Sony mz nh 900 service manual

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MZ-NH900 2 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 the soldering iron around 270 ËšC 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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. 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 COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY. When recording continuously in MD mode (Unit: approx.hours)(JEITA) When playing continuously in Hi-MD mode (Unit: approx.hours)(JEITA) When playing continuously in MD mode (Unit: approx.hours)(JEITA) Battery life When recording continuously in Hi-MD mode (Unit: approx.hours)(JEITA 1)) Disc type Batteries Linear PCM Hi-SP Hi-LP 1GB Hi-MD disc NH-10WM 2) 3.5 5 6 LR6 3) 2.5 3.5 4 NH-10WM + LR6 6 8.5 10 60/74/80-minute standard discNH-10WM 3.5 5 6 LR6 4.5 7 8 NH-10WM + LR6 8 12 14 1)Measured in accordance with the JEITA (Japan Electronics and Information Technology Industries Association) standard. 2)When using a 100% fully charged nickel metal hydride rechargeable battery3)When using a Sony LR6 (size AA) STAMINA alkaline dry battery (produced in Japan) Disc type BatteriesSP Stereo LP2 Stereo LP4 Stereo 60/74/80-minute standard discNH-10WM 5.5 6.5 7.5 LR6 7 8.5 9.5 NH-10WM + LR6 12.5 15 17 Disc type Batteries Linear PCM Hi-SP Hi-LP 1GB Hi-MD disc NH-10WM 5 8.5 10 LR6 10 16 19 NH-10WM + LR6 15 24.5 29 60/74/80-minute standard discNH-10WM 5 8.5 11 LR6 9 14.5 19 NH-10WM + LR6 14 23 30 Disc type Batteries SP Stereo LP2 Stereo LP4 Stereo 60/74/80-minute standard disc NH-10WM 910.512 LR6 18 21 24 NH-10WM + LR6 27 31.5 36 On power sources -For use in your house: For the supplied battery charging stand, use the AC power adaptor supplied with this recorder. Do not use any other AC power adaptor since it may cause the recorder to malfunction. Polarity of the plug

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MZ-NH900 3 TABLE OF CONTENTS 1. SERVICING NOTES ................................................ 4 2. GENERAL ................................................................... 5 3. DISASSEMBLY 3-1. Disassembly Flow ........................................................... 7 3-2. Case (Lower) Block ......................................................... 8 3-3. MAIN Board .................................................................... 8 3-4. Upper Panel Block ........................................................... 9 3-5. Mechanism Deck (MT-MZNH900-181) ......................... 9 3-6. Battery Case Block .......................................................... 10 3-7. Gear (BSA), Gear (SB) ................................................... 10 3-8. OP Service Assy .............................................................. 11 3-9. DC Motor SSM18D/C-NP (Spindle) (M701), DC Motor (Sled) (M702), DC Motor Unit (Over Write Head Up/Down) (M703) ... 11 3-10. Holder Assy ..................................................................... 12 3-11. Position of Ferrite Core ................................................... 12 4. TEST MODE .............................................................. 13 5. ELECTRICAL ADJUSTMENTS ......................... 17 6. DIAGRAMS 6-1. Block Diagram -“MD SERVO Section -“ ......................... 23 6-2. Block Diagram -“AUDIO Section -“ ................................. 24 6-3. Block Diagram -“POWER SUPPLY Section -“ ................ 25 6-4. Schematic Diagram -“MAIN Section (1/9) -“ ................... 27 6-5. Schematic Diagram -“MAIN Section (2/9) -“ ................... 28 6-6. Schematic Diagram -“MAIN Section (3/9) -“ ................... 29 6-7. Schematic Diagram -“MAIN Section (4/9) -“ ................... 30 6-8. Schematic Diagram -“MAIN Section (5/9) -“ ................... 31 6-9. Schematic Diagram -“MAIN Section (6/9) -“ ................... 32 6-10. Schematic Diagram -“MAIN Section (7/9) -“ ................... 33 6-11. Schematic Diagram -“MAIN Section (8/9) -“ ................... 34 6-12. Schematic Diagram -“MAIN Section (9/9) -“ ................... 35 6-13. Printed Wiring Board -“MAIN Section (1/2) -“ ................ 36 6-14. Printed Wiring Board -“MAIN Section (2/2) -“ ................ 37 7. EXPLODED VIEWS 7-1. Case Section .................................................................... 49 7-2. Upper Panel Section ........................................................ 50 7-3. Chassis Section ................................................................ 51 7-4. Mechanism Deck Section (MT-MZNH900-181) ............ 52 6. ELECTRICAL PARTS LIST ................................ 53