Sony DCR-TRV230E Service Manual page 172

3. RGB AMP Adjustment (PD-138 board)
(DCR-TRV430E)
Set the D range of the RGB decoder used to drive the LCD to the
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode VTR stop
Signal No signal
Measurement Point Pin 3 of CN5502 (VG)
External trigger: Pin 4 of CN5502
(PANEL COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address A5
Specified Value 3.0 LCD TYPE SH
Note: Refer to "LCD Type Check" for the discrimination of the LCD type.
Adjusting method:
Order Page Address Data
1 0 01 01
2 D A5
3 D A5
4 0 01 00
2H
Pedestal
Fig. 5-1-18.
A = 3.72 ± 0.05V
Procedure
Set the data.
Change the data and set the voltage
(A) between the reversed waveform
pedestal and non-reversed waveform
pedestal to the specified value.
(The data should be "00" to "3F")
Press PAUSE button.
Set the data.
Pedestal
4. RGB AMP Adjustment (PD-139 board)
(DCR-TRV230E/TRV235E/TRV325E/TRV330E/TRV530E)
Set the D range of the RGB decoder used to drive the LCD to the
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: Refer to "LCD Type Check" for the discrimination of the LCD type.
Adjusting method:
Order Page Address Data
1 0
2 D
3 D
4 0
A
A
5-31
VTR stop
No signal
Pin 3 of CN5502 (VG)
External trigger: Pin 4 of CN5502
(PSIG)
Oscilloscope
D
A5
2.5 LCD TYPE SO
A = 7.58 ± 0.05V
3.5 LCD TYPE SO
A = 7.52 ± 0.05V
Procedure
01 01 Set the data.
A5 Change the data and set the voltage
(A) between the reversed waveform
pedestal and non-reversed waveform
pedestal to the specified value.
(The data should be "00" to "FF")
A5 Press PAUSE button.
01 00 Set the data.
Pedestal
2H
Pedestal
Fig. 5-1-19.