Sony GV-A500E, Service Manual

Page: 86 / 127

5-27
2. Filter f0 Adjustment (VC-197 board)
Minimize the chroma signal residual components during composite
video signal input.
Note :
Do not insert a plug into the S video terminal.
Mode VTR stop
Signal Color bar (Video input)
Measurement Point Pin
9
of CN207 (EZ I/O)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 5A
Specified Value Minimum residual chroma signal
components
Adjusting method:
1)
Set page: 0, address: 01, data: 01.
2) Set page: 3, address: 01, data: 33 and press the PAUSE button
of the adjusting remote commander.
3) Change the data of page: F, address: 5A, and minimize the
residual chroma signal components (A).
4) Press the PAUSE button of the adjusting remote commander.
5) Set page: 3, address: 01, data: 00 and press the PAUSE button
of the adjusting remote commander.
6) Set page: 0, address: 01, data: 00.
Fig. 5-3-9.
Residual chroma component
H
H
Before
adjustment
After
adjustment
Residual chroma
component (A)
3. Y OUT Level Adjustment (VC-197 board)
Set the Y signal output level.
Note :
Insert the plug into the S video terminal.
Mode VTR stop
Subject Arbitrary
Measurement Point Y signal terminal of S VIDEO
terminal (75
Ω
terminated)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 56
Specified Value A = 286 ± 5 mV (NTSC)
A = 300 ± 5 mV (PAL)
Adjusting method:
1)
Set page: 0, address: 01, data: 01.
2) Set page: 3, address: 01, data: 41 and press the PAUSE button
of the adjusting remote commander.
3) Change the data of page: F, address: 56, and set the SYNC
level (A) to the specified value.
4) Press the PAUSE button of the adjusting remote commander.
5) Set page: 3, address: 01, data: 00 and press the PAUSE button
of the adjusting remote commander.
6) Set page: 0, address: 01, data: 00.
Fig. 5-3-10.
H
A