Sideview Led Trouble - LG KF350 Service Manual

4.12 sideview LED trouble

Check Points
-Signal path is connected well
LD100 LD101 LD102
LED1 LED2 LED3 LED4
Check All of LEDs solder
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Only for training and service purposes
MLED
LD103 LD104 LD105
LED5 LED6
START
Check TP1 is
hlgh (2.62V)?
Yes
Check TP2 is
high?(2.62v)
Yes
Assemble
- 87 -
4. TROUBLE SHOOTING
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 U101
LED6 CURR43
AS3675
C117
1V8_CAM
1u
E6
V2_5
A2
VANA_GPI
C118
A1
2.2u
PHOTO_ADC_IN GPIO
No Check 22pin
connector and
FPCB Folder
No
Check and Replace
charge pump.
(U101)
Sideview LED
VBAT
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
B2
VSS_CP
A5
MLED
CP_OUT
C5
CURR30 MLED1
D4
CURR31 MLED2 C116
E3
2.2u
CURR32 MLED3
D3
CURR33 MLED4
E5
CURR1 MLED5
D5
CURR2
E4
CURR6
B6
CLK SCL
A6
DATA SDA
LGE Internal Use Only