4-3-4. MEASUREMENT AND
ADJUSTMENT
OF THE BRAKE
TORQUE
<<TOOL>>
Torque Gauge ;
VFK0133
Adapter for Gauge ;
VFK0134
1.
Remove the top cover and the cassette compartment.
2.
Attach the adapter to the torque gauge
and
place the
deck
in
STOP
mode (Subloading mode).
3.
Place the torque gauge on the
reel
table
as
shown
in
Figure
M38.
The
weight of the gauge should not
rest
on
the
reel
table.
4.
Turn
the torque gauge
in
the direction indicated
in
Fig-
ure
M39
until the brake begins slipping
and
read
the
gauge.
Figure
M38
Measuring Method
B~A
A~B
Supply
Reel Takeup Reel
A
B
Takeup
more
than
50
g-om
more
than
550g-cm
Supply
more
than
40
g-em
Figure
M39
Specification of Brake Torque
5.
If
it
is
out of specification, replace the Brake Spring.
<<NOTE>>
If
the proper brake torque cannot be obtained
by
replacing
the
Brake Spring, clean the braking surface
of
the reel table with a
soft cloth
and
re-measure the brake torque.
If
its still out
of
specification, replace the Main Brake
(S)
or
(f)
Unit.
4-3-5. ADJUSTMENT OF PRESSING
FORCE OF PRESSURE
ROLLER UNIT
<<TOOL>>
Fan
Taype Tension Gauge ;
VFK66
Fine
Adj.
Screwdriver ;
VFK0330
VHS
180
min.
Cassette Tape
<<SPEC>>
930g
+/-
70g
1 . Remove the Cassette Compartment.
2.
Play
back the
end
portion of
VHS
(180
min.)
tape.
3.
Insert a
Fine
Adj.
Screwdriver
in
the hole
(C).
4.
Slightly losen the screw
(B).
5.
Set
the
Fan
Type Tension Gauge to the part
(A)
of Pinch
Roller
Unit.
6.
Press the
Arm
with the
Gauge,
In
the direction Indicated
by
the
arrow
as
show
in
Figure
M40.
7.
Adjust the Solenoid
Base
so that the reading of the
Tension Gauge
is
930g
+/- 70g
at
the moment of the
tape running stop.
Screw
(B)
Capstan
Shaft
Pressure Roller
Unit
Figure
M40
4-13
....
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en
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~
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(.)
z
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w
:E
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