A25B Highband Detector Bias Board; Tools Required; Removal Procedure; Replacement Procedure - Keysight Technologies E8257D Service Manual

Assembly Replacement

A25B Highband Detector Bias Board

A25B Highband Detector Bias Board

Tools Required

— T–10 driver

Removal Procedure

Refer to
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to
3. Position the signal generator with the A31 Motherboard facing away from
4. Disconnect the A25BW1 bias board power cable from the A26 MID J12.
5. Using the T–10 driver, remove the two screws (1) that attach the A25B
6. Remove the A25B Highband Detector Bias Board.

Replacement Procedure

— Reverse the order of the removal procedure.
— Torque all T–10 screws to 9 in–lbs.
— Perform the post–repair adjustments and performance tests that pertain to
332
Figure 3-45 for this procedure.
Cover" on page 258 and
you and the RF deck on top.
Highband Detector Bias Board to the A24 Highband Coupler.
this removal procedure.
E8257D/67D, E8663D PSG Signal Generators Service Guide
"Inner Instrument Cover" on page
"Outer Instrument
260.