SONY CSDXD51
Manual de Servicio

CSD-XD51

Power output 4.5 W + 4.5 W (at 3.2 ohms, 10% harmonic distortion (DC)) Power requirements For CD stereo radio cassette recorder: 120V AC, 60 Hz 9 V DC, 6 size D (R20) batteries Power consumption AC 17 W Battery life For CD stereo radio cassette recorder: FM recording Sony R20P: approx. 12 h Sony alkaline LR20: approx. 34 h Tape playback Sony R20P: approx. 5.5 Ah Sony alkaline LR20: approx. 15.5 h CD playback Sony R20P: approx. 2.5 h Sony alkaline LR20: approx. 12 h Dimensions Approx. 552 x 271 x 318 mm (w/h/d) (21 3� x 10 5� x12 1� inches) (incl. projecting parts)
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NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, �metallized� knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

Mass Approx. 5.4 kg (11 lb. 14 oz) (incl. batteries) Supplied accessory AC power cord (1) Design and specifications are subject to changewithout notice.

LEAKAGE
The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers� instructions to use these instruments. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. Flexible Circuit Board Repairing � Keep the temperature of soldering iron around 270�C during repairing. � Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). � Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement � Never reuse a disconnected chip component. � Notice that the minus side of a tantalum capacitor may be damaged by heat. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The �limit� indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal Parts on Set

0.15 µF

1.5 k�

AC Voltmeter (0.75 V)

Earth Ground Fig. A. Using an AC voltmeter to check AC leakage.

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