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6-3. DM-89 Board Replacement
(37) Enter A34 : DM VR 3 of the maintenance mode.
(38) Connect the oscilloscope's CH-2 to TP6/DM-89(D-1). GND: E702/DM-89(D-1)
(39) OXIDE C, Sub adjustment
(i) Adjust the level difference at 7 MHz use 2 MHz as the reference.
Adjustment point: A34 : DM VR 3 : SUB OXIDE-C-A
Specification:
[dB]
C
0
2
7
DNW-A22
(ii) Set the data value of A34 : DM VR 3 : SUB OXIDE-C-B to the identical data value as SUB
OXIDE-C-A.
(40) To exit A34 : DM VR 3, press the MENU button once.
(41) Disconnect the shorting clip from TP5/DM-89(D-1).
A
B
C
RV704
RV703
D902
ON
E303
TP8
TP7
S901
OFF
TP6
TP5
E901
TP704
TP702
TP701
RV702
TP305
RV701
TP700
TP306
TP208
RV401
RV301
RV302
RV303
RV304
RV402
S302
RV406
S301
TEST
NOR
RV407
E302
TEST
NOR
TP303
TP304
RV405
TP403
TP404
TP302
TP300
E301
DM-89 Board (Side A)
6-36
C = +11.0 ± 0.5 dB
A(*)MAG: 2 dB
[MHz]
D
DM-89
E
F
G
OFF
ON
RV504
E105
S501
TP2
TP1
RV503
A No.
LOTNO,
S NO,
E702
TP4
TP3
TP705
TP505
TP503
TP504
E701
TP502
TP703
E501
RV501
RV502
TP501
RV507
RV506
TP500
RV104
TP105
TP106
TP506
RV305
RV105
RV102
RV306
RV106
RV107
RV307
RV101
RV202
RV201
RV308
RV103
E104
RV108
E102
TP104
S102
TEST
NOR
S101
RV211
RV212
TP102
NOR
TEST
TP202
RV205
TP103
E103
TP204
TP100
TP203
E101
E902
[dB]
C
0
2
1
2
3
4
5
6
7
A(*)MAG: 2 dB
7
[MHz]
DNW-A22P
DNW-A22/A22P
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