Sony mz n 420 d service manual

Page 1

2 MZ-N420D SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PA RTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUM- BERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE- MENTS PUBLISHED BY SONY. A TTENTION AU COMPOSANT AYANT RAPPORT Ã- LA SÉCURITÉ! LES COMPOSANTS IDENTIFÉS 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 PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY. M odulation systemEFM (Eight to Fourteen Modulation)Number of channels2 stereo channels 1 monaural channel F requency response20 to 20,000 Hz ± 3 dBOutputsi : stereo mini-jack, maximum output level 5 mW + 5 mW, load impedance 24 -„¦ (US) 5 mW + 5 mW, load impedance 16 -„¦ (EXCEPT US) General Po wer requirements One LR6 (size AA) alkaline battery (not supplied) Recommended temperature for chec k-in/check-out +5 °C (+41 °F) or higherDimensions s Mas Approx. 106 g (3.8 oz) the player only Approx. 113.3 g (4.0 oz) the player only Design and specifications are subject to change without notice. Supplied accessoriesHeadphones/earphones (1) Dedicate d USB cable (1) CD-ROM (SonicStage Ver. 2.0 and MD Simple Burner Ver. 2.0) (1)* Battery life 1) *Do not play a CD-ROM on an audio CD player. 1)When using a new Sony LR6 (size AA) STAMINA alkaline dry battery (produced in Japan). Wh en SP Stereo LP2 Stereo LP4 Stereo playing 2) 2)Me asured in accordance with the JEITA (Japan Electronics and Information Technology Industries Association) standard. Appr ox. 42 hours Approx. 48 hours Approx. 56 hours transferring out audio data from th e computer 3) 3)The numbers of tracks that can be checked out differs according to the computers operating environment. 75 tracks (of about 5 minutes each) 300 tracks (of about 5 minutes each) 600 tracks (of about 5 minutes each) Recordable disc (US and Canadian models only) (1) Approx. 81 × 28.9 × 74.4 mm (w/h/d) (3 1/4 × 1 3/16 × 3 in.) without projections. Left - hand model Left - hand model Approx. 81 × 30.7 × 74.4 mm (w/h/d) (3 1/4 × 1 1/4 × 3 in.) without projections. Right - hand model Right - hand model

Page 2

3 MZ-N420D CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. 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. Flexible Circuit Board Repairing -K eep the temperature of the soldering iron around 270 ËšC dur- ing 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. UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size) : LEAD FREE MARK Unleaded solder has the following characteristics. - Unleaded solder melts at a temperature about 40 ËšC higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 ËšC . Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! - Strong viscosity Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. - Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. 1. SERVICING NOTES ....................................................... 4 2. GENERAL ........................................................................\ .. 5 3. DISASSEMBLY 3-1. Case (Low er).................................................................. 7 3-2. Upper Panel Section....................................................... 7 3-3. LCD Module, Button (Control)..................................... 8 3-4. MAIN Board ................................................................... 8 3-5. Mechanism Deck (MT-MZN710-177).......................... 9 3-6. Set Chassis Assy............................................................. 9 3-7. OP Service Assy (LCX-5R) ......................................... 10 3-8. Holder Assy .................................................................. 11 3-9. DC Motor (Sled) (M602)............................................. 11 3-10. DC Motor (Over Write Head Up/Down) (M603), DC SSM18B Motor (Spindle) (M601)...................... 12 4. TEST MODE .................................................................... 13 5. ELECTRICAL ADJUSTMENTS ............................... 18 6. DIAGRAMS 6-1. Block Diagram ............................................................. 38 6-2. Printed Wiring Board - MAIN Board (Side A)........... 39 6-3. Printed Wiring Board - MAIN Board (Side B)........... 40 6-4. Schematic Diagram - MAIN Board (1/4).................... 41 6-5. Schematic Diagram - MAIN Board (2/4).................... 42 6-6. Schematic Diagram - MAIN Board (3/4).................... 43 6-7. Schematic Diagram - MAIN Board (4/4).................... 44 7. EXPLODED VIEWS 7-1. Case Section ................................................................. 55 7-2. Chassis Section ............................................................. 56 7-3. MAIN Board Section................................................... 57 7-4. Mechanism Deck Section-1 (MT-MZN710-177) ........ 58 7-5. Mechanism Deck Section-2 (MT-MZN710-177) ........ 59 8. ELECTRICAL PARTS LIST ....................................... 60 TABLE OF CONTENTS