NEC AccuSync LCD71VM User Manual

6-5
3. Checking the Back Light Unit
NG
OK
Check 5V voltage provided of
Smart Power BD CN21 pin 2
and pin 3.
Failure point
Failure point
Inverter Area of Smart
Power BD failure.
Failure point
F101 failure.
Check the ON/FF signal of
equal “H” at CN51 pin6 in Smar
t
Power BD?
OK
NG
Failure point
Power Area of Smart
Power Board failure.
Is 12V voltage provided from
Smart Power BD ?
Check F101 open.
OK
NG
Smart power BD: Combined board of power and inverter circuits.
1. U405 failure (Main BD)
2. Printed wire or parts broke between U405 pin 41 to CN51 pin 6.

NEC AccuSync LCD71VM Specifications

General

Brand	NEC
Model	AccuSync LCD71VM
Category	Monitor
Language	English