Tape Deck Adjustments - Sanyo DC-F430AV Service Manual

TAPE DECK ADJUSTMENTS
Adjustment Item Test Tape Measuring Srevice Mode Adjust Adjust
Instrument location value
(1)
HEAD AZIMUTH V-IT-736 AC-voltmeter HEAD AZIMUTH Max.
TAPE "A" (1OKHZ) SCREW (FWDIREV)
(2) HEAD AZIMUTH vl-r-73B AC-voltmeter HEAD AZIMUTH
—
Max.
TAPE "B" (1OKHZ) SCREW
(3-a) MOTOR SPEED
MTT-211 FREQUENCY COMPUTER REC VR311 (TAPE "A") 3,000Hz
(HIGH) (1,500Hz) COUNTER (HIGH)
VR313 (TAPE "B)
(3-b) MOTOR SPEED
MlT-l 11 FREQUENCY COMPUTER REC VR312 (TAPE "A") 3,000Hz
(NORMAL) (3,000Hz) COUNTER (NORMAL)
VR314 (TAPE "B")
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 llAI1
1. Load a test tape (VTT-738, etc.:l OKHz) for azimuth
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.
.
TAPE "A"
PLAY HEAD
k
(ELLOWT
rRED
WHITE
TAPE "B"
R / P HEAD
'"cKeED
~ E. HEAD
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"
w
1. Load a test tape for (VTT-738, etc.:l OKHz)azimuth
u\ .\
adjustment.
2. Press the FORWARD PLAY button.
3. Azimuth screw adjustment.
4. Press the STOP button.
= PUSH
r ———— ———— ———— —.
1
After making the adjustment, secure the azimuth
I
w
I
adjustment screw by applying screw lock (TB-1 401 B). 1
L ——— ——— ——— ——— ——— .—
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