LG GT350 - LCD Display Trouble

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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
LG Electronics 67/115 LGE Property
4.4 LCD display trouble
Check Points
-LCD assembly status ( LCD FPCB, Connector on FPCB)
-EMI filter soldering
-Connector combination
Charge Pump
Check signal flow via EMI filter
Check the connection LCD FPCB
Connector
1
0
4C
p
9
3
p
722
0
4C
p723
0
4C
p93504C
p7
28
04
C
p72904C p72414C p7
25
14
C
p72614C p72714C
25pF
ICVE10054E250R201FRFL401
01
5
64
73
82
91
INOUT_A1 INOUT_B1
INOUT_A2 INOUT_B2
INOUT_A3 INOUT_B3
INOUT_A4 INOUT_B4
1
G
2G
K01
5
04
R
GB042-40S-H10-E3000
ENBY0036001
CN403
2120
2219
2318
2417
2516
2615
2714
2813
2912
3011
3110
329
338
347
356
365
374
383
392
401
25pF
ICVE10054E250R201FRFL402
01
5
64
73
82
91
INOUT_A1 INOUT_B1
INOUT_A2 INOUT_B2
INOUT_A3 INOUT_B3
INOUT_A4 INOUT_B4
1G
2G
25pF
ICVE10054E250R201FRFL403
01
5
64
73
82
91
INOUT_A1 INOUT_B1
INOUT_A2 INOUT_B2
INOUT_A3 INOUT_B3
INOUT_A4 INOUT_B4
1G 2G
VBAT
LCD_ID
DIF_VSYNC
DIF_D7
DIF_D6
DIF_D5
DIF_D4
DIF_D3
DIF_D2
DIF_D1
DIF_D0
DIF_CD
DIF_RD
DIF_CS
DIF_WR
DIF_RESET
KEY_COL3
2V62_VIO
RCV_SPK_N
KEY_ROW6
LCD_BACKLIGHT_E
N
RCV_SPK_P
KEY_COL4
KEY_COL5
X-
Y-
X+
Y+
IF_MODE0
SLIDE_KEY_BL
Socket
MAIN To FPCB Connector