LG GD510 - Touch Trouble

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5. Trouble shooting
GD510 Operational Description Revision A
LG Electronics 82/113 LGE Property
5.11 Touch trouble
Check Points
- Touch driver IC soldering`
- FPCB_Folder Crack
U403 Solder
check
Touch FPCB is
Crack?
Resolder it
Replace FPCB
Yes
No
No
Check Touch Signal
(If not replace front touch
panel)
)
Yes
Yes
U403
CN803 Solder
check
START
CN803
Replacd Main Board
Yes
EVSC5S04F050
VA401
6 3
42
51 P1 P5
P2 P4
3P
6P
4.7K
R415
C418
1u
C423
100n
VFM_2V9
TSC2007IYZGR
U403
D3B3
D2B2
D1B1
C3A3
C2A2
C1A1
AUX SDA
VDD_REF A1
X+ X-
PENIRQ- SCL
A0 GND
Y+ Y-
TOUCH_INT
I2C_SDA
I2C_SCL
Y-
X-
Y+
X+
Touch IC
KQ13L-4R
CN803
4
3
2
1
Y-
X-
X+
Y+
TOUCH CONNECTOR
ENZY0020701