Sanyo MCD-UB575M, Service Manual

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DECK ADJUSTMENTS

1. HEAD REPLACEMENT

After replacement, demagnetize. The heads by using a degausser.

Be sure to clean the heads before attempting to make any adjustments.

All wiring should be returned to the original position after work is completed.

2. HEAD AZIMUTH ADJUSTMENT

(1) Load the test tape(STT-113CN,etc., 8KHz) for azimuth

adjustment.

(2) Press the PLAY button.

(3) Use a cross-tip screwdriver to turn the screw for azimuth

adjustment so that left and right output are maximized

(4) Press the STOP button.

(5) After completion of the adjustment, use thread lock (TB-1401B)

to secure the azimuth-adjustment screw.

3. MOTOR REPLACEMENT

4. AC BIAS FREQUENCY ADJUSTMENTS

(1) connect counter to T801(BS);

(2) R/P swith in recording state;

(3) Adjusting T801 use a plastic screw, AC bias frequency: 80KHz.

5. MOTOR SPEED ADJUSTMENT

(1) Insert the test tape(MTT-111N,etc., 3,000 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

become 3,000 Hz .

6. CHECKING THE MECHANISM TORQUSE AND TENSION

REW

55 gf or more

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F.FWD

55 gf or more

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PLAY

30-70 gf.cm

1.5 - 5 gf.cm

70 gf or more

Cassette of

measurement

PLAY:TW-2111A

F.FWD/REW:TW-2231

PLAY:TW-2111A

Drive-power cassette

TW-2412

Measurement

Take-up torqe

Back tension

Tape tension