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7. Bright Adjustment (PD-71 board)
Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will not be consistent or will be
blackish or saturated (whitish).
Mode
VTR playback
Signal
Optional recorded tape
Pin 0 of CN5801 (VG) (CL5804)
Measurement Point
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
C8
A = 1.7 ± 0.1V (NTSC)
Specified Value
A = 2.3 ± 0.1V (PAL)
Adjusting method:
1) Set data: 01 to page: 1, address: 00.
2) Input the following data to page: D, addresses: F0 to F6.
Address
F0
F1
00
5B
Data
Note: Press the PAUSE button of the adjusting remote
commander each time to set the data.
3) Change the data of page: D, address: C8, and set the voltage (A)
between the pedestal and 20IRE to the specified value.
Note: When select address: C8, select address: CB first, and then
select address: C8.
4) Press the PAUSE button of the adjusting remote commander.
5) Input the following data to page: D, addresses: F0 to F6.
Address
F0
F1
3B
46
Data
Note: Press the PAUSE button of the adjusting remote
commander each time to set the data.
6) Set data: 00 to page: 1, address: 00.
7) Check that the specified value of "Contrast Adjustment" is
satisfied, if not, perform "Contrast Adjustment".
20IRE
A
Fig. 6-1-19.
F2
F3
F4
F5
F6
00
C0
80
40
A0
F2
F3
F4
F5
F6
30
DE
82
40
A8
2H
8. V-COM Level Adjustment (PD-71 board)
Set the common electrode drive signal of the LCD display to the
specified value.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
1) Set data: 01 to page: 1, address: 00.
2) Change the data of page: D, address: CD, and set the COM-O
signal level (A) to the specified value.
3) Press the PAUSE button of the adjusting remote commander.
4) Set data: 00 to page: 1, address: 00.
6-27
VTR playback
Audio operation check tape,
color bar portion
Pin !¢ of CN5801 (COM-O) (CL5801)
Oscilloscope
D
CD
A = 7.4 ± 0.05V
2H
Fig. 6-1-20.
A
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