A20 Digital Motherboard Removal (For Serial Prefix Jp1Kh, Jp2Kh, And My432); Tools Required; Procedure - Agilent Technologies E4991A Service Manual

Replacement Procedure
A20 Digital Motherboard Removal (for serial prefix JP1KH, JP2KH, and
MY432)
A20 Digital Motherboard Removal (for serial prefix JP1KH,
JP2KH, and MY432)

Tools Required

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Procedure

Step 1. Remove the mouse, the external keyboard and the parallel printer cable if they are
connected to the rear panel.
Step 2. Remove the outer cover as described in "Outer Cover Removal"
Step 3. Remove the power supply as described in "A50 Power Supply Assembly Removal (for
serial prefix JP1KH, JP2KH, and MY432)"
Step 4. Disconnect the following cables.
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Step 5. Remove the following boards.
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Step 6. Remove seven screws fastening the A20 to the bottom panel and remove the A20.
Step 7. Remove the CPU and CPU fan as described in "CPU Replacement (for serial prefix
JP1KH, JP2KH, and MY432)".
Step 8. Remove the DIMM64MB modules as described in "DIMM64MB Memory Module
Replacement (for serial prefix JP1KH, JP2KH, and MY432)".
NOTE To replace the A20, reverse the above procedure. And, configure the several jumpers and
BIOS parameters as described in "To Configure the A20 Digital Motherboard and BIOS
(for serial prefix JP1KH, JP2KH, and MY432)" on page 197.
292
Pozidriv screwdriver, pt size #1 (small)
Torx screwdriver, T15
A20 to A26 Display board IDE1 flat cable (item 1 in Figure 6-2 on page 236)
A20 to A26 Display board floppy flat cable (item 2 in Figure 6-2)
A20 to A10 Analog Motherboard power supply cable (item 3 in Figure 6-2)
A21 Analog Interface board as described in "A21 Analog Interface Board and
EEPROM Removal"
A24 GPIB board as described in"A24 GPIB/A25 LAN Board Removal (for serial
prefix JP1KH, JP2KH, and MY432)"
A25 LAN board as described in "A24 GPIB/A25 LAN Board Removal (for serial
prefix JP1KH, JP2KH, and MY432)"
A26 Display board as described in "A26 Display Board Removal"
Chapter 7