File name sony_MZ-R900_service_manual.pdfMZ-R900
SERVICE MANUAL
Ver 1.2 2001. 03
US Model Canadian Model AEP Model UK Model E Model Australian Model Chinese Model Tourist Model
Photo: Red type
US and foreign patents licensed from Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism Mechanism Type Optical Pick-up Name
NEW MT-MZR900-171 LCX-4R
SPECIFICATIONS
Audio playing system
MiniDisc digital audio system
Wow and Flutter
Below measurable limit
Battery operation time
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.)
Inputs
Microphone: stereo mini-jack, minimum input level 0.25 mV Line in1): stereo mini-jack, minimum input level 49 mV Optical (Digital) in1): optical (digital) mini-jack
Battery life1)
When recording2)
Batteries
(Unit: approx.hours)(EIAJ3)) Stereo LP2 LP4 8 10.5 13
Outputs
i/LINE stereo mini-jack headphones/earphones: maximum output level 5 mW + 5 mW, load impedance 16 ohm LINE OUT: 194 mV, load impedance 10 kilohm 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. OUT2):
Recording and playback time
When using MDW-80: Maximum 160 min. in monaural Maximum 320 min. in stereo
NH-14WM nickel metal hydride rechargeable battery4) LR6 (SG) Sony alkaline dry battery5) NH-14WM nickel metal hydride rechargeable battery4) + One LR6 (SG)5)
1) The
Revolutions
350 rpm to 2,800 rpm (CLV)
7
10
14
Error correction
ACIRC (Advanced Cross Interleave Reed Solomon Code)
19
26
30
Sampling frequency
44.1 kHz
Power requirements
Sony AC Power Adaptor connected at the DC IN 3V jack: 120 V AC, 60 Hz (US model) 230240 V AC, 50/60 Hz (UK and Hong Kong model) 220230 V AC, 50/60 Hz (European model) 120 V AC, 50 Hz (Canadian model) 240 V AC, 50 Hz (Australian model) 220 V AC, 50 Hz (Chinese model) 110/220 V AC, 60 Hz (Korean model) 100240 V AC, 50/60 Hz (Other models) Nickel metal hydride rechargeable battery NH14WM LR6 (size AA) alkaline battery
Sampling rate converter
Input: 32 kHz/44.1 kHz/48 kHz
Coding
ATRAC (Adaptive TRansform Acoustic Coding) ATRAC3 -- LP2 ATRAC3 -- LP4
Modulation system
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels 1 monaural channel
battery life may be shorter due to operating conditions and the temperature of the location. 2) When you record, use a fully charged rechargeable battery. Recording time may differ according to the alkaline batteries.
Frequency response
20 to 20,000 Hz ± 3 dB
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PORTABLE MINIDISC RECORDER
9-927-991-13
2001C0500-1 C 2001.3
Sony Corporation
Audio Entertainment Group General Engineering Dept.
MZ-R900
in accordance with the EIAJ(Electronic Industries Association of Japan) standard. 4) When using a 100% fully charged re |