI setting.
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Table 3–2 (Cont.): Forms Setup Procedure Action Results Display (6) PAPER REV (7) FONT Sets bottom margin. Sets bottom of form and returns to OFF LINE. [0 6 2] [O F L] Prior to pressing key (4) LINE FEED, press any paper motion key to advance paper as appropriate, and the display will not change. After pressing set key (4) LINE FEED, the display will change to a counter that will count the line feeds forward as key (2) FORM FEED is pressed or backwards, as key (3) ON LINE is pressed.
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5. The body of the form is 21.6 cm (8½ inches) or 51 lines. Press and hold key (2) FORM FEED, count 51 lines (51 + 6 = 57 total), release pushbutton. Display counts to [.0 5 7] and stops. 6. Press key (6) PAPER REV to set bottom margin. Display remains at [.0 5 7]. 7. Form is 27.9 cm (11 in) or 66 lines. Press and hold key (2) FORM FEED, count nine lines, release pushbutton. Display is [.0 6 6]. 8.
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Figure 3–5: Key (4) Form Size Setup Example Top of Form 000 Top Margin 1 in 006 Sample Form 812 in Bottom Margin 057 1 12 in 066 End of Form RE_UK00282M_89 3–10 CONTROLS AND INDICATORS
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Chapter 4 PRINTER AND HOST CONFIGURATION 4.1 Printer Parameters 4.1.1 Factory Parameter Settings The factory settings for the printer are listed in Table 4–1. Table 4–1: Factory Settings Selectable Parameter Factory Set Condition Print Status Horizontal Pitch Vertical Pitch Font Form Length Active Position Top Margin Bottom Margin Left Margin Right Margin Underlining Bolding Italics Character Expansion GL Character Set GR Character Set G0 Character Set Off-Line 10 characters per 2.
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Table 4–1 (Cont.): Factory Settings Selectable Parameter Factory Set Condition G1 Character Set G2 Character Set G3 Character Set Autowrap Line Feed/New Line Mode Horizontal Tabs Unsolicited Reports Super/Subscripts Carriage Return New Line Mode Vertical Tabs Number of data bits Number of stop bits Baud rate Parity VT100 Graphic Character Set Digital Supplemental U.S. ASCII Autowrap Enabled Set At every 8 columns (9, 17..137) Disabled Disabled Reset Every line (1, 2, ...
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4.1.3 Power-Up Parameters Retained Upon power-up of the LG31 printer, the parameters that will be retained from the previous power-on session are listed in Table 4–3.
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Table 4–4 (Cont.
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4.2 Control Strap Configuration There are two groups of strapping options in the printer, interface and printer control. Both are accessed and modified in the same manner using the configuration menu. Table 4–5 and Table 4–6 describe the strap functions briefly. For detailed description see the LG31 User’s Guide.
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Table 4–6: Interface Control Strap Descriptions Strap Number Action A1-A3 A4 0 (OUT) A5 A6 A7 A8 A9-A11 A12 1 0 0 0 (IN) (OUT) (OUT) (OUT) A13 0 (IN) A14 A15 A16 A17-A19 A20 0 (OUT) 0 (OUT) 0 (OUT) A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 B1 B2 B3 B4 B5 1 0 1 0 (IN) (OUT) (IN) (OUT) 0 0 0 1 0 0 0 (OUT) (OUT) (OUT) (IN) (OUT) (OUT) (OUT) 1 0 0 0 (IN) (OUT) (OUT) (OUT) B6 B7-B32 1 (IN) 0 (OUT) 0 (OUT) Function and Description Not Assigned Ready/Busy by SCA pins 11 & 19 disabled Re
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4.3 Host to LG31 Printer Set-up Procedure 4.3.1 Interface Control Strap Settings Figure 3-14 of the LG31 Printer User’s Guide states that parity is disabled at interface strap B2. This is the factory setting and the recommended setting. This means that the serial interface must be setup with no parity. 4.3.2 Serial Interface Settings for VAX/VMS Before using the printer, the serial interface must be set-up correctly. The system manager must issue the following commands for the VAX/VMS operating system. 1.
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Terminal Characteristics Interactive No Hostsync Wrap No Broadcast No Modem No Brdcstmbx Line Editing No Secure server No SIXEL Graphics No ANSI_CRT No Edit_mode Echo TTsync Scope No Readsync No Local_echo No DMA Overstrike editing No Disconnect Type_ahead Lowercase No Remote Form No Autobaud No Altypeahd No Fallback No Escape Tab Eightbit Fulldup No Hangup Set_speed No Dialup Pasthru No Syspassword No Soft Characters No Regis No DEC_CRT No Printer Port Numeric Keypad No Block_mode No DEC_CRT2 No
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4.3.
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4.3.4 RSX Settings The terminal characteristic PASTHRU should be set. 4.3.5 RT-11 Settings A command of the form ASSIGN TT1: LP: should be issued. This assumes a multiterminal system. Refer to the RT-11 System User’s Guide. 4.3.6 RSTS/E Settings Refer to the RSTS/E System Manuals.
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Chapter 5 TROUBLESHOOTING 5.1 Introduction This chapter contains troubleshooting information for the LG31 printer. Troubleshooting the printer can involve the following: • Diagnostic self-tests (see Section 5.2) • Printer initialization (see Section 5.3) • Mechanical fault finding (see Section 5.4) • ASCII Print Test (see Section 5.5) • Power supply troubleshooting (see Section 5.
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— What is the quality of the printed page? If the printing is erratic or skewed, check for a mechanical failure (Section 5.4). If it is poor quality, perform the print-quality adjustment procedure in Chapter 5. • Check for audible indications: — Did the audio alarm sound? Power down and then power up the printer to see if the problem repeats (see Figure 5–1).
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Figure 5–1: Troubleshooting Tree Operating problem Power off Remove serial interface cable Power on Is there a control panel LED display N (1) (2) Are all the LEDs on the power supply modules on Y SELF TEST pass N (4) (3) Y Y Power supply troubleshooting procedure Control panel troubleshooting procedudure (5) Run ASCII print test (6) Y Print quality good N N Print & mechanical troubleshooting procedure Printer initialization procedure Error code troubleshooting procedure (8) Check
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Figure 5–1 is a troubleshooting flowchart that follows a logical sequence to isolate a basic printer fault. The following notes refer to the marked steps in the flowchart. 1. Communications problems are not dealt with by this flowchart and can be investigated by: a. Verifying the host and printer setup parameters (see the LG31 Printer Installation and Operator’s Guide). The LG31 hex-dump facility can be of considerable use in the investigation of certain communication and setup problems. b.
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Table 5–1: Problems and Possible Causes Problem Possible Cause Inner Control Panel Malfunction 1. 2. 3. 4. Outer Control Panel Malfunction (Inner Control Panel OK) 1. Outer control panel 2. Cable assembly 25 connections at SCPI-P3 and SMDP-P3 Intermittent/erratic operation 1. If SPSR voltage LEDs vary in brilliance: a. SPSR b. SPSM c. SPSX 2. Interface cable/connector 3. Cable assembly 16 4. SMSM (check CR4 LED (ALE signal); indicates microprocessor operating) 5.
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Table 5–1 (Cont.): Problems and Possible Causes Problem Possible Cause Shuttle malfunction 1. 2. 3. 4. 5. Missing dots, light printing over portion printing area 1. Print actuator module (replace) 2. SHAD 3. SHAD to print module cable assembly 19 Printing too light or heavy, lighter at one end, poor quality 1. Print module - striker bar gap adjustment Ribbon will not advance 1. 2. 3. 4. 5. Fan control malfunction or fans inoperative 1. Fan 2. SMMC 3.
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1. The first thing displayed after the printer is turned on or at the conclusion of an ASCII print test, is [.8.8.8] accompanied by audio alarm sounds for approximately two seconds. The [.8.8.8] display allows verification that the display LEDs (three decimal points and 21 segments that form the [.8.8.8] display) are all functioning. 2. The printer then displays [ i P ] for several seconds, indicating that the printer self-test is in progress. The display then changes back to [.8.8.8] for several seconds.
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Table 5–2: Diagnostic Self-Test Sequence Test No. Error Code FRU Tested Test No.
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Table 5–3: Error Codes Error Code FRU Tested R&R Proc. Ac1-Ac3 PAM SHAD 6.6 6.20 Print Actuator Module Test (Ac1=left module, Ac2=center module, Ac3=right module) CO -- -- Cover open F_ _ SMIM 6.2 Font Checksum Error (see Table 3-4 for the fonts indicated by the error code) inF SMSI 6.22 Operational Interface Detection Test i13 SMIM 6.22 8253 Timer Test (U13) i14 SMIM 6.22 8259 Interrupt Controller Test (U14) i20-i22† SMIM 6.22 Program ROM Test (U20-U22) i25-i32† SMIM 6.
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Table 5–3 (Cont.): Error Codes Error Code FRU Tested R&R Proc. 022 SMSM 6.22 Insufficient RAM installed on SMSM board 050 SMSM 6.22 Switchable Memory Test (U9-U13, U18-U25, U32-U35, U42) 055 SMSM 6.22 Switchable Memory Test (U11 and U21) 060 SMSM 6.22 8085 Interrupt Controller Test (U3) 080 SMSM 6.22 DMA Address Counter Test (U37, U38, U42, U43, U50-U54) 100 —- —- EVFU Fault 101 —- —- EVFU Fault 102 —- —- EVFU Fault 103 —- —- EVFU Fault —- —- EVFU Fault SMIM 6.
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Table 5–3 (Cont.): Error Codes Error Code FRU Tested R&R Proc. Failure (Test/Component) 492 SMIH 6.22 Dot Buffer and Imaging Circuit Test 493 SMIH 6.22 STOP3 Signal Test 494 SMIH 6.22 Paper Motion Interrupt Signal Test 529 SMSM 6.22 Non-Volatile RAM/RAM Stack Test (U29) 530 SMSM 6.22 8253 Timer Test (U30) 531 SMSM 6.22 8259 Interrupt Controller Test (U31) 544 SMSM 6.22 8K RAM Test (U44) 547-549† SMSM 6.22 ROM CRC Test (U47-U49) 700 SMIM 6.
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5.3 Printer Initialization Initializing the printer changes all the configuration parameters back to the factory settings. There are two means of initializing the printer: using the control panel keys, or using the initialization switch if the printer is locked up. NOTE Prior to initializing the printer, print a copy of the printer’s current configuration status report (see the LG31 Printer User’s Guide or the LG31 Printer Installation/Operator’s Manual ) to keep for future reconfiguration. 5.3.
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4. When the printer displays [ . S U], press (a)FCT. 5. When the printer displays [ . S U], move the INIT switch to the left (its normal position) to finish the initialization. NOTE If the printer initialization switch is not returned to its original position, the printer will display [ . S U] each time the printer is powered-up or when the ASCII print test is run. The operator may then complete the initialization by performing step 4, above.
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5.4.1 Paper Feed Mechanical Faults If the noise or binding exists during paper feeding, the fault may be one or more of the following. Fault Corrective Action Insufficient clearance print module and striker bar. 1. Readjust Print Gap adjustment dial (see the LG31 Printer Installation/Operator’s Manual). 2. See Print Quality Adjustment Procedures (Chapter 7). Incorrect paper tension. 1. Readjust Paper Tension adjustment lever (see the LG31 Printer Installation/Operator’s Manual).
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5.4.2 Printing Mechanism Mechanical Faults If excessive noise or binding exists during printing, the fault may be isolated to one or more of the following. Fault Corrective Action Linear Velocity Transducer (LVT) misadjusted. 1. Adjust the Linear Velocity Transducer (LVT) Coil and Magnet (Section 6.14). Shuttle Motor defective or unbalanced. 1. See Print Quality Adjustment Procedures (Chapter 7). Ribbon Cartridge defective or not installed correctly. 1.
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5.5 ASCII Print Test The ASCII print test pattern is an operator-initiated test verifying print quality and mechanical operation of the paper tension and paper gap adjustments. 5.5.1 Starting the ASCII Print Test To start the ASCII printing test pattern, press the (0) TEST CLR key for more than 0.5 seconds. A rolling pattern (Figure 5–2) of all the printable ASCII characters in current font style, pitch, expansion, margins, and Lines Per Inch (LPI) setting is printed.
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DANGER HAUTE TENSION EMMAGASINEE Attendre 5 minutes après avoir enlevé la source de courant alternatif et avant de demonter la machine. Voir le manuel pour les instructions d’entretien. PELIGRO ALTO VOLTAJE ALMACENADO Antes de proceder a desensamblar esto, esperar 5 minutos despues de haber removido la fuente de C.A. para instrucciones de servicio de mantenimiento, vease el manual.
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Figure 5–3: Power Supply FRUs SURGE CAPACITOR POWER MODULES HOLD UP CAPACITOR SPSR DC POWER DISTRIBUTION CABLE SPSM SPSD AC POWER SOCKET LINE FILTER AC SWITCH BOX P2 P1 P3 SPSX RECTIFIER ON/OFF SWITCH/ CIRCUIT BREAKER RE_UK00222A_89 5–18 TROUBLESHOOTING
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• SURGE Capacitor — Located at upper left corner of the enclosure — 40,000 µF at 50 Vdc • SPSD Board — Located inside rear access panel below the capacitor — Shuttle power supply discharge 5.6.2 Finding and Correcting a Power Supply Problem If you suspect a problem in the power supply, perform the following steps. 1. Turn the printer power off. 2. Remove the cover from the power supply card cage on the left side of the printer (see Figure 6–24). 3. Turn the printer power on. 4.
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• If LED CR48 on SPSM is still not lit, check cable assembly 6 and the bridge rectifier. NOTE The voltage (12 V z ) indicated by CR10 is 12 V above the rectified output zero (z) and is not 12 V above ground. • If LED CR48 (top) on SPSM is not lit, replace SPSM. 5. Check the SPSR output voltages by disconnecting P3 of CA8, and measuring the voltages at the connector. The voltages are: PWR-UP P3-6 -12V P3-3 12V P3-10 5.1V P3-8 42V P3-1, P3-12 0V P3-2, P3-5, P3-7, P3-9, P3-11 5.
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Table 5–5: Printed Circuit Boards (PCB) FRUs Board Meaning Part No. Location SCPI Shuttle Control Panel Interface 29-26721-00 On access door between outer and inner control panels. SHAD Shuttle Head Actuator Driver 29-26729-00 Vertically mounted in top rear of printer. SMDP Shuttle Matrix Display Panel 29-26720-00 On inner control panel. SMMB Shuttle Matrix Mother Board 29-27261-01 Inside rear access door.
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Table 5–6: Non-PCB FRUs Item Part Number Description 1 29-26707 Timing Belt 2 29-26708 Shuttle/Shroud Interlock Switch 3 29-26709 Circuit Breaker ON/OFF Switch 4 29-26710 Paper Out Limit Switch 5 29-26711 Cover Interlock Switch 6 29-26712 Striker Bar Switch Assembly 7 29-26714 Brushless Fan, Front and Rear 8 29-26715 Shuttle Motor Assembly Kit 9 29-26716 Tractor, Lower Left 10 29-26717 Tractor, Lower Right 11 29-26718 Tractor, Upper Left 12 29-26719 Tractor, Upper Right
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Table 5–6 (Cont.): Non-PCB FRUs Item Part Number Description 26 17-00209-00 Power Cord - U.K.
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5.8 Internal Wiring Numbers Table 5–7: Cable Part Numbers Cable Vendor Assy. From To Part Number CA1 AC Power Source Printer Power Connector U.S.
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Table 5–7 (Cont.): Cable Part Numbers Cable Vendor Assy. From To Part Number CA22 SPSA Sig. Gnd. Frame Ground 44A505271-G22 CA25 SMDP-P3 SCPI-P3 44A505271-G20 CA27 Line Filter Ground 44A505271-G02 CA28 Line Filter Power Receptacle 44A505271-G01 CA30 SPSR-P1 85V Cap.
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Chapter 6 REMOVAL AND REPLACEMENT PROCEDURES 6.1 Overview This chapter provides removal and replacement procedures for the LG31 Field Replaceable Units (FRUs). NOTE Care should be taken when removing and replacing PCBs. All boards are slot dependent but are not keyed to prevent insertion into the wrong slot. The part description is marked both on the boards and on their respective slots. DANGER STORED HIGH VOLTAGE Wait five minutes after removing ac source before disassembling.
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ACHTUNG, GEFAHR HOCHSPANNUNG WIRD GESPEICHERT Nach Abschalten der Wechselstromquelle, fünf Minuten warten, bevor Teile demontiert werden. Bitte Bedienungsvorschrift im Handbuch nachsehen. 6.2 Required Tools The tools required to perform the LG31 removal and replacement procedures are: — Medium screwdriver (regular shank). — Medium screwdriver (long shank). — One pair of wire cutters. — One metric socket set. — A nylon gauge (DEC P/N 29-26861-00). — Shim (DEC P/N 29-26862-00).
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Figure 6–1: Power Switch and External Connectors POWER SWITCH (CIRCUIT BREAKER) POWER CABLE INTERFACE CABLE RE_UK00247A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–3
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6.4 Paper Handling Hardware The following procedure describes how to remove the paper handling hardware. Do the reverse of this procedure to reinstall the paper handling hardware (see Figure 6–2). 1. Disconnect the slide-on terminal ends of the ground cable from both sides of the paper shelf. Remove the cable and the paper shelf. 2. Disconnect the two ground cables from the paper rack by disconnecting the alligator clips on each cable from the rack. Remove the paper rack.
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Figure 6–2: Paper Handling Hardware GROUND CABLE PAPER RACK PAPER STACKING GUIDES PAPER SHELF RE_UK00248A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–5
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6.5 Installing Shipping Hardware The following procedure describes how to install the LG31 shipping hardware. 1. Open the top cover. 2. Remove the ribbon cartridge. 3. Open the shroud cover. 4. Use an 8 mm socket wrench to install the hex head bolts, washers, and shipping bracket that are used as horizontal restraints during shipping (see Figure 6–3). 5. Use an 8 mm socket wrench to install the two red hex head bolts that secure the striker bar support blocks (see Figure 6–3).
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7. Install the two red shipping blocks (see Figure 6–4) by reaching behind the paper handling assembly. Install the blocks through the printer front enclosure door. Figure 6–4: Shipping Blocks SCREWS, LOCKWASHERS, PLAIN WASHERS SECURE TO FRONT PAIR OF SHUTTLE SHIPPING BLOCKS RE_UK00307A_89 8. Use an 8 mm socket wrench to install the two hex head cap bolts and washers holding the shuttle shipping blocks in place (see Figure 6–5). These bolts are located inside and under the printer. 9.
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Figure 6–5: Shipping Block Attachment Hardware RED SHUTTLE SHIPPING BLOCKS (REAR PAIR) RED SHUTTLE SHIPPING BLOCKS (FRONT PAIR) RE_UK00308A_89 6.6 Front Door and Rear Access Panels Use the following procedure to remove the front door and rear access panels (see Figure 6–6). Do the reverse of this procedure to reinstall the front and rear access panel. 1. Open the the front door panel. 2. Use a medium screwdriver to lift the catch on the upper hinge pin. 3.
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Figure 6–6: Front Door and Rear Access Panel HINGE PIN CATCH HINGE RELEASE MECHANISM FRONT DOOR LEFT PANEL FRONT DOOR CAPTIVE SCREWS RE_UK00223A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–9
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6.7 Top Cover Use the following procedure to remove the top cover (see Figure 6–7). Do the reverse of this procedure to reinstall the top enclosure. 1. Remove the paper rack. Perform steps 1 and 3 of Section 6.4. 2. Open the cover, and disconnect the ground straps from the printer frame. 3. Use a narrow blade screwdriver to loosen the screw that secures the inner control panel cable access door. Carefully open the cable access door. 4.
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Figure 6–7: Top Cover COVER DOOR TOP ENCLOSURE GROUND STRAP CA25 CABLE ASSEMBLY PAPER GAP ADJUSTER CA25 CLAMP TOP ENCLOSURE CARTRIDGE HOLDDOWN CA25 CONNECTOR 2x TOP ENCLOSURE RETAINING SCREWS (2x SCREWS SAME LOCATION AT REAR) RE_UK00224A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–11
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6.8 Print Actuator Modules Use the following procedure to remove the print actuator modules (see Figure 6–8). Do the reverse of this procedure to reinstall the printer actuator modules. NOTE Print actuator modules must be removed in sequence from left to right. When installing the actuator modules, they must be installed in reverse sequence, from right to left. 1. Open the top cover. 2. Set the paper gap adjuster to the LOAD position. 3. Release the ribbon cartridge hold down. 4.
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Figure 6–8: Printer Actuator Module PRINTER ACTUATOR MODULES PAPER GAP ADJUSTER PRINTER ACTUATOR MODULE CABLES PRINTER ACTUATOR MODULE RETAINING SCREWS SHUTTLE ACCESS DOOR RE_UK00225A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–13
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6.9 Inner Control Panel Use the following procedure to remove the inner control panel (see Figure 6–9). Do the reverse of this procedure to reinstall the inner control panel. 1. Remove the top enclosure (see Section 6.7). 2. Disconnect cable CA15 located at the lower edge of the control panel. 3. Disconnect the inner control panel ground strap connected to the spade connector. The spade connector is located on the right side of the control panel. 4.
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Figure 6–9: Inner Control Panel GROUND STRAP CA25 RIBBON CABLE CLAMP RETAINING SCREW CABLE ACCESS DOOR P3 CA25 P4 CA15 RIBBON CABLE CONNECTORS INNER CONTROL PANEL CA15 CABLE RE_UK00226A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–15
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6.10 Shroud and Ribbon Drive Assembly Use the following procedure to remove the shroud and ribbon drive assembly (see Figure 6–10). Do the reverse of this procedure to reinstall the shroud and ribbon drive assembly. 1. Remove the top enclosure (see Section 6.7). 2. Perform steps 2, 3, and 4 of Section 6.8 3. Disconnect both connectors at the inner control panel (see Section 6.9). 4. Disconnect cable CA25 at connector P2, located behind the inner control panel, and to the right of the paper feed motor. 5.
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Figure 6–10: Shroud and Ribbon Drive Assembly GROUND WIRES INNER CONTROL PANEL CA15 RIBBON CABLE METAL GUARD VIEW ON ARROW ’A’ A CA25-P3 SHUTTLE ACCESS DOOR CA17-P6 CA15-P4 RE_UK00227A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–17
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6.11 Ribbon Drive Motor Use the following procedure to remove the ribbon drive motor (see Figure 6–11). Do the reverse of this procedure to reinstall the ribbon drive motor. 1. Open the top cover. 2. Remove the ribbon cartridge (steps 2, 3, and 4 of Section 6.9). 3. Open the hinged cover on the shroud and ribbon drive assembly. 4. Disconnect the motor cable connector CA17-P6 (see Figure 6–10). 5. Use a 7 mm wrench to remove the three self-locking nuts and washers. 6.
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Figure 6–11: Ribbon Drive Motor SHUTTLE ACCESS DOOR RIBBON DRIVE MOTOR TORQUE M4x16 PAN HD SCREW TO 0.22 Nm (4 PLACES) M4 LOCKWASHER (4 PLACES) M4 LOCKWASHER (3 PLACES) ISOLATION PLATE M4 EXT. LOCKWASHERS E2 TORQUE M4 SELF-LOCKING TO 1.7 Nm (3 PLACES) M4 SELF-LOCKING NUT TORQUE TO 1.
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6.12 Ribbon Weld Sensor Use the following procedure to remove the ribbon weld sensor (Figure 6–12). Do the reverse of this procedure in reverse order to reinstall the ribbon weld sensor. DANGER STORED HIGH VOLTAGE Wait five minutes after removing ac source before disassembling. Refer to manual for service instructions. DANGER HAUTE TENSION EMMAGASINEE Attendre 5 minutes après avoir enlevé la source de courant alternatif et avant de demonter la machine. Voir le manuel pour les instructions d’entretien.
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Figure 6–12: Ribbon Weld Sensor FOUR WIRE TIES RIBBON WELD SENSOR SECURING SCREW RIBBON WELD SENSOR P11 SHUTTLE ACCESS DOOR RE_UK00229A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–21
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6.13 Smudge Shield Use the following procedure to remove the smudge shield (see Figure 6–13). Do the reverse of this procedure to reinstall the smudge shield. 1. Open the top cover. 2. Remove all print actuator modules (see Section 6.8). 3. Use a medium-size screwdriver to remove three pan head screws and lock washers that secure the smudge shield to the shuttle bar. 4. Remove the smudge shield from the printer.
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Figure 6–13: Smudge Shield SMUDGE SHIELD SECURING SCREW STRIKER BAR SECTION THROUGH SHUTTLE BAR WITH PRINT ACTUATOR MODULES REMOVED.
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6.14 Linear Velocity Transducer (LVT) Coil and Magnet Use the following procedure to remove and replace the LVT coil and magnet (Figure 6–14). 6.14.1 Removing the LVT Coil and Magnet 1. Remove the top enclosure (see Section 6.7). 2. Remove all print actuator modules (see Section 6.8). 3. Remove the shroud and ribbon drive assembly (see Section 6.10). 4. Disconnect the LVT at connector CA17-P7, located between the drive mechanism and the left side panel. 5.
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Figure 6–14: LVT Coil and Magnet Assembly LVT COIL ASSEMBLY LVT BOBBIN LVT MAGNET SUPPORT TUBE AFTER ASSEMBLY, LVT MAGNET ASSEMBLY MUST HAVE VISIBLE CLEARANCE BETWEEN IT AND THE ADJACENT HOLE MAGNET 7.84+0.25 MAGNET (CAUTION MEASUREMENT MUST BE TO THE MAGNET SUPPORT TUBE, NOT TO THE EPOXY IN THE END OF TUBE.
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6.15 Actuator Ribbon Cables Use the following procedure to remove the actuator ribbon cables (see Figure 6–15). Do the reverse of this procedure to reinstall the actuator ribbon cables. 1. Remove the top enclosure (see Section 6.7). 2. Remove the shroud and ribbon drive assembly (see Section 6.10). 3. Disconnect all cables from the print actuator modules (see Section 6.8). 4. Use a medium-size screwdriver to loosen the four screws that secure the SHAD board enclosure cover and remove the cover. 5.
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Figure 6–15: Actuator Ribbon Cables SHAD BOARD SHAD ENCLOSURE CA14 42V CAPACITOR LEADS ACTUATOR CABLES CA19 SHAD ENCLOSURE COVER SHAD ENCLOSURE PRINT ACTUATOR MODULES A ACTUATOR CABLES CABLE CLAMP PRESS DOWN INSERT SCREWDRIVER AND TURN VIEW ON ARROW ’A’ PULL OUT RE_UK00232A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–27
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6.16 Line Filter Assembly Use the following procedure to remove the line filter assembly (see Figure 6–16). Reverse this procedure to reinstall. DANGER STORED HIGH VOLTAGE Wait five minutes after removing ac source before disassembling. Refer to manual for service instructions. DANGER HAUTE TENSION EMMAGASINEE Attendre 5 minutes après avoir enlevé la source de courant alternatif et avant de demonter la machine. Voir le manuel pour les instructions d’entretien.
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Figure 6–16: Line Filter Assembly LINE FILTER LINE FILTER AC POWER CABLE CA1 BROWN CA28 BROWN FILTER POWER INLET PLUG GREEN/YELLOW CA2 LINE LOAD BLUE BLUE CA28 RE_UK00233A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–29
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6.17 AC Switch Box Use the following procedure to remove the ac switch box assembly (see Figure 6–17). Do the reverse of this procedure to reinstall the ac switch box assembly. DANGER STORED HIGH VOLTAGE Wait five minutes after removing ac source before disassembling. Refer to manual for service instructions. DANGER HAUTE TENSION EMMAGASINEE Attendre 5 minutes après avoir enlevé la source de courant alternatif et avant de demonter la machine. Voir le manuel pour les instructions d’entretien.
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Figure 6–17: AC Switch Box AC SWITCH BOX ON/OFF SWITCH/ CIRCUIT BREAKER BLUE TO FILTER BROWN TO FILTER 2 1 2A 1A SW1 BLUE BROWN VIEW ON FRONT OF SWITCH AC SWITCH BOX RECTIFIER P2 P1 SPSX P2 7 RED 1 BROWN S + REAR OF PRINTER 5 3 WHITE BLUE - S P3 SPSX RECTIFIER ON/OFF SWITCH/ CIRCUIT BREAKER RE_UK00234A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–31
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CAUTION None of the ac switch box connector terminals are marked. Ensure that you replace each connector on the correct terminal. Mis-placement of any wires in the ac switch box will cause damage to the printer. 4. Remove the ac switch box rectifier as follows: a. Disconnect the four slide-on connectors and number them. b. Use a medium-size screwdriver to remove the pan head screw and washers that secure the rectifier. c. Remove the rectifier. 5.
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6.18 AC Circuit Breaker Use the following procedure to remove the ac circuit breaker (see Figure 6–17). Do the reverse of this procedure to reinstall the ac circuit breaker. 1. Remove the ac switch box (see Section 6.15). 2. Remove the switch/fuse plate and disconnect the four slide-on connectors from the ON/OFF switch. 3. Remove the spring-secured ON/OFF switch.
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6.19 Paper Feed Motor Use the following procedure to remove and replace the paper feed motor (see Figure 6–18). DANGER STORED HIGH VOLTAGE Wait five minutes after removing ac source before disassembling. Refer to manual for service instructions. DANGER HAUTE TENSION EMMAGASINEE Attendre 5 minutes après avoir enlevé la source de courant alternatif et avant de demonter la machine. Voir le manuel pour les instructions d’entretien.
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Figure 6–18: Paper Feed Motor SEE TIMING NOTE ON BOTTOM PULLEY RIGHT HAND SIDE TIMING BELT TORQUE THREE M4x12 CAP SCREWS TO 5.6 N.
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6.19.1 Removing the Paper Feed Motor 1. Remove the top enclosure (see Section 6.7). 2. Disconnect the motor electrical connectors at CA17-P2. 3. Use a wrench to loosen the three hex mounting bolts that secure the triangular plate. This lets you release the tension on the timing belt by pushing down on the spring in the upper left corner. 4. Remove the printer motor pulley belt by pushing down on the tension spring to release the belt tension. 5. Disconnect the four SHAD board cables.
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6.19.2 Replacing the Paper Feed Motor 1. Mount the motor to the side frame using the four screws removed in step 6 of the previous section. 2. Reinstall the SHAD board and enclosure removed in step 5 of the previous section. Make sure you reconnect all SHAD board cables. 3. Top and Bottom Pulleys: Ensure that the timing mark (notch) on the pulley is aligned with the timing mark (elongated slit) in the side frame. Tighten the three screws removed in step 3 of the previous section. 4.
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6.20 Paper Tension Assembly Use the following procedure to remove the paper tension assembly (see Figure 6–19). Do the reverse of this procedure to reinstall the paper tension assembly. 1. Open the front door (see Section 6.6). 2. Loosen the thumb screw on the yoke collar. 3. Remove the retaining ring on the paper tension assembly shaft. 4. Slide the paper tension assembly toward the left until it clears the right side of the frame, then slide it back to the right to remove it from the printer.
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Figure 6–19: Paper Tension Assembly TRACTORS (PAPER DRIVE MECHANISM) PAPER SUPPLY RETAINING RING PAPER TENSION ASSEMBLY THUMB SCREW YOKE ROUND SHAFT SQUARE SHAFT L.H. SIDE FRAME TRACTOR TRACTOR R.H.
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6.21 Paper Handling Assembly Use the following procedure to remove and replace the paper handling assembly (refer to Figures 6–20 to 6–21). 1. Remove the top enclosure (see Section 6.7) and open the front access panel. 2. Use a medium-size screwdriver to loosen the screws at the front of each side panel and remove both side panels. 3.
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Figure 6–20: Paper Handling Assembly (Part 1) TRACTORS SQUARE SHAFT WHITE DOT ALL 4 TRACTOR BELT WELDS OVERLAP FROM TOP AS SHOWN ’E’ RING ROUND SHAFT PULLEY NYLON SPRING & RETAINING RING SQUARE SHAFT ROUND SHAFT HORIZONTAL ADJUSTMENT KNOB HORIZONTAL VERNIER TIMING BELT IDLER BRACKET ADJUSTMENT SCREW PAPER TENSION LEVER BELT TENSION IDLER BRACKET ADJUSTMENT ARM TIMING BELT LINK ’E’ RING ACCESS APERTURE ROUND SHAFT PULLEY NYLON SPRING & RETAINING RING RE_UK00237A_89 REMOVAL AND REPLACEMENT PROCE
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Figure 6–21: Paper Handling Assembly (Part 2) ROUND SHAFT BEARING STOP SEE TIMING NOTE ON BOTTOM PULLEY TORQUE THREE M4x12 CAP SCREWS TO 5.6 N.m (NOTE THAT LOWEST ONE WAS LOOSENED IN STEP 3) HORIZONTAL ADJUSTMENT KNOB PAPER FEED MOTOR TORQUE FOUR M4x20 PAN HD SCREWS TO 0.22 N.
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6.21.1 Removing Upper Tractors 1. Remove the E-ring from the left end of the upper square shaft and pulley assembly. 2. Remove the square shaft and pulley assembly. 3. Turn the horizontal vernier knobs until the tractors reach full left stop. 4. Use a medium-size screwdriver to remove the two pan head screws and washers from the round shaft bearing stop at the right end of the round shaft. Remove the stop from the side frame. 5. Unlock the tractors from the round shaft.
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3. Remove the square shaft and pulley assembly through the right side of the printer. 4. Turn the horizontal vernier knobs until the tractors reach full left stop. Use a medium-size screwdriver to remove the two pan head screws and washers from the round shaft bearing stop at the right end of the round shaft. Remove the stop from the side frame. 5. Remove the E-ring on the round shaft at the end of the yoke by loosening the thumb screw on the yoke location collar. 6.
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6.21.3 Replacing Upper and Lower Tractors 1. For both upper and lower tractors: slide the square shaft, bearings, and pulley assemblies onto the tractors from the right side. The four white dots must be facing forward. 2. Install the E-ring on the left end of each square shaft. 3. Set the right side top and bottom pulley timing marks in alignment with the timing marks on the right hand side frame. 4. Install the right side timing belt. 5.
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6.22 Horizontal Vernier Timing Belt Use the following procedure to remove the horizontal vernier timing belt (refer to Figure 6–22). Do the reverse of this procedure to reinstall the timing belt. 1. Use a medium-size screwdriver to loosen the idler bracket adjustment screw. 2. Push down on the idler bracket to release tension and remove the timing belt. 3. Ensure both upper and lower tractors are positioned full left, then install the new timing belt. Route the belt as shown in Figure 6–22. 4.
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8. Install the top enclosure and close the front access panel. 9. Before operating the LG31 printer, set the paper gap adjuster, paper tension adjust lever, and the margin adjustment knob to the desired operational positions.
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6.23 SHAD Board Use the following procedure to remove the SHAD board (see Figure 6–23). Do the reverse of this procedure to reinstall the SHAD board. DANGER STORED HIGH VOLTAGE Wait five minutes after removing ac source before disassembling. Refer to manual for service instructions. DANGER HAUTE TENSION EMMAGASINEE Attendre 5 minutes après avoir enlevé la source de courant alternatif et avant de demonter la machine. Voir le manuel pour les instructions d’entretien.
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Figure 6–23: SHAD Board SHAD BOARD SHAD ENCLOSURE SURGE CAPACITOR CA14 42V CAPACITOR LEADS ACTUATOR CABLES CA19 SHAD ENCLOSURE COVER SHAD ENCLOSURE SURGE CAPACITOR ACTUATOR CABLES RE_UK00240A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–49
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6.24 Power Supply Boards Use the following procedure to remove the power supply card cage boards (see Figure 6–24). Do the reverse of this procedure to reinstall the power supply card cage boards. DANGER STORED HIGH VOLTAGE Wait five minutes after removing ac source before disassembling. Refer to manual for service instructions. DANGER HAUTE TENSION EMMAGASINEE Attendre 5 minutes après avoir enlevé la source de courant alternatif et avant de demonter la machine.
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Figure 6–24: Power Supply Boards SPSM SPSR CA 21 GROUND CABLE BOARD RETAINING SPACER RE_UK00241A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–51
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6.25 Logic Boards Use the following procedure to remove the logic boards from the LG31 printer (see Figure 6–25). Do the reverse of this procedure in the reverse order to reinstall the card cage boards. Note Take care when replacing the PCBs. They are slot dependent but are not keyed. The part description (SMMC) is marked both on the boards and on their respective slots. 1. Use a medium-size screwdriver to loosen the three screws at the front of the right side panel, and remove the side panel. 2.
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Figure 6–25: Logic Boards SMIM SMSM SMMC BOARD RETAINER SPACER SMIH RE_UK00242A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–53
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6.26 Printer Fans Use the following procedure to remove the LG31 printer fans (see Figure 6–26). Do the reverse of this procedure to reinstall the printer fans. 6.26.1 Front Fan 1. Open the front access panel and the shroud assembly door to access the front fan. 2. Disconnect the two electrical spade connectors on the front fan. 3. Use a medium-size screwdriver to remove the four pan head screws and associated hardware securing the fan. 4. Remove the front fan. 6.26.2 Rear Fan 1.
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Figure 6–26: Printer Fans FRONT FAN REAR FAN RE_UK00243A_89 REMOVAL AND REPLACEMENT PROCEDURES 6–55
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Chapter 7 PRINT QUALITY ADJUSTMENT PROCEDURES 7.1 Introduction This chapter describes how to obtain print quality test patterns and use them with print quality adjustment procedures to restore the best print quality possible. The procedures in this chapter are to be performed if print quality has degraded due to component wear and/or component replacement. 7.
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2. Press the ON LINE (3) key and observe that the printer enters the ADJUSTMENT mode (printer display changes to [ A d j]). In ADJUSTMENT mode, any existing special print modes are canceled. 3. Press the PRG (1) key and observe that the printer display changes to [.5 i 9], and print the Sample Test Patterns shown in Figures 7–3 to 7–6. Each of the test patterns can be accessed and run individually to enable the adjustment procedures to be performed quickly (see Section 7.6).
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Figure 7–1: Logic Boards, Test Points and Adjustments SMIH SMIM SMSM BOARD RETAINER SPACER SMMC RIGHT SIDE R26 ALE TP7 TP8 TP1 TP2 SMMC SPARE LOGIC LOCATION ALE1 SPARE LOGIC LOCATION SMSM SMIM SMIH SPARE LOGIC LOCATION R27 TP3 TP4 TP5 TP6 R52 R53 Potentiometer Locations on SMIH and SMMC Boards RE_UK00244A_89 PRINT QUALITY ADJUSTMENT PROCEDURES 7–3
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7.3 Shuttle Movement Amplitude Adjustment The initial amplitude setting is based on observation of shuttle movement on an active print actuator module, and is a coarse adjustment. 1. Gain access to the print actuator modules by setting the power switch OFF, disconnecting the power cable, removing the ribbon cartridge, and swinging back the shroud cover (Section 6.8). Note the three print actuator modules: each one has a display label on it as shown in Figure 7–2A.
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6. If the display label does not look like Figure 7–2B, adjust R152 (10 turn potentiometer) on the SMMC board until the display label looks like Figure 7–2B, or as close as possible. 7. Set the power switch OFF, disconnect the power cable, remove the SMMC board, set jumper J7/J8 to the J7 (normal) position, and replace the board. Close the shroud cover and replace the ribbon cartridge. 8. Run the ASCII print test. If the print quality is still unsatisfactory, proceed to Section 7.5.
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6. Set the power switch OFF, disconnect the power cable, remove the SMMC board, set jumper J7/J8 to the J7 (normal) position, and replace the SMMC board. 7. Run the ASCII print test. If the print quality is still unsatisfactory, proceed to Section 7.5. If the print quality is satisfactory, replace the logic board retainer, replace the left side panel, and return the printer to service.
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7.5 Test Pattern Adjustments The following test pattern adjustment procedures are based on obtaining correct test pattern printouts. There are five test pattern printouts (amplitude, horizontal timing, vertical timing, intermodule gap, and checkerboard) used with the print quality adjustment procedures. To adjust these print quality parameters, perform the test pattern adjustment procedures in the order given. 1.
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7.5.1 Amplitude Pattern Adjustment Procedure 1. Press the ON LINE (3) key and observe that the printer display changes to [.A P L]. The Amplitude Test Pattern is printed. Figure 7–3A represents a magnified view of three of the 30 vertical bars that are actually printed. Press the FCT (9) key to stop printing the pattern; press the FCT (9) key again to resume printing the same pattern. 2.
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Figure 7–3: Amplitude Pattern Sample Printouts A. Key 3: Amplitude pattern No. 1 Normal, no adjustment required. B. Key 3: Amplitude pattern No. 2. Amplitude swing too small (gap at center). Adjust R152 on SMMC board clockwise until amplitude pattern No. 1 is obtained. C. Key 3: Amplitude Pattern No. 3. Amplitude swing too large (dots overlap at center). Adjust R152 on SMMC board counterclockwise until amplitude pattern No. 1 is obtained.
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7.5.2 Vertical Timing Pattern Adjustment Procedure 1. Press the PAPER REV (6) key and observe that the printer display changes to [.U E P]. The Vertical Timing Pattern is printed. Figure 7–4A represents a magnified view of three of the 25 vertical bars that are actually printed. Press the FCT (9) key to stop printing the pattern; press the FCT (9) key again to resume printing the same pattern. 2.
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Figure 7–4: Vertical Timing Pattern Sample Printouts A. Key 6: Vertical timing pattern No. 1. Normal, no adjustment required. B. Key 6: Vertical timing pattern No. 2. If the five dots at the center of the columns form a shape as in pattern No. 2, the vertical timing is too early. Adjust R27 on SMIH board counterclockwise until a normal pattern is obtained. C. Key 6: Vertical timing pattern No. 3.
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7.5.3 Horizontal Timing Pattern Adjustment Procedure 1. Press the CPI LPI (5) key and observe that the printer display changes to [.H E P]. The Horizontal Timing Pattern is printed. Figure 7–4A representts a magnified view of three of the 33 bar pattern that is actually printed. Press the FCT (9) key to stop printing the pattern; press the FCT (9) key again to resume printing the same pattern. 2.
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Figure 7–5: Horizontal Timing Pattern Sample Printouts A. Key 5: Horizontal Timing Pattern No. 1. Normal, no adjustment required. B. Key 5: Horizontal Timing Pattern No. 2. Left inner line uneven; right inner line straight. To correct, adjust R26 on SMIH board counterclockwise. C. Key 5: Horizontal Timing Pattern No. 3. Left inner line straight; right inner line uneven. To correct, adjust R26 on SMIH board clockwise.
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7.5.4 Intermodule Gap Pattern Adjustment Procedure 1. Press the FONT (7) key and observe that the printer display changes to [.i 9 P]. The Intermodule Gap Pattern is printed. Figure 7–6A) represents a portion of one of the two vertival bars actually printed at the junction between the three Printer Actuator Modules. Press the FCT (9) key to stop printing the pattern; press the FCT (9) key again to resume printing the same pattern. 2.
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Figure 7–6: Intermodule Gap Pattern Sample Printouts A. Key 7: Inter-module Gap Pattern No.1. Normal, no adjustment required. B. Key 7: Inter-module Gap Pattern No.2. Shows excessive gap between modules. Modules must be re-registered to the right, see section 7.3.
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7.5.5 The Checkerboard Pattern 1. Press the SET TOF (8) key and observe that the printer display changes to [.c b P]. The Checkerboard Pattern is printed (see Figure 7–7). Press the FCT (9) key to stop printing the pattern; press the FCT (9) key again to resume printing the same pattern. 2. The checkerboard pattern is an overview of the entire adjustment procedure.
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Perform the procedure below if the Intermodule Gap Pattern printout is not the same as the printout in Figure 7–6 A. A short shank, medium-size screwdriver is required. 1. Gain access to the print actuator modules by setting the power switch OFF, disconnecting the power cable, removing the ribbon cartridge, and swinging back the shroud cover. 2. Disconnect the ribbon cable connectors from each of the three print actuator modules. 3.
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the pattern; press the FCT (9) key again to resume printing the same pattern. 11. If the printout of the Intermodule Gap Pattern is the same as Figure 7–6A, proceed to Section 7.5.4, step 5. 12. If the printout of the Intermodule Gap Pattern indicates bad module alignment (Figure 7–6 B), proceed directly to step 1 of this procedure.
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Appendix A LG31 SYSTEM FUSES Table A–1 locates, describes, and rates all LG31 system fuse and circuit breakers. Table A–1: The LG31 System Fuses Location Purpose/Description Number SMMC Protects 42V ribbon motor and paper motor power stages. Protects 42V bus line. Protects 42V power line on Shuttle power stage. F1 (3A, 125.1V) F2 (3A, 125.1V) F3 (3A, 125.1V) SPSM Input Voltage (100-240V) Protects each power stage. F1 (0.
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Appendix B CONTROL CODE AND CONTROL SEQUENCE SUMMARY Table B–1 lists the 7-bit control characters, Table B–2 lists the 8-bit control characters, and Table B–3 lists the escape and control sequences. The section cross-references in all three tables refer to the LG31 User’s Guide.
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B.1 The 7-Bit Control Characters Table B–1: The 7-Bit Control Characters Control Characters Description Section _{4.5.1.1 4.5.1.3 4.5.1.4 4.5.1.6 4.5.1.7 4.5.1.8 4.5.1.9 4.5.1.14 4.5.1.2 4.5.1.5 4.5.1.10 4.5.1.11 4.5.1.12 4.5.1.}
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B.2 The 8-Bit Control Characters Table B–2: The 8-Bit Control Characters Control Characters Description Section 4.5.2.1 4.5.2.2 4.5.2.3 4.5.2.4 4.5.2.5 4.5.2.6 4.5.2.7 4.5.2.8 4.5.2.9 4.5.2.11 4.5.2.11 4.5.2.12 4.5.2.13 4.5.2.13 4.5.2.
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B.3 The LG31 Escape and Control Sequences The escape and control sequences are shown in 8-bit format. Sequence characters are spaced for clarity. The spaces are not part of the format code. The row/column number below each character indicates the character’s position in the 8-bit DEC Multinational character set. Table B–3: LG31 Escape and Control Sequences Name Mnemonic Sequence Forward Index (5.4.7.
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Table B–3 (Cont.): LG31 Escape and Control Sequences Name Mnemonic Sequence VFU End Command (5.4.10.2) VFU CSI < I 1 9/11 3/12 3/1 6/12 Send to indicate that the printer that the VFU table loaded is complete VFU Load (5.4.10.1) VFU CSI < 1 h 9/11 3/12 3/1 6/8 Prepares the printer for loading the 1L channel VFU table Autowrap Mode (5.4.9.1) DECAWM CSI ? 7 h 9/11 3/15 3/7 6/8 Turns autowrap mode on. CSI ? 7 l 9/11 3/15 3/7 6/12 Turns autowrap mode off. Barcode Encoding (8.3.2, 8.3.
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Table B–3 (Cont.): LG31 Escape and Control Sequences Name Mnemonic Sequence P4 P5 P6 P7 P8 P9 Block Character Entering (8.4.2 8.4.
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Table B–3 (Cont.): LG31 Escape and Control Sequences Name Mnemonic Size Select (8.4.1) Sequence Defines the parameters for block characters. P1 P2 P3 P4 P5 Bold Printing (5.4.3) SGR Device Status Request (from host) (6.3.1) DA DSR the the the the the width of the block characters. height of the block characters. color of background. international character set designator. orientation of the block characters. CSI Ps m 9/11 *** 6/13 Turns the bold printing on or off.
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Table B–3 (Cont.): LG31 Escape and Control Sequences Name Mnemonic Sequence CSI ? 2 n 9/11 3/15 3/2 6/14 Enable brief unsolicited reports and send extended report. CSI ? 3 n 9/11 3/15 3/3 6/14 Enable extended unsolicited reports and send extended report. Device Status Report (from printer) (6.3.2) DSR Brief Report: CSI 0 n 9/11 3/0 6/14 No malfunction detected. CSI 3 n 9/11 3/3 6/14 Malfunction detected.
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Table B–3 (Cont.): LG31 Escape and Control Sequences Name Mnemonic Sequence Pn1 is the active line. Pn2 is the active column. Draw Vector (8.2.1) DECVEC CSI Pn1 ; ... Pn5 ! 9/11 *** 3/11 ... *** 2/1 Draw a line with length, width, and direction. | 7/12 Pn1 Function 0 Draw x line, horizontal 1 Draw y line, vertical Pn2 = x start position Pn3 = y start position Pn4 = line length Pn5 = line width Pn2 through Pn5 are in character, decipoint, or pixel units (selected by SSU sequence).
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Table B–3 (Cont.): LG31 Escape and Control Sequences Name Mnemonic Sequence Horizontal Position Absolute (5.4.7.4) HPA CSI 9/11 Selects Pn = Horizontal Position Relative (5.4.7.5) HPR CSI Pn a 9/11 *** 6/1 Adds Pn to the current active column. Pn = numeric value in character, decipoint or pixel units (selected by SSU sequence). Default value = 1. Horizontal Position Backward (5.4.7.6) HPB CSI Pn j 9/11 *** 6/10 Subtracts Pn from current active column.
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Table B–3 (Cont.): LG31 Escape and Control Sequences Name Mnemonic Sequence Margins, Top and Bottom (5.4.6.2) DECSTBM CSI Pn1 ; Pn2 r 9/11 *** 3/11 *** 7/2 Sets top and bottom margins in character, deci-point, or or pixel units (selected by SSU sequence). Pn1 = top margin and page home setting Pn2 = bottom margin setting Reset to Initial State (5.13) RIS ESC c 1/11 6/3 Resets the printer’s operating features to initial values. Select Font (5.4.3) SGR CSI 9/11 Selects Ps 10 11 . .
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Table B–3 (Cont.): LG31 Escape and Control Sequences Name Mnemonic Tabs, Setting Sequence See horizontal tabs (DECSHTS) and vertical (DECSVTS) tabs. Tabs, Clearing (5.4.8.5) TBC CSI 9/11 Clears Ps 0 1 2 3 4 Ps g *** 6/7 horizontal or vertical tabs. Function Clears one horizontal tab at active column. Clears one vertical tab at active line. Clears all horizontal tabs. Clears all horizontal tabs. Clears all vertical tabs. Vertical Pitch (5.4.5.
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Table B–3 (Cont.): LG31 Escape and Control Sequences Name Mnemonic Sequence Vertical Position Relative (5.4.7.5) VPR CSI Pn e 9/11 *** 6/5 Adds Pn to active vertical line. Pn = value in character, decipoint, or pixel units (selected by SSU sequence). Default value = 1. Vertical Tabs, Set (5.4.8.4) DECSVTS CSI Pn ; ... ; Pn v 9/11 *** 3/11 ... 3/11 *** 7/6 Sets up to 16 vertical tabs at one time (67 available vertical tab positions).
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Appendix C LG31 PRINTED CIRCUIT BOARD SUMMARY This appendix provides the part number, description, and location of the LG31 printed circuit board FRUs. Also provided is information about the board’s fuses, controls, indicators, and jumper settings where appropriate. The boards are listed in alphabetical order as follows. C.1 SCPI—Shuttle Control Panel Interface The SCPI board (P/N 29-26721-00) provides the interface (electrical connection) between the inner and outer control panels.
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C.2 SHAD—Shuttle Head Actuator Driver The SHAD board (P/N 29-26729-00) receives serial dot image information from the SMIH board and converts it to parallel information to drive (fire) the appropriate print head actuator. The SHAD board contains 33 actuator drivers. The SHAD board is located in the front row of connectors in the top back area of the printer Figure 6–23 is a layout diagram of the SHAD board, showing the location of the jumpers, and a potentiometer.
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C.3 SMDP—Shuttle Matrix Display Panel The SMDP board (P/N 29-26720-00) exchanges digital information with the SMSM board (located in the card cage). The SMDP board is also an interface for the inner control panel and the outer control panel. Mounted on the SMDP board is an audio beeper, the printer initialization switch (SW1), and three 7-segment LED displays. The SMDP board (see Figure C-2) is located under the inner control panel.
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C.4 SMIH—Shuttle Matrix Image Hardware The SMIH board (P/N 29-26731-00-00) receives serial data from the SMIM board (located in the card cage) in 33-bit strings, and sends it as serial dot image information to the SHAD board. The SMIH board (see Figure C-3) is located in the card cage. Fuses: Controls: Indicators: Jumpers: None R26 and R27 (see Chapter 5, Section 5.3, Print Quality Adjustment Procedures).
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Figure C–3: SMIH Board U13 U73 SMIH J2 XY J6 J8 J10 J12 J14 J16 J18 J20 J22 J24 J26 J28 J30 XY XY XY XY XY XY XY XY XY XY XY XY XY XY XY J3 J5 J7 J9 J11 J13 J15 J17 J19 J21 J23 J25 J27 J29 75 J31 J4 R26 R27 J32 75 RE_UK00258M_89 LG31 PRINTED CIRCUIT BOARD SUMMARY C–5
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C.5 SMIM—Shuttle Matrix Imaging Microprocessor The SMIM board (P/N 29-26730-00) sends command signals to the SMIH board, building dot rows to form font characters and sixel displays. The SMIM board also controls ribbon and paper movement. Four ROM chip locations (U23, U24, U38, U39) constitute the location of the resident font. The SMIM board (see Figure C-4) is located in the card cage.
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Figure C–4: SMIM Board U11 U40 Crystal U17 U18 U38 U32 U39 U33 Lithium Battery J26 J27 J4 J5 J8 U22 U21 U20 U19 J9 J12 J13 U23 U24 J16 J17 J22 J20 J21 J2 J3 J6 J7 J10 J11 J14 J15 J18 J19 SMIM J23 J24 J25 CR3 ALE RE_UK00262M_89 LG31 PRINTED CIRCUIT BOARD SUMMARY C–7
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C.6 SMMB—Shuttle Matrix Mother Board The SMMB board (P/N 29-27261-01) serves as the motherboard for the following four boards: SMIH SMSM SMMC SMIH Provision for three spare boards The SMMB (see Figure C-5) is located in the base of the logic module.
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SMMC SPS2 SMP1 SMSM SMIM SMIH SPS1 19 20 19 20 19 20 19 20 19 20 19 20 19 20 1 2 1 2 1 2 1 2 1 2 1 2 1 2 J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 J12 J13 40 39 40 39 40 39 40 39 40 39 40 39 40 39 P1A 20 19 20 1 2 1 2 59 60 60 59 60 59 60 59 60 59 60 59 20 2 60 2 1 2 1 2 20 19 20 19 20 19 20 2 1 19 1 19 19 1 59 40 39 40 39 40 39 40 39 40 39 40 39 40 39 J17 J18 J19 J20 J15 J16 44C502592 G01/000 SMMB/3 P3 60 59 60 59 60 59 60 59 60 59
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C.7 SMMC—Shuttle Matrix Motor Control The SMMC board (P/N 29-26735-00) provides drive voltages and control signals for the shuttle motor, paper motor, and ribbon motor. The SMMC board also controls the front and rear fans. The front is switched ON during printing, and OFF when not printing, while the rear fan is switched HI during printing, and LOW when not printing. Both fans are switched OFF when the shuttle is stopped (standby) to allow ribbon cartridge loading and to reduce standby noise.
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Figure C–6: SMMC Board F2 F3 3AMP F1 3AMP 3AMP J8 J7 J1 J2 U27 J3 J4 SMMC RIB RIB 0V CLK TP7 TP8 TP9 REG OUT TP10 PD OUT TP11 LVT TP1 R153 ERR AMP TP2 SINE 0V WAVE P.S.
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C.8 SMSM—Shuttle Matrix System Microprocessor The SMSM board (P/N 29-26733-00) provides interfacing and preliminary processing with the incoming serial data, and sends information to the control panels. NOTE The SMSI board (mounted on the SMSM board) is part of the serial interface. The SMSM board (see Figure C-7) is located in the card cage.
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Figure C–7: SMSM Board U3 CRYSTAL SERIAL INTERFACE SMSI PIGGYBACK U11 U11A U21 U21A U28 U30 U29 LITHIUM BATTERY J2 J3 J1 U46 U45 U44 J4 J5 U31 J6 J7 J8 J9 U47 U48 U49 J12 J16 J14 J20 J18 J24 J22 J13 J11 J17 J21 J25 J10 J15 J19 J23 CR4 SMSM ALE RE_UK00266M_89 LG31 PRINTED CIRCUIT BOARD SUMMARY C–13
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C.9 SPSM—Shuttle Power Supply Master WARNING The input voltage to the SPSM board is full wave rectified line voltage. Exercise care in troubleshooting this board to ensure personnel safety. The SPSM board (P/N 29-26734-00) converts full wave rectified line voltage to 85V by way of four driver and four power stages. The 85V is sent to the SPSR board (located in the power supply card cage). The SPSM board contains two LEDs (CR10 and CR48). CR10 glows when the 12V is at its operational level.
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Figure C–8: SPSM Board R102 P3 P2 P1 F2 R110 3A 250V F3 F1 3A 250V 1/2A 250V F4 3A 250V F5 3A 250V CR 10 CR 48 +85V +12VZ SPSM RE_UK00260M_89 LG31 PRINTED CIRCUIT BOARD SUMMARY C–15
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C.10 SPSR—Shuttle Power Supply Regulator WARNING The input voltage to the SPSM board is 85 V. Exercise care in troubleshooting this board to ensure personnel safety. The SPSR board (P/N 29-26732-00) provides all regulated voltages (42 V, 12 V, 5.1 V, and -12 V) required by the printer. Four LEDs indicate the presence of these voltages. NOTE If the crowbar on this board operates, the LG31 must be turned off for at least 30 seconds before power can be restored.
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Figure C–9: SPSR Board P3 P4 P2 P1 F1 6 AMP 250V J1 SPSR CR25 +12 V CR26 R87 +5.
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C.11 SPSX—Shuttle Power Supply Filter This board (P/N 29-26722-00) provides: • High frequency filtering. • Conversion of ac input voltage to dc voltage. The power supply filter assembly (see Figure C-10) is located at the rear base of the LG31 printer.
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C.12 SPSD—Shuttle Power Supply Discharge This board (P/N 29-26724-00) is mounted inside the rear panel (see Figure C-11). Figure C–11: SPSD Board 44B502454-001/000 SPSD R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 5 5 5 5 5 5 5 5 5 5 5 5 VR1 3 3 F1 0.
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C.13 SMSI—Shuttle Matrix Serial Interface The SMSI board (P/N 29-26723-00) is a piggyback board on the SMSM (see Figure C-12).
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Appendix D LG31 INTERCONNECTION DIAGRAMS LG31 INTERCONNECTION DIAGRAMS D–1
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D–2 LG31 INTERCONNECTION DIAGRAMS KEY EXTERNAL CONTROL PANEL SPSD SHROUD INTERLOCK SWITCH P3 PRINT MODULE DRIVE BUS - Fig. D6 CONTROL BUS - Fig. D5 POWER BUS - Fig. D4 CPU BUS - Fig. D3 40,000 MFD CAP. 21,000 MFD CAP. P2 P4 INTERNAL CONTROL PANEL P3 SMDP SERIAL DATA INPUT P1 SCPI P2 P3 EXTERNAL INTERFACE BUS - Fig. D2 FILTER ASSY.
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Figure D–2: External Interface Bus P3 1 6 7 8 9 10 SMDP GND ROW1 SPARE ROW2 COL2 COL1 P3 P2 1 6 7 8 9 10 1 6 7 8 9 10 SCPI GND ROW1 SPARE ROW2 COL2 COL1 EXTERNAL CONTROL PANEL P2 GND GND COL5 COL4 ROW1 COL3 ROW2 COL2 C0L1 1 2 3 4 5 6 7 8 9 10 INTERNAL CONTROL PANEL P4 BEEP ISU DD7 DD6 DD5 DD4 DD3 DD2 DD1 DD0 WRDIS COL5 COL4 ROW1 COL3 ROW2 COL2 COL1 OV +5-1V 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 B27 B26 B25 B24 B23 B22 B21 B20 B19 B18 B17 B16 B15 B14 B13 B12 B11 B10 B59 B01 B
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D–4 LG31 INTERCONNECTION DIAGRAMS See also Figs. D2, D4, D5 SMMB SMSI See also Figs.
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I N P U T A01 A02 B01 A55 A57 A58 OV 0V +5.1V -12V +12V PWR-UP FRAME FRAME AC SWITCH BOX ASSY SWITCH and FUSE PLATE ASSY GRN/Y GRN/Y 2 4 + S S RECTIFIER P1 LINE FILTER 3 1 P2 P3 RED WHITE BLUE BRN 7 5 SPSX 4 1 FRAME Z PV 5 3 1 SPSM FRAME PIGTAIL SHROUD INTERLOCK SWITCH P3 See also Figs. D3,D5 SMIM See also Figs. D3,D5 FILTER ASSY LINE A C A01 A02 B01 A55 A57 A58 OV 0V +5.
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STRIKER BAR OPEN SW 1 D–6 LG31 INTERCONNECTION DIAGRAMS See also Figs. D3, D4 SMIH Figs.
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Figure D–6: Print Module Driver Bus P4 TP-VREF TP-GND THERM 0 THERM 1 NWDO PWDO NWD1 PWD1 NWD2 PWD2 NWD3 PWD3 NWD4 PWD4 NWD5 PWD5 NWD6 PWD6 NWD7 PWD7 NWD8 PWD8 NWD9 PWD9 NWD10 PWD10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 N.C. N.C. THERM O THERM 1 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 N.C. N.C.
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Index A Actuator modules, 2–7 Adjustment procedures, 7–1 Amplitude Adjustment, 7–4 ASCII print test pattern, 5–16 Audio alarm, 1–3, 2–9 B 7-Bit, 1–4 8-Bit Codes, 1–4 8-bit format, B–4 C Circuit breakers, A–1 configuration menu, 3–3 Connector circuitry, 2–4 Control Code, B–1 Control-Panel,Inner, 1–3, 2–9, 2–10, 5–2, 5–5, 5–12, 6–10, 6–14, 6–15, 6–16, C–1, C–3 Control-Panel,Outer, 1–3, 5–2, 5–5, C–1, C–3 Control Panels, 1–3 Control Sequence, B–1 Cover Interlock Switch, 2–5, 2–11 CPI, 3–7 D DANGER, 6–20, 6–
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H Horizontal dot resolution, 1–5 I Initialization Switch, 2–10 Interconnection diagram, D–3 Interlock switch, shuttle access door, 2–5 Interlock switches, 2–1 L LED, 5–19 Linear Velocity Transducer, 2–6 Locked-up printer, 5–12 Logic PCBs, 2–4 LVT, 2–6, 2–12, 5–8, 5–10, 5–15, 6–24, 6–25, 7–5 M Major Components, 1–3 Margin Adjust Knob, 6–46, 6–47 margin example, 3–9 N NLQ font, 1–5 Non-PCB FRUs, 5–22 P Paper advance, 1–5 Paper Drive, 2–7 Paper drive mechanism, 2–1 Paper Gap Adjuster, 6–12, 6–46, 6–47 Pap
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Shuttle Motor, 2–5, 2–6, 2–11, 2–12, 5–6, 5–15, C–10 SMDP, 2–7, 2–9, 5–5, C–3 SMIH, 2–8, 2–11, 5–5, 5–8, 5–10, C–2, C–4, C–5, C–8 SMIM, 2–4, 2–8, 2–10, 2–11, 5–5, 5–8, 5–9, 5–11, C–6, C–7 SMMB, 6–48, C–8, C–9 SMMC, 2–5, 2–7, 2–8, 2–12, 5–5, 5–6, 5–8, 5–10, 7–4, 7–5, 7–6, A–1, C–8, C–10, C–11 SMMC board, 2–5 SMSI, 5–8, 5–9, C–12, C–20 SMSM, 2–7, 2–9, 2–10, 2–11, 5–5, 5–8, 5–9, 5–11, C–3, C–8, C–12, C–13, C–20 Specifications, 1–8 SPSM, 2–14, 5–5, 5–17, 5–19, 5–20, 6–50, A–1, C–14, C–15, C–16 SPSR, 5–5, 5–17,