Sony DNW-A100 Maintenance Manual page 161

3. Analog Composite Input Level (MANUAL) Adjustment
(1) Connect as connection 1.
(2) Push S1101 on the SS-63 board so as to enter the maintenance mode.
(3) Select A26: DEC VR (LOOP) of A2: AUDIO/VIDEO ADJUST of the maintenance mode.
(4) Select "VIDEO GAIN".
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100% color bar signal is output from the video test signal generator in this unit.
(5) Adjust "VIDEO GAIN" that the specification is satisfied.
VIDEO OUTPUT COMPOSITE 2
Before adjustment
Specification: The white level of the signal after looping overlaps on the 1st signal.
[|Supplement|] The signal after looping is displaied in a state of overlapping on 1st signal on the screen of the waveform monitor.
They appear that the 1st signal is freezing and the signal after looping is changing the fluctuation level.
(6) After completing the adjustment, push the MENU button once so as to exit A26: DEC VR (LOOP).
(7) Select A2F: NV-RAM CONTROL and save the adjusted data in NV-RAM (execute "SAVE ALL
ADJUST DATA").
(8) Check that the message "Save Complete" is displayed on the video monitor screen.
(9) Push the MENU button once so as to exit A2F: NV-RAM CONTROL.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
After adjustment
4-1. DEC-65 Board (BKDW-505/506)
4-7