Tape Adjustments - Sanyo MCD-Z165F Service Manual

I
TAPE ADJUSTMENTS
a. Adjusting Azimuth
Be sure to clean the heads before attempting to make any adjustment.
. Be sure both channel's waveform are the same for the phase matching.
Be sure both channels (1 and 2) are the same level using a dual-channel oscilloscope.
. After completion
of the adjustment, apply thethreadlock(TB-1401 B) to the azimuth adjustment screws to fix them securely.
(1)
(2)
(3)
(4)
b.
Load an azimuth adjustment test tape (VTT-703 etc., 10 kHz)
in tape deck.
Press the PLAY button.
Use a cross-tip screwdriver to turn the screw for azimuth
adjustment so that the left and right outputs are maximized.
Press the STOP button.
HEAD
AZIMUTH ADJ.
Replacing the Head
RIP
L-
After replacing the head, demagnetize the head by using a
degausser.
WHITE
\
i
HEAD
YELLOW
All
wiring should be returned to the original position after work is
completed.
c. Replacing the Motor
Q
o
'i
----D~Y=
EARTH
d. Adjusting Tape Speed
s Use a plastic screwdriver for adjustment.
(1) Inset the test tape (MTT-111 N etc., 3000 Hz).
(2) Press the PLAY button.
(3) Use a flat-tip screwdriver to turn the SVR to adjust so that the frequency
counter becomes 3000 Hz.
1 ,
n
—
3
MOTOR SPEED ADJ.
e. Checking the Mechanism Torques
Clean the head, capstan and pinch roller before making any measurement.
Measurement
Take-up torque Back tension Tape tension
Cassette for PLAY : TW-2111A
PLAY :TW-2111A
Drive-power cassette
measurement
F.FWD I REW : TW-2231 TW-2412
PLAY 30-60 gr.cm 1.5-4.5 gr.cm
60 gr or more
F.FWD 55-120 gr.cm
-— —
REw 55-120 gr.cm
—
—
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