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LG E1941S Service Manual page 23

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No Power
(Power Indicator Off)
Check AC line
Check the
voltage of C907(+)  
Check start
voltage for the pin8
of U901  
Check U901 pin 6
Vcc is 30V?  
Check U901 PIN5
output is PWM?  
Check U901,T901,D901,D906,ZD901,Q904,U902,U903  
Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
volt
YES
YES
YES
YES
 
5. POWER
NO
NO
NO
NO
NO
- 23 -
Check AC line  
Check F901, BD901  
Check R908, R911, U901  
Check D904, C913  
Check D907, Q901  
LGE Internal Use Only

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