2-48
Assembly Replacement
Rear Panel (Option 1EM)
• W56 (-Q OUT) from A35 3-20 GHz I/Q Modulator J14 (E8267C only)
• W57 (-I OUT) from A35 3-20 GHz I/Q Modulator J13 (E8267C only)
• W58 (Q OUT) from A35 3-20 GHz I/Q Modulator J12 (E8267C only)
• W59 (I OUT) from A35 3-20 GHz I/Q Modulator J11 (E8267C only)
• W50 (Q IN) from A35 3-20 GHz I/Q Modulator J8 (E8267C only)
• W49 (I IN) from A35 3-20 GHz I/Q Modulator J7 (E8267C only)
• W65 (BASEBAND GEN REF IN) from A14 Baseband Generator Board J800 (E8267C only)
9. Using the 5/16” open ended wrench, disconnect the following RF cables
• W67 (.25-3.2 GHz COH CARRIER) from Rear Panel
• W73 from AT1 115 dB High-Power Mechanical Attenuator
10.Disconnect the following ribbon cables:
• W64 from A17P2 (E8267C only)
• W90 from A17P1 (E8267C only)
• W20 from A20 SMI J1
• W18 from A21Rear-Panel Interface J3
• W23 from A21Rear-Panel Interface J2
11.If the signal generator has option UNR, disconnect the W48 flexible cable from A32 10 MHz
Crystal Oscillator (Option UNR).
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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