A21 Rear-Panel Interface; Tools Required; Removal Procedure; Replacement Procedure - Keysight Technologies E8257D Service Manual

Assembly Replacement
A21 Rear–Panel Interface
A21 Rear–Panel Interface

Tools Required

— T–10 driver
— 9/16" hex–nut driver
— 5.0 mm hex–nut driver
— 7.0 mm hex–nut driver
— needle–nose pliers

Removal Procedure

Refer to
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to
3. Remove the rear panel. Refer to
4. Using the 9/16" hex–nut driver, remove the nuts and washers securing the
5. Using the 5.0 mm hex–nut driver, remove the screws (2) from the RS–232
6. Using the 7.0 mm hex–nut driver, remove the screws (3) from the GPIB
7. Using the T–10 driver, remove the two screws (4) from the bottom of the
8. Disconnect the B1 Fan cable (5) from A31P251.
9. If you have Option UNR/UNX, disconnect the A32 10 MHz Crystal
10.Remove the A21 Rear Panel Interface.

Replacement Procedure

1. Reverse the order of the removal procedure.
2. Torque all T–10 screws to 9 in–lbs.
3. Torque all hex–nuts to 9 in–lbs.
4. Torque all BNC nuts to 21 in–lbs.
306
Figure 3-27 for this procedure.
Cover" on page 258 and
"Rear Panel (Option 1EM)" on page
six BNC
connectors (1) at the base of the rear panel.
port.
port.
A21 Rear Panel Interface.
Oscillator (Option UNR/UNX) cable from A21P2.
E8257D/67D, E8663D PSG Signal Generators Service Guide
"Inner Instrument Cover" on page
"Rear Panel (Standard)" on page 360
363.
"Outer Instrument
260.
or