Service manual

ManualsBrandsSharp ManualsCash RegisterER-A242

CODE : 00Z

SERVICE MANUAL

CONTENTS

Parts marked with "!" are important for maintaining the safety of the set. Be sure to replace these parts with specified

ones for maintaining the safety and performance of the set.

SHARP CORPORATION

This document has been published to be used

for after sales service only.

The contents are subject to change without notice.

ERA242USME

ELECTRONIC

CASH REGISTER

MODEL ER-A242

(U version)

CHAPTER 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

CHAPTER 2. OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CHAPTER 3. MASTER RESET AND PROGRAM RESET. . . . . . . . . 5

CHAPTER 4. HARDWARE DESCRIPTION . . . . . . . . . . . . . . . . . . . . 6

CHAPTER 5. TEST FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

CHAPTER 6. CAUTION TO BE USED WHEN CONNECTING

THE RS-232 CABLE. . . . . . . . . . . . . . . . . . . . . . . . . . 15

CHAPTER 7. CIRCUIT DIAGRAM AND PWB LAYOUT . . . . . . . . . 16

Summary of content (27 pages)

PAGE 1
SERVICE MANUAL CODE : 00ZERA242USME ELECTRONIC CASH REGISTER MODEL ER-A242 (U version) CONTENTS CHAPTER 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 CHAPTER 2. OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 CHAPTER 3. MASTER RESET AND PROGRAM RESET. . . . . . . . . 5 CHAPTER 4. HARDWARE DESCRIPTION . . . . . . . . . . . . . . . . . . . . 6 CHAPTER 5. TEST FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 CHAPTER 6.
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CAUTIONS THERE IS A RISK OF EXPLOSION IF THE BATTERY IS REPLACED BY AN INCORRECT TYPE. PROPERLY DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
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CHAPTER 1. SPECIFICATIONS ■Key names 1.
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The mode switch has these settings: OFF: Operator display This mode locks all register operations. (AC power turns off.) No change occurs to register data. DEPT OP X/Z: To take individual clerk X or Z reports, and to take flash reports. It can be used to toggle receipt state “ON” and “OFF” by pressing he [RCPT/PO] key. REG: To program various items. VOID: Enters into the void mode. This mode allows correction after finalizing a transaction. MGR: For manager’s entries.
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6. PRINTER Segment Display position Description Amount 1-8 Minus sign 2-10 -: Floating Error 8-10 Exx:xx = error code PGM Mode 10 1) Printer • Part number : M-T53II • NO. of station : 1 (Receipt or journal) • Validation : No. F: Light up when a registration is f inaliz ed by de pres sing CA S H, CHECK, CHARGE key • Printing system : Line thermal • No. of dot : 288 dots P CASH, CHECK, CHARGE 10 SUB TOTAL/ short tender 10 o • Dot pitch : Horizontal 0.167mm Vertical 0.
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7. DRAWER 8. BATTERY [OUTLINE] 1) MEMORY BACK UP BATTERY • Standard equipment: Yes (1) For memory back up, the dry battery AA (3 pieces) are needed. • Max. number of additional drawers: 0 1. Memory holding time: • The drawer consists of: Approx. 1 year after New dry batteries are installed. 1) Drawer box (outer case) and drawer 2.
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CHAPTER 2. OPTIONS 1. OPTIONS (NO) 2. SERVICE OPTIONS (NO) 3. SUPPLIES NO 1 PARTS CODE PRICE RANK TPAPR6656RC05 BA PARTS CODE PRICE RANK UKOG-6705RCZZ BC NAME Thermal roll paper DESCRIPTION 5 ROLLS/PACK 70 φ 4. SPECIAL SERVICE TOOLS NO 1 NAME RS-232 Loop-back connector DESCRIPTION CHAPTER 3. MASTER RESET AND PROGRAM RESET 1. MASTER RESETTING 2. PROGRAM RESETTING (INITIALIZATION) Master resetting clears the entire memory and resumes initial values.
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CHAPTER 4. HARDWARE DESCRIPTION 1. HARDWARE BLOCK DIAGRAM POWER SUPPLY STANDARD DRAWER. CPU Data bus DRIVER , SENSOR ROM : 256K Byte RAM : 20K Byte RAM Address bus 128K Byte POPUP Seg. DRIVER PRINTER M-T53II FRONT LED 4 to 16 DECORDER Dig.
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2) Pin description PQ1CG2032 TRANSFORMER V0 24V Pin No. Drawer SYMBOL SIGNAL NAME In/ Out Function 1 SOUT4 P96 In Key IN 2 CLK4 P95 In Key IN 3 TB4IN P94 In Key IN 4 TB3IN P93 In Key IN 5 SOUT3 P92 In Key IN VCC 5V 6 SIN3 P91 In Key IN VDD 5V 7 CLK3 P90 In Key IN 8 BYTE VDD In VDD ON/OFF Control (MODE SW) 9 CNVss CNVss In Normal : L VH, VP (8V) PRINTER HEAD, MOTOR PAPER TAKEUP MOTOR 10 XCIN XCIN In Calender clock :32.768KHz Calender clock :32.
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Pin No. SYMBOL SIGNAL NAME In/ Out 53 A17 A17 Out Address bus :17 54 A16 A16 Out Address bus :16 55 A15 A15 Out Address bus :15 56 A14 A14 Out Address bus :14 57 A13 A13 Out Address bus :13 58 A12 A12 Out Address bus :12 59 A11 A11 Out Address bus :11 60 A10 A10 Out Address bus :10 Out 3.
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The P-OFF signal detects two signals by two comparators and sent to the CPU. 7. PRINTER CONTROL CIRCUIT V0 (24V) signal: If the power voltage V0 (24V) falls bellow the specified level, the P-OFF signal is driver to LOW by the comparator ICAA. 1) Paper feed motor circuit VLED signal: VH If the LED/Logic power voltage VLED falls below the specified level, the P-OFF signal is driven to LOW by the comparator IC4B. VCC CPU P14 P15 P16 10uF/50V A /A B /B IC13 P17 6.
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9. DRAWER DRIVE CIRCUIT Thermal head block daigram Dot #288 Dot #1 5,6,18,19 VP 9,10,14,15 V0 T400mA/250V GND 11 DIA IN4002 CPU STB1 FB2 C80 0.1u CN6 FB3 /RTS0 13 F6 DR1 DRAWER R102 Q9 2SD2212 (38pin) STB2 1K FB2, FB3: Jumper Wire 7 Latch register LAT 16 Shift register CLK 17 DAT 12 VCC When the DR1 signal from the CPU is HIGH, Q9 is turned on to operate the solenoid. Connector Thermal head strobe terminals STB No. Dot No.
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1) Keyboard 5) Paper end sensor Scan signal: Scan signal: 10 /S0-9 signals 1 /S4 signal Return signal: 6 P92-97 signals Return signal: 1 P91 signal The keys are read by the key matrix following the above signals. The paper end sensor state is read by the above signals.
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CHAPTER 5. TEST FUNCTION 1. TEST ITEMS 2) KEY CODE 1 Key operation Key turned to PGM. The test items are as follows: NO.
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4 End of testing 3 Check that: When the test ends normally When an error occurs 104 E- ~ - 104 “-” blinks and the clock counts up. 4 End of testing Note: Calculation of key sumcheck data The hard code (hexadecimal number) at the position (excluding feed key) where there is an input data contact is added. However, the end key (CA/AT/NS) is not added.
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4 End of testing 12) AD conversion port The program ends after printing. 1 Key operation When the test ends normally. When the test ends abnormally. Ex- ~ - 120 120 ***** x = 1: Data error x = 2: Address error 160 2 Test procedure The test program displays the voltage of each AD port. 1. Head temperature When an error occurs, the printer outputs the error message and then the address where the error has occurred in the area ****. 2. Head voltage 3.
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CHAPTER 6. CAUTION TO BE USED WHEN CONNECTING THE RS-232 CABLE When connecting the RS-232 cable to the ER-A242, be sure to observe the following condiiton: Use RS-232 cable (with core) of accessories. [This is a necessary to support the EMI (Electronics Magnetic Interface).] RS-232 CONNECTOR Use RS-232 cable (with core) of accessories.
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A B C 6 5 R54 240 X3 1 3 74F32 Vcc:14pin GND:7pin 2 1 R91 3.3K 8 3 100pF 820 C37 R56 3.3K R57 VCC FS781 R55 47K 1 2 3 7 P97 Q Q 6 5 33 R62 VDD C39 R58 100K VCC 91pF C108 74F74 Q Q 8 9 10uF/10V,OS C42 + VCC IC11B 12 D 11 CLK /RDY 0.1uF C41 2200pF 100 100 100 100 100 100 100 100 VDD 100pF P100 P101 C107 4.
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ER-A242U CIRCUIT DIAGRAM AND PWB LAYOUT – 17 – A B C D CN3 8 D G /S3 /S4 /S5 /S6 /S0 /S1 /S2 /S7 /S8 /RESET P90 P91 P92 P93 P94 P95 P96 P97 /S9 /VON a b c d e f g dp /S3 /S4 /S5 /S6 PE 7 C74 0.1uF VLED /S0 /S1 /S2 /S7 /S8 /RESET P90 P91 P92 P93 P94 P95 P96 P97 /S9 /VON a b c d e f g dp G 10K S /S7 KST0 KST1 KST2 KST3 D VH Q6 MTD2955V C72 0.1uF HUPS KRC111S Q8 2SK2731 S 7 R95 NOT INSTALL /VPON C71 0.
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A B C D R15 2.7K NO T USED 8 R18 3.9K ZD4 MTZ J5.1B 1uF /50V 2 3 + - IC4A BA10 393 R17 0 VO OFF - OPEN ON - GND R20 2.7K VCC 0 7 6 5 VLE D + - /VO N - C15 0.1uF 6 6 C10 0.1uF R2 49 33 7 C1 MYLO R 0.033u F IC4B BA10 393 R2 45 F1 3.15A NOT INSTALL B2P -VH 1 2 CN 1 MODE SW P-OFF 1 56K R19 POWER T RANS 1 2 POWER T RANS R16 9.1KG 0 R2 44 C14 + 202U/A : 120 V 202V6/7:23 0V-240V 2021V4: 220V-230V 7 + + C4 + ZD3 MTZJ 5.
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– 19 – CIRCUIT DIAGRAM AND PWB LAYOUT A B C D 8 8 P91 /S9 P76 P77 P75 P66 P67 P74 P64 7 6 21 20 6 7 16 15 14 P9 1 /S9 1SS3 55 Q14 19 P7 6 24 22 P7 7 26 5 C8 6 0.1uF P7 5 KRC 111S R2 43 10 K C8 5 0.1uF 12 8 D16 (BUSY:FOR BOOT) R2 42 10 K 6 P6 6 P6 7 P7 4 P6 4 R2 47 10 K 7 IC 14 HIN 211 /EN R5OUT R4OUT R3OUT R2OUT V- V+ /SHDN R5IN R4IN R3IN R2IN R1IN T4OUT T3OUT T2OUT T1OUT VCC R1OUT T4IN T3IN T2IN T1IN C2- C2+ C1- C1+ 0.
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ER-A242U CIRCUIT DIAGRAM AND PWB LAYOUT – 20 – A B C D 7 8 7 ONLY HOLE 1 2 3 4 5 6 7 8 9 10 11 12 CN4D ONLY HOLE 1 2 3 4 5 6 7 8 9 10 11 12 CN4C 2. PRINTER I/F PWB CIRCUIT 8 6 6 5 5 C201 0.1uF 4 VP 4 VCC C200 0.1uF 3 3 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 27 27FMN-BTK-A A /B B /A N.C VP VP /LAT /TH GND GND /STB1 VCC /STB2 GND GND CLK DAT VP VP N.C N.C VCC LED PE HUPS N.
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1. MAIN PWB LAYOUT PWB LAYOUT A.
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B.
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2. KEY INTERFACE PWB LAYOUT A. side B. side 3.
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4. REAR DISPLAY PWB LAYOUT 5.
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COPYRIGHT  2006 BY SHARP CORPORATION All rights reserved. Printed in Japan. No part of this publication may be reproduced, stored in a retrieval system, or transmitted. In any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.