Sanyo MCH-900F - Tape Deck Adjustment

ii
TAPE DECK ADJUSTMENTS
u
a. HEAD REPLACEMENTA NDHEADA ZIMUTHADJUSTMENT
(a) HEAD REPLACEMENT
. Af[er replacement, demagnetize the heads by using a degausser.
. Be sure to clean [he heads be[ote attempting to make any adjustments.
.
All wiring should be returned to the original posilion after work is completed
E. HEAD
RIP HEAD
BLACK
wHITE
RED YELLOW
**
*
I
/
WHiTE
(b) HEAD AZIMUTH ADJUSTMENT
(1)
HEAD AZIMUTH ADJ
(2)
(3)
(4)
(5)
b.
(a)
Load the test tape ( VTT-703, etc., 10 kHz ) for azimuth
adjustment.
Press the PLAY
button.
Use a cross-tip screwdriver to turn
the screw for azimuth
.
/
adjustment so that the left and right output are maximized.
Press the the STOP button.
Arler completion of the adjustment, use thread lock (TB-1401 B)
to secure the azimuth-adjustment screw.
<<*3
MOTOR REPLACEMENT AND SPEED ADJUSTMENT
\y/
MOTOR REPLACEMENT
MOTOR SPEED ADJ
/
—
(b) MOTOR SPEED ADJUSTMENT
(1) Insert the test tape ( MIT-ill N, etc., 3000 Hz ).
(2) Press the PLAY
button.
(3) Use a flat-tip screwdriver to turn the SVR (located inside the rear
of the
motor) to adjust SVR so that the frequency counter
becomes 3,000 Hz.
c.
●
CHECKING THE MECHANISM TORQUES AND TENSION
Clean the head, caps!an and pinch roller before making any measurement.
Measurement Take-up torque
Back tension
Tape
tension
Cassette for
PLAY: TW-21 11A
Drive-power cassette
PLAY: TW-21 11A
measurement
F. FWD/REW:TW-2231
TW-2412
PLAY 30-60
gr.cm
2.O-4.5 gr.cm
60
gr or more
F.FWD
55- 120gr cm
REW
55- 120gr cm
-7-