Sony DNW-A100 Maintenance Manual page 50

3-5. RF System Alignment (EQ-56 Board)
3-5-3. Betacam / Betacam SP Format PB System (EQ RF Output Level) Adjustment
OXIDE C adjustment
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The connections and settings of the oscilloscope are
the same as "METAL C Adjustment".
22. Play back the 75% color-bar signal portion (0:00 to
3:00) of the following alignment tape in PLAY mode.
For DNW-A100/A50/A45:
For DNW-A100P/A50P/A45P: CR5-2A PS
23. To operate the maintenance mode, press the MENU
button once.
24. Set the oscilloscope's trigger to the _ slope, then
adjust the level of OXIDE C-A (ch-A of OXIDE C).
Adj. point: A30 : EQ VR : RF GAIN OXIDE C-A
Specification: C = 250 ± 20 mV p-p
25. Set the oscilloscope's trigger to the + slope, then
adjust the level of OXIDE C-B (ch-B of OXIDE C).
Adj. point: A30 : EQ VR : RF GAIN OXIDE C-B
Specification: C = 250 ± 20 mV p-p
26. While switching the polarity (_/+) of the oscillo-
scope's trigger slope, fine adjust the level difference
between the OXIDE C-A and OXIDE C-B until they
are identical amplitude.
27. To perform the tape operation, press the SET button once.
28. Stop the playback of the alignment tape.
A B C
RV704
RV703
D902
ON
E303
TP8 TP7 TP6 TP5
S901
OFF
E901
TP704
TP703
TP702
TP701
RV702
TP305
TP700 TP306
RV701
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)
3-14
CR5-2A
Center of V period
C
D DM-89 E F G
OFF ON RV504
E105
S501 TP3 TP2 TP1 RV503
A No. LOTNO, S NO,
TP4
E702
TP705
TP505
TP503 TP504
E701
TP502
E501
RV501 RV502
TP501
RV507 RV506
TP500
TP105
TP106
TP506
RV305 RV105
RV102 RV104
RV306 RV106
RV107
RV307
RV101 RV103
RV202
RV308 RV201
RV108 E104
E102
TP104
S102
TP103
TEST NOR
S101
RV211 RV212
TP102
NOR
TEST
E103
TP202 RV205
TP204
TP100
E101
TP203
E902
OXIDE Y adjustment
29. Change the connection of the oscilloscope as follows:
(Keep the setting of the oscilloscope.)
CH-1: TP100/DM-89(F-7), GND: E101/DM-89(F-7)
CH-2: TP4/DM-89(E-1), GND: E702/DM-89(D-1)
30 Play back the 75% color-bar signal portion (0:00 to
3:00) of the alignment tape CR5-2A / CR5-2A PS in
PLAY mode.
31. To operate the maintenance mode, press the MENU
button once.
32. Set the oscilloscope's trigger to the _ slope, then
adjust the level of OXIDE Y-A (ch-A of OXIDE Y).
Adj. point: A30 : EQ VR : RF GAIN OXIDE Y-A
Specification: D = 250 ± 20 mV p-p
33. Set the oscilloscope's trigger to the + slope, then
adjust the level of OXIDE Y-B (ch-B of OXIDE Y).
Adj. point: A30 : EQ VR : RF GAIN OXIDE Y-B
Specification: D = 250 ± 20 mV p-p
34. While switching the polarity (_/+) of the oscillo-
scope's trigger slope, fine adjust the level difference
between the OXIDE Y-A and OXIDE Y-B until they
are identical amplitude
35. To perform the tape operation, press the SET button
once.
36. Stop the playback of the alignment tape, then eject it.
37. To operate the maintenance mode, press the MENU
1
button once.
38. To exit A30 : EQ VR, press the MENU button once.
2
Data save (Store the adjusted data)
3
39. Enter A3F : NV-RAM CONTROL, then execute
"SAVE ALL ADJUST DATA".
. Message "Save Complete" is displayed on the video
4
monitor when this data save is completed normally.
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5
When loading the previous data without save the
current adjusted data, execute "ALL DATA PRE-
6
VIOUS".
40. To exit the maintenance mode, press the MENU
7
button four times.
Center of V period
D
DNW-A100/A50/A45
DNW-A100P/A50P/A45P