7-20 Keysight N5264A Service Guide
Repair and Replacement Procedures
Removing and Replacing the A15 Midplane Board
7-
Removing and Replacing the A15 Midplane Board
Tools Required
— T-10 TORX driver (set to 9 in-lb)
— T-20 TORX driver (set to 21 in-lb)
— ESD grounding wrist strap
Removal Procedure
Refer to
for this procedure.
1.
Disconnect the power cord.
2.
Remove the outer and inner covers. Refer to
.
3.
Remove the A16 power supply assembly. Refer to
Replacing the A16 Power Supply Assembly” on page 7-22
4.
Remove the A17 CPU board assembly. Refer to
the A17 CPU Board Assembly” on page 7-24
5.
Remove six screws (item
①
) from the A15 midplane board.
6.
Lift the board ejectors (item
➁
) to the upright position to disengage the
A15 midplane board from the A14 system motherboard.
7.
Note the positions of the five rubber grommets (item
③
) on the bottom
three A15 midplane board alignment pins. Remove these rubber
grommets and retain them for reinstallation on the new A15 midplane
board.
8.
Lift the A15 midplane board out of the measurement receiver.
Replacement Procedure
1.
Reverse the order of the removal procedure.
Be careful to align the guide pins on the A15 midplane board connectors
with the slots on the A14 system motherboard connectors.
The board ejectors should be in the upright position when installing the
A15 midplane board. Align these ejectors with the slots in the chassis
inner panels as the board is lowered into position and then push them
down flat.
Remember to install the five rubber grommets on the bottom three
alignment pins: one on the alignment pin closest to the fans and two each
on the other two alignment pins.
2.
Perform the post-repair adjustments, verifications, and performance tests
that pertain to this removal procedure. Refer to