Tape Deck Adjustments - Sanyo DC-F430AV Service Manual

TAPE DECK ADJUSTMENTS

Adjustment Item
(1) HEAD AZIMUTH
TAPE "A"
(2) HEAD AZIMUTH
T A P E "B"
(3) MOTOR SPEED
(HIGH)
(3) MOTOR SPEED
(NORMAL)
1 . HEAD REPLACEMENT AND AZIMUTH ADJUSTMENT
(l)Head replacement
1. After replacement, demagnetize the heads by using a
degausser.
2. Be sure to clean the heads before attempting to make any
adjustments.
3. Be sure both channels (1 and 2) are the same level.
(Using a dual-channels oscilloscope)
4. All wiring should be returned to the original position after
work is completed.
(2)Head azimuth
TAPE "A"
l
1. Load a test tape (VTT-738, etc.:lOKHz)
adjustment.
2. Press the FORWARD PLAY button. (Normal playback)
3. Use a flat-tip (-) screwdriver to turn the screw for normal
azimuth adjustment so that the left and right outputs are
maximized at the same phase during normal playback.
4. Press the Tape "A" REVERSE MODE button.
5. Play the tape in the reverse mode.
6. Use a flat-tip (-) screwdriver to turn the screw for reverse
azimuth adjustment so that the left and right outputs are
maximized at the same phase during reverse playback.
7. Press the STOP button.
TAPE "B"
l
adjustment.
2. Press the FORWARD PLAY button.
3. Azimuth screw adjustment.
4. Press the STOP button.
Measuring
Test Tape
Instrument
VTr-738 AC-voltmeter
in-r-738 AC-voltmeter
FREQUENCY
M-IT-21 1
COUNTER
MTT-111 FREQUENCY
COUNTER
for azimuth
COMPUTER REC
(HIGH)
COMPUTER REC
(NORMAL)
TAPE "A"
PLAY HEAD
After making the adjustment, secure the azimuth
l
I
adjustment screw by applying screw lock (TB-1401 B).
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- : 3 _ -
Adjust
Adjust
location value
HEAD AZIMUTH
SCREW (FWDIREV)
HEAD AZIMUTH
SCREW
(TAPE "A")
(TAPE "B")
VR312 (TAPE "A")
VR314 (TAPE "B")
TAPE "B"
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