7-18 Keysight N5221A/22A Service Guide
Repair and Replacement Procedures
Removing and Replacing the A14 System Motherboard
7-
Removing and Replacing the A14 System Motherboard
Tools Required
— T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)
— T-20 TORX driver (torque to 21 in-lb or 2.38N.m)
— 5/16 inch open-end torque wrench (torque to 10 in-lb or 1.13 N.m)
— ESD grounding wrist strap
Removal Procedure
Refer to Figure 7-7 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 front panel assembly. Refer to “Removing and Replacing the
Front Panel Assembly” on page 7-8.
4. Remove the A18 GPIB board. Refer to “Removing and Replacing the A18
GPIB Board” on page 7-27.
5. Remove the A15 midplane board. Refer to “Removing and Replacing the
A15 Midplane Board” on page 7-21.
6. Remove the A4–A13 boards. Refer to “Removing and Replacing the A4–
A13 Boards” on page 7-15.
7. Remove the fan bracket and fans. Refer to “Removing and Replacing the
Fans” on page 7-56.
8. Turn the analyzer over so that the bottom side is up and remove four
screws (item
①), that secure the bottom of the midplane bracket to the
chassis.
9. Turn the analyzer back over so that the top side is up. Remove seven
screws (item
➁) that secure the left side bracket to the chassis left inner
panel.
10.Remove two screws (item
③) from each side that secure the midplane
bracket to the chassis left and right inner panels. Lift the midplane bracket
out of the analyzer.
11.Remove three screws (item
④) that secure the A14 system motherboard
to the chassis.
12.Slide the A14 system motherboard toward the rear of the analyzer to
release it from the 15 keyhole standoffs (item
⑤) on the chassis.
13.Lift the A14 system motherboard just enough to unplug the ribbon cable
from the bottom side, then lift it out of the analyzer.
To Next Page
Loading...
