2-42
Assembly Replacement
A19 Power Supply
A19 Power Supply
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 2-5
and "Inner Instrument Cover" on page 2-7.
3. Position the signal generator with the A31 Motherboard facing you.
4. Disconnect the W20 ribbon cable from the A20 SMI.
5. Using the T-10 driver, remove the two screws (1) that secure the A19 Power Supply to the struts
located on the bottom.
6. Using the T-10 driver, remove the three additional screws (2) that are attached to the bottom
frame.
7. Using the needle-nose pliers, disconnect A22W1 from the power supply.
8. Using the T-10 driver, remove the screw securing the A22W2 to the A19 Power Supply.
9. Position the signal generator with the A31 Motherboard flat on the work surface and the rear
panel facing you.
10.Disconnect the following ribbon cables:
• W64 from A14J13 (E8267C only)
• W90 from A14J21 (E8267C only)
• W66 from A18 CPU P2
• W18 from A18 CPU J1
11.Using the T-10 driver, remove the two screws (3) that secure the A19 Power Supply to the struts
located on the top and an additional screw (4) located on the top frame.
12.Move W20 to the side and remove the A19 Power Supply from the signal generator’s chassis.
13.Remove the screw that attaches the A34 Internal Hard Drive to the A19 Power Supply
(E8267C only).
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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