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TAPE ADJUSTMENTS
Adjustment
Item
I
Test
Tape
I
Measuring
Instrument
(a)
HEAD AZIMUTH
VT1738 etc.
AC+oltmeter
DECK "A"
(1 OKHZ)
(b)
HEAD AZIMUTH
I
vl1738 etc.
I
AC-voltmeter
DECK "B"
(l OKHz)
(c) MOTOR SPEED
I
MlT-l 11
FREQUENCY
(NORMAL)
(3,000Hz)
COUNTER
1.
HEAD REPLACEMENT
AND AZIMUTH ADJUSTMENT
(1) 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.
L
L
(Using a dual-channels
oscilloscope).
4.
All
wiring should be returned to the original position after
work is completed.
(2)
Head azimuth
.
DECK IIW
1.
Remove
the left side of
CASSETTE
LID.
2. Load a test tape
(VTT-738,etc.:
10kHz)
for azimuth
adjustment.
3. Press the PLAY button.
4. 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.
5. Press the STOP
button.
DECK "B"
1. Remove the right side of CASSEITE
LID.
2. Load a test for azimuth adjustment.
3. Press the PLAY button.
4. Azimuth screw adjustment.
5. Press the STOP button.
Output
connection
Adjust
Adjust
location
value
SPEAKER TERMINAL
HEAD AZIMUTH
I
Max.
SCREW
SPEAKER TERMINAL
HEAD AZIMUTH
I
Max.
SCREW
SPEAKER TERMINAL
VR311
3,000Hz
'5
TAPE "B"
IUP HEAD
S
RED
YELLOW
WHITE
EARTH
.
After making the adjustment,
secure the azimuth
adjustment screw by applying screw lock (TB-1401 B).
-4-
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