Bright Adjustment (Pd-93 Board); Contrast Adjustment (Pd-93 Board) - Sony Handycam Vision CCD-TRV89E Service Manual

4. Bright Adjustment (PD-93 board)

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).
Mode VTR stop
Signal No signal
Pin 3 of CN4501 (VG) of PD-93
Measurement point
board
External trigger : Pin 4 of CN4501
(PANEL COM)
Measuring instrument Oscilloscope
Adjustment page E
Adjustment address CF
A = 1.94 ± 0.05V
Specified value
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 55, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 2, address: 7D, and set data: 40.
4) Select page: E, address: CF, change the data and set the voltage
(A) between the pedestal and white to the specified value. (The
data of address: CF should be "41" to "BF".)
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
7) Select page: 2, address: 7D, and set data: 00.
8) Select page: 0, address: 01, and set data: 00.
White
Pedestal
A
Fig. 5-1-23.
2H

5. Contrast Adjustment (PD-93 board)

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).
Mode
Signal
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: 3, address: 01, set data: 55, and press the PAUSE
button of the adjusting remote commander.
3) Select page: 2, address: 7D, and set data: 00.
4) Select page: E, address: D3, change the data and set the voltage
(A) between the pedestal (0 IRE) and 100 IRE to the specified
value.
5) Press the PAUSE button of the adjusting remote commander.
6) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
7) Select page: 0, address: 01, and set data: 00.
100 IRE
A
5-30
VTR stop
No signal
Pin 3 of CN4501 (VG) of PD-93
board
External trigger : Pin 4 of CN4501
(PANEL COM)
Oscilloscope
E
D3
A = 3.52 ± 0.07V
0 IRE
2H
Fig. 5-1-24.