Sony DNW-A100 Maintenance Manual page 125

3. METAL Playback Check
1. During play back the alignment tape in VARIABLE
+1 time speed mode (or the search +1 time speed
mode), check that the picture (color-bar) on the video
monitor is satisfied the following specifications.
If the specification is not satisfied, check again after
performing the following steps (1) through (5).
PB portion: Color-bar signal (14:00 to 17:00) of
CR5-1B (NTSC) / CR5-1B PS (PAL)
Specification 3: The picture (color-bar) is colored.
(The C signal is not fully muted.)
If the specification 3 is not satisfied (METAL)
(1) Set the CHARACTER switch to ON.
(2) To operate the maintenance mode, press the MENU
button once.
(3) Subtract 1 from the data of "GUARD BAND METAL-
C" in A35 : DM VR 4.
(4) To perform the tape operation, press the SET button
once.
(5) Set the CHARACTER switch to OFF.
(6) Perform step 1 again.
2. Eject the alignment tape.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
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4. OXIDE Guard Band Width Check
1. During play back the alignment tape in JOG mode,
turn the search dial until guard band appears at the
center on the video monitor screen.
PB portion: 75% color-bar signal (0:00 to 3:00) of
Gurad band of Y
(Gray)
2. Check the state of the guard band width.
If the specification is not satisfied, check again after
performing steps (1) through (5).
Specification 1: Guard band width is below a half of
Specification 2: Width of C side > Width of Y side
If the specification 1 or 2 is not satisfied (OXIDE)
(1) Set the CHARACTER switch to ON.
(2) To operate the maintenance mode, press the MENU
button once.
(3) When the specification 1 is not satisfied:
Subtract 1 from each data of "GUARD BAND
OXIDE-Y" and "GUARD BAND OXIDE-C" in
A35 : DM VR 4.
When the specification 2 is not satisfied:
Add 1 to the data of "GUARD BAND OXIDE-C"
in A35 : DM VR 4.
(4) To perform the tape operation, press the SET button
once.
(5) Set the CHARACTER switch to OFF.
(6) Perform step 2 again.
3-8. Analog Betacam PB System Alignment
3-8-17. Guard Band Width Adjustment
CR5-2A (NTSC) / CR5-2A PS (PAL)
Gurad band of C
(C only is muted)
Guard Band
video display screen's height.
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