Sanyo TRC-7060 - Tape Adjustments; Head Replacement and Azimuth Adjustment; Motor Speed Adjustment; Checking the Mechanism Torques

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
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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
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HEAD AZIMUT: ADJUSTMENT - :,
-3-