Dm Rf Output Level Readjustment; Cr5-1B (Ntsc) / Cr5-1B Ps (Pal) - Sony DNW-A100 Maintenance Manual
Digital video hybrid recorder
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- Maintenance manual (416 pages) ,
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2. METAL C Adjustment
1. Change the connection of the oscilloscope as follows:
CH-1: TP403/DM-89(D-6), GND: E303/DM-89(B-1)
CH-2: TP5/DM-89(D-1), GND: E702/DM-89(D-1)
2. During play back the alignment tape in PLAY mode,
measure the level at 6 MHz part.
PB portion: RF sweep signal (0:00 to 2:00) of
CR5-1B (NTSC) / CR5-1B PS (PAL)
This measured level is reference level 100% (0 dB).
3. During play back the alignment tape in PLAY mode,
adjust the levels at 8 MHz and 10 MHz parts.
PB portion: The same as step 2
Adj. point: 1RV401/DM-89(G-4)
Specifications (Level at 6 MHz is 100% {0 dB}.):
8 MHz: 100 ± 20 % {0 ± 2.0 dB}
+40
10 MHz: 110
% {2.0
_20
NTSC model
100%
1
PAL model
100%
1
4
4. Stop the playback of the alignment tape.
n
It is not necessary to eject the alignment tape when
perform subsequent "3-8-14. DM RF Output Level
Readjustment".
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
+4.0
dB}
_2.0
6
8
10
[MHz]
6
8
10
[MHz]
3-8. Analog Betacam PB System Alignment
3-8-13. Drop-out Compensation Equalizer Adjustment
3-8-14. DM RF Output Level Readjustment
3. OXIDE Y/C Adjustment
Set the following RVs on the DM-89 board to each
specified position as shown figure below.
RV202 (G-5)
3-8-14. DM RF Output Level Readjustment
Readjust the DM RF output level referring to Section 3-8-7
again.
RV402 (C-4)
3-83
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