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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.11 Touch Screen trouble
Touch Initial sequence of KF700 is :
VREG_LDO_TOUCH_2.8V(C102) goes to 2.8V
→
TOUCH_PENIRQ_N(C104),
TOUCH_I2C_SCL(R304) & TOUCH_I2C_SDA(R305) go to high.
Touch operation of KF700 is :
A finger is touching on the screen
→
TOUCH_PENIRQ_N is low
→
I2C is connected
→
A finger is
took off from the Screen
→
TOUCH_PENIRQ_N is high
→
I2C is not connected.
Summary of Contents for KF700
Page 1: ...Service Manual Model KF700 Service Manual KF700 Date May 2008 Issue 1 1 Internal Use Only ...
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