C
HAPTER
3. M
AINTENANCE
P
ROCEDURES
3-99
02.9631.0010
CONFIDENTIAL
15 Jan 98
3.3.13 Voltage Selector Board Removal and Replacement
Parts:
1 EA
PCB ASSY, AC VOLTAGE SELECTOR (VSB)
(24.9620.0077)
Tools:
Screwdriver, Phillips #1
Screwdriver, Phillips #2
To remove and replace voltage selector board (Figure 3-31):
ELECTRONIC
CHASSIS
VOLTAGE SELECT
BOARD MOUNT
VOLTAGE SELECT
BOARD
4-40X5/16"PPZ SCREW
6-32X3/8"PPB
SCREW
REMOVE THESE TWO
FUSES TO ACCESS
4-40X5/16"PPZ SCREW
#4 INTERNAL TOOTH
LOCK WASHER
Figure 3-31. Voltage Selector Board Removal and Replacement
Step 1.
Remove power to luminaire.
Step 2.
Open chassis lid.
a. At electronics chassis, remove six 10-32x3/8"PPB screws
that secure chassis lid to chassis and open chassis lid.
Step 3.
Remove voltage selector board.
a. At voltage selector board, disconnect all connectors.
b. From outside of chassis, remove four 6-32x3/8"PPB screws
that secure board mount to chassis and remove board and
mount from chassis.
c. Remove 15A or 10A and 3A fuses closest to 4-
40x5/16"PPZ screws securing board to mount.
d. Remove eight 4-40x5/16"PPZ screws and #4 internal tooth
lock washers that secure board to mount and remove board.
Step 4.
Replace voltage selector board by doing Steps 2 and 3 in
reverse. Verify that board is correctly oriented in mount.