204 Chapter 4
Assembly Replacement
A22 Processor Assembly
Replacement
1. Secure the A22A1 DRAM and A22A2 Flash assemblies onto the new
processor board. Refer to the “A22A1 DRAM, A22A2 Flash, and
A22A3 GP-IB Capacitor Boards” replacement procedure. The A22A3
GP-IB capacitor board is not required on the new processor board.
Discard the A22A3 capacitor board.
2. Slide the A22 processor assembly into the deck. Keep the assembly
flat as you slide it into the deck to avoid damage. Fully engage the
connectors by pushing on the CPU dress panel.
3. Refer to Figure 4-22. Using the T-10 driver, secure the assembly to
the rear frame with the 14 screws (1). Torque to 9 inch pounds.
4. Replace the A25 board. Refer to the “A25 SCSI Board” replacement
procedure.
5. Replace the A10 assembly. Refer to the “A10 Digital IF and A12
Analog IF Assemblies” replacement procedure.
6. Replace the A7 assembly (if installed). Refer to the “A7 Baseband I/Q
Assembly (Option B7C)” replacement procedure.
7. Replace the instrument top brace. Refer to the “Top Brace”
replacement procedure.
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