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8. Burst Cleaning Adjustment for PAL model
(VC-197 baord)
Adjust to the optimum PAL chroma signal demodulation phase. If
the phase is not correct, moire distortion noises will stand out.
Mode
VTR stop
Signal
Color bar
Pin 2 of CN802 (VG) of VC-197
Measurement point
board
Measuring instrument
Oscilloscope
Adjustment page
D
Adjustment address
54, 5E
Specified value
A = 0 ± 50 mV
Note : Perform "7. Burst Cleaning Adjustment for PAL model"
and "8. Color Adjustment for PAL model" alternately until
each specified value is satisfied.
Adjusting method:
1)
Set page: 0, address: 01, data: 01.
2)
Change the data of page: D, address: 54, and adjust so that the
flicker amplitude (A) of the cyan section becomes minimum.
3)
Press the PAUSE button of the adjusting remote commander.
4)
Set the same data as page: D, address: 54 to page: D, address:
5E, and press the PAUSE button of the adjusting remote
commander.
5)
Set page: 0, address: 01, data: 00.
6)
Check that the specified value of "Color Adjustment for PAL
model" is satisfied, if not, perform "Color Adjustment for PAL
model".
Cyan
A
Fig. 5-3-32.
2H
9. Color Adjustment for PAL model (VC-197 baord)
Set the color saturation to the standard value. If deviated, the color
will be to dark or light.
Mode
Signal
Measurement point
Measuring instrument
Adjustment page
Adjustment address
Specified value
Note : Perform "7. Burst Cleaning Adjustment for PAL model"
and "8. Color Adjustment for PAL model" alternately until
each specified value is satisfied.
Adjusting method:
1)
Set page: 0, address: 01, data: 01.
2)
Change the data of page: D, address: 53, and set the green level
(A) to yellow to the specified value.
3)
Press the PAUSE button of the adjusting remote commander.
4)
Set page: 0, address: 01, data: 00.
5)
Check that the specified value of "Burst Cleaning Adjustment
for PAL model" is satisfied, if not, perform "Burst Cleaning
Adjustment for PAL model".
Yellow
Green
A
5-43
VTR stop
Color bar
Pin 2 of CN802 (VG) of VC-197
board
Oscilloscope
D
53
A = 0.37 ± 0.05V
2H
Fig. 5-3-33.
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