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TAPE
ADJUSTMENTS
Measuring
instructions,
tools
(1) AF VTVM
(6) TEST
TAPE, HEAD AZIMUTH
(7)
(2) FREQUENCY
COUNTER
Using tape : Mini-cassette
tape of
(3) OSCILLOSCOPE
18 ~ thick (A-BEX
SSC-1 584, etc.)
(4) DC POWER
SUPPLY:
3.OV
Recording
signal :4 kHz
(5) DUMMY
LOAD, 4 ohms
Recording
Lebel :-10
dB
Recording
Tape speed :4.75 cm I sec.
.
a.
HEAD
REPLACEMENT
AND
AZIMUTH
ADJUSTMENT
(a)
Head
Replacement
w
TEST TAPE, MOTOR
SPEED
Using tape : Mini-cassette
tape of
18 ~ thick (A-BEX
SSC-1582,
etc.)
Frequency
of Recorded
Linear Sweep
Signal :4,575-3,925
Hz
Recording
Lebel :-10
dB
Recording
Time :84.5 sec.
Recording
Tape speed :4.75 cm I sec.
After replacement,
demagnetize
the heads by using a
~
I "''PLAY
"AD
head eraser.
Be sure to clean the heads before attempting
to make
any adjustment.
(b) Head
Azimuth
Adjustment
(1) Load the test tape (A-BEX
SSC-I 584, etc.) for azimuth
adjustment.
(2) Press the PLAY button.
(3) Use a cross-tip screwdriver
to turn the screw for
azimuth adjustment
so that the outputs maximized.
(4) After completion
of the adjustment,
use thread lock
(TB-1 401 B) to secure the azimuth-adjustment
screw.
b. MOTOR
SPEED
ADJUSTMENT
(1) Insert the test tape (A-BEX
SSC-1 582, etc.).
(2) Press the PLAY button.
(3) Use a cross-tip screwdriver
to turn the P501 to adjust
so that the frequency
counter becomes
3,000 Hz.
c.
CHECKING
THE
MECHANISM
TORQUES
(1) Play mode
. . . . . . . .
more than 40 g-cm
(2)
(3)
Fast Forward mode
.
more than 45 g-cm
Rewind mode
. . . . .
more than 40 g-cm
MOTOR
SPEED
ADJUSTMENT
w
HEAD
AZIMUT:
ADJUSTMENT
-
:,
-3-
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