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
CD PICK-UP MAINTENANCE
About pick-up (Optical lens) Cleaning Clean a lens with swab of the cotton which moistened it with alcohol, cleaning paper or cleaning disc appointed. Specified cleaning disc : LC-1 (Part code : 645 026 1961 ..... manufactured by SANYO.) Show a clean procedure in the following in reference by swab of cotton. 1. Cotton swab is wrapped with Cleaning paper. 2. Add the isopropyl alcohol. 3. Gently move the tip of cotton swab just like a draw a whirlpool from inside to outside on the surface of lens.
TAPE ADJUSTMENTS
a. Replacing the head
1. 2. 3. 4. After replacement, demagnetize the heads by using 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-channels oscilloscope). All wiring should be returned to the original position after work is completed.
R / P HEAD
RED WHITE
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 motor
MOTOR SPEED ADJUSTMENT
1 3
YELLOW
EARTH
2 4 4
b. Adjusting head azimuth
1. 2. 3. Load a test tape (VTT-738, etc. :10kHz) for azimuth adjustment. Press the PLAY button. 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.
Measurement Take-up torque Cassette for PLAY : TW-2111A measurement F.FWD/REW : TW-2231 PLAY F.FWD/REW 30 ~ 70gr.cm 55 gr or more Back tension PLAY : TW-2111A 1.0 ~ 6.0gr.cm Tape tension Drive-power cassette TW-2412 80 gr or more -
e. Checking the mechanism torques
� Clean the head, capstan and pinch roller before making any measurement.
