SERVICE MANUAL
PORTABLE MINIDISC RECORDER
MZ-NH900
SPECIFICATIONS
9-879-121-02
2004I05-1
© 2004.09
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
US and foreign patents licensed from Dolby
Laboratories.
Model Name Using Similar Mechanism
NEW
MD Mechanism Type
MT-MZNH900-181
Optical Pick-up Name
ABX-U
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
Tourist Model
•
SonicStage and SonicStage logo are trademarks or registered trademarks of Sony Corporation.
•
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.
Inputs
1)
MIC: stereo mini-jack
(minimum input level 0.13 mV)
Line in:
stereo mini-jack for analog input
(minimum input level 49 mV)
optical (digital) mini-jack for optical
(digital) input
Outputs
i
/LINE OUT
2)
: stereo mini-jack (dedicated
remote control jack)/194 mV (10 k
Ω
)
Maximum output (DC)
2)
Headphones:
3 mW + 3 mW (16
Ω
) (European models)
5 mW + 5 mW (16
Ω
) (Other models)
Power requirements
Sony AC Power Adaptor connected at the DC
IN 3V jack:
120 V AC, 60 Hz (Models for USA, Canada,
Mexico and Taiwan)
240 V AC, 50 Hz (Model for Australia)
220 V AC, 50 Hz (Models for China and
Argentine)
100 - 240 V AC, 50/60 Hz (Other models)
The recorder:
Nickel metal hydride rechargeable battery
NH-10WM 1.2V 900 mAh (MIN) Ni-MH
LR6 (size AA) alkaline battery
Battery charging stand:
AC power adaptor DC 3V
Operating temperature
+5
°
C (+41
°
F) to +35
°
C (+95
°
F)
Dimensions
Approx. 81.3
×
77.8
×
21.2 mm (w/h/d)
(3
1
/
4
×
3
1
/
8
×
27
/
32
in.) (excluding projecting
parts and controls)
Mass
Approx. 110 g (3.9 oz) (the recorder only)
Approx. 133 g (4.7 oz) (including the
Supplied accessories
AC power adaptor (1)
Battery charging stand (1)
Remote control (1)
Headphones (for USA model) (1)
Earphones (except USA model) (1)
Dedicated USB cable (1)
NH-10WM Nickel metal hydride rechargeable
battery (1)
Dry battery case (1)
Battery carrying case (1)
Clamp filter (2)
CD-ROM (SonicStage/MD Simple Burner) (1)*
Optical cable (1)
Carrying pouch (except USA model) (1)
*Do not play a CD-ROM on an audio CD
player.
rechargeable battery)
1)
The LINE IN (OPT) jack is used to connect
either a digital (optical) cable or a line
(analog) cable.
2)
The
i
/LINE OUT jack connects either
headphones/earphones or a line cable.
3)
Measured in accordance with JEITA.
Design and specifications are subject to change
without notice.
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength:
λ
= 790 nm
Emission duration: continuous
Laser output: less than 44.6
µ
W
(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
350 rpm to 3,000 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
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Summary of Contents for Walkman MZ-MH900
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