Teac A-3300 - Pinch Roller Pressure Check and Adjustment

PINCH
ROLLER
PRESSURE
———----——___--__"-
wm
NOTE
Pinch
roller
pressure
is
supplied
by
the
pinch
roller
spring
arm
and
it
is
most
important
that
the
solenoid
plunger
be
fully
bottomed
before
taking
pressure
measurement.
Procedure For Check And Adjustment
Load
tape
or
block
the
shut-off
arm
in
the
on
position.
Attach a suitable spring scale to the pinch roller shaft.
Place the unit in the PLAY mode ( P ), and holding the spring
scale
as
illustrated,
slowly
draw
it
away
from
the
pinch
roller.
Do not allow the string to rub against the pinch roller.
Note
the
reading
on
the
spring
scale
at
the
instant
the
pinch
roller
stops
rotating.
The
scale
should
indicate
2.1.2.3
kg.
Optimum
value
is
2.2
kg.
If
adjustment
is
necessary,
loosen
the
three
screws
on
the
cap-
stan
solenoid
and
position
the
solenoid
for
optimum
pressure.
Adjust
solenoid
limit
position
so
that
the
GAP
between
capstan
shaft
and
pinch
roller
is
approximately
7mm
when
solenoid
is
not
actuated.
Limit
is
adjusted
by
loosening
the
mounting
screw
(A),
mount
slot
is
elongated,
slide
limit
until
proper
gap
is
obtained.
CAPSTAN
PINCHROLLER
D-II-13
Fig.
6-1
Pressure
Measurement
-Pinch
Roller-