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Sanyo TRC-3640 Service Manual page 3

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ADJUSTMENTS
Measuring
instructions,
tools
(6) TEST TAPE,
HEAD AZIMUTH
(7) TEST TAPE,
MOTOR SPEED
(1)
(2)
(3)
(4)
(5)
a.
(a)
AF VTVM
Using tape : Mini-cassette
tape of
Using tape : Mini-cassette
tape of
FREQUENCY
COUNTER
18 pthick(
A-BEX SSC-1584, etc.)
18 ,Uthick( A-BEX SSC-1 582, etc.)
OSCILLOSCOPE
Recording
signal :4 kHz
Frequency
of Recorded
Linear Sweep
DC POWER SUPPLY ; 3.0 V
Recording
Lebel :-10 dB
Singal :4,575-3,925
Hz
DUMMY LOAD,
4 ohms
Recording
Tape speed :4.75 cm fsec.
Recording
Lebel :-10 dB
Recording
Time :84.5 sec
Recording
Tape speed :4.75 cm/sec.
HEAD REPLACEMENT
AND AZIMUTH
ADJUSTMENT
Head replacement
After replacement,
demagnetize
the heads by using a
head eraser.
Be sure to clean the heads before attempting
to make any
adjustments.
(b)
(1)
(2)
(3)
(4)
b.
(1)
(2)
(3)
c.
Head azimuth adjustment
Load the test tape (A-BEX SSC-1 584,, etc. )
for azimuth adjustment.
Playback the test tape..
Use a cross-tip
( + ) screwdriver
to turn the screw for azimuth
adjustment
so that the outputs maximized.
After completion
of the adjustment,
use thread lock
(TB-1 401 B)
to secure the azimuth adjustment
screw.
MOTOR
SPEED
ADJUSTMENT
Load the test tape (A-BEX SSC-I 582,, etc.).
Playback the test tape..
Use a cross-tip
( - ) screwdriver
to turn the P501 to adjust
so that the frequency
counter becomes
3,000 Hz.
CHUCKING
THE
MECHANISM
TORQUE
(1) Playback mode
. . . .
more than 40 g-cm
(2) Fast Forward mode
.
more than 45 g-cm
(3) Rewind mode
. . . . . .
more than 40 g-cm
PARTS LIST
E. HEAD
R/P
HEAD
HEAD
AZIMUTH
ADJ
CAUTION: Regular type resistors and capacitors are not listed.
To know those values, refer to the schematic diagram.
PACKING
& ACCESSORIES
~
620 208 0512
620 219 3335
620 210 1453
620 148 6216
614 268 2098
Description
CARTONCASE
PAO,STYROFOAM
PAD,PLAIN, UNIT
POLY COVER.
POLY COVER
INSTRUCTION MANUAL
-2-

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