6-28
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
6-3. Analog Video Playback System Adjustment after Replacing the Drum
Frequency
Specification for DNW-A100/A50/A45
7T BAR
Reference: 100% {0 dB}
1 MHz
Adjust : 94 (100 to 89)%
{
_
0.5
±
0.5 dB}
0.2 MHz
Check : 100 (106 to 71)%
{0
+
0.5
dB}
_
3.0
0.5 MHz
Check : 100 (106 to 71)%
{0
+
0.5
dB}
_
3.0
2 MHz
Check : 80 (106 to 71)%
{
_
2.0
+
2.5
dB}
_
1.0
Frequency
Specifications for DNW-A100P/A50P/A45P
8T BAR
Reference: 100% {0 dB}
1.5 MHz
Adjust : 93 (102 to 85)%
{
_
0.6
±
0.8 dB}
0.2 MHz
Check : 100 (106 to 71)%
{0
+
0.5
dB}
_
3.0
0.5 MHz
Check : 100 (106 to 71)%
{0
+
0.5
dB}
_
3.0
1 MHz
Check : 100 (106 to 71)%
{0
+
0.5
dB}
_
3.0
2 MHz
Check : 80 (106 to 71)%
{
_
2.0
+
2.5
dB}
_
1.0
METAL C adjustment [up to step (9)]
(7) Observe the R-Y output signal on the component waveform monitor.
(8) Playback the multiburst signal portion (8:00 to 11:00) of the alignment tape CR5-1B or CR5-1B PS,
and adjust so that the level at 1 MHz (or 1.5 MHz for PAL) portion is within specification. And
confirm that levels at other frequencies are within specifications.
(DNW-A100/A50/A45: CR5-1B, DNW-A100P/A50P/A45P: CR5-1B 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:
A32 : DM VR 1 : EQ1 METAL-C-A
B channel:
A32 : DM VR 1 : EQ1 METAL-C-B
Specifications (A and B channels): Show the table below.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
(9) Observe the B-Y output signal on the component waveform monitor. Confirm the B-Y signal levels
at each frequencies are within specifications shown above. If the B-Y signal is out of specifications,
perform fine adjustment for R-Y until the specifications for both B-Y and R-Y signals are satisfied.
(10) Eject the alignment tape CR5-1B/CR5-1B PS.
8T BAR
0.2 0.5 1 1.5 2
[MHz]
100%
7T BAR
0.2
0.5
1
1.5
2
[MHz]
100%
