6-32
DNW-A22/A22P
(9) Enter A33 : DM VR 2 of the maintenance mode.
(10) Connect the oscilloscope’s CH-2 to TP3/DM-89(E-1). GND: E702/DM-89(D-1)
(11) METAL Y, Main adjustment
(i)
Adjust the level difference at 12 MHz use 2 MHz as the reference.
Adjustment point: A33 : DM VR 2 : MAIN METAL-Y-A
Specification: DNW-A22:
B =
+
8.0
±
0.5 dB
DNW-A22P: B =
+
3.5
±
0.5 dB
DNW-A22
DNW-A22P
(ii) Set the data value of A33 : DM VR 2 : MAIN METAL-Y-B to the identical data value as
MAIN METAL-Y-A.
(12) To exit A33 : DM VR 2, press the MENU button once.
(13) Enter A34 : DM VR 3 of the maintenance mode.
(14) METAL Y, Sub adjustment
For DNW-A22
Confirm that the data value of A34 : DM VR 3 : SUB METAL-Y-A and SUB METAL-Y-B are AF.
If not, set them to AF.
For DNW-A22P
(i)
Connect the oscilloscope’s CH-2 to TP2/DM-89(E-1). GND: E702/DM-89(D-1)
(ii) Adjust the level difference at 12 MHz use 2 MHz as the reference.
Adjustment point: A34 : DM VR 3 : SUB METAL-Y-A
Specification:
C =
+
16.5
±
1.0 dB
(iii) Set the data value of A34 : DM VR 3 : SUB
METAL-Y-B to the identical data value as SUB
METAL-Y-A.
(15) To exit A34 : DM VR 3, press the MENU button once.
(16) Disconnect the shorting clip from TP4/DM-89(E-1).
DM-89 Board (Side A)
[dB]
B
2
12
[MHz]
A(
*
)MAG: 1 dB
0
[dB]
B
2
12
[MHz]
0
A(
*
)MAG: 1 dB
[dB]
C
2
12
[MHz]
0
A(
*
)MAG: 2 dB
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
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
6-3. DM-89 Board Replacement