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MICROFILM
MZ-R50
SERVICE MANUAL
PORTABLE MINIDISC RECORDER
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
Model Name Using Similar Machanism NEW
MD Machanism Type MT-MZR-50-143
Optical Pick-up Type KMS-280A
US and foreign parts licensed Dolby Laboratories Licensing
Corporation.
System
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAIAs
Wavelength: λ = 780 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
Maximum 74 minutes (MDW-74, stereo
recording)
Maximum 148 minutes (MDW-74, monaural
recording)
Revolutions
400 rpm to 900 rpm (CLV)
Error correction
Advanced Cross Interleave Reed Solomon
Code (ACIRC)
Sampling frequency
44.1 kHz
Sampling rate converter
Input: 32 kHz / 44.1 kHz / 48 kHz
Coding
Adaptive Transform Acoustic Coding (ATRAC)
Modulation system
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels
1 monaural channel
Frequency response
20 to 20,000 Hz ± 3 dB
Wow and Flutter
Below measurable limit
Inputs
Microphone: stereo mini-jack, 0.22-0.78 mV
Line in: stereo mini-jack, 69-194 mV
Optical (Digital) in: optical (digital) mini-jack
Outputs
Headphones: stereo mini-jack, maximum
output level 5 mW+ 5 mW, load impedance
16 ohm
Line out: stereo mini-jack, 194 mV, load
impedance 10 kilohm
General
Power requirements
Sony AC Power Adaptor (supplied)
connected at the DC IN 6 V jack:
120 V AC, 60 Hz (US, Canadian model)
220-230 V AC, 50/60 Hz (AEP model)
230-240 V AC, 50/60 Hz (UK, Hong Kong model)
240 V AC, 50/60 Hz (Australian model)
100-240 V AC, 50/60 Hz (E, Tourist model)
Lithium ion rechargeable battery LIP-8 (supplied)
Two LR6 (size AA) alkaline batteries (not supplied)
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