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7-5. Check of Self-recording Tape
Playback
Equipment and Tools
. RF extension tool
. Blanking tape
. Oscilloscope
. Alignment tape, XH2-1AST
Setting
1. Connect the RF extension tool to CN775 of RP-
91 board.
2. Connect the oscilloscope as follows.
CH1:
RF/RF extension tool (RF waveform)
CH2:
JSW/RF extension tool (Switching
waveform)
Trigger: CH2
3. Insert the blanking tape into the unit.
4. Select maintenance menu No. 604-10, center ITI
mode for tracking adjustment.
(Refer to Section 7-2.)
5. Set the REC mode, and record the center ITI
10 MHz single signal to the tape from the top for
three to ten minutes.
Checking Method
1. Set the unit in PLAY mode and playback the
portion recorded in the setting step 5.
2. Check to see that the tape runs correctly along
the TG-2 lower flange, the TG-3 upper flange,
the TG-5 upper flange, and the TG-7 upper
flange, and that no curls are found on the TG-1
upper flange, and the TG-8 upper flange.
(Refer to Sections 7-1-5 and 7-1-6.)
3. Verify that the RF waveform on the oscilloscope
meets the specification. (Refer to Fig. 1)
4. If the RF waveform does not meet the
specification, re-perform the adjustments,
Section 8-3 Tracking Adjustment, and the
following 1 and 2.
1 In case that the RF waveform on the entrance
side does not meet the specification during self-
recording tape playback (Refer to Fig. 1)
. Adjust the RF waveform on the entrance side to
become flat by performing the tracking
adjustment, and raise the RF waveform on the
entrance side within the specification by turning
the flange of the TG-3 guide counterclockwise.
(Refer to Fig. 2)
DSR-570WS/570WSP V1
400 us
1350 us
140 us
70 us
C
B
D
(b)
(c)
(d)
Specification
B > 0.65 A
C > 0.75 A
D > 0.8 A
E > 0.75 A
Overall max. value
Min. value between sections (b) : B
Min. value between sections (c) : C
Min. value between sections (d) : D (Excluding between sections (f))
Min. value between sections (e) : E
Adjustment for step 4-1
Entrance
8
Adjustment for step 4-2
Exit
8
Specification
(Emax - Emin) < 0.2 Emax (Less than 20% of Emax)
2400 us
700 us
60 us
E
(f)
(e)
: A
Fig-1
Emin
Emax
Fig-2
A
7-15
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