E8257D/67D, E8663D PSG Signal Generators Service Guide 345Assembly ReplacementA30 Modulation Filter (Standard and Option 1EA/1EU)A30 Modulation Filter (Standard and Option 1EA/1EU)Tools Required— T–10 driver— 5/16” open–ended wrenchRemoval ProcedureRefer to Figure 3-52 for this procedure.1. Disconnect the power cord.2. Remove the covers from the signal generator. Refer to “Outer InstrumentCover” on page 258 and “Inner Instrument Cover” on page 260.3. Position the signal generator with the A31 Motherboard facing away fromyou and the RF deck on top.4. Disconnect the following flexible cables:— W17 from A30J7— W108 from A30J6 (Options (550 and 567 only)5. Using the 5/16” open–ended wrench, disconnect the following RF cableaccording to the signal generator you have.E8257D/E8663D: Disconnect the W41 RF cable from A30J1.E8267D: Disconnect the W98 RF cable from A30J1.6. Disconnect the W34 ribbon cable from the A30 Modulator Filter.7. Using the 5/16” open–ended wrench, disconnect the following RF cableaccording to the signal generator you have.Option 513, 520, & 521 Standard: Disconnect the W74 RF cable fromA30J2.Option 540 Standard: Disconnect the W31 RF cable from A30J2.Option 550/567 Standard: Disconnect the W107 RF cable from A30J2.Option 1EM: Disconnect the W71 RF cable from A30J2.8. Using the 5/16’ open–ended wrench, disconnect the following RF cables:— W27 from A30J3— W32 from A30J4— W106 from A30J4 (Option 550/567 only)9. Using the T–10 driver, remove the three screws (1) that attach the A30Modulator Filter to the RF bracket.
