Read Sony DCR-TRV738E / DCR-TRV740 / DCR-TRV740E / DCR-TRV840 (serv.man2) Service Manual online
5-55
DCR-TRV738E/TRV740/TRV740E/TRV840
3. S VIDEO OUT Chroma Level Adjustment
(VC-278 board)
Mode
VTR stop
Signal
No signal
Measurement Point
Chroma signal terminal of S VIDEO
jack (75
jack (75
Ω
terminated)
External trigger: Y signal terminal of
S VIDEO jack
S VIDEO jack
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
26, 27
Specified Value
Cr level: A = 714
±
14mV (NTSC)
A = 700
±
14mV (PAL)
Cb level: B = 714
±
14mV (NTSC)
B = 700
±
14mV (PAL)
Burst level: C =286
±
6mV (NTSC)
C =300
±
6mV (PAL)
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
A
12
10
Set the data, and press PAUSE
button.
button.
3
3
0C
02
Set the data, and press PAUSE
button.
button.
4
C
26
Change the data and set the Cr signal
level (A) to the specified value.
level (A) to the specified value.
5
C
26
Press PAUSE button.
6
C
27
Change the data and set the Cb signal
level (B) to the specified value.
level (B) to the specified value.
7
C
27
Press PAUSE button.
8
3
0C
00
Set the data, and press PAUSE
button.
button.
9
A
12
00
Check that the burst signal level
(C) is satisfied the specified
value.
(C) is satisfied the specified
value.
10
0
01
00
Set the data.
4. VIDEO OUT Y, Chroma Level Check (VC-278 board)
Mode
VTR stop
Signal
No signal
Measurement Point
Video signal terminal of AUDIO/
VIDEO jack (75
VIDEO jack (75
Ω
terminated)
Measuring Instrument
Oscilloscope
Specified Value
Sync level: A = 293
±
18mV (NTSC)
A = 307
±
18mV (PAL)
Burst level: B = 286
±
18mV (NTSC)
B = 300
±
18mV (PAL)
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
A
12
10
Set the data, and press PAUSE
button.
button.
3
3
0C
02
Set the data, and press PAUSE
button.
button.
4
Check that the sync signal level
(A) satisfies the specified value.
(A) satisfies the specified value.
5
Check that the burst signal level
(B) satisfies the specified value.
(B) satisfies the specified value.
6
3
0C
00
Set the data, and press PAUSE
button.
button.
7
A
12
00
Set the data, and press PAUSE
button.
button.
8
0
01
00
Set the data.
Fig. 5-3-8.
H
C
A
0.28
µ
sec (NTSC)
B
0.23
µ
sec (PAL)
Fig. 5-3-9.
H
B
A
Ver 1.2 2002. 09
Click on the first or last page to see other DCR-TRV738E / DCR-TRV740 / DCR-TRV740E / DCR-TRV840 (serv.man2) service manuals if exist.