Read Sony DCR-TRV725E / DCR-TRV730 / DCR-TRV730E / DCR-TRV828 / DCR-TRV828E / DCR-TRV830 / DCR-TRV830E (serv.man2) Service Manual online
— 9 —
For LCD Type SH
For LCD Type SO
7. Contrast Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/TRV830/
TRV830E)
TRV830E)
Set the level of the VIDEO signal for driving the LCD to the
specified value. If deviated, the screen image will be blackish
or saturated (whitish).
specified value. If deviated, the screen image will be blackish
or saturated (whitish).
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 3 of CN5502 (VG)
External trigger: Pin 4 of CN5502
(PSIG)
External trigger: Pin 4 of CN5502
(PSIG)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
AA
Specified Value
2.5 LCD TYPE SO (61k)
A = 2.76 ± 0.07V
2.5 LCD TYPE SO (123k)
A = 2.58 ± 0.07V
3.5 LCD TYPE SO (123k)(NTSC)
A = 2.76 ± 0.07V
3.5 LCD TYPE SO (123k)(PAL)
A = 2.64 ± 0.07V
Note:
Refer to “LCD Type Check” for the discrimination of the LCD type.
8. Center Level Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/TRV830/
TRV830E)
TRV830E)
Set the video signal center level of LCD panel to an appropriate
level.
level.
9. COM AMP Adjustment (PD-138 board)
(DCR-TRV730)
Set the common electrode drive signal level of LCD to the
specified value.
specified value.
Page
5-34
5-35
:
Added portion.
7. Contrast Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/TRV830/
TRV830E /TRV730 (LCD TYPE SO) )
TRV830E /TRV730 (LCD TYPE SO) )
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 3 of CN5502 (VG)
External trigger: Pin 4 of CN5502
(PSIG)
External trigger: Pin 4 of CN5502
(PSIG)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
AA
Specified Value
2.5 LCD TYPE SO (61k)(NTSC)
A = 2.80 ± 0.07V
2.5 LCD TYPE SO (61k) (PAL)
A = 2.76 ± 0.07V
2.5 LCD TYPE SO (123k)
A = 2.58 ± 0.07V
3.5 LCD TYPE SO (123k)(NTSC)
A = 2.76 ± 0.07V
3.5 LCD TYPE SO (123k)(PAL)
A = 2.64 ± 0.07V
8. Center Level Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/TRV830/
TRV830E /TRV730 (LCD TYPE SO) )
TRV830E /TRV730 (LCD TYPE SO) )
9. COM AMP Adjustment (PD-138 board)
(DCR-TRV730 (LCD TYPE SH) )
Click on the first or last page to see other DCR-TRV725E / DCR-TRV730 / DCR-TRV730E / DCR-TRV828 / DCR-TRV828E / DCR-TRV830 / DCR-TRV830E (serv.man2) service manuals if exist.