R-Y/B-Y Black Balance Adjustment; R-Y/B-Y Out Level Adjustment - Sony CCU-700A Maintenance Manual

3-3-21. R-Y/B-Y Black Balance Adjustment

Rank: A
Equipment:
Vectorscope
To be extended:
VA-156 board
Preparation
• CLOSE button/MSU-700→ "ON"
• Vectorscope mode→ MAX GAIN mode
• Set the MASTER BLACK adjustment value that is
displayed on the display block to "–99" with the MAS-
TER BLACK control/MSU-700.
Test point:
VBS 1 OUT connector/CCU rear panel
Adjustment Procedure
• Observe the vectorscope screen and adjust 1RV125 (R-
Y BLK) and 1RV221 (B-Y BLK)/VA-156 board so that
the beam spot of black level sit at the nearly center of the
vectorscope.
Note: After the adjustment, set as follows.
• GAIN switch/Vectorscope→ 75% CAL
• MASTER BLACK control/MSU-700→ "0"
CCU-700A
CCU-700AP

3-3-22. R-Y/B-Y OUT Level Adjustment

Rank: A
Equipment:
Oscilloscope
To be extended:
VA-156 board
Preparation
• BARS button/MSU-700 → "ON"
• R-Y OUT connector/CCU rear panel → 75 Z Terminated
• B-Y OUT connector/CCU rear panel → 75 Z Terminated
Adjustment Procedure
VA-156 board
Test point/ Adj. point Specifications
rear panel
R-Y R-Y OUT 1RV533
B-Y B-Y OUT 1RV670
R-Y OUT
B-Y OUT
B
3-3. Video Signal System Adjustment
[For NTSC] A = 700 ±5 mV p-p
A = 525 ±5 mV p-p
[For PAL]
[For NTSC] B = 700 ±5 mV p-p
B = 525 ±5 mV p-p
[For PAL]
A
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