Sony Betacam SX DNW-A100 Maintenance Manual page 333

VISC phase adjustment [to step (11)]
(8) Set the composite waveform/vector monitor as follows:
DNW-A100/A50/A45:
DNW-A100P/A50P/A45P: VECTOR mode, Line select: 8, EXT REF
(9) Align the center position of VISC (beam spot) to 0 degree using PHASE knob of the composite
waveform/vector monitor.
n
Turn the PHASE knob so that the beam spot (VISC) moves in the shortest route to 0 degree.
(10) Set the CAPSTAN LOCK switch on the sub control panel as follows:
DNW-A100/A50/A45:
DNW-A100P/A50P/A45P: 8FD
(11) Adjust the center position of VISC (beam spot) to meet the specifications.
Adjustment point: 1RV200/TBC-23(C-1)
Specifications: Center of beam spot:
Jitters of beam spot:
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If the specification is not satisfied, perform VISC phase adjustment of steps (12) through (15) after
setting RV200 to the mecanical center.
VISC
+15d
0d
_15d
DNW-A100/A50/A45
Perform following steps (12) through (15) when the specification in step (11) is not satisfied.
(12) To operate the maintenance mode, press the MENU button once.
(13) Change the data value of item "VISC PHASE" within +1 or _1 so that the center of VISC (beam
spot) moves closer to 0 degree.
(14) Press the SET button once on the lower control panel to perform the tape operation.
(15) Perform step (11) again.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
VECTOR mode, Line select: 11, EXT REF
4FD
0 ± 5d
0 ± 15d
RV200
RV200 of TBC-23 Board
6-7. TBC-23 Board Replacement
VISC
+15d
0d
_15d
DNW-A100P/A50P/A45P
TBC-23 board
6-95