Fisher MC-715 - NORMAL TAPE SPEED ADJUSTMENT; DOUBLE TAPE SPEED ADJUSTMENT

TAPE
DECK
ELECTRICAL
ADJUSTMENTS
ccontinuea)
NORMAL
TAPE
SPEED
ADJUSTMENT
Adjustment of 1 Side
.
Connect
a
frequency
counter
to
the
left
or
right
channel
output
of
the
headphone
jack
as
illustrated.
Then,
insert
a
3kHz
test
tape
(Example:
TEAC
MTT-111)
into
the
cassette
compartment.
Frequency Counter
3,000Hz (= 10Hz)
PHONES
Dummy Load 320
Remove
the
Turntable
Unit
and
adjust
the
tape
speed
by
_. DOUBLE TAPE SPEED ADJUSTMENT
1. Connect the frequency counter as the same way as the
normal speed adjustment. as
2. Unit is set a Double Speed Mode and two terminals on Tape
slowly
turning
the
potentiometer
inside
the
Motor
of
1
side
until
the
frequency
counter
reads
3,000Hz
(+10Hz).
Adjustment of 2 Side
Adjust
the
potentiometer
inside
the
Motor
of
2
side
by
following
the
same
procedure
as
in
1
side.
-21-
Control P.C.Board (shown below) are connected with wire.
Connected with wire.
TAPE CONTROL P.C.BOARD BOTTOM VIEW
First play back the test tape on Tape 1 side and observe the
figure of the Frequency Counter. Then play back the test
tape on Tape 2 side and adjust the VR1 until the figure of the
Frequency Counter shows —30Hz ~ OHz against on Tape 1.