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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
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
_WVXZZ
4. TROUBLE SHOOTING
CIRCUIT
Test point
TP2
TP1
VBAT
444R
smhoK001
1uF
C425
1V8_VDD
C426
2.2u
C427
27pF
100ohms
R445
VA415
FL403
0
1
5
64
73
82
91
INOUT_A1 INOUT_B1
INOUT_A2 INOUT_B2
INOUT_A3 INOUT_B3
INOUT_A4 INOUT_B4
1
G
2G
VMMC
C428
1uF
TP402
TP403
TP404
TP405
VA416
100ohms
R446
CN403
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0.001uF
C429
FL404
01
5
64
73
82
91
INOUT_A1 INOUT_B1
INOUT_A2 INOUT_B2
INOUT_A3 INOUT_B3
INOUT_A4 INOUT_B4
1G
2G
C430
0.001uF
FL405
01
5
64
73
82
91
INOUT_A1 INOUT_B1
INOUT_A2 INOUT_B2
INOUT_A3 INOUT_B3
INOUT_A4 INOUT_B4
1G
2G
LCD_RS
NLCD_MAIN_CS
LCD_DATA00
LCD_DATA01
LCD_DATA02
LCD_DATA03
LCD_DATA04
LCD_DATA05
LCD_DATA06
LCD_DATA07
LCD_VSYNC
NLCD_WR
_LCD_RESET
LCD_ID
MLED5
MLED4
MLED3
MLED2
MLED1
MAKER ID : LOW
LCD CONNECTOR
1u
C401
1u
C402
R427
100K
0.1u
C418
2.2u
C419
1u
C433
C420
1u
1V8_HPVDD
2.2u
C421 C422
2.2u
VBAT
324C
u
1
424C
u1
U402
24
23
22
21
20
19
18
8
7
6
5
9
4
10
3
11
2
12
1
31
4
1
51
61
7
1
LCS
ADS
NE
MWP
FC
DNGP
LDO1
N2C
LDO2
N1C
LDO3
P1
C
LDO4
P2C
AGND
VIN
LDOIN
LED6
LED5
LED4
LED3
LED2
LED1
VOUT
1V8_VDD
K
0
1
344R
CAM_A_2V8
CAM_D_1V5
CAM_IO_1V8
I2C_SCL
I2C_SDA
LCD_BL_CTRL
MLED5
MLED4
MLED3
MLED2
MLED1
TP3
TP3