Service Manual
Wireless 2.4G Tw
Version 1.0
Page 3
1. Keyboard Testing Procedure:
Please check the oscillator by
Oscilloscope.
If the wave diagram is not right, please
replace old with new one.
TEST OK
Please check the voltage and the wave
diagram of U1.
If the wave diagram is different, please
replace U1.
Please check the wave diagram of J2 (RF
2.4G box).
If the wave diagrams are different, replace
J2.
Please check the membrane if there is
still problems on keyboard.
If dust, replace membrane.