.-
V
‘APE DECK ADJUSTMENTS
‘REPARATION FOR ADJUSTMENTS
AC; vCXTME T:R
, SCC+E >
1)
2)
3)
4)
5)
6)
7)
8)
9)
I)
pleasuring instruments, tools.
Test tape
MTT-114N (10
kHz)
r;il pill
-.—
TCW-211 (1,500 Hz) (Optional)
MTT-111 (3.000 Hz)
TCC-130 (DOLBY TAPE)
AC-224 (NORMAL)
OEcrrP.C.B
f
AC-5 13 (CrOz)
o
CNO06
o-
“0
L-CH E R-CH
o
Oscilloscope : (At least 10MHZ, dual channel)
TAPE OUT
Digital voltmeter (Input impedance 1MQ or more)
Automatic distortion analyzer or AC voltmeter
(–80dB, input impedance 1MQ or more)
AF-oscillator (400 Hz, 500mV RMS)
Frequency counter (5MHz; or more)
o
Frequency counter, probe.
1
Screwdrivers (non-metallic) for adjustments.
DC digital voltmeter
HEAD REPLACEMENT AND AZIMUTH ADJUSTMENT
A)
1.
2.
3.
4.
B)
1.
2.
3.
4.
c)
1.
2,
3.
4.
5.
6.
Head replacement
After replacement, demagnetize the heads by us-
ing a degausser.
Be sure to clean the heads before attempting
to
make any adjustments.
Be sure both channels (1 and 2) are the same level
(Using a dual-channel oscilloscope).
All wiring should be returned to the original posi-
tion after work is completed.
-..
Phase alignment
Prepare a dual-channel oscilloscope.
Set so that the left and right ranges of the oscillo-
scope are the same.
Play the test tape (MTT-1 14N, etc.: 10 kHz).
Adjust so that the waveforms for the left and
right channels are in alignment, as shown in the il-
lustration.
TAPE “ A “, “ B “Head azimuth adjustment
Load a test tape in Tape Deck * A “
(MTT-114N, etc.: 10 kHz) for azimuth adjust-
ment.
Press the PMY (>) button.
Use a flat-tip (–) screwdriver to turrr the screw
for normal azimuth adjustment so that the left
and right outputs are maximized et the same
phase during playback.
Press the STOP button.
Repeat procedure for tape Deck” B‘.
After completion of the adjustment. use thread-
Iock (TB 1401 B) to secure the azimuth-adjustm-
ent screws.
TAPE “A”
PLAY HEAD
RED
WHITE
FROM CNO09(4P)
BLACK
CONNECTOR
..
....
.-.-- .-
TAPE “B’”
E. HEAD R/P
HEAD
SROWN
WHITE
PINK
YELLOW
RED
ra
f. ~ J
FROM CNO1O(7P)
AT
CONNECTOR
BLUE BLACK
~PLP.. .
TAPE ‘W
AZIMUTH
A
..
:’,
.,. .
...
,.
.’...
. ..
,.-.
..
.;:-..
.:
–9–
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