V-Com Level Adjustment (Type 2, 3 Model) - Sony CCD-TRV32 Service Manual

21-6.

V-COM level adjustment (Type 2, 3 MODEL)

Purpose : Set to contrast of the image.
Adjustment Error : Image will be blue (whitish) or saturated.
Mode STOP or Playback
Signal Color bar signal with chroma and
burst signals turned OFF
〈CN1804〉 pin 8 (COM-O)
Measurement point
Measuring equipment Oscilloscope
Adjustment page F
Adjustment address E1
Type 2 : A=6.60 ± 0.05Vp-p
Specification
Type 3 : A=6.85 ± 0.05Vp-p
Adjustment procedure:
Order Page Address
1 6 00
2 F E1
3
4 6 00
Data
01 After setting the data, press the PAUSE button. (Preparation)
Change the data of page : F, address : E1, and adjust the V-COM level (A) to the specified
value.
Press the PAUSE button.
00 After setting the data, press the PAUSE button. (End)
2H
Type 1
2.5 inch (PAL only)
Type 2
Type 3
Type 4
3.5 inch (NTSC/PAL)
No mark : Type 1, Type 4
〈 〉 : Type 2, Type 3
Note 1 : Set the BRIGHT control volume to their mechanical
center during adjustment.
Procedure
A
6-38
LCD size LCD board
PD-74/SD-24
PD-75/SD-25
3.0 inch (NTSC) PD-77
PD-76