3-82
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
3-8-13. Drop-out Compensation Equalizer
Adjustment
Preparing tools
.
Oscilloscope:
TEKTRONIX 2465B or equivalent
.
Extension board: EX-377 (Part No. J-6269-810-A)
.
Alignment tape
For NTSC:
CR5-1B (Part No. 8-960-096-41)
For PAL:
CR5-1B PS (Part No. 8-960-096-91)
Preparation
1. Extend the DM-89 board with an extension
board EX-377.
n
Before removing DM-89 board, wait for more than 30
seconds after turning off the POWER switch.
2. Check the switch settings on the DM-89
board.
Reset the switch settings on the DM-89 board to the
factory settings. (Refer to step 1 in “3-8-2. Common
Preparation”.)
3. Check the setting on the upper control panel.
REMOTE/LOCAL
8
LOCAL (unlit 9P)
4. Check the setting on the sub control panel.
KEY INHIBIT switch
8
OFF
5. Check that the equipment has warmed up.
Before starting the adjustment, warm up the VTR and
oscilloscope through the power for 20 minutes or more.
1. METAL Y Adjustment
1.
Connect and set the oscilloscope as follows:
CH-1: TP203/DM-89(G-7), DC >200 mV/DIV
GND: E902/DM-89(G-7)
CH-2: TP4/DM-89(E-1), DC 1 V/DIV
GND: E702/DM-89(D-1)
TIME: 2 ms/DIV
TRIG: CH-2,
_
slope
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:
1
RV201/DM-89(G-5)
Specifications (Level at 6 MHz is 100% {0 dB}.):
8 MHz:
100
±
20 % {0
±
2.0 dB}
10 MHz: NTSC: 120
+
50
% {2.0
+
5.0
dB}
_
20
_
2.0
PAL:
110
+
40
% {1.0
+
4.0
dB}
_
20
_
2.0
4.
Stop the playback of the alignment tape.
NTSC model
PAL model
1
100%
4
6
8
10
[MHz]
1
100%
6
8
10
[MHz]
DM-89 Board (Side A)
RV704
A
D902
B
C
D
E
F
G
S901
DM-89
RV503
E303
1
2
3
4
5
6
7
A
1-648-541-
MADE IN JAPAN
E901
RV703
TP8
TP7
TP6
TP5
TP4
TP3
TP2
TP1
RV504
E105
LOTNO,
S NO,
S501
E702
TP505
TP705
TP704
E701
TP703
TP702
TP701
TP305
TP700
TP306
TP208
RV301
RV302
RV303
RV304
RV401
RV701
RV702
RV402
RV406
RV407
TEST
S301
TP304
E302
TP303
TP302
E301
TP300
TP404
TP403
RV405
TP503
E501
TP504
TP502
RV502
RV501
RV506
RV507
TP500
TP506
TP501
TP106
TP105
RV102
RV104
RV101
RV103
RV305
RV306
RV307
RV308
RV105
RV106
RV107
RV108
RV201
RV202
E104
TP104
E102
TP102
TP103
S101
E103
E101
TP100
S102
RV211
RV212
RV205
TP202
TP204
E902
TP203
A No.
ON
OFF
S302
TEST
TEST
TEST
ON
OFF
NOR
NOR
NOR
NOR
3-8. Analog Betacam PB System Alignment
3-8-13. Drop-out Compensation Equalizer Adjustment
