background image
SERVICE MANUAL
PORTABLE MINIDISC PLAYER
US Model
Canadian Model
SPECIFICATIONS
MZ-NH600D
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength:
= 790 nm
Emission duration: continuous
Laser output: less than 44.6
µW
(This output is the value measured at a distance
of 200 mm from the lens surface on the optical
pick-up block with 7 mm aperture.)
Recording and playback time
When using HMD1G (1GB disc):
Maximum 34 hours in Hi-LP stereo
When using MDW-80 in Hi-MD mode:
Maximum 10 hours and 10 min. in Hi-LP
stereo
When using MDW-80 in MD mode:
Maximum 160 min. in monaural
Maximum 320 min. in LP4 stereo
Revolutions
380 rpm to 2,700 rpm (CLV)
Error correction
Hi-MD:
LDC (Long Distance Code)/BIS (Burst
Indicator Subcode)
MD:
ACIRC (Advanced Cross Interleave Reed
Solomon Code)
Sampling frequency
44.1 kHz
Sampling rate converter
Input: 32 kHz/44.1 kHz/48 kHz
Coding
Hi-MD:
ATRAC3plus (Adaptive TRansform
Acoustic Coding 3 plus)
MD:
ATRAC
ATRAC3
- LP2/LP4
Modulation system
Hi-MD:
1-7RLL (Run Length Limited)/PRML
(Partial Response Maximum Likelihood)
MD:
EFM (Eight to Fourteen Modulation)
Frequency response
20 to 20,000 Hz
± 3 dB
Outputs
i1): stereo mini-jack
Maximum output (DC)
Headphones:
5 mW + 5 mW (16
)
Power requirements
One LR6 (size AA) alkaline battery (not
supplied)
Operating temperature
+5
°C (+41°F) to +35°C (+95°F)
Dimensions
Approx. 83.6
× 28.9 × 77.0 mm (w/h/d)
(3 3/8
× 13/16 × 31/8 in.) (excluding projecting
parts and controls)
Mass
Approx. 99 g (3.5 oz) (the player only)
1)Measured in accordance with JEITA.
Supplied accessories
Headphones (US)
Earphones (Canadian)
Dedicated USB Cable
CD-ROM (Sonic Stage Ver. 2.0/MD Simple
Burner Ver. 2.0)*
*Do not play a CD-ROM on an audio CD player.
Ver. 1.2 2004.10
US and foreign patents licensed from Dolby
Laboratories.
Model Name Using Similar Mechanism
NEW
MD Mechanism Type
MT-MZNH900-181
Optical Pick-up Mechanism Type
ABX-U
9-877-841-03
2004J05-1
© 2004.10
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
· SonicStage, MD Simple Burner, OpenMG, "Magic Gate", "MagicGate Memory Stick",
"Memory Stick", Hi-MD, Net MD, ATRAC, ATRAC3, ATRAC3plus and their logos are
trademarks of Sony Corporation.
· Microsoft, Windows, Windows NT and Windows Media are trademarks or registered
trademarks of Microsoft Corporation in the United States and /or other countries.
· IBM and PC/AT are registered trademarks of International Business Machines Corporation.
· Macintosh is a trademark of Apple Computer, Inc. in the United States and/or other countries.
· MMX and Pentium are trademarks or registered trademarks of Intel Corporation.
· All other trademarks and registered trademarks are trademarks or registered trademarks
of their respective holders.
­ Continued on next page ­


background image
2
MZ-NH600D
TABLE OF CONTENTS
1.
SERVICING NOTES ............................................... 3
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.
TEST MODE .............................................................. 11
5.
ELECTRICAL ADJUSTMENTS ......................... 15
6.
DIAGRAMS
6-1.
Block Diagram ­MD SERVO Section ­ ......................... 19
6-2.
Block Diagram ­POWER SUPPLY Section ­ ................ 20
6-3.
Printed Wiring Board ­MAIN Section (1/2) ­ ................ 22
6-4.
Printed Wiring Boards ­MAIN Section (2/2) ­ ............... 23
6-5.
Schematic Diagram ­MAIN Section (1/8) ­ ................... 24
6-6.
Schematic Diagram ­MAIN Section (2/8) ­ ................... 25
6-7.
Schematic Diagram ­MAIN Section (3/8) ­ ................... 26
6-8.
Schematic Diagram ­MAIN Section (4/8) ­ ................... 27
6-9.
Schematic Diagram ­MAIN Section (5/8) ­ ................... 28
6-10. Schematic Diagram ­MAIN Section (6/8) ­ ................... 29
6-11. Schematic Diagram ­MAIN Section (7/8) ­ ................... 30
6-12. Schematic Diagram ­MAIN Section (8/8) ­ ................... 31
7.
EXPLODED VIEWS
7-1.
Case (Lower) Section ...................................................... 42
7-2.
Case (Upper) Section ....................................................... 43
7-3.
Chassis Section ................................................................ 44
7-4.
Mechanism Deck Section (MT-MZNH900-181) ............ 45
8.
ELECTRICAL PARTS LIST ................................ 46
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
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.
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.
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.
Design and specifications are subject to change
without notice.
When playing continuously in MD mode
Battery life 1)
When playing continuously in Hi-MD mode
Disc type
Linear PCM
Hi-SP
Hi-LP
1GB Hi-MD disc
Approx.
11.0 hours2)
Approx.
21.5 hours2)
Approx.
25.5 hours2)
60/74/80-minute
standard disc
Approx.
9.5 hours2)
Approx.
20.0 hours2)
Approx.
24.5 hours2)
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.
Disc type
SP stereo
LP2 stereo
LP4 stereo
60/74/80-minute
standard disc
Approx. 20.5 hours Approx. 24.5 hours Approx. 27.0 hours
Ver 1.1


background image
3
MZ-NH600D
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
OPERATION CHECK WHEN THE LID IS OPEN
In making an operation check with the MAIN Board removed from
the set, short the SL894 (OPEN/CLOSE) of the MAIN Board with
the solder before starting the operation check.
Note: Be sure to remove the solder used for shortcircuit after the repaire
completed.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
SECTION 1
SERVICING NOTES
SL894
(OPEN/CLOSE)
­ MAIN Board (Conductor Side) ­
Providing the required system environment
The following system environment is required in order to use the SonicStage Ver. 2.0/MD
Simple Burner Ver. 2.0 software for the MD Walkman.
This software is not supported by the following environments:
·OSs other than the indicated above
·Personally constructed PCs or operating systems
·An environment that is an upgrade of the original manufacturer-installed operating system
·Multi-boot environment
·Multi-monitor environment
·Macintosh
·We do not ensure trouble-free operation on all computers that satisfy the system requirements.
·The NTFS format of Windows XP/Windows 2000 Professional can be used only with the standard
(factory) settings.
·We do not ensure trouble-free operation of the system suspend, sleep, or hibernation function on all
computers.
·For Windows 2000 Professional users, install Service Pack 3 or later version before using the
software.
System requirements
Computer
IBM PC/AT or Compatible
· CPU: Pentium II 400 MHz or higher (Pentium III 450 MHz or higher
is recommended.)
· Hard disk drive space: 200 MB or more (1.5 GB or more is
recommended) (The amount space will vary according to Windows
version and the number of music files stored on the hard disk.)
· RAM: 64 MB or more (128 MB or more is recommended)
Others
· CD drive (capable of digital playback by WDM)
Sound Board
· USB port (supports USB (previously USB 1.1))
Operating
System
Factory installed:
Windows XP Media Center Edition 2004/Windows XP Media Center
Edition/Windows XP Professional/Windows XP Home Edition/
Windows 2000 Professional/Windows Millennium Edition/Windows
98 Second Edition
Display
High Color (16bit) or higher, 800
× 600 dots or better (1024 × 768 dots
or better is recommended)
Others
· Internet access: for Web registration, EMD services and CDDB
· Windows Media Player (version 7.0 or higher) installed for playing
WMA files
Notes
NOTES ON REPLACING THE MAIN BOARD
If the MAIN board is replaced with new part, the newly supplied
MAIN board includes the functions of the XRST board.
Accordingly, the XRST board comes unnecessary, and thus discard
the XRST board after replacing the MAIN board.
(Refer to the supplement-1 for new type MAIN board)
Ver. 1.2


background image
4
MZ-NH600D
SECTION 2
GENERAL
This section is extracted from
instruction manual.
Looking at controls
The player
A x (stop)
· CANCEL button
B OPEN switch
C Display window
D DOWNLOAD button
This button allows you to record
music tracks from an audio CD in the
CD drive of your computer to an MD
Walkman using the supplied MD
Simple Burner Ver. 2.0 software.
E
·NAVI/ MENU button
Press lightly to go to the NAVI
(navigation) setting mode.
Press for 2 seconds or more to go to
the MENU setting mode.
F GROUP button
G X (pause) button
H Jog dial
I 5-way control key
Operation
Function
Press NENT 1)
1) There are tactile dots beside the NENT
and
VOL + buttons.
play, enter
Press towards
.
find the beginning
of the previous
track, rewind
Press towards
>
find the beginning
of the next track,
fast forward
Press towards
VOL +1) or
VOL
-
volume
J
USB cable connecting jack
K Battery compartment
(at the bottom)
L HOLD switch
Slide the switch in the direction of the
arrow to disable the buttons on the
player.
To prevent the buttons from being
accidentally operated when you carry
the player, use this function.
M i (headphones/earphones) jack
The display window of the player
A Character information display
Displays the disc and track names,
date, error messages, track numbers,
etc.
B Hi-MD/MD indication
"Hi-MD" lights up when the
operation mode of the player is in Hi-
MD mode and "MD" lights up when
the operation mode is in MD mode.
C REC indication
Lights up during file transfers from
the computer. When flashing, the
player is in record standby mode.
D Battery indication
Shows the approximate remaining
battery power. If the battery is weak,
the indication becomes empty and
starts flashing.
E Disc indication
Shows that the disc is rotating for
playing.
F Track mode (PCM, Hi-SP, Hi-LP, SP,
LP2, LP4, MONO) indication
G Sub play mode/Repeat play
indications
Shows the selected Sub play mode
(single-track play, shuffle play, etc.) or
Repeat play.
H Main play mode indications
Shows the selected main play mode
(group play, bookmark play, etc.).
12
3 4
5
67
8


background image
MZ-NH600D
5
· This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-2. CASE (LOWER) SECTION
(Page 6)
3-3. MAIN BOARD
(Page 6)
3-4. CASE (UPPER) SECTION
(Page 7)
3-5. MECHANISM DECK SECTION (MT-MZNH900-181),
MD STANDARD PIN
(Page 7)
3-7. GEAR (BSA), GEAR (SB)
(Page 8)
3-8. OP SERVICE ASSY
(Page 9)
3-9. DC MOTOR SSM18D/C-NP (SPINDLE) (M701),
DC MOTOR (SLED) (M702),
DC MOTOR UNIT (OVER WRITE HEAD UP/DOWN) (M703)
(Page 9)
3-10. HOLDER ASSY
(Page 10)
3-6. SET CHASSIS ASSY
(Page 8)
SET
Note 1: The process described in
can be performed in any order.
Note 2: Without completing the process described in
, the next process can not be performed.