Camera Flash Trouble - LG U8290 Service Manual

4.20 Camera Flash Trouble

Camera Flash is worked as below :
PM6650 control the camera flash in Folder Assy → PM6650 Port 8(FLSH_DRV_N) →
CN300(Flash_On) → CN2(Flash_On) → CN1 → LCD Module → FLASH LED FPCB Module
Start
Check t he Flash FPCB
Module in folde r Assy
VREG_5V of FPCB is
higher t han 3.3V?
VREG_5V is 5V o n Key PCB?
FLAS H_ON of C N1
pin 17 is 0V?
FLASH_ON of CN300
pin 22 is 0V?
Change the Main boa rd
NO
Reso ld er the FPCB
Yes
NO
Yes
Change the FPCB
NO
Yes
or Change the Key pc b
NO
Yes
Check t he CN2
or Change the Key pc b
NO
Yes
Check t he CN300
Yes
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4. TROUBLE SHOOTING
Yes
Work w ell?
Work w ell?
Check t he
CN1, CN2
End