Installation guide

Assembly Replacement
A4 Inverter
2-16
A4 Inverter
Tools Required
• T-10 driver
WARNING High voltage is present at the A4 Inverter output (CN2-1). Also, be careful of the fan
blades on B1, B2, and B3. Keep hands and fingers away from the fan blades to avoid
injury!
Removal Procedure
Refer to Figure 2-8 for this procedure.
1. Disconnect the power cord.
2. Remove the front panel. Refer to “Front Panel” on page 2-6.
3. Disconnect the W1 cable (2), of the A2DS1 Display Backlight, from the A4 Inverter.
4. Disconnect the W34 cable (1) from the A4 Inverter.
CAUTION The A4 Inverter is fragile and can be damaged when pulled away from the velcro attachment.
5. Remove the A4 Inverter from the A3 Front Panel Auxilary Board by pulling it away from the printed
circuit board. The A4 Inverter is attached with velcro; there are no additional hardware attachments.
Replacement Procedure
1. Reverse the order of the removal procedure.
2. Torque all T-10 screws to 9 in-lbs.
3. Perform the post-repair adjustments and performance tests that pertain to this removal procedure.