Table Of Contents; 1) When Using A New Sony Lr6 (Size Aa) Alkaline Dry Battery; Produced In Japan; 2) Measured In Accordance With The Jeita (Japan Electronics And Information - Sony MZ-NH600D Service Manual

MZ-NH600D
1)
Battery life
When playing continuously in Hi-MD mode
Disc type Linear PCM
1GB Hi-MD disc
Approx.
11.0 hours 2)
60/74/80-minute Approx.
standard disc 9.5 hours 2)
1)
When using a new Sony LR6 (size AA) alkaline dry battery

(produced in Japan)

2)
Measured in accordance with the JEITA (Japan Electronics and Information

Technology Industries Association) standard.

When playing continuously in MD mode
Disc type SP stereo
60/74/80-minute Approx. 20.5 hours Approx. 24.5 hours Approx. 27.0 hours

standard disc

Design and specifications are subject to change
without notice.

TABLE OF CONTENTS

1. SERVICING NOTES
2. GENERAL
................................................................... 4
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 5
3-2. Case (Lower) Section ...................................................... 6
3-3. MAIN Board .................................................................... 6
3-4. Case (Upper) Section ....................................................... 7
3-5. Mechanism Deck Section (MT-MZNH900-181),
MD Standard Pin ............................................................. 7
3-6. Set Chassis Assy .............................................................. 8
3-7. Gera (BSA), Gera (SB) ................................................... 8
3-8. Op Service Assy .............................................................. 9
3-9. DC MOTOR SSM18D/C-NP (SPINDLE) (M701), DC
MOTOR (SLED) (M702), DC MOTOR Unit
(Over Write Head Up/Down) (M703) ............................. 9
3-10. Holder Assy ..................................................................... 10
4. DIAGRAMS
4-1. Block Diagram -MD SERVO Section - ......................... 11
4-2. Block Diagram -POWER SUPPLY Section - ................ 12
4-3. Printed Wiring Board -MAIN Section (1/2) - ................ 14
4-4. Printed Wiring Boards -MAIN Section (2/2) - ............... 15
4-5. Schematic Diagram -MAIN Section (1/8) - ................... 16
4-6. Schematic Diagram -MAIN Section (2/8) - ................... 17
4-7. Schematic Diagram -MAIN Section (3/8) - ................... 18
4-8. Schematic Diagram -MAIN Section (4/8) - ................... 19
4-9. Schematic Diagram -MAIN Section (5/8) - ................... 20
4-10. Schematic Diagram -MAIN Section (6/8) - ................... 21
4-11. Schematic Diagram -MAIN Section (7/8) - ................... 22
4-12. Schematic Diagram -MAIN Section (8/8) - ................... 23
5. EXPLODED VIEWS
5-1. Case (Lower) Section ...................................................... 34
5-2. Case (Upper) Section ....................................................... 35
5-3. Chassis Section ................................................................ 36
5-4. Mechanism Deck Section (MT-MZNH900-181) ............ 37
6. ELECTRICAL PARTS LIST
2
Hi-SP Hi-LP
Approx. Approx.
21.5 hours 2) 25.5 hours 2)
Approx. Approx.
20.0 hours 2) 24.5 hours 2)
LP2 stereo LP4 stereo
............................................... 3
................................ 38
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
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 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.
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 °C 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 °C.
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 viscou-s (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.
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
À 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.