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(33) Connect the oscilloscope's CH-2 to TP7/DM-89(C-1). GND: E702/DM-89(D-1)
(34) Enter A33 : DM VR 2 of the maintenance mode.
(35) OXIDE C, Main adjustment
(i) Adjust the level difference at 6 MHz (DNW-A22) or 7 MHz (DNW-A22P) use 2 MHz as the
reference.
Adjustment point: A33 : DM VR 2 : MAIN OXIDE-C-A
Specification:
[dB]
B
0
2
6
DNW-A22
(ii) Set the data value of A33 : DM VR 2 : MAIN OXIDE-C-B to the identical data value as MAIN
OXIDE-C-A.
(36) To exit A33 : DM VR 2, press the MENU button once.
A
B
C
RV704
RV703
D902
ON
E303
TP8
S901
OFF
E901
TP7
TP6
TP5
TP704
TP702
TP701
RV303
RV702
TP305
RV304
TP700
TP306
RV701
TP208
RV401
RV301
RV302
RV402
S302
RV406
S301
TEST
NOR
RV407
TEST
NOR
E302
TP303
TP304
RV405
TP403
TP404
TP302
TP300
E301
DM-89 Board (Side A)
DNW-A22/A22P
B = +1.2 ± 0.5 dB
A(*)MAG: 1 dB
[MHz]
D
DM-89
E
F
G
OFF
ON
RV504
E105
S501
TP4
TP3
TP2
TP1
RV503
A No.
LOTNO,
S NO,
E702
TP705
TP505
TP503
TP504
E701
TP502
TP703
E501
RV501
RV502
TP501
RV507
RV506
TP500
TP105
TP106
TP506
RV305
RV105
RV102
RV104
RV306
RV106
RV107
RV307
RV101
RV103
RV202
RV201
RV308
RV108
E104
E102
TP104
S102
TP103
NOR
TEST
S101
RV211
RV212
TP102
TEST
NOR
E103
TP202
RV205
TP204
TP100
TP203
E101
E902
[dB]
B
0
2
1
2
3
4
5
6
7
6-3. DM-89 Board Replacement
A(*)MAG: 1 dB
7
[MHz]
DNW-A22P
6-35
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