3-2
LCD PART
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.
Vcom Waveform
0.17V
3.72V
68.22
µ
s
3.89V
GND
Summary of Contents for DP270B
Page 15: ...3 6 MEMO ...
Page 17: ...3 9 3 10 PRINTED CIRCUIT DIAGRAM TOP VIEW BOTTOM VIEW MEMO ...
Page 34: ...3 27 2 WIRING CONNECTION DIAGRAM 2 MAIN PCB KEY PCB MAIN PCB Key PCB ...
Page 51: ...3 55 3 56 1 MAIN P C BOARD TOP VIEW PRINTED CIRCUIT DIAGRAMS ...
