Lcd Part - LG DP271, DP271B, LPA-837 Service Manual

1) Power measuring
Measure each power after power supply.
C902(-) : -10V, C901(+) : +15V, C916(+) : +7.5V, C918(+) : +5VD, C914 : 3.3V
2) VCOM waveform adjustment
Adjust the VCOM level while changing the VR901 as below waveform by using the scope in the
C921.
GND

LCD PART

3.72V
0.17V
68.22µs
3.89V
Vcom Waveform
3-2