LG KG280 Service Manual - Page 60
Is Voltage pin3 of U103 2.8V?
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4. TROUBLE SHOOTING CHECKING FLOW START Is the connection of NO FPCB with connector on PCB(CN101) ok ? YES NO Is Voltage pin3 of U103 2.8V? YES NO Check the soldering of CN101 ? YES Change the FPCB and try again YES NO Check the soldering of EMI filter ? YES NO Does LCD work properly ? YES LCD working well ! Reassemble FPCB with CN101 connector Replace U103 Resoldering CN101 Resoldering EMI filter(FL101~FL105) Replace LCD module Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes - 61 - LGE Internal Use Only
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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
CHECKING FLOW
START
Is the connection of
FPCB with connector on
PCB(CN101) ok ?
YES
NO
Reassemble FPCB with CN101 connector
Is Voltage pin3 of U103 2.8V?
NO
Replace U103
Check the soldering of
CN101 ?
NO
Change the FPCB and try again
YES
YES
YES
Check the soldering of
EMI filter ?
Resoldering CN101
NO
Resoldering EMI filter(FL101~FL105)
Does LCD work
properly ?
NO
Replace LCD module
YES
LCD working well !
YES