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(11) Playback the 75% color-bar signal portion (0:00 to 3:00) of the alignment tape CR5-2A or CR5-2A
PS in the JOG mode. (DNW-A22: CR5-2A, DNW-A22P: CR5-2A PS)
(12) Turn the search dial until guard band appears at the center on the video monitor screen.
(Refer to Figure 1.)
(13) OXIDE, Guard band width confirmation
Confirm the following specifications. If both are satisfied, go to step (16).
If not, perform step (14) or (15).
Specification 1: Guard band width is below a half of video display screen's height.
Specification 2: Guard band width of C side > Guard band width of Y side
(14) If the specification 1 is not satisfied:
Subtract 1 from each data value of GUARD BAND OXIDE-Y and GUARD BAND OXIDE-C, then
perform the confirmation of step (13) again.
(15) If the specification 2 is not satisfied:
Add 1 to the data value of GUARD BAND OXIDE-C, then perform the confirmation of step (13)
again.
(16) OXIDE C confirmation
Playback the 75% color-bar signal portion (0:00 to 3:00) of the alignment tape CR5-2A or CR5-2A
PS in the VARIABLE +1 time speed mode (or the search +1 time speed), and confirm the following
specification. If satisfied, go to step (18). If not, perform step (17).
(DNW-A22: CR5-2A, DNW-A22P: CR5-2A PS)
Specification 3: The picture (color-bar) on the video monitor is colored.
(The C signal is not fully muted.)
(17) If the specification 3 is not satisfied:
Subtract 1 from the data value of GUARD BAND OXIDE-C, then perform the confirmation of step
(16) again.
(18) Eject the alignment tape CR5-2A/CR5-2A PS.
(19) To exit A35 : DM VR 4, push the MENU button once.
(20) Data save
Enter A3F : NV-RAM CONTROL of the maintenance mode, execute "SAVE ALL ADJUST
DATA".
(21) Check that the message "Save Complete" is displayed on the video monitor.
(22) To exit A3F : NV-RAM CONTROL, press the MENU button once.
(23) To exit the maintenance mode, press the MENU button three time again.
Gurad band of Y
n
The menu of the maintenance mode is superimposed on picture on the video monitor in fact.
If the superimposed picture obstructs the maintenance operation, set the CHARACTER switch on the sub
control panel to OFF. (Be sure to return it to ON after the maintenance operation is completed.)
DNW-A22/A22P
(Gray)
Figure 1. Guard Band
Gurad band of C
(C only is muted)
6-3. DM-89 Board Replacement
6-65
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