S Video Out Y Level Adjustment (Vc-235 Board); S Video Out Chroma Level Adjustment (Vc-235 Board) - Sony DCR-TRV820 Service Manual

3. S VIDEO OUT Y Level Adjustment (VC-235 board)

Mode VTR stop
Subject Arbitrary
Measurement Point Y signal terminal of S VIDEO jack
(75 Ω terminated)
Measuring Instrument Oscilloscope
Adjustment Page C
Adjustment Address 25
Specified Value A = 1000 ± 20 mV
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 11, set data: 10, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 3, address: 0C, set data: 02, and press the PAUSE
button.
4) Select page: C, address: 25, change the data and set the Y sig-
nal level (A) to the specified value.
5) Press the PAUSE button.
6) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
7) Select page: D, address: 11, set data: 00, and press the PAUSE
button.
8) Select page: 0, address: 01, and set data: 00.
H
Fig. 5-3-11
4. S VIDEO OUT Chroma Level Adjustment
(VC-235 board)
Mode
Subject
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: D, address: 11, set data: 10, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 3, address: 0C, set data: 02, and press the PAUSE
button.
4) Select page: C, address: 26, change the data and set the Cr
signal level (A) to the specified value.
5) Press the PAUSE button.
6) Select page: C, address: 27, change the data and set the Cb
signal level (B) to the specified value.
7) Press the PAUSE button.
A
8) Check that the burst signal level (C) is satisfied the specified
value.
9) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
10) Select page: D, address: 11, set data: 00, and press the PAUSE
button.
11) Select page: 0, address: 01, and set data: 00.
0.28 µsec (NTSC)
0.23 µsec (PAL)
5-49
VTR stop
Arbitrary
Chroma signal terminal of S VIDEO
jack (75 W terminated)
External trigger: Y signal terminal of
S VIDEO jack
Oscilloscope
C
26, 27
Cr level: A=714 ± 14 mV (NTSC)
A=700 ± 14 mV (PAL)
Cb level: B=714 ± 14 mV (NTSC)
B=700 ± 14 mV (PAL)
Burst level: C=286 ± 6 mV (NTSC)
C=300 ± 6 mV (PAL)
H
A
B
0.28 µsec (NTSC)
0.23 µsec (PAL)
Fig. 5-3-12
C