Sony DNW-A100 Maintenance Manual page 441

OXIDE Y adjustment [up to step (13)]
(11) Observe the Y output signal on the component waveform monitor.
(12) Playback the multiburst signal portion (3:00 to 6:00) of the alignment tape CR5-2A or CR5-2A PS,
and adjust so that the level at 2 MHz (or 3 MHz for PAL) portion is within specification. And
confirm that levels at other frequencies are within specifications.
(DNW-A100/A50/A45: CR5-2A, DNW-A100P/A50P/A45P: CR5-2A PS)
n
The overlapping waveform of A channel and B channel signals is monitored on the component
waveform monitor. So adjust/confirm the signal level at each channel.
Adjustment points: A channel:
B channel:
Specifications (A and B channels):Show the table below.
Frequency Specifications for DNW-A100/A50/A45
0.5 MHz Reference: 100% {0 dB}
2 MHz Adjust : 100 (104 to 95)%
1 MHz Check : 100 (106 to 50)% {0
3 MHz Check : 89 (106 to 50)%
4.1 MHz Check : 71 (106 to 50)%
0.5 1
100%
DNW-A100/A50/A45
(13) Playback the multiburst signal portion (3:00 to 6:00) of the alignment tape CR5-2A or CR5-2A PS,
and confirm that the level difference between the A and B channel signals is hardly noticeable at
high frequency portion (4.5 MHz).
n
If the level difference is noticeable at 4.5 MHz, adjustment using menu A34: DM VR3: SUB
OXIDE-A or -B is required. Following steps 1 to 5, adjust the channel with the lower level while
playing back the multiburst signal portion (3:00 to 6:00) of the alignment tape.
1 To exit from A32 : DM VR 1, press the MENU button once.
2 Select A34 : DM VR 3 of the maintenance mode.
3 Change the data value of SUB OXIDE-Y-A (A channel side), and judge which signal is low in
level.
4 If the B channel signal is low, return the data value of SUB OXIDE-Y-A to the former data
value, then adjust the SUB OXIDE-Y-B to increase the value until the level of B channel signal
is almost equal to the level of A channel signal.
If the A channel signal is low, adjust the SUB OXIDE-Y-A to increase the value until the level
of A channel signal is almost equal to level of B channel signal.
5 To exit from A34 : DM VR 3, press the MENU button once.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
A32 : DM VR 1 : EQ1 OXIDE-Y-A
A32 : DM VR 1 : EQ1 OXIDE-Y-B
+0.3
{0 dB}
_0.4
+0.5
dB}
_6.0
+1.5
{_1.0 dB}
_5.0
+3.5
{_3.0 dB}
_3.0
2 3 4.1 4.5
[MHz]
6-3. Analog Video Playback System Adjustment after Replacing the Drum
Frequency Specifications for DNW-A100P/A50P/A45P
2T BAR Reference: 100% {0 dB}
3 MHz Adjust : 89 (100 to 79)%
0.5 MHz Check : 100 (106 to 50)%
1 MHz Check : 100 (106 to 50)%
2 MHz Check : 100 (106 to 50)%
4.1 MHz Check : 71 (106 to 50)%
2T BAR 0.5 1
100%
DNW-A100P/A50P/A45P
{_1.0 ±1.0 dB}
+0.5
{0 dB}
_6.0
+0.5
{0 dB}
_6.0
+0.5
{0 dB}
_6.0
+3.5
{_3.0 dB}
_3.0
2 3 4.1 4.5 [MHz]
6-29