E8257D/67D, E8663D PSG Signal Generators Service Guide
Assembly Replacement
Rear Panel (Option 1EM)
3-97
• W67 (.25–3.2 GHz COH CARRIER) from Rear Panel
• W73 from AT1 115 dB High–Power Mechanical Attenuator
• (1 GHz Out) from the Rear Panel
10. Disconnect the following ribbon cables:
• W64 from A17P2 (E8267D only)
• W90 from A17P1 (E8267D only)
• W20 from A20 SMI J1
• W18 from A21 Rear Panel Interface J3
• W23 from A21 Rear Panel Interface J2
• W136 from A40 Compact Flash PCA (if Option 008/009 is installed)
11. If the signal generator has option UNR/UNX, disconnect the W48 flexible cable from A32 10 MHz Crystal Oscillator
(Option UNR/UNX).
12. Using the T–10 driver, remove the two screws (1) that secure the Rear Panel to the left and right struts.
13. Using the T–10 driver, remove the four screws (2) that attach the rear panel to the frame.
14. Using the T–10 driver, remove the two screws (3) that secure the Rear Panel to the left and right struts.
15. Using the T–10 driver, remove the screw securing the A22W2 to the A19 Power Supply.
16. Disconnect the B1 Fan cable from the A31 Motherboard P251.
17. Pull the rear panel away from the signal generator’s chassis.
Replacement Procedure
• Reverse the order of the removal procedure.
• Torque all T–10 screws to 9 in–lbs.
• Torque all RF connectors to 8 in–lbs.
• Perform the post–repair adjustments and performance tests that pertain to this removal procedure.
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