Agilent Technologies E8408A C-Size VXI Mainframe User and Service Manual Manual Part Number: E8408-90001 Printed in U.S.A.
Contents E8408A User and Service Manual Edition 2 AGILENT TECHNOLOGIES WARRANTY STATEMENT............................................ 5 Safety Symbols ............................................................................................................ 6 WARNINGS ................................................................................................................. 6 Declaration of Conformity.............................................................................................
Chapter 3 Servicing the Mainframe ............................................................................................ 45 Chapter Overview ...................................................................................................... 45 Replaceable Parts List ............................................................................................... 45 Problem Isolation .......................................................................................................
AGILENT TECHNOLOGIES WARRANTY STATEMENT AGILENT PRODUCT: E8408A C-Size VXI Mainframe DURATION OF WARRANTY: 3 years 1. Agilent Technologies warrants Agilent hardware, accessories and supplies against defects in materials and workmanship for the period specified above. If Agilent receives notice of such defects during the warranty period, Agilent will, at its option, either repair or replace products which prove to be defective. Replacement products may be either new or like-new. 2.
Documentation History All Editions and Updates of this manual and their creation date are listed below. The first Edition of the manual is Edition 1. The Edition number increments by 1 whenever the manual is revised. Updates, which are issued between Editions, contain replacement pages to correct or add additional information to the current Edition of the manual. Whenever a new Edition is created, it will contain all of the Update information for the previous Edition.
DECLARATION OF CONFORMITY According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014 Manufacturer’s Name: Manufacturer’s Address: Agilent Technologies, Inc. Measurement Products Unit 815 14th Street S.W. Loveland, CO 80537 Declares that the product: Product Name: C-Size VXI Mainframe Model Number: E8408A Product Options: This declaration covers all options of the above product.
Trademark Information Microsoft ®, Windows ®, and Windows® NT are registered trademarks of the Microsoft Corporation. All other brand and product names are trademarks or registered trademarks of their respective companies.
Chapter 1 Getting Started Chapter Overview Chapter contents are: • Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • Initial Mainframe Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • Installing VXI Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . • Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Configuration Portable Configuration Protective Bumpers Carrying Handle Protective Bumpers Carrying Strap And Accessory Pouch (E8396A) Protective Bumpers Protective Bumpers Rack Mount Configuration Rack Slide Kit Support Rail Kit (1494-0413) OR (E3663A) Right Hand Shown Right Hand Shown Rack Mount/Cable Adapter Kit (E8397A) Figure 1-1.
Initial Mainframe Setup The E8408A mainframe is shipped from the factory ready to use. This section describes procedures for initial mainframe setup, including: • AC Power Requirements • Positioning the Mainframe for Adequate Cooling • Connecting Permanent Earth Ground Note This chapter shows initial setup procedures for the Standard Configuration. See Chapter 2 - Installing Mainframe Options for information on rack mounting the mainframe and installing mainframe options.
Connecting Permanent Earth Ground WARNING The mainframe can be connected to a permanent earth ground. This connection is made on the back of the mainframe (see Figure 1-2). For protection from electrical shock when operating at frequencies greater than 66 Hz, connect the chassis ground terminal to permanent earth ground. 1 Connect a 16 AWG (1.3 mm or larger) wire to the PEM nut shown in Figure 1-2. The wire must be green with a yellow stripe, or bare (no insulation).
Installing VXI Instruments This section shows how to install A-, B-, and C-Size VXI instruments (modules) in an E8408A mainframe, including: • Slot 0 Functions • Installation Guidelines • Installing C-Size Instruments • Installing A- and B-Size Instruments Slot 0 Functions The E8408A mainframe has 4 slots labeled 0 through 3. Any VXI instrument can be installed in slots 1 through 3.
Installing VXI Instruments Using VIC If you use an E1406A Command Module or an E8491A PC Link to VXI Interconnect in Slot 0 of the mainframe, you can use the Agilent Technologies VXI Installation Consultant (VIC) to assist you in installing VXI instruments. To use VIC, follow these steps. For actual installation of instruments into the mainframe, see "Installing C-Size Instruments" or "Installing "A- or B-Size Instruments".
3 Tighten the Two Retaining Screws 2 Seat the Module by Pushing in the Extraction Levers Extraction Levers 1 Slide the Module into the Mainframe Until it Plugs into the Backplane Connectors Figure 1-3. Installing C-Size Instruments in the E8408A Mainframe . Slide the Adapter Module into the Mainframe Until it Plugs into the Backplane Connector Slide the B-Size Module into the Adapter Module Until it Connects Figure 1-4.
Front Panel Features Figure 1-5 shows the E8408A Front Panel features, and the table describes the features. When the mainframe is connected to an AC supply and the Power Switch is pressed ON, the Voltages, Temp, and Fan lights flash Amber for about one second, and then turn Green. These lights should remain Green. A flashing Amber light indicates an error condition. In this case, see Chapter 3 - Servicing the Mainframe.
Chapter 2 Installing Mainframe Options Chapter Overview This chapter contains procedures to install hardware options available with the E8408A mainframe, including: • Converting to Portable Configuration . . . . . . . . . . . . . . . . . . 17 • Rack Mounting Using Rack Slide Kit . . . . . . . . . . . . . . . . . . 20 • Rack Mounting Using Support Rail Kit . . . . . . . . . . . . . . . . . 31 • Installing Intermodule Chassis Shields . . . . . . . . . . . . . . . . .
Installation Procedure There are two main steps to convert to Portable Configuration for the E8408A mainframe: • Attach Carrying Strap and Accessory Pouch • Attach Laptop PC (Optional) Attaching Carrying Strap and Accessory Pouch 1 Remove the two M5 x 10 flat head screws from the carrying handle. 2 Attach Carrying Strap D-rings to the Carrying Handle using the two D-rings and the two M5 X 16 pan head screws. Be sure to replace the washers underneath the handle retainers.
3 Follow the steps in Figure 2-2 to attach the PC to the Laptop PC Platform. Note Once the hook and loop squares are attached to your Laptop PC, they will not interfere with the use of the PC for other applications. After initial installation, you can easily remove the PC and reattach it as needed. 4 As desired, connect an interface cable from the PC to the Slot 0 card in the mainframe.
Rack Mounting Using Rack Slide Kit This section contains instructions to mount the E8408A mainframe in a standard EIA cabinet using the Rack Mount/Cable Route Adapter Kit (E8397A) and the Rack Slide Kit (p/n 1494-0413). The rack slide kit allows you to extend the mainframe from the cabinet for easier access to installed instruments. Parts List Table 2-2 shows the parts for the Standard Rack Mount/Cable Routing Kit and for the Rack Slide Kit. Table 2-2.
Configure the Mainframe Remove Mainframe Items (as applicable) (Figure 2-3) 1 Remove the carrying handle/carrying strap. 2 Remove the two protective bumpers. 3 Remove the Accessory Pouch. 1 Remove Carrying Handle / Strap 2 Remove Protective Bumper from Each End 3 Remove Accessory Pouch Figure 2-3.
Install Rack Mount Labels (Figure 2-4) 1 Lay mainframe on its left side. 2 Open the Rack Mount/Cable Route Adapter Kit (E8397A). 3 Peel the protective backing from the two rack-mount front panel labels (in the E8397A kit) and carefully place them over the existing labels. Press to adhere. 1 Lay Mainframe on Side 2 Install Rack Mount Labels Figure 2-4.
Attach Handles to Rack Mount Adapters (Figure 2-5) 1 Attach a handle to the LH Rack Mount Adapter using two 10-32 X 0.375" flat head screws. 2 Attach a handle to the RH Rack Mount Adapter using two 10-32 X 0.375" flat head screws. Note The rack mount adapter without the opening is the left-side (LH) Rack Mount Adapter, and the rack mount adapter with the cable routing opening is the right-side (RH) Rack Mount Adapter.
Attach Rack Mount Adapters to Mainframe (Figure 2-6) Note The mainframe can be recess mounted up to 207 mm (approximately 8 inches) in 23 mm (approximately 1 inch) increments. When recessing the mainframe, make sure that six screws are used to attach the adapters on each side. For mass interconnect systems, the mainframe must generally be recessed. Check the mass interconnect system manufacturer’s instructions BEFORE attaching the adapters to the mainframe.
Set Up Rack Cabinet Remove Rack Slide Chassis Sections (Figure 2-7) 1 Open the Rack Slide Kit (1494-0413). 2 Remove the Left-Side (LH) Rack Slide Chassis Section from the Intermediate Section. 3 Slide the Intermediate Section back into the Stationary Section. 4 Remove the Right-Side (RH) Rack Slide Chassis Section from the Intermediate Section. 5 Slide the Intermediate Section back into the Stationary Section.
Connect Chassis Section to Rack Mount Adapters (Figure 2-8) 1 Connect the LH Rack Slide chassis section to the LH Rack Mount Adapter using four 10-32 x 0.375" pan head screws. 2 Connect the RH Rack Slide chassis section to the RH Rack Mount Adapter using four 10-32 x 0.375" pan head screws. Pan Head Screws Right Hand Chassis Section Left Hand Chassis Section Left Hand Rack Mount Adapter Pan Head Screws Right Hand Rack Mount Adapter Figure 2-8.
Install Channel Nuts for Rack Mount Adapters (Figure 2-9) 1 Determine the location for the mainframe in the cabinet. The E8408A mainframe requires 3 EIA Units, and should be placed between the EIA markers. 2 Select the holes for the LH and RH Rack Mount Adapters. See Figure 2-9 for the RH Rack Mount Adapter hole locations. (LH Rack Mount Adapter hole locations are the same.
Install Rack Slide Stationary Sections (Figure 2-10) Note For non-cabinets, you must add End Brackets (1494-0061) to the Rack Slide Kit (1494-0413). See the instructions for the 1494-0061 kit to install the rack slides. The Rack Slides occupy the center EIA unit of the three EIA units required for the E8408A mainframe. 1 Slide four 10-32 Self-Retained Nuts on the selected holes in the right hand vertical column of the cabinet. See Figure 2-10 for hole locations.
Installing the Mainframe Install the Mainframe in the Rack (Figure 2-11) 1 Slide the Rack Slide Intermediate Sections out from the Rack Slide Stationary Sections until they lock into place. WARNING To prevent possible injury during rack mounting, two people should lift the mainframe into the rack. 2 With one person on each side, lift the mainframe and slide the Chassis Sections into the Intermediate Sections until the Chassis Sections lock into place.
Connect/Route VXI Instrument Cables (Figure 2-12) 1 As required, install VXI instruments in the mainframe (See Chapter 1 - Getting Started). 2 Connect cable(s) to instrument front panel terminals as required. 3 Route cables through the right side cable tray/RH Rack Mount Adapter, as required. Note Cables should not be routed on the left side of the mainframe as the cables may interfere with proper airflow. VXI Instruments Cable Tray Figure 2-12.
Rack Mounting Using Support Rail Kit This section contains instructions to mount the E8408A mainframe in a standard EIA cabinet using the Rack Mount/Cable Route Adapter Kit (E8397A) and the E3663A Support Rail Kit (E3663A). The E3663A is only compatible with standard EIA cabinets. Parts List Table 2-3 shows the parts for the Standard Rack Mount/Cable Routing Kit and the Support Rails Kit Table 2-3.
Configure the Mainframe Remove Mainframe Items (as applicable) (Figure 2-13) 1 Remove the carrying handle/carrying strap. 2 Remove the two protective bumpers. 3 Remove the Accessory Pouch. 1 Remove Carrying Handle / Strap 2 Remove Protective Bumper from Each End 3 Remove Accessory Pouch Figure 2-13.
Install Rack Mount Labels (Figure 2-14) 1 Lay mainframe on its left side. 2 Open the Rack Mount/Cable Route Adapter Kit (E8397A). 3 Peel the protective backing from the two rack-mount front panel labels (in the E8397A kit) and carefully place them over the existing labels. Press to adhere. 1 Lay Mainframe on Side 2 Install Rack Mount Labels Figure 2-14.
Attach Handles to Rack Mount Adapters (Figure 2-15) 1 Attach a handle to the LH Rack Mount Adapter using two 10-32 X 0.375" flat head screws. 2 Attach a handle to the RH Rack Mount Adapter using two 10-32 X 0.375" flat head screws. Note The rack mount adapter without the opening is the left-side (LH) Rack Mount Adapter, and the rack mount adapter with the cable routing opening is the right-side (RH) Rack Mount Adapter.
Attach Rack Mount Adapters to Mainframe (Figure 2-16) Note The mainframe can be recess mounted up to 207 mm (approximately 8 inches) in 23 mm (approximately 1 inch) increments. When recessing the mainframe, make sure that six screws are used to attach the adapters on each side. For mass interconnect systems, the mainframe must generally be recessed. Check the mass interconnect system manufacturer’s instructions BEFORE attaching the adapters to the mainframe.
Set Up Rack Cabinet Install Channel Nuts for Rack Mount Adapters (Figure 2-17) 1 Determine the location for the mainframe in the cabinet. The E8408A mainframe requires 3 EIA Units, and should be placed between the EIA markers. 2 Select the holes for the LH and RH Rack Mount Adapters. See Figure 2-17 for the RH Rack Mount Adapter hole locations. (LH Rack Mount Adapter hole locations are the same.
Install Support Rails (Figure 2-18) 1 Open the Support Rail Kit (E3663A). 2 Hook the Support Rails in position in the Rack Cabinet. The Support Rails occupy the bottom EIA unit of the three units required for the E8408A mainframe. WARNING 3 Slide a 10-32 Self-Retained Nut (provided in the Support Rail Kit) over the appropriate holes in the front and rear right hand vertical columns in the cabinet. Repeat for the left hand vertical columns.
Installing the Mainframe Install the Mainframe in the Rack Cabinet (Figure 2-19) 1 WARNING With one person on each side, lift the mainframe and slide the mainframe fully onto the Support Rails. To prevent possible injury during rack mounting, two people should lift the mainframe into the rack. 2 Slide the mainframe into the rack until the Rack Mount Adapter flanges are against the rack’s front vertical columns. 3 Secure the mainframe to the rack using the four adapter dress screws.
Connect/Route VXI Instrument Cables (Figure 2-20) 1 As required, install VXI instruments in the mainframe (See Chapter 1 - Getting Started). 2 Connect cable(s) to instrument front panel terminals as required. 3 Route cables through the right side cable tray/RH Rack Mount Adapter, as required. Note Cables should not be routed on the left side of the mainframe as the cables may interfere with proper airflow. VXI Instruments Cable Tray Figure 2-20.
Installing Intermodule Chassis Shields This section describes how to install Intermodule Chassis Shields (E8400-80919) in the E8408A mainframe. The chassis shield is the implementation of VXI revision 1.4, specification B.7.3.4 that allows grounded shielding between mainframe slots. The shield is used to isolate VXI modules that generate electromagnetic interference (EMI) at excessive levels, or to protect VXI measurement modules from noise sources.
Grounding Spring Socket VXI Module Guide Chassis Shield Guide Use a Small Screw Driver to Secure Spring Under SocketTab Figure 2-21. Installing the Grounding Springs and Chassis Shield. Installing Backplane Connector Shields This section describes how to install backplane connector shields (E8408-80900) in the E8408A mainframe. The shields are the implementation of VXI revision 2.0, specification B.7.2.3 which ensures compliance with RFI levels specified in standards EN55011 and CISPR11.
Installation Procedure 1 Position Shields. Position the shields over the backplane connectors as shown in Figure 2-22. Two connector shields and four screws are required for each slot. 2 Install Screws. To install the screws, firmly press the screw onto a driver. This prevents the screw from falling off as you reach into the mainframe. Placing a sheet of paper under the backplane connectors will catch screws if they fall. 3 Tighten Screws. Tighten the screws by turning them clockwise.
Installing the Airflow Restricter Kit This section shows how to install an (optional) airflow restricter kit (E8400-80917) in the E8408A mainframe. To install the kit: 1 Disconnect AC power from the mainframe and place mainframe on bench. 2 As required, remove filler panels and/or installed VXI instruments from the mainframe. 3 Follow the steps in Figure 2-23 to install the Airflow Restricter.
Notes: 44 Installing Mainframe Options Chapter 2
Chapter 3 Servicing the Mainframe Chapter Overview This chapter contains information for troubleshooting and replacing selected components of the E8408A VXI mainframe. This chapter includes the following information: • Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • Problem Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • Replacing Mainframe Components . . . . . . . . . . . . . . . . . . . • Cleaning Instructions . . . . . . . . . . . . . . .
Problem Isolation Table 3-2 lists primary mainframe symptoms, possible cause(s), and suggested actions. Table 3-1 shows replacement part numbers. Table 3-2. Isolating Problems in the E8408A Mainframe Symptom Possible Cause Action Power Supply fuse blown or defective Power Supply - There are NO replaceable power line fuses on mainframe. - If the mainframe power supply fails to operate, replace the Power Supply Assembly.
Removing Mainframe Accessory Items For some component removal/replacement, you may need to remove mainframe accessory items (as applicable) (see Figure 3-1) 1 Remove the carrying handle/carrying strap. 2 Remove the two protective bumpers. 3 Remove the Accessory Pouch. 1 Remove Carrying Handle / Strap 2 Remove Protective Bumper from Each End 3 Remove Accessory Pouch Figure 3-1.
Removing the Mainframe Cover For some component removal/replacement, you may need to remove mainframe cover (see Figure 3-2). 1 Turn off the mainframe and remove the AC power cord. 2 If mainframe is rack-mounted, remove the mainframe from the rack and place the mainframe at a static-controlled workstation. 3 Remove mainframe items as required. See "Removing Mainframe Items". 4 Remove the ten M3x6 flat head screws (five on each side of the mainframe).
Replacing the Power Supply Assembly Note This section gives guidelines to replace the Power Supply Assembly (E8408-69005 [Standard] or E8408-90006 [Option 001]) in the E8408A mainframe (see Figure 3-3). Although the Power Supply Assembly contains the power supply and the Interconnect Board, do NOT remove the Power Supply or the Interconnect Board from the Assembly. Return the entire Power Supply Assembly to Agilent for a (remanufactured) Power Supply Assembly. See Table 3-1 for replacement part numbers.
Replacing the Monitor Board This section gives guidelines to replace the Monitor Board (E8408-66502). See Table 3-1 for a replacement part number. 1 Turn off the mainframe and remove the AC power cord. 2 If the mainframe is rack-mounted, remove the mainframe from the rack and place the mainframe at a static-controlled workstation. 3 Remove mainframe option items as required. See "Removing Mainframe Accessory Items". 4 Remove the mainframe cover. See "Removing the Mainframe Cover".
Replacing the Fan Assembly This section gives guidelines to replace the Fan Assembly in the E8408A mainframe (see Figure 3-5). See Table 3-1 for a replacement part number. 1 Turn off the mainframe and remove the AC power cord. Note Be sure to observe static-free procedures when removing/installing the Fan Assembly. 2 Remove mainframe accessory items as required. See "Removing Mainframe Accessory Items". 3 Remove the Power Supply Assembly. See "Replacing the Power Supply Assembly".
Replacing the Front Panel Tapped Strip This section gives guidelines to replace the Front Panel Tapped Strip. See Table 3-1 for a replacement part number. 1 Turn off the mainframe and remove the AC power cord. 2 If the mainframe is rack-mounted, remove the mainframe from the rack and place the mainframe at a static-controlled workstation. 3 Remove mainframe accessory items as required. See "Removing Mainframe Accessory Items". 4 Remove the mainframe cover. See "Removing the Mainframe Cover".
Replacement Power Cords Table 3-3 lists the power cords rated for use with the E8408A mainframe. If it is necessary to replace the power cord, obtain the appropriate cord listed in the table or use a cord with the same voltage and current ratings. Table 3-3. Replacement Power Cords for E8408A VXI Mainframe Country Voltage Part Number Rated Amps U.K. 250 VAC 8120-1351 10A Australia 250 VAC 8120-1369 10A Europe 250 VAC 8120-1689 10A U.S./Canada 125 VAC 8120-1378 10A U.S.
Notes: 54 Servicing the Mainframe Chapter 3
Appendix A E8408A Product Specifications Product Description This section describes the E8408A mainframe, including: • Product Dimensions • Options and Accessories • General VXI Specifications • Mainframe Monitor Specifications • Backplane Specifications Product Dimensions Figure A-1 shows E8408A dimensions. Empty mainframe weight is 8.6 Kg (19 lb.) without protective bumpers and 9.1 Kg (20 lb.) with bumpers. Weight with four average VXI modules installed is 15.9 Kg (35 lb). Maximum module weight is 3.
Options and Accessories Description Product Number Standard Configuration 4-Slot, C-Size 175 W VXI Mainframe (includes front panel indicators, protective bumpers, and carrying handle) E8408A VXI Instruments (Modules) Installed with Standard Settings E8404A Option 500 Installed Backplane Connector Shields E8408A Option 918 Standard Configuration, except Add Additional Current from -5.
General VXI Specifications Category Specifications VXI Device Type: Mainframe Data Transfer Bus: All per VXIbus Specification, Rev 1.4 Size: C-Size Slots: 4 available Connectors: P1/P2 Shared Memory: n/a VXI Buses: per VXIbus Spec, Rev 1.4 Monitor Specifications Interface Description Power Switch Stdby - AC power is applied to the mainframe, but not to installed VXI instruments. On - AC power applied to the mainframe, and DC to installed VXI instruments.
Power Specifications This section describes E8408A mainframe power specifications for the Standard and Option 001 configurations. The total power delivered from the Option 001 configuration cannot exceed the total power delivered from the Standard configuration. Total Usable Power 1 Temperature Usable Power (90-264 Vac)1 0 - 40°C 175 W 40 - 50°C 150 W 50 - 55°C 125 W Total output before thermal shutdown or safety limitation.
Output Voltage Voltage Allowed Variation* Ripple/Noise DC Load* Induced Ripple/Noise* +5V +0.25V / –0.125V 50mV 50mV +12V +0.60V / –0.36V 50mV 50mV -12V –0.60V / +0.36V 50mV 50mV +24V +1.20V / –0.72V 150mV 150mV -24V –1.20V / +0.72V 150mV 150mV -5.2V –0.26V / +0.156V 50mV 50mV -2V –0.10V / +0.10V 50mV 50mV * Specifications apply at the backplane, 0 - 55 oC.
Cooling Specifications This section lists E8408A mainframe cooling specifications, including: • Cooling Table • Cooling Chart Cooling Table Area Specification/Comments Cooling Modes High or variable cooling mode switchable on the front panel. Same fan cools power supply and modules. High-Speed Fan Mode Maximum airflow all the time. Variable Fan Speed Mode: Fan speed changes between high and low as a function of ambient and power supply temperatures.
Safety/Environmental Specifications This section describes safety and environmental specifications for the E8408A mainframe, including: • Environmental Specifications • Electromagnetic Compliance/Safety Specifications • Power Supply Protection • Repair Environmental Specifications Area Specification Operating Location Indoor: Sheltered location where air temperature and humidity is controlled within this product’s specifications and the equipment is protected against direct exposure to climatic conditio
Electromagnetic Compliance/Safety Specifications Power Supply Protection Over-Temperature Protection Over-Voltage Protection Short-to-Ground Protection The E8408A mainframe conforms to the EMC and safety product specifications listed in the Declaration of Conformity (see Page 7). EMC performance can be further enhanced with the following shields: • Front panel gasketing provided per VXI Rev. 2.0, B.7.2.3 • Backplane connector shields per VXI Rev 2.0, B.7.2.
Short-to-Other Protection A short-to-other output will generally cause a global shutdown. When the fault is removed, the supplies will typically recover when the Power On/Standby switch is cycled. However, if this switch is cycled while the fault is still present, some supplies may become active or global shutdown may occur again. Conditions such as +5V-to-other output and -12V-to-(-5.2V) may cause a shutdown that will not respond to cycling the Power On/Standby switch.
Notes: 64 E8408A Product Specifications Appendix A
Index E8408A User and Service Manual M A AC power requirements, 13 airflow restricter kit,installing, mainframe cooling, 13 portable configuration, 19 rack mounting using rack slide kit, 21 rack mounting using support rail kit, 32 mainframe components, replacing, 48 monitor board, replacing, 52 44 B backplane connector shields, installing, 43 C component failures, 48 cooling chart, 62 cooling specifications, 62 cooling table, 62 cooling, mainframe, 13 O options and accessories, 58 P D display, fr
R (continued) W replacing components removing mainframe cover, 50 removing mainframe items, 49 removing power supply assembly, 51 replacement power cords, 55 replacing fan, 53 replacing front panel tapped strip, 54 replacing monitor board, 52 replacing mainframe components, 48 replacing the fan, 53 replacing the front panel tapped strip, 54 replacing the monitor board, 52 restricted rights statement, 7 S safety symbols, 8 safety/environmental specifications, 63 specifications backplane specifications, 59
