Photo Senser Trouble - LG KF350 Service Manual

4. TROUBLE SHOOTING

4.11 Photo senser trouble

Check Points
- photo senser soldering`
- FPCB_Folder Crack
2V9_VFM
U100 APDS-9005-020
1
VCC OUT
2
NC1 NC4
3
NC2 NC3
LGE Internal Use Only
6
PHOTO_ADC_IN
5
C101
DNI
4
START
Pin1 of photo senser(U100)
is high(2.9v)?
Yes
Pin6 of U100 is
high?
Yes
FPCB is Crack?
Yes
Replace FPCB_Folder and
Assemble
CHARGE PUMP
C111 1u
B1
AUDIO_IN
AUDIO_IN
D2
LED1 RGB1
E2
LED2 RGB2
C2
LED3 RGB3
C1
LED4 CURR41
E1
LED5 CURR42
D1
LED6 CURR43
C117
1V8_CAM
1u
E6
V2_5
A2
VANA_GPI
C118
A1
2.2u PHOTO_ADC_IN GPIO
Check Fpcb_folder
No
and replace
No Resolder or
Replace photo
senser
No Check and Replace
charge pump.
(U101)
U100(Photo senser)
Copyright © 2008 LG Electronics. Inc. All right reserved.
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B5
DCDC_GATE
C6
DCDC_SNS
D6
C112
DCDC_FB C113
1u
1u
C4
VBAT
B4
C2_P
A3
C115
C2_N
A4
1u
C1_P
B3
C1_N
U101 B2
VSS_CP
AS3675 A5
CP_OUT MLED
C5
CURR30 MLED1
D4
CURR31 MLED2 C116
E3
CURR32 MLED3 2.2u
D3
CURR33 MLED4
E5
CURR1 MLED5
D5
CURR2
E4
CURR6
B6
CLK SCL
A6
DATA SDA
Only for training and service purposes
VBAT