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BOTTOM V
I
Er/V
0F
MECHAN
I
SM
the
pinch
roller
(Il4)
is lifted
away
f
rom
the
Capstan
(ll5), the tension
should
be
between
I
and 2
pounds.
If
adjustment
is
necessary
turn the
hex nut
(I29) clockwise
to
increase tension
and
counterclockwise
to
decrease
tension. If
adjustment
was made,
the 'Tape
Speed
Ad-
justment" must
be
checked.
Pressure
Pad
Setthe Selector
control toForward Position
and
turn the Fast Forward lever to Fast Forward.
Adjust
the
position of
t}re
pressure
pad
retainer
(128)
bV
turning retaining screw
(134)
so the
proper
distance
between
the
f
ront sur{ace of the
pads
and the
heads
(ll0
and
126)
is
L/
4".
Tighten
hex
nut
(133).
Adjust the
angle
of
lug
(124)
so pads
are parallel
to the
heads
(lI0
and
126).
Record Switch
Arm
When
the Recorder
is in
the record
mode
the
record switch arm
(62)
is locked
against
the
switch
lock
arm
(52).
The distance
between
the
outer
edge
of
the re-
cord switch arm
(62) and
the switch lock
arm
(52)
protrusion,
should be about
L/
64
to
3/ 64
inch.
Adjust screw
(68) Iocated
on
the switch lever
(69)
and
lock
it
in
place
with the adjustment
nut.
Play-Record
Head
Thread agoodprerecorded
tapeon
the
recorder.
While playing
back, adjust the head
mounting
screws
for
the
proper
position of
the
head
which
will
give maximum
output.
The adjusting screws must
be
tight
when
adjustment
is
completed.
Erase
Head
The
erase
head
(126)
should be adjusted
so
that
it
effects
just
the top
half of the recorded
tape.
This
adjustment
should
be
made
in Record posi-
tion.
Loosen
the erase
head
adjusting
screws,
and
adjust
head
to
aposition where only
the top
half of
the
tape
will
be
erased. The adjusting screws must
be
tight
when
adjustment
is
completed.
Record Bias Adjustments
Set
the
Selector
to Record position
and
tape
speed
for
3
3/
4'".
Adjust
Al for
45 volts
Rn[,S
aeross
the
Recordr/
Play
head.
Bias
Frequency
Adjustment
Set
the Selector to Record position and adjust
A2
for
bias
frequency
of
30KC
+
2KC.
Record
Level Indicator Adjustment
Inject
a
1000
cycle signal into either
Input
jack
with
the Selector set
to
Record. Adjust
R2
until the
neon
lamp lights
with
Il
to
l5 volts
of signal
level at
pin
6
(plate) of V2
(I2AUT).
3o
oo
E3
'o
H3
o
I
rTI
n
6
Page
5
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