VARILITE VL4 - Yoke Termination Board Removal and Replacement

3-72
V
ARI
*L
ITE
®
-
VL4
W
ASH
L
UMINAIRE
S
ERVICE
M
ANUAL
CONFIDENTIAL 02.9628.0010
7-Oct-97
3.3.4.4 Yoke Termination Board Removal and Replacement
Parts
:
1 EA PCB ASSY, VL4 YOKE CABLE TERM (YTB)
(24.9628.0049)
Tools
:
Screwdriver, Phillips #1
Screwdriver, Phillips #2
To remove and replace yoke termination board:
Step 1. Remove power to luminaires.
Step 2. Remove 12, 6-32x5/16"PPB screws that secure head covers to
rails and remove both head covers (
Figure 3-1
).
Step 3. At yoke termination board, disconnect all connectors.
a. 4-pin connector from AMBER header marked YTB-P9.
b. 8-pin connector from AMBER header marked YTB-P8.
c. 4-pin connector from BLUE header marked YTB-P7.
d. 8-pin connector from BLUE header marked YTB-P6.
e. 4-pin connector from MAG header marked YTB-P11.
f. 8-pin connector from MAG header marked YTB-P10.
g. 4-pin connector from DOUSER header marked YTB-P5.
h. 5-pin connector from TILT header marked YTB-P3.
j. 4-pin connector from TILT header marked YTB-P4.
k. 4-pin connector from DIM header marked YTB-P13.
m. 8-pin connector from DIM header marked YTB-P12.
n. 4-pin connector from DIFF header marked YTB-P15.
o. 8-pin connector from DIFF header marked YTB-P14.
p. 8-pin connector from FOCUS header marked TB-P16.
Step 4. Remove yoke termination board.
a. At left and right sides of yoke termination board, remove
four 6-32x5/16"PPB screws that secure board to side rails
(
Figure 3-22
).
b. Pull out yoke termination board.
Note
: Cables should only come out of side rail approximately 1 to 1-1/2".
c. At left of board, disconnect two 26-pin black connectors of
yoke cable assembly and remove board.