Sony mds je 480 service manual
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2 MDS-JE480 SAFETY CHECK-OUT After correcting the original service problem, perform the fol- lowing safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, metallized knobs, screw\ s, and all other exposed metal parts for AC leakage. Check leakage as described below. 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 microampers). 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. 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 pas- sive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A) Fig. A. Using an AC voltmeter to check AC leakage. 0.15 µF To Exposed Metal Parts on Set 1.5kΩ AC voltmeter (0.75V) Earth Ground This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radia- tion exposure. 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. 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 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 Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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. This caution label is located inside the unit. V er 1.1 2003.04
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3 MDS-JE480 SELF-DIAGNOSIS FUNCTION The self-diagnosis function consists of error codes for customers which \ are displayed automatically when errors occur, and erro r codes which show the error history in the test mode during servicing. For details on\ how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes durin\ g servicing, refer to the following Procedure for usin g the Self- Diagnosis Function (Error History Display Mode). Self-diagnosis function The decks self-diagnosis function automatically checks the condition of the MD deck when an error occurs, then issues a three- or five-digit code and an error message on the display. If the code and message alternate, find them in the following table and perform the indicated countermeasure. Should the problem persist, consult your nearest Sony dealer. Th ree- or five- di git code/ Message Cause/Remedy C11/Protected , Ta ke out the MD and close the record- protect slot. C12/Cann ot Copy Y ou tried to record a CD with a format that the exte rnal device connected to the deck does not support, such as CD-ROM or video CD. , Remo ve the disc and insert a music CD. C13/REC Error , Se t th e deck in a stable surface, and repeat the recording procedure. Th e inserted MD is dirty (with smudges, fing erprints, etc.), scratched, or substandard in quality. , Replace the disc and repeat the recording procedure. C13/Read Error , Ta k e out the MD and insert it again. C14/Toc Error ,Insert another disc. , If possible, erase all the tracks on the MD . C41/Cann ot Copy The sound source is a copy of commercially available music software, or you tried to record a CD-R (Recordable CD). , The Seri al Copy Management System prevents making a digital copy . Yo u cannot record a CD-R. C71/Din Unlock Th e sporadic appearance of this message is caused by the digital signal being recorded. This will not affect the recording. While recording from a digital component connected through the DIGITAL IN connector, the digital connecting cable was unplugged or the digital component turned off. , Connect the cable or turn the digital component back on. E0001/ MEMORY NG There is an error in the internal data that the deck needs in order to operate. , Consult your nearest Sony dealer. E010 E0201 LOADING NG 1/ LASER NG There is a problem with the optical pickup. , The op tical pick-up may have failed. Consult your nearest Sony dealer. Three- or five- digit code/ Message Cause/Remedy There is a problem with the loading. , The loading may have failed. Consult your nearest Sony dealer. Procedure for using the Self-Diagnosis Function (Error History Display Mode). Note: Perform the self-diagnosis function in the error history display mod\ e in the test mode. The following describes the least req uired procedure. Be careful not to enter other modes by mistake. If you set ot\ her modes accidentally, press the MENU/NO button to e xit the mode. ADVARSEL Eksplosjonsfare ved feilaktig skifte av batteri. Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten. Brukte batterier kasseres i henhold til fabrikantens instruksjoner. ADVARSEL! Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med batteriaf samme fabrikat og type. Levér det brugte batteri tilbage til leverandøren. CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturers instructions. V ARNING Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en likvärdig typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt gällande föreskrifter. VAROITUS Paristo voi räjähtää, jos se on virheellisesti asennettu. V aihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.