Removing And Replacing The A20 If Multiplexer Board - Keysight N5264A Service Manual

Repair and Replacement Procedures

Removing and Replacing the A20 IF Multiplexer Board

Removing and Replacing the A20 IF Multiplexer Board
Tools Required
— T-10 TORX driver (set to 9 in-lb)
— T-20 TORX driver (set to 21 in-lb)
— ESD grounding wrist strap
Removal Procedure
Refer to
1. Disconnect the power cord.
2. Remove the outer cover. Refer to
3. Position the measurement receiver bottom side up.
4. Remove the A19 test set motherboard. Refer to
5. Disconnect the ribbon cable (item
6. Disconnect ALL gray flexible RF cables (item
7. Remove connector hardware (item
8. Remove connector hardware (item
9. Remove four screws (item
10.Remove four screws (item
11.Slide the A20 IF multiplexer board toward the front of the instrument until
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
7-30
Figure 7-14
for this procedure.
the A19 Test Set Motherboard" on page
multiplexer board.
connector.
stabilizer bracket.
the rear panel connectors are free of the rear panel, then lift the
motherboard and remove it from the measurement receiver.
Attach the stabilizer bracket to the new A20 IF multiplexer board using the
screws removed from the old one.
Torque rear panel RF connector nuts to 21 in-lbs and PULSE I/O connector
screws to 6 in-lbs.
that pertain to this removal procedure. Refer to
"Removing the Covers" on page
"Removing and Replacing
7-28.
①
) from the A20 IF multiplexer board.
➁
) from the A20 IF
③
) from five rear panel RF connectors.
④
) from the rear panel PULSE I/O
⑤
) from the stabilizer bracket and remove the
⑥
) from the A20 IF multiplexer board.
Table 7-2 on page
Keysight N5264A Service Guide
7-5.
7-42.