308 E8257D/67D, E8663D PSG Signal Generators Service Guide
Assembly Replacement
A22 Line Module
A22 Line Module
Tools Required
— T–10 driver
—5.0 mm wrench
— needle–nose pliers
Removal Procedure
Refer to Figure 3-28 for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to “Outer Instrument
Cover” on page 258 and “Inner Instrument Cover” on page 260.
3. Position the signal generator with the rear panel facing you.
4. If the signal generator has Option UNR/UNX, remove the A32 10 MHz
Crystal Oscillator. Refer to “A32 10 MHz Crystal Oscillator” on page 354 to
remove the assembly.
5. Using the T–10 driver, remove the two screws (1) that attach the A22 Line
Module to the rear panel.
6. Using the 5.0 mm wrench, remove the nut (2) and washer from the
grounding screw connecting A22W2 to the rear panel.
7. Using the T–10 driver, remove the screw (3) that attaches the A22W2 to
the bottom of the
A19 Power Supply (E8267D only).
8. Using the needle–nose pliers, disconnect the A22W1 from the bottom of
the A19 Power Supply.
9. Remove the A22 Line Module
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Torque all T–10 screws to 9 in–lbs.
3. Torque all nuts to 9 in–lbs.
4. Perform the post–repair adjustments and performance tests that pertain
to this removal procedure.
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