Assembly Replacement
Rear Panel
2-40
Rear Panel
Tools Required
• T-10 driver
• needle-nose pliers
Removal Procedure
Refer to Figure 2-19 for this procedure.
1. Disconnect the power cord.
2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-4 and
"Inner Instrument Cover" on page 2-6.
3. Position the signal generator with the A31 Motherboard panel facing you.
4. Using the needle-nose pliers, disconnect the W16 flexible cable (refer to Figure 2-15 on page 2-33) from the A11
Pulse/Analog Modulation Generator J204.
5. Disconnect the W20 ribbon cable from the A20 SMI.
6. Disconnect the W22 flexible cable (10 MHz input) from the A31 Motherboard J1042.
7. Disconnect the W21 flexible cable (10 MHz output) from the A31 Motherboard J1043.
8. Using the T-10 driver, remove the two screws (1) that secure the A21 Rear-Panel Interface to the A19 Power Supply.
9. Disconnect the W18 ribbon cable that connects A21 Rear-Panel Interface J3 to the A18 CPU J1.
10. Disconnect the W23 ribbon cable that connects A21 Rear-Panel Interface J2 to A31 Motherboard P241.
11. Using the T-10 driver, remove the four screws (3) that attach the rear panel to the frame.
12. Using the T-10 driver, remove the two screws (4) that secure the A19 Power Supply to the top rear panel’s left and right
struts.
13. Using the needle-nose pliers, disconnect the A22W1 cable from the A19 Power Supply.
14. If you have Option UNJ, disconnect the W47 flexible cable from A32J1 using the needle-nose pliers. Refer to figure "A32
10 MHz Crystal Oscillator (Option UNJ)" on page 2-72.
15. Pull the rear panel away from the signal generator’s chassis while guiding the A22W1 through the opening of the power
supply.
Replacement Procedure
• Reverse the order of the removal procedure.
• Torque all T-10 screws to 9 in-lbs.
• Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
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