Sony cfd zw 750 770
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Ð 2 Ð SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. General Speaker CFD-ZW750: Full range: 10 cm (4 in.) dia., 3.2 ohms, cone type (2) CFD-ZW770: Full range: 10 cm (4 in.) dia., 6 ohms, cone type (2) Outputs Headphones jack (stereo minijack) For 16 - 68 ohms impedance headphones Power output (excluding US model) CFD-ZW750: 2.3 W + 2.3 W (at 3.2 ohm, 10% harmonic distortion in AC operation) CFD-ZW770: 3.8 W + 3.8 W (at 6 ohm, 10% harmonic distortion in AC operation) Power requirements For CD radio cassette-corder: 120 V AC, 60 Hz 9 V DC, 6 size D (R20) batteries For memory back-up: 4.5 V DC, 3 size AA (R6) batteries For remote controller: 3 V DC, 2 size AA (R6) batteries Power consumption CFD-ZW750: AC 15 W CFD-ZW770: AC 28 W Battery life For CD radio cassette-corder:FM recording CFD-ZW750 CFD-ZW770Sony R20P: approx. 7.5 h approx. 3.5 hSony alkaline LR20: approx. 22 h approx. 10 hTape playbackSony R20P: approx. 7 h approx. 1.5 hSony alkaline LR20: approx. 20 h approx. 5 hCD playbackSony R20P: approx. 3 h approx. 1.5 hSony alkaline LR20: approx. 10 h approx. 4 h For memory back-up: approx. 1 year Dimensions Approx. 630 ´ 268 ´ 256 mm (w/h/d) (24 7/8 ´ 10 5/8 ´ 10 1/8 inches) (incl. projecting parts) Mass CFD-ZW750: Approx. 6.7 kg (14 lb. 12 oz.) (incl. batteries) CFD-ZW770: Approx. 7.9 kg (17 lb. 7 oz.) (incl. batteries) Supplied accessories AC power-cord (1) Remote controller (1) (RMT-CZW750A) Design and specifications are subject to change without notice. CAUTION Use of controls or adjustments or performance of proce- dures other than those specified herein may result in haz- ardous radiation exposure. Flexible Circuit Board Repairing ·Keep the temperature of the soldering iron around 270ûC 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 dam- aged by heat. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown 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 pick- up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ!! LES COMPOSANTS IDENTIFIƒS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIéCES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPLƒMENTS PUBLIƒS PAR SONY.
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Ð 3 Ð To Exposed Metal Parts on Set 0.15 mF 1.5k W AC voltmeter (0.75V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, ÒmetallizedÓ knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST 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 manufacturersÕ instructions to use these instruments. 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 ÒlimitÓ 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) CHUCK PLATE JIG ON REPAIRING On repairing CD section, playing a disc without the CD lid, use Chuck Plate Jig. ¥ Code number of Chuck Plate Jig: X-4918-255-1 LASER DIODE AND FOCUS SEARCH OPERATION CHECK 1. Turn on POWER button and press CD button to CD position. 2. Open the CD lid. 3. Turn on S801 as following figure. 4. Press the ( P (CD) button. 5. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto Power Control circuit or Optical Pick-up is broken. Objective lens moves up and down three times for focus search. S801 SERVICING NOTES