2-87
Assembly Replacement
A31 Motherboard (E8267C)
8. Using the needle-nose pliers, disconnect the W68 wire cable from A31J250
9. Disconnect the W23 ribbon cable from the A21 Rear Panel Interface while removing the
A31 Motherboard from the chassis.
10. Disconnect the W35 ribbon cable (not shown in Figure 2-42) from the A26 MID J10.
11.Using the T-10 driver, remove the 15 screws (1) that hold the A31 Motherboard to the chassis.
Replacement Procedure
• Reverse the order of the removal procedure.
• Send command "DIAG:FILE:BACK", this copies data to the Motherboard.
• Torque all T-10 screws to 9 in-lbs.
• Torque all RF connectors to 8 in-lbs.
• Perform the post-repair adjustments and performance tests that pertain to this removal
procedure.
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