LG KP175 - Page 59

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4. TROUBLE SHOOTING
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Only for training and service purposes
CHECKING FLOW
START
Is the connection of
FPCB with connector on
PCB(CN301) ok
?
YE
S
NO
Reassemble FPCB with CN301 connector
Is Voltage pin8 of U300 2.8V?
NO
Replace U300
Check the soldering of
CN301
?
NO
YE
S
YES
Check the soldering of
LCD Line ?
Resoldering CN301
NO
Resoldering FL304,FL305
Does LCD work
properly
?
NO
Replace LCD module
YES
LCD working well !
YES