LG B2050 Service Manual - Page 86
Indication LED only operates in trickle charging mode.
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Checking Flow 4 . TROUBLE SHOOTING Indication LED only operates in trickle charging mode. START Voltage level at 3pin of Q401 Is about 40mV YES Check soldering of R350 YES Replace LD306 NO Voltage level at 2pin of Q401 Is about 680mV YES Resolder Q401 NO Resolder R350 NO Resolder Q301 Voltage level at 2pin of Q301 Is low YES NO Change main board - 85 -
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- 85 -
4 . TROUBLE SHOOTING
Checking Flow
START
Voltage level
at 3pin of Q401
Is about 40mV
Check soldering of
R350
Replace LD306
Resolder R350
Change main board
Resolder Q401
Resolder Q301
Voltage level
at 2pin of Q401
Is about 680mV
Voltage level
at 2pin of Q301
Is low
YES
YES
YES
YES
NO
NO
NO
NO
Indication LED only operates in trickle charging mode.