Sony mz r 70 service manual

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-“ 2 -“ Flexible Circuit Board Repairing - Keep the temperature of the 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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY DIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE, OR LOSSES OR EXPENSES RESULTING FROM ANY DEFECTIVE PRODUCT OR THE USE OF ANY PRODUCT. MD WALKMAN is a trademark of Sony Corporation.This MiniDisc player is classi- fied as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior. Dimensions Approx. 81 × 74 × 26.2 mm (w/h/d) (3 1/4 × 3 × 1 1/16 in.) without projections. Mass Approx. 115 g (4 oz) the recorder only Approx. 155 g (5.4 oz) incl. a recordable MD, and NC-WMAA nickel cadmium rechargeable battery Supplied accessories AC power adaptor (1) Headphones with a remote control (1) Optical cable (1) NC-WMAA nickel cadmium rechargeable battery (1) Rechargeable battery carrying case (1) Carrying pouch (1) Design and specifications are subject to change without notice. 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. ATTENTION AU COMPOSANT AYANT RAPPORT Ã- LA SÉCURITÉ!! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

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-“ 3 -“ 1. SERVICING NOTE ......................................................... 4 2. GENERAL ......................................................................... 5 Looking at the Controls ........................................................ 5 Recording an MD Right Away! ............................................ 6 Playing an MD Right Away! ................................................. 7 3. DISASSEMBLY ............................................................... 8 3-1. Block Assy, Bottom .............................................................. 8 3-2. Panel Block Assy, Upper ....................................................... 8 3-3. LCD Module ......................................................................... 9 3-4. Main Board ........................................................................... 9 3-5. MD Mechanism Deck ......................................................... 10 3-6. Service Assy, OP ................................................................. 10 3-7. Holder Assy ......................................................................... 11 3-8. Motor Flexible Board .......................................................... 11 3-9. Motor, DC (M602) .............................................................. 12 3-10. Motor, DC (M601), Motor, DC (M603) .................... 12 4. TEST MODE ................................................................... 13 4-1. Outline ................................................................................. 13 4-2. Test Mode ............................................................................ 13 4-3. Manual Mode ...................................................................... 14 4-4. Overall Adjustment Mode ................................................... 15 4-5. Sound Skip Check Result Display Mode ............................ 16 4-6. Self-diagnosis Display Mode .............................................. 17 4-7. Key Check Mode ................................................................. 19 TABLE OF CONTENTS 5. ELECTRICAL ADJUSTMENTS .............................. 20 5-1. Outline ................................................................................. 20 5-2. Precautions for Adjustment ................................................. 20 5-3. Adjustment Sequence .......................................................... 20 5-4. NV Reset ............................................................................. 20 5-5. Power Supply Manual Adjustment ...................................... 20 5-6. Temperature Correction ....................................................... 22 5-7. Overall Adjustment Mode ................................................... 22 5-8. Laser Power Check ............................................................. 23 6. DIAGRAMS ..................................................................... 25 6-1. Block Diagram -“ MD Section -“ .......................................... 25 6-2. Block Diagram -“ Audio Section -“ ...................................... 27 6-3. Block Diagram -“ Power Supply Section -“ .......................... 29 6-4. Printed Wiring Board -“ Main Board -“ ................................ 31 6-5. Schematic Diagram -“ Main Board (1/3) -“ .......................... 35 6-6. Schematic Diagram -“ Main Board (2/3) -“ .......................... 37 6-7. Schematic Diagram -“ Main Board (3/3) -“ .......................... 39 6-8. IC Block Diagrams .............................................................. 41 6-9. IC Pin Descriptions ............................................................. 44 7. EXPLODED VIEWS ..................................................... 51 7-1. Cabinet Section ................................................................... 51 7-2. Mechanism Deck Section ................................................... 52 8. ELECTRICAL PARTS LIST ...................................... 53