6-83
DNW-A22/A22P
2. PB Video Phase Confirmation
Measuring equipment:
Composite waveform/vector monitor
Y phase confirmation [to step (14)]
(1) Set the composite waveform/vector monitor as follows:
WAVEFORM mode, SWEEP: 2H, MAG ON, INPUT: CH-A, INT REF
(2) Display the BURST signal part of CH-A side on the composite waveform/vector monitor.
(3) Playback the color-bar signal portion (14:00 to 17:00) of the alignment tape CR5-1B or CR5-1B PS.
(DNW-A22: CR5-1B, DNW-A22P: CR5-1B PS)
(4) Confirm that time between the 50% position at rising edge of H SYNC signal and the 50% position at
the rising edge of white signal portion.
If the specification is not satisfied, perform the adjustment.
Adjustment point:
1
RV300/TBC-24(D-1)
Specification:
A = 5.2
±
0.1
µ
s
If the specification is not satisfied by adjustment, perform step (5) through (8) after setting RV300 to
the mechanical center.
Perform following steps (5) through (8) only when the specification in step (4) is not satisfied.
(5) Playback the burst signal portion (14:00 to 17:00) of the alignment tape CR5-1B or CR5-1B PS
again.
(6) Enter the maintenance mode, then enter A37 : TBC VR.
(7) Change the data value of item “SQ Y RZ” within
+
1 or
_
1.
(8) Perform step (4) again.
Data save [to step (13)]:
Perform the data save only when SQ Y RZ’s data value of
A37 : TBC VR is changed.
(9)
To exit A37 : TBC VR, press the MENU button on
the lower control panel.
(10) Enter A3F : NV-RAM CONTROL, then execute
“SAVE ALL ADJUST DATA”.
(11) Check that the message “Save Complete” is displayed
on the video monitor.
(12) To exit A3F : NV-RAM CONTROL, press the
MENU button once.
(13) To exit the maintenance mode, press the MENU
button three times again.
(14) Stop the playback of the alignment tape CR5-1B/
CR5-1B PS or eject it.
n
It is not necessary to eject the alignment tape when
perform subsequent “3. TBC Y/C Delay Confirma-
tion”.
6-6. TBC-23 Board Replacement
A
50 %
50 %
Composite waveform/vector monitor
RV300 on TBC-24 Board
RV201
RV200 RV500 RV501
RV300
RV101
RV201 RV500 RV501
RV300
RV101
RV504
TBC-24 board (suffix-11 and 12)
TBC-24 board (suffix-13 and higher)