6-19
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
6-3. Analog Video Playback System Adjustment after Replacing the Drum
DM-89 Board (Side A)
6-3-3. DM RF Output Level Pre-adjustment
Measuring equipment:
Oscilloscope (Band width limit: ON)
(1) Connect and set the oscilloscope as follows:
CH-1:
TP3/DM-89(E-1), AC 100 mV/DIV, 2 ms/DIV, GND: E702/DM-89(D-1)
CH-2:
TP4/DM-89(E-1), DC 1 V/DIV, GND: E702/DM-89(D-1)
Trigger: CH-2, negative (
_
) slope
(2) METAL Y adjustment
Playback the flat field signal portion (24:00 to 26:00) of the alignment tape CR5-1B or CR5-1B PS,
and perform the adjustment.
(DNW-A100/A50/A45: CR5-1B, DNW-A100P/A50P/A45P: CR5-1B PS)
Adjustment point:
1
RV211/DM-89(G-6)
Specification:
A = 400
±
40 mV p-p
(3) Stop the playback of the alignment tape CR5-1B/CR5-1B PS.
(4) Change the connection of the oscilloscope as follows:
CH-1:
TP7/DM-89(C-1), GND: E702/DM-89(D-1)
Trigger: TP5/DM-89(D-1), GND: E702/DM-89(D-1)
(5) METAL C adjustment
Playback the flat field signal portion (24:00 to 26:00) of the alignment tape CR5-1B or CR5-1B PS,
and perform the adjustment.
(DNW-A100/A50/A45: CR5-1B, DNW-A100P/A50P/A45P: CR5-1B PS)
Adjustment point:
1
RV406/DM-89(C-5)
Specification:
B = 400
±
40 mV p-p
(6) Eject the alignment tape CR5-1B/CR5-1B PS.
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
TP6
TP4
TP5
TP7
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
A
B