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Laser Beam Safety Precaution; Tape Adjustments - Sanyo DC-DA1160 Service Manual

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LASER BEAM SAFETY PRECAUTION

• Pick-up that emits a laser beam is used in this CD player section.
CAUTION :
THIS PRODUCT CONTAINS A LOW POWER LASER DEVICE,
TO ENSURE CONTINUED SAFETY DO NOT REMOVE ANY
COVERS OR ATTEMPT TO GAIN ACCESS TO THE INSIDE
OF THE PRODUCT.
REFER ALL SERVICING TO QUALIFIED PERSONNEL.
LASER OUTPUT .............. 0.6 mW Max. (CW)
WAVELENGTH .................. 790 nm
CAUTION – INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL – USYNLIG LASER STRÅLING VED ÅBNING, NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION, UNDGÅ UDS ÆTTELSE
FOR STRÅLING.
VARNING – OSYNLIG LASER STRÅLNING NÄR DENNA DEL ÄR ÖPPNAD
OCH SPÄRR ÄR URKOPPLAD. STRÅLEN ÄR FARLIG.
VORSICHT – UNSICHTBARE LASERSTRAHLUNG TRITT AUS, WENN
DECKEL GEÖFFNET UND WENN SICHERHEITSVERRIEGELUNG
ÜBERBRÜCKT IST. NICHT, DEM STRAHL AUSSETZEN.
VARO – AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA
NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.

TAPE ADJUSTMENTS

a. Replacing the head
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.
b. Adjusting head azimuth
1.
Load a test tape (VTT-738, etc. :10kHz) for
azimuth adjustment.
2.
Press the PLAY button.
3.
Use a cross-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.
4.
Press the STOP button.
R / P HEAD
RED WHITE
YELLOW
EARTH
e. Checking the mechanism torques
- 1 -
c.
Adjusting motor speed
1. Insert the test tape (MTT-111 or etc. 3,000 Hz).
2. Press the PLAY button.
3. Use a flat-tip screwdriver to turn the SVR to adjust so
that the frequency counter becomes 3,000 Hz.
4. Press the STOP button.
d.
Replacing the moto
MOTOR SPEED
ADJUSTMENT
1
• Clean the head, capstan and pinch roller before making
any measurement.
Measurement
Take-up torque
Cassette for
PLAY : TW-2111A
measurement F.FWD/REW : TW-2231
PLAY
30 ~ 70gr.cm
F.FWD/REW
55 gr or more
BEAT CUT
1–
2–
(4 MIN)
3
2
4
4
Back tension
Tape tension
PLAY : TW-2111A
Drive-power cassette
TW-2412
1.0 ~ 6.0gr.cm
80 gr or more
-
-

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