Sharp GF-6060H - Page 9

@ PAUSE TIMING ADJUSTMENT (Refer to Figure 9—1)
1.
Place
this
unit
in
playback
mode.
Then,
check
the
gap
between
the
pin
on
the
pause
lever
and
pause
lock
lever.
The
gap
should
be more
than
0.2mm.
2.
Next,
push
tne
pause
key
slowly
and
check
that
the
pressure
roller
and
take-up
idler
are
simultaneously
apart
from
the
capstan
and
take-up
turntable.
3. If it is not satisfied in step 2, adjust it by bending the (A)
part of the pause lever.
Take-up turntable
Take-up idler
Pause
lock
lever
More than 0.2mm
Figure 9—1
—- 8
& TAPE SPEED ADJUSTMENT (Refer to Figure 9—2)}
1. Connect a frequency counter, across a resistor (8 ohms,
2W, +5%), to the EXT. speaker socket (J105 or J106).
2. Play a test tape (MTT-111; —10 dB, 3 kHz) at its start
and end points, and adjust the semi-variable resistor
so that the frequency counter reads 2955 to 3040 Hz
— using a bladed screwdriver via the hole at the motor’s
bottom.
EXT SP
(J105, J106)
Frequency
Counter
test tape
MTT-111 {— bladed screwdriver
hole
motor
Figure 9-2
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT (Refer to Figure 9—3).
.
Connect
load
resistor
(8
ohm)
to
the
External
Speaker
Jacks
(J105,
J106)
and
connect
outputs
of
both
the
right
and
left
channels to the vertical and horizontal input terminals of oscilloscope.
. Place the unit in PLAYBACK mode.
ORWN
left.
oO
.
Set
the
Volume
Control
in
the
maximum
and
Tone
Control
in
the
fully
clockwise.
.
Insert
the
test
tape
(MTT-113,
6.3
kHz,
—10dB
Recorded).
.
Adjust
the
head
azimuth
adjustIng
screw
so
that
Lissajou’s
waveform
attains
the
maximum
and
the
same
phase
in
right
and
.
Even
without
using
the
oscilloscope,
also
adjust
the
head
azimuth
adjusting
screw
so
that
outputs
of
both
the
right
and
left
channels attain the maximum and the same phase in right and left.
EXT. SP
PLAYBACK mode (J106)
AC V.T.V.M.
OSCILLOSCOPE
Figure 9—3
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