Audiomatic A-900 Handbuch - Seite 8
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Remove baseplate
overlaY
(12).
8.
Remove
the two
serewsr
located
at
front of
base-
plate,
holding
unit in
cabinet.
9.
Removethefour
screqrs
holding
"U"
shaped
bracket
in
storage
compartment.
Remove
"U"
shaped
bracket
from
storage
comPartment.
10.
Remove
the
four
s
crevfs holding the
two
sub-panels
to the
rear
panel"
11.
Push
the
two
sub-panels through
the
holes
in
the
rear
of the
ca.binet.
12.
Lift
tape
transport
and
amplifier
assembly
part-
ially
out
o]
cabinet.
Unplug
four
speaker
leads
and
speaker
monitor
plug
before
removing
unit completely'
To
Remove
Amplifier
From
Transport Mechanism
1.
Remove
the
motor
and
power
transformer plug from
the
amplifier
chassis"
2.
Remove
the four
hea.d
leads
from
the
play-record
head
terminals.
3.
Remove
tnto screws
from
each
end
of amplifier
chassis.
4. Carefullylifttheamplifier
away
from
the
transport
mechanism
and
disconnect the
play-record switch arm
link
(104).
MECHAN
I
CAL
A
DJ
U
STMENTS
Pressure
Pad
Adjustment
(
Refer
to
Exploded
View)
1,
Remove
front
escutcheon
(11).
2. Depress
the
PLAY
button.
Do not
turn the Audi-
omatic tbn".
3.
Useapenciltype postal scale
and
check
the
amount
of
pressure
necessary
to
just pull the right-hand
pad
awayfrom
the
play-record
head
(57)"
The
test
should
be
made
at the
right-hand
end
of
ttre
pressure
pad
mounting
spring.
If
necessary,
adjust
locked adjust-
ment
scielv'(42iuntil
a reading
of
t
3/4'oz.
*l/4-oz'
is
obtained.
4" The
guide
post pressure
pad
(Ieft-hand
pad)
is
ad-
justed
by
bending the
pressure
pad
spring
(35).
Ad-
just
for
minimum
pressure
against tape.
Erase
Head
Adjustment
1.
With
tape
properly
thr
eaded,
turn
r
ecorder'bn
"
and
depress
the
RECORD
button.
Allow
tape
to run
for
a
f
err
seconds
then
turn
recorder 'bff
",
but
leave RECORD
button depressed.
2. With
front
escutcheon (11)
and
rear
escutcheon
(6)
removed, checkerase
tread (52)
to
see
if it
is parallel
with
the
taPe.
3" Check
to
see
if
the
top
edge
of
the tape coincides
rvith
the
top
end
of
the diagonal
slot in the
erase
head
TAPE
I
Fig.
3.
Erase head tape Path.
(junctionof long
diagonat
slot
and
short
vertical
slot).
See
Figure
3.
To
adjust the
level of
the tape, loosen
set screw
(44)
and
rotate
tape guide
post
(45)
to
move
tape
up
or down.
See
H<Ploded
View.
Brake
Shoe
Adjustment
(
Ref
er to
ExPloded
View)
1. Withall
pushbuttons
in
the
'tp"
position,
the
brake
pads (90)
should
clear brake drums
(10?
and 109)
by
approximately
t/8",
2.
DepresstheSTOP
button
while observing
the
brake
pads.
Both
brake
pads
must
contact the
brake
drums
at
the
same
time
and
with
equal
pressure.
3.
If
necessary, adjust
by bending
brake spring
(91).
ING
accumulation
should
be
periodically
removed
since
it
will
cause
faint
recording
and
poor
playback'
Wipe
these surfaces carefully with
a clean
cloth. If dirt
is
caked
or
hard
and
will
not
come
off with
a
dry
cloth,
dampen cloth
with
alcohol
or lighter fluid.
CLEAN
The majority
of
defects,
other
than wear
or
breakage, can
be
traced to
dirty surfaces.
The
play-
recordtread (5?), capstan,
andpressureroller
(67)
are
subjectto
an
accumulation
of
tape coating
oxide,
which
is
worn
off
the
tape as
it
passes these
parts.
This