Sony hcd mj1 service manual

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Ð 2 Ð TABLE OF CONTENTS Specifications ............................................................................... 1 1. SERVICING NOTES.................................................. 4 2. GENERAL Index to parts and Controls .................................................... 5 3. DISASSEMBLY 3-1. Case (Top) Section and Plate (T back) Ornamentel Removal ............................... 8 3-2. Main board,Tuner board and Display board Removal .... 8 3-3. CD Mechanism, MD Mechanism and Digital board Removal .................................................... 9 4. DISC TABLE GETTING OUT PROCEDURE ON THE POWER SUPPLY IS OFF....................... 10 5. TEST MODE............................................................. 11 6. ELECTRICAL ADJUSTMENTS..................................... 14 7. EXPLANATION OF IC TERMINALS ...................... 22 8. DIAGRAMS 8-1. Block Diagram ÐMain SectionÐ ................................. 30 8-2. Block Diagram ÐMD SectionÐ ................................... 33 8-3. Circuit Boards Location .............................................. 37 8-4. Printed Wiring Boards ÐMain SectionÐ ...................... 38 8-5. Schematic Diagram ÐMain SectionÐ .......................... 41 8-6. Schematic Diagram ÐDigital SectionÐ ....................... 46 8-7. Printed Wiring Boards ÐDigital SectionÐ ................... 51 8-8. Printed Wiring Boards ÐBD : MD SectionÐ ............... 54 8-9. Schematic Diagram ÐBD : MD SectionÐ ................... 57 8-10. Schematic Diagram ÐDisplay SectionÐ ...................... 61 8-11. Printed Wiring Boards ÐDisplay SectionÐ .................. 65 8-12. Schematic Diagram ÐBD : CD SectionÐ .................... 70 8-13. Printed Wiring Boards ÐBD : CD SectionÐ ................ 73 8-14. IC Block Diagram ....................................................... 75 9. EXPLODED VIEWS 9-1. Cabinet Section ............................................................. 79 9-2. Chassis Section-1 .......................................................... 80 9-3. Chassis Section-2 .......................................................... 81 9-4. MD Mechanism Section (MDM-2ER) ......................... 82 9-5. Base Unit Section (MD) (MBU-2) ............................... 83 9-6. CD Mechanism Section-1 (CMD-5BD19) ................... 84 9-7. CD Mechanism Section-1 (CMD-5BD19) ................... 85 10. ELECTRICAL PARTS LIST............................................ 86 Amplifier section DIN power output 30 W + 30 W (6 ohms at 1 kHz, DIN) Continuous RMS power output US, Canadian model : 30 W + 30 W (6 ohms at 40Hz-16kHz, 1.0% THD) 35 W + 35 W (6 ohms at 1kHz, 5% THD) POPO 350W Except US, Canadian model : 40 W + 40 W (6 ohms at 1 kHz, lO% THD) Music power output 70W+70W (6 ohms at 1 kHz. lO% THD) Inputs TAPE (phono jacks): voltage 250 mV impedance 47 kilohms Outputs TAPE (phono jacks): voltage 250 mV impedance 1 kilohms PHONES (stereo phone jack): accepts headphones of 8 ohms or more. Supplied accessories Sony RM-SMJI Remote (1) Sony lithium battery. CR2025 (1 ) FM lead aerial (1) AM loop aerial (1) Speaker cords (2) General Power requirements Destination Power Power requirements consumption US, Canadian model 120V AC,60Hz 95W AEP, UK, German 220-230V AC, 50/60Hz 95W Italian model E, Singapore,110-120V/ 220-240V AC, Hong Kong model50/60Hz Adjustable with 95W the Voltage Selector Dimensions Approx. 430 x 95 x 290 mm (17 x 3 3/4 x 11 1/2 inches) (w/h/d) incl. projecting parts and controls Mass Approx. 7.0 kg (15 Ib 7 oz) Design and specifications are subject to change without notice.

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Ð 3 Ð MODEL NO. HCD-MJ1 MODEL IDENTIFICATION US, Canadian model : AC120V Ú60Hz AEP, UK, German, Italian model : AC220-230V Ú50/60Hz Hong kong, Sinagpore mdel : AC110-120V/AC220-240V Ú50/60Hz FLAT COMPONENT SYSTEM Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. This Compact Disc player is classified as a CLASS 1 LASER product. The CLASSLASER PRODUCT label is located on the rear exterior. For customers in Europe This caution la- bel is located insuide the unit. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation expo- sure. SAFETY CHECK-OUT After correcting the original service problem, perform the follow- ing 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 0.5mA (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 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 0.75V, 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) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage.AC Voltmeter (0.75V) 0.15 µF1.5k ½ To Exposed Metal Parts on Set 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. 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.