Touch Trouble - LG GS290 Service Manual

GS290 Operational Description

4.11 Touch trouble

Check Points
- Touch driver IC soldering`
- Touch connector Crack
Touch Connector
CN400
ENZY0020701
1
X+
2
3
X-
4
KQ13L-4R
STAR T
Check T ouch Signal
(If not replace front touch
p anel )
Yes
U400 Solder
check
Yes
CN400 Solder
check
Yes
Replacd Main Board
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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VBT_2V65
C426 C425
1u
0.1u
Y+
TP419
TOUCH_INT
Y-
X+
Y+
X-
Y-
VA410
EVLC14S02050
No
Resolder U400
No
Resolder or Replace
CN400
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4. TROUBLE SHOOTING
Touch IC
U400
TSC2007IYZGR
A1 C1
AUX SDA
A2 C2
VDD_REF A1
A3 C3
X+ X-
B1 D1
PENIRQ- SCL
B2 D2
A0 GND
B3 D3
Y+ Y-
VA409 VA401
VA408
EVLC14S02050
EVLC14S02050
EVLC14S02050
U400
LGE Property
Revision B
I2C_SDA
I2C_SCL
CN400
LGE Internal Use Only