LG KE520 Service Manual page 85

4. TROUBLE SHOOTING
4.7.1 Check Point #1 - Slide key PCB
FLASH_EN
LCD_BL_EN
LGE Internal Use Only
< U104 Connection of Slide key PCB >
C106
C107
1u 1u
VBAT
4
VIN VOUT_FL
C109 VOUT_BL
2.2u
9
GND
17
PGND
R121 1.5K
16
EN_FLSH
R122 330 10
EN_SET
U101
R124
AAT2805IXN-4.5-T1
R125
10K
10K
CHARGE PUMP
3LED(60mA) + FLASH(300mA)
- 86 -
C108
1u
FB100
3
13
FB101
8
D1
7
D2
6
D3
5
D4
C110 C111 C112 C113
27p 1u 1u 27p
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Charge
pump IC
(Control
Flash LED)
FPCB
Connector
<CN101,CN100>
FLASH_LED
MLED
LED_CA1
LED_CA2
LED_CA3