Rgb Amp Adjustment (Pd-118 Board); Contrast Adjustment (Pd-118 Board) - Sony DCR-TRV820 Service Manual

4. RGB AMP Adjustment (PD-118 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=3.59 ± 0.05 Vp-p (TYPE S model)
Specified Value
A=3.20 ± 0.05 Vp-p (TYPE C model)
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: A5, change the data and set the volt-
age (A) between the reversed waveform pedestal and non-re-
versed waveform pedestal to the specified value.
(The data of address: A5, should be "00" to "3F")
3) Press the PAUSE button.
4) Select page: 0, address: 01, and set data: 00.
A
Pedestal
Fig. 5-1-17
Pedestal
2H

5. Contrast Adjustment (PD-118 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:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: AA, change the data and set the volt-
age (A) between the pedestal (0 IRE) and 100 IRE to the speci-
fied value.
(The data of address: AA, should be "00" to "7F")
3) Press the PAUSE button.
4) Select page: 0, address: 01, and set data: 00.
A
Pedestal
5-31
Camera
Arbitrary
Pin 3 of CN5502 (VG)
External trigger : Pin 4 of CN5502
(PANEL COM)
Oscilloscope
D
AA
A=3.34 ± 0.07 Vp-p (TYPE S model)
A=3.00 ± 0.07 Vp-p (TYPE C model)
100 IRE
2H
Fig. 5-1-18