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a. R175 (GP19_TSC_PWR_EN) shall be high (2.8V).
b. R49 (TSC_PWR) shall be high (2.8V).
c. Pin#1 of R84 shall be high (2.8V).
d. The signals TSC_XP (T50); TSC_XM (T51); TSC_YP (T52); TSC_YM (T53) shall have
voltage change when different location of touch panel is pressed and the pin#2 of R90
(GP134_TSC_IRQ#) shall have interruption signal (low pulse), then pin#4 of RN1 (I2C_SCL)
and Pin#2 of RN1 (I2C_SDA) shall have read access timing output.
GTC
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Service Manual
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