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6-3. DM-89 Board Replacement
(51) Enter A34 : DM VR 3 of the maintenance mode.
(52) Connect the oscilloscope's CH-2 to TP2/DM-89(E-1). GND: E702/DM-89(D-1)
(53) OXIDE Y, Sub adjustment
(i) Adjust the level difference at 8 MHz use 2 MHz as the reference.
Adjustment point: A34 : DM VR 3 : SUB OXIDE-Y-A
Specification: DNW-A22:
DNW-A22P: C = +17.0 ± 0.5 dB
[dB]
C
0
2
8
DNW-A22
(ii) Set the data value of A34 : DM VR 3 : SUB OXIDE-Y-B to the identical data value as SUB
OXIDE-Y-A.
(54) Eject the alignment tape CR5-2A/CR5-2A PS.
(55) To exit A34 : DM VR 3, press the MENU button once.
(56) Disconnect the shorting clip from TP4/DM-89(E-1) and E702/DM-89(D-1).
(57) Reset S101/DM-89(E-6) and S301/DM-89(A-5) to NOR (right) side.
(58) Reset No.1 and No.3 of S901/DM-89(A-1) to OFF (down side).
Setting of the OMC DC offset [to step (60)]
(59) Enter A35 : DM VR 4 of the maintenance mode.
(60) Confirm the setting data of following items of A35 : DM VR 4.
Item of A35 : DM VR 4
OMC DC METAL-Y
OMC DC METAL-C
OMC DC OXIDE-Y
OMC DC OXIDE-C
(61) To exit A35 : DM VR 4, press the MENU button
once.
Data save [to step (64)]
(62) Enter A3F : NV-RAM CONTROL of the mainte-
nance mode, then execute "SAVE ALL ADJUST
DATA".
(63) Check that the message "Save Complete" is displayed
on the video monitor.
(64) To exit A3F : NV-RAM CONTROL, press the
MENU button once.
6-38
C = +14.0 ± 0.5 dB
A(*)MAG: 2 dB
[MHz]
Setting data
E4
D0
D0
D0
[dB]
C
0
2
8
DNW-A22P
A
B
C
D
RV704
RV703
OFF
D902
ON
E303
TP8
TP7
TP6
TP5
S501
S901
OFF
E702
E901
TP705
TP704
E701
TP703
TP702
RV501
TP701
RV507
RV702
TP305
TP700
TP306
RV701
TP208
RV401
RV301
RV302
RV303
RV304
RV402
S302
S301
RV406
TEST
NOR
RV407
E302
TEST
NOR
TP303
TP304
RV405
TP403
TP404
TP302
TP300
E301
DM-89 Board (Side A)
A(*)MAG: 2 dB
[MHz]
DM-89
E
F
G
ON
RV504
E105
TP4
TP1
RV503
A No.
LOTNO,
S NO,
1
TP3 TP2
2
TP505
TP503
TP504
3
TP502
E501
RV502
TP501
RV506
TP500
TP105
TP106
4
TP506
RV305
RV105
RV102
RV104
RV306
RV106
RV107
RV307
RV101
RV103
RV202
5
RV201
RV308
RV108
E104
E102
TP104
S102
S101
TP103
NOR
TEST
RV211
RV212
TP102
6
TEST
NOR
E103
TP202
RV205
TP204
TP100
TP203
E101
7
E902
DNW-A22/A22P
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