Teac V-909RX - Reel Torque

| V-909RX/V-707RX/V-707R
4 MECHANICAL ADJUSTMENTS AND CHECKS
EAB OD BARE CHEE
4-1 REEL TORQUE
1.
Load
a
cassette
torque
meter
on
the
deck
and
read
the
pointer
indication on the dial scale of the meter for each tape tranport
operation. The measured torque should be within the following
values:
Take-up (FWD/REV): 35 to 55 g-cm(0.49 to 0.76 oz-inch)
(The variation of the pointerindication
should be within 15 g-cm).
Supply (FWD/REV): 2.2 to 4.5 g-em(0.031 to 0.062 02-inch)
(The variation should be within 1 g-cm)
F.F. and REW: 80 to 150 g-cm(1.1 to 2.1 02-inch)
4-2
PINCH
ROLLER
PRESSURE
1.
With
the
cassette
holder
closed
and
no
tape
loaded,
put
the
deck
in the forward play mode.
.
Hook
a
spring
scale
on
the
right
pinch
roller
assembly.
3.
Pull
the
scale
down
until
there
is
sufficient
force
to
separate
the
pinch
roller
from
the
capstan
shaft.
4.
Release
the
pressure
until
the
pinch
roller
makes
just
enough
contact
with
the
capstan
shaft
for-the
pinch
roller
to
begin
to
turn.
At
this
point,
note
the
reading
on
the
scale.
It
should
be
290
g
+
40g
(8.8
02
to
11.6
02.)
5.
Repeat
the
above
procedure
with
the
following
exceptions.
Tape
motion:
Reverse
play
mode
Pinch
roller:
Left
side
N
4-3 TAPE SPEED
Note:
The
following
checks
should
be
performed
for
both
forward
and
reverse
play
operations.
1.
Connect
a
frequency
counter
to
the
deck
as
shown
in
Fig.
4-2.
2.
Play
a
tape
for
more
than
five
minutes
to
warm
up
the
deck,
then
load
a
TEAC
MTT-111
test
tape
containing
a
3000
Hz
test
tone
and
play
the
test
tape.
3.
The
following
adjustment
should
be
made
at
the
beginning
of
reverse
play
(When
the
tape
is
fully
wound).
Use
a
common
slotted
screwdriver
with
the
handle
completely
insulated
from
the
blade
and
adjust
the
control
on
the
capstan
motor
(see
Fig.
3-6)
for
a
reading
of
3000
Hz
+5
Hz
on
the
frequency
counter.
4.
Play
the
tape
from
the
beginning
to
the
end,
and
check
that
the
speed
never
deviates
more
than
+45
Hz
from
3000
Hz,
nor
drifts
more
than
30
Hz
at
any
given
time.
Check
also
that
the
speed
differences
between
forward
and
reverse
play
measured
at
the
beginning,
middle,
and
end
of
the
tape
are
within
1%
(30
Hz).
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Oveiilator Frequency Counter
Wow &
Flutter Meter