Rgb Amp Adjustment (Pd-156 Board); Contrast Adjustment (Pd-156 Board) - Sony DCR-TRV140 Service Manual

2. RGB AMP Adjustment (PD-156 board)

Set the D range of the RGB driver used to drive the LCD to the
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode CAMERA
Subject Arbitrary
Pin 3 of CN5502 (VG)
Measurement Point External trigger : Pin 4 of CN5502
(PANEL COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address A5
A=3.60 ± 0.05 Vp-p (TYPE S model)
Specified Value
A=2.90 ± 0.05 Vp-p (TYPE C model)
Adjusting method:
Order Page Address Data
1 0 01 01
2 D A5
3 D A5
4 0 01 00
A
Pedestal
A: Between the reversed waveform pedestal and
non-reversed waveform pedestal
Fig. 5-1-17
Procedure
Change the data and set the
voltage (A) to the specified
value. (The data of address:
A5, should be "00" to "3F")
Press PAUSE button
Pedestal
2H
DCR-TRV140/TRV140E/TRV140M

3. Contrast Adjustment (PD-156 board)

Set the level of the VIDEO signal for driving the LCD to the speci-
fied value. If deviated, the screen image will be blackish or satu-
rated (whitish).
Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 D AA
3 D AA
4 0 01
A
Pedestal
A: Between the pedestal (0 IRE) and 100 IRE
5-27
CAMERA
Arbitrary
Pin 3 of CN5502 (VG)
External trigger : Pin 4 of CN5502
(PANEL COM)
Oscilloscope
D
AA
A=3.45 ± 0.07 Vp-p (TYPE S model)
A=2.80 ± 0.07 Vp-p (TYPE C model)
Procedure
01
Change the data and set the
voltage (A) to the specified
value. (The data of address:
AA, should be "00" to "7F")
Press PAUSE button.
00
100 IRE
2H
Fig. 5-1-18