Sony SRW-5000, Руководство по обслуживанию, Страница: 344 / 438

6-14
SRW-5000/5500
. Alignment tape : HR2-1B (00:00 to 20:00)
S802-1/SS-95 board : ON (Tracking VR : Enabled)
<SS-95 board, side A>
TG-0 TG-1
<Fig.2> CH-1 : TP52/EQ-94 board
<Fig.3> CH-1 : TP52/EQ-94 board
A
B
RF max
A = RF max x 0.8
(B is 80 to 90 % of A)
<Fig.1>
No contact
Tape
Upper flange of TG-2
Marker
Marker
A B C D E F G H J K L M N
S802 RV1001 (Tracking VR)
P
1
2
RF max
If the pressure against the
tape at TG-1 is too much,
the waveform becomes as
shown in the upper figure.
(NG)
If the pressure against the
tape at TG-2 is too much,
the waveform becomes as
shown in the upper figure.
(NG)
TG-2
height adjustment nut TG-1
height adjustment nut
The RF envelope waveform is flat.
Spec.9 :
A B
C D E F G H
J
K L M
N P
1
2
TP52 TP5
<EQ-94 board, side A>
CH-1 : TP52/EQ-94 board (CNF CG ENV signal)
CH-2 : TP5/EQ-94 board (SWP5 signal)
TRIG : CH-2
.
Connection of the oscilloscope
1. Adjust the Tracking at the Tape
Entrance Side
(1) Set Bit-1 of the DIP switch S802 on the SS-
95 board to ON (upper side) to enable the
tracking control.
(2) Play back the alignment tape HR2-1B (00:00
to 20:00) in the PLAY mode.
(3) Rotate the tracking VR (RV1001/SS-95
board) clockwise to set the center of the RF
envelope waveform to 80 % of the maximum
output level.
(4) Loosen the height adjustment nut of TG-2
(rotate it counterclockwise) so that the tape
does not in contact the upper flange. (Fig. 1)
(5) Rotate the height adjustment nut of TG-1 to
make the RF envelope waveform as shown in
Fig. 2.
n
If this adjustment is performed again because
the specification 10 described after was not
satisfied, rotate the height adjustment nut of
TG-1 a little with the RF envelope waveform
appearing as in Fig. 2, to make the level B of
the entrance side higher than before.
(6) Rotate the height adjustment nut of TG-2
clockwise to adjust the height of TG-2 until
the waveform satisfies the specification 9.
(Fig. 3)
If the waveform does not satisfy the specifi-
cation (does not become flat), perform the
following adjustment (
1
and
2
), and return
to step (4).
1
Clean the lower drum lead with a wooden
stick. (Refer to Section 4-2-5.)
2
While running the tape, press the tape lightly
with the wooden stick and check that the tape
does not float from the lead.
Tracking Adjustment at Tape Entrance Side (PLAY)