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3-28
V
ARI
*L
ITE®
-
VL4
W
ASH
L
UMINAIRE
S
ERVICE
M
ANUAL
CONFIDENTIAL
02.9628.0010
7-Oct-97
3.2.2.8
Diffuser Not Working Properly
Step 1.
At yoke termination board, check connections. Ensure all
connectors are properly and securely connected.
Step 2.
Replace UCB. Refer to Low Voltage Supply and Universal
Control PCB Removal and Replacement paragraph.
Step 3.
Remove diffuser mechanism. Refer to Diffuser Mechanism
Removal and Replacement paragraph.
a. Check for broken or damaged panels. Replace diffuser
mechanism as needed or refer to Diffuser Panel Emergency
Fix paragraph.
b. Check for loose or damaged belt. Replace diffuser
mechanism as needed.
Step 4.
Replace diffuser assembly sensor. Refer to Diffuser Sensor
Removal and Replacement paragraph.
Step 5.
Replace diffuser mechanism motor. Refer to Diffuser Motor
Removal and Replacement paragraph.
Step 6.
Replace UCB. Refer to Low Voltage Supply and Universal
Control PCB Removal and Replacement paragraph.
3.2.2.9
Magenta Filters Not Working Properly
Step 1.
At yoke termination board, check connections. Ensure all
connectors are properly and securely connected.
a. One 4-pin connector at header marked YTB-P11.
b. One 8-pin connector at header marked YTB-P10.
c. Two 26-pin black yoke cable connectors at 26-pin headers.
Step 2.
At yoke termination board, swap magenta connectors with
another color and see if symptom occurs with other filters.
Step 3.
Replace UCB. Refer to Low Voltage Supply and Universal
Control PCB Removal and Replacement paragraph.
Step 4.
Remove Dimmer/Filter/Douser assembly. Refer to
Dimmer/Filter/Douser Assembly Removal and Replacement
paragraph.
a. Inspect worm wheel. Ensure that wheel is not damaged and
that it is securely attached to motor shaft. Replace worm
wheel as needed. Refer to Magenta Motor Worm Wheel
and Spur Gear Removal and Replacement paragraph.