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4-3-6. ADJUSTMENT OF THE REV.
TENSION SENSOR POSITION
<<TOOL>>
Tension Sensor
Adj.
Fixture ;
VFK0578
Tension Post
Adj.
Plate
;
VFK0236
Fine
Adj.
Screwdriver ;
VFK0330
Digital Volt Meter ; Purchase locally
<<NOTE>>
Assemble a Tension Sensor Adjustment Fixture
(VFK0578)
and
a Tension Post
Adj
Plate
(VFK0236)
as shown in Figure M41.
Tension
Sensor
Adj.
Fixture
(VFK0578)
Tension Post Adj.
Plate (VFK0236)
Figure
M41
1.
Remove the Top
Plate
and
Cassette Holder
Unit.
(refer
to Disassemble Procedures)
<<NOTE>>
Do
not
disconnect 4Pin (exept
2P)
flat wire from connector
P1508 on the right side
of
Cassette Compartment.
2.
Push
the Sub Wiper
Arm
(R)
to direction of Cassette
loading.
Then
the Sub Wiper
Arm
(R)
goes down itsedlf
and
mode of machine change to
STOP.
3.
Turn
the Power switch
off.
4.
Remove the Cassette Compartment (refer to
Dis-
assmbly Procedures)
and
disconnect
4Pin
flat
wire
form
P1508.
5.
Connect the
V.T.V.M.
or
D.V.M.
to
TP2502
on
the
Reel
Servo
C.B.A.
7.
Place the Tension Post Position Adjustment
Plate
with
the Fixture over the
reel
tables
as
shown
in
Figure
M42.
Figure
M42
4-14
8.
Turn
the Power switch
on.
9.
Slightly loosen 2 screws
(C).
Insert a
Fine
Adj.
Screw-
driver
In
the hold
(D).
(Figure
M43)
~(D)
I
Tension Spring
Screw
(C)
Figure
M43
10.
Adjust the
Rev
Sensor Position so that measurement
becomes
D.C.
2.0V to
2.5V.
11.
Remove the Tension Sensor Fixture .
12.
Reinstall the Cassette Compartment.
13.
Confirm Playback picture
(Rev
Playback mode,
Play-
back mode etc.)
4-3-7. ADJUSTMENT OF THE
FG
HEAD
GAP
<<SPEC>>
0.17mm to 0.18mm
1
. Slightly loosen 2 screws. (Figure
M44)
2.
Put
the paper which
is
used for cover page of this vol-
ume
into the gap between
F.G.
Head and Capstan rotor.
(The
thickness of the cover page
Is
approx. 0.17mm).
3.
After adjustment, tighten 2 screws.
Screws
Gap:
0.17mm-0.18mm
Figure
M44
<<NOTE>>
Do not touch
the
surface
of
rotor
and
keep any magnetizable
material away.
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