Cpu Replacement (For Serial Prefix Jp1Kh, Jp2Kh, And My432); Tools Required; Procedure - Agilent Technologies E4991A Service Manual

Replacement Procedure

CPU Replacement (for serial prefix JP1KH, JP2KH, and MY432)

CPU Replacement (for serial prefix JP1KH, JP2KH, and
MY432)
There is a CPU on the A20 Digital Motherboard.

Tools Required

•

Procedure

NOTE Always handle the CPU by the edges, never touch the pins.
Step 1. Remove the outer cover as described in "Outer Cover Removal"
Step 2. Remove the power supply as described in "A50 Power Supply Assembly Removal (for
serial prefix JP1KH, JP2KH, and MY432)"
Step 3. Disconnect the CPU fan cable from J16 CPU fan connector.
Step 4. Separate the heatsink clip from the CPU socket tabs using the flat edge screwdriver.
Step 5. Pull the CPU socket release lever laterally away from the CPU socket to disengage the
level from the locking tab. Then rotate the lever upward to release the CPU from the CPU
socket.
Step 6. Lift the CPU out of the socket.
Step 7. To replace the CPU, reverse the CPU removal procedure. Install the CPU so that pin 1 on
the CPU aligns with pin 1 of the CPT socket as shown in Figure 7-5. The diagonal notch on
the CPU represents pin 1.
294
Flat edge screwdriver
Chapter 7