JVC DT-V2000SU Service Manual page 66

DT-V2000SU
CONTRAST ADJUSTMENT
NTSC 4 : 3 OVER SCAN COMPOSITE VIDEO CONTRAST
Test equipment
Signal generator (Cross-hatch pattern:100IRE)
Test points TP-47G [CRT SOCKET PWB]
•
Adjustment locations SA01 (CONTRAST)
1.Set the scan size to OVER, and set the ASPECT to 4: 3 in the MENU screen.
2.lnput the NTSC composite video signal to the input B terminal.
- -
~ ~
1 vertical cycle
3.Connect the oscilloscope to the TP-47G.
4.Adjust the waveform level between 0% black and 100% white to 30Vp-p with SA01.
~
,L
---·-
~
I
I
30Vp-p
I
I
I
I,
I
------
NTSC16:9OVERSCANCOMPOSITE~DEO CONTRAST
•
Test equipment Signal generator (Cross-hatch pattern:100IRE)
Test points TP-47G [CRT SOCKET PWB]
Adjustment locations SJ01 (CONTRAST)
1. Set the scan size to OVER, and set the ASPECT to 16 : 9 in the MENU screen.
2. Input the NTSC composite video signal to the input B terminal.
3. Connect the oscilloscope to the TP-47G.
,
...
...
1 vertical cycle
4. Adjust the waveform level between 0% black and 100% white to 30Vp-p with SJ01.
~
IL
-----
I
•
I
30Vp-p
I
I
I
I,
I ......
NTSC 4 : 3 OVER SCAN Y/C SEPARATE VIDEO SIGNAL CONTRAST
Test equipment Signal generator (Cross-hatch pattern: 1 00IRE)
•
Test points TP-47G [CRT SOCKET PWB]
Adjustment locations SB01 (CONTRAST)
1. Set the scan size to OVER, and set the ASPECT to 4: 3 in the MENU screen.
2. Input the Y/C separate video signal to the input B terminal.
3. Connect the oscilloscope to the TP-47G.
'
...
1 vertical cycle
4. Adjust the waveform level between 0% black and 100% white to 30Vp-p with SB01.
~
,L
-----
I
I
30Vp-p
I
I
I
I
......
•
50 No.51519B