LG E1941S Service Manual page 23

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
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Only for training and service purposes
volt
YES
YES
YES
YES
5. POWER
NO
NO
NO
NO
NO
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Check AC line
Check F901, BD901
Check R908, R911, U901
Check D904, C913
Check D907, Q901
LGE Internal Use Only