Only For Training And Service Purposes - LG KP175 Service Manual

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

Only for training and service purposes