Keysight Technologies N5247B, Service Manual

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7-84 Keysight N5247B Service Guide
Repair and Replacement Procedures
Removing and Replacing the Rear Panel
7-
Removing and Replacing the Rear Panel
Tools Required
— T-10 TORX driver (set to 9 in-lb)
— T-20 TORX driver (set to 21 in-lb)
— 5/16 inch nutsetter (set to 10 in-lb)
— 5/16 inch nutsetter (set to 21 in-lb)
— 5/8 inch nutsetter (set to 21 in-lb)
— 9/32 inch nutsetter (set to 9 in-lb)
— 3/16 inch nutsetter (set to 6 in-lb)
— 9/16 inch nutsetter (set to 21 in-lb)
— 9 mm nutsetter (set to 21 in-lb)
— ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-47 for this procedure.
1. Disconnect the power cord.
2. Remove the outer and inner covers. Refer to “Removing the Covers” on
page 7-6 .
3. Remove the A20 power supply assembly. Refer to “Removing and
Replacing the A20 Power Supply Assembly” on page 7-26 .
4. Remove the A21 CPU board assembly. Refer to “Removing and Replacing
the A21 CPU Board Assembly” on page 7-28 .
5. If installed, remove all jumper cables (item

) from the rear panel.
6. Remove the 50 ohm load(s) (item

).
7. If installed, remove the cap (item

).
8. Remove the connector hardware (item

) from each of the five multi-pin
connectors. The hardware is not the same on each connector so note
which hardware goes with which connector.
9. Remove the connector hardware (item

) from each of the RF
connectors. The hardware is not the same on each connector so note
which hardware goes with which connector.
10. Remove the 13 screws (item

) that attach the rear panel to the chassis.
11. Slide the rear panel over the cable connectors and off of the analyzer.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Perform the post-repair adjustments, verifications, and performance tests
that pertain to this removal procedure. Refer to Table 7-2 on page 7-92 .