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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
4.18 Side Key Troubleshooting
There are 2 main Key, Volume and Camera Key, which is connected to Sub-PCB.
Volume Key consists of Volume up and Volume down. Also, Camera Key is composed of Focus and Shutter.
Start
Check Sub-PCB
NO
Yes
Key press
Check R211 and R212
NO
TP1 or TP2 is
High?
4. Troubleshooting
(BB)
TP3 or TP4 is
High?
Yes
Check an U200 or
Change the Main board
And Retest
155P
24
23
22
21
20
19
18
17
16
15
14
13
470
R211
470
R212
470
R213
470
R214
56K
51
2
R
56K
61
2
R
VREG_MSMP_2.6V
LCD_CVT_INT
LCD_CVT_RESET_N
KEY_ROW[0]
KEY_ROW[1]
KEY_COL[0]
KEY_COL[1]
LIN_MOTOR_EN
LCD_CVT_VSYNC
MDDI_P_STB_M
PM_ON_SW
TP4 TP
TP2
TP1
Содержание GD88O
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