Checking The Back Light Unit - NEC AccuSync LCD51VM Series Service Manual
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Also See for AccuSync LCD51VM Series:
- User manual (98 pages) ,
- Dimensional drawing (1 page) ,
- Service manual (129 pages)
Table of Contents
3. Checking the Back Light Unit
Check 5V voltage provided on
Smart Power BD CN21 pin 2
and pin 3.
NG
OK
Check the ON/OFF signal of
equal "H" at CN51 pin 6 on
Smart Power BD?
NG
OK
Is 12V voltage provided from
Smart Power BD ?
Check F101 open.
NG
OK
Failure point
Inverter Area of Smart
Power BD failure.
Smart power BD: Combined board of power and inverter circuits.
Failure point
Power Area of Smart
Power Board failure.
1. U405 failure (Main BD)
2. Printed wire or parts broke between U405 pin 41 to CN51 pin 6.
Failure point
F101 failure.
6-5
Failure point
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