Dokorder 7700 - Brake Mechanism

(2)
Set the
deck in
play
mode and
pull
the spring balance
gently
in the direction
indicated by the arrow
in
Fig.5-5
(B)
and check that the take-up
torque
is nearly 150
g
(450
g.cm).
N ote
(1)
The hold-back tension
in
both
the FF and
REW modes are
determined
by a
fixed wire-wound resistor;
therefore,
there is no
need
to
adjust,
but do check
that the
hold-back tension
is 90
g.
cm.
(2)
When the
adjustment
has
been completed,
paint-lock
the
Iock t.t.*
(E.
5.4
BRAKE
MECHANISM
4 1 BRAKE
BAND
a. Specification
1
-
1.5
mm
(0.04
-
0.06
inch) space
between
the
brake
drum
@
and the brake
band
@.
b. Adjustment
Adjust the
set
position
of the
bracket
@.
f.
R eferen ce
Refer to
Fig.5-6 or section 2 on
page
M-16.
Special
Tools
and/or lnstruments
required
None
Pre
parati
on
Remove
the
front
panel
(including
pinch
roller
and
head cover).
F
ix the
auto shut-off
arm
ON by
a
piece
of
sticking
tape.
Proced u re
(1)
Push
the
play
and
stop buttons
alternately
several
times and
check the
movement
of the
brake
band
(4).
'!L
L
c-
d.
e.
?
(2\
(3)
Push the
play
button
once again
and
loosen the two
lock_screws
@
securing
the
bracket
@
to
that the
space
between rhe
brake band
@
and the
brake drum
@
will be from
1 to
1.5
mm
(0.04
-
0'06
inch).
(Moving
the bracket
in
the
directin
of arrow
@
will
increases
the space
@)
Keeping
the tape
deck in the
stop
mode,
push
the
brake
linkage ()
downward
by
hand, check
that the
brake
band
@
contacts the
inside
of the
brake band
guide
(5)
uniformly
and that
the space
between the
brake
drum
@
anO the
brake
band
@
is also uniform.
g.
Note
When the
adjustment
has been
completed,
paint-lock
the two
lock screws
@
4-2 STROKE
OF
BRAKE
SOLENOID
a. Specification
Stroke
of
plunger
1
-
1.5
mm
(0.04
-
0.06
inch).
b. Adjustment
Adjust
the set
position
of the
brake
solenoid
O.
c.
Reference
Refer to
Fig.5 7 or section
2 on
page
M-16.
d.
Special
Tools
and/or
lnstruments
required
N one
e.
Preparation
Remove
the
front
panel
(including
pinch
roller
and
head cover).
Fix the
auto shut-off
arm
ON
by a
piece
oi
sticking
tape.
f. Procedure
(1)
Push the
play
and stop
buttons
alte
nately
and
check the
stroke of the
brake solen.id
plunger
@
{indi"ut.O
@
in
Fig.5-7).
L
@Lock
Screws
F iq.5-7
@
t
+
@
@Brake
Drum
Fis.5
6
@
Brake'Linkage
(2)
Loosen
two
lock ,.r.*,
@
and adjust
the
position
of the
solenoiO
@
to that the
operating stroke
o{
L