LG -T300 Service Manual page 82

CHECKING FLOW
START
Is the connection of
LCD FPCB with CN203
connector ok ?
YES
Check the Voltage
Level of MLED1~5(TP1~5) is about
Battery voltage ? (LCD_BL_CTRL
Signal(TP07) is high Level)
YES
Check the Waveform of
EMI filter ?(FL301,
FL302,TP302~TP304)
YES
Does LCD work
properly ?
YES
LCD working well !
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
NO
Reassemble FPCB with Main connector
NO
Resoldering or Replace U302
NO
Resoldering EMI filter.
(FL301,FL302,FL303)
NO
Replace LCD module
- 8 -
4. TROUBLE SHOOTING
4. TROUBLE SHOOTING
LGE Internal Use Only