E8257D/67D, E8663D PSG Signal Generators Service Guide 297
Assembly Replacement
A18 CPU
A18 CPU
Tools Required
— T–10 driver (E8267D only)
Removal Procedure
Refer to Figure 3-23 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 front panel facing you.
4. Using the T–10 driver, remove the four screws from the Baseband
Generator cover
(E8267D Only).
5. Disconnect the following ribbon cables:
— W19 from A18J2
— W66 from A18P2 (E8267D only)
— W18 from A18J1
— W64 from A14J13 (E8267D only)
— W90 from A14J21 (E8267D only)
6. Lift the retention levers and disconnect the A18 CPU from the A31
Motherboard.
7. Lift the A18 CPU out of the slot.
Replacement Procedure
1. To Install the CPU, reverse the order of the removal procedure.
2. Perform the post–repair CPU Configuration process.
3. Perform theA18 CPU post–repair adjustments and performance tests.
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