Sony Betacam SX DNW-A100 Maintenance Manual page 47

Check and Adjustment
n
Wait more than 30 minutes after turning on the power, then perform the check and adjustment.
1. Check and Adjustment of Analog Composite Input Level
(1) Set the output signal of a signal generator to color-bar signal.
For BKDW-505: 75% color-bar signal
For BKDW-506: 100% color-bar signal
(2) Check using a waveform monitor that the level between the pedestal and peak white satisfies the
specifications. When the specification is satisfied, go to "2. Frequency Response Check".
If the specification is not satisfied, perform steps (3) to (9), then go to "2. Frequency Response
Check".
COMPOSITE VIDEO OUT
A
Specification : A = 100 ±2 IRE (714 ±14 mV)
BKDW-505 (75% color-bar signal/NTSC)
Refer to 1-34 page for the operation method of the maintenance mode when adjusting.
(3) Press S1101 on the SS-63 board so as to enter the maintenance mode.
(4) Select "AGC VIDEO GAIN" of A25: DEC VR.
(5) Turn the search dial slowly while pressing the JOG button on the lower control panel until the level
between the pedestal and peak white satisfies the specifications.
n
The data value displayed on the video monitor screen changes.
Turn the search dial while monitoring the change in a level.
(6) After completing the adjustment, press the MENU button once so as to exit A25:DEC VR.
(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) Press the MENU button four times so as to exit the maintenance mode.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
COMPOSITE VIDEO OUT
A
Specification: A = 700 ±14 mV
BKDW-506 (100% color-bar signal/PAL)
1-16. Installation of BKDW-505/506
1-35