E8257D/67D, E8663D PSG Signal Generators Service Guide 349
Assembly Replacement
A31 Motherboard (E8257D & E8663D)
8. Using needle-nose pliers, disconnect W138 from the A31 Motherboard.
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 from the A26 MID J10.
11.Disconnect the W135 cable from A31P242 (Option 521 only).
12.Using the T–10 driver, remove the 15 screws (1) that hold the A31
Motherboard to the chassis.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Send command: DIAG:FILE:BACK, this copies data to the Motherboard.
3. Torque all T–10 screws to 9 in–lbs.
4. Torque all RF connectors to 8 in–lbs.
5. Perform the post–repair adjustments and performance tests that pertain
to this removal procedure.
To Next Page
Loading...
Need help?
General
