Sony MZ-R50 service manual US Model Canadian Model AEP Model UK Model, Portable Minidisc Recorder

MZ-R50

SERVICE MANUAL

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Tourist Model

US and foreign parts licensed Dolby Laboratories Licensing Corporation.

Model Name Using Similar Machanism	NEW
MD Machanism Type	MT-MZR-50-143
Optical Pick-up Type	KMS-280A

SPECIFICATIONS

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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PORTABLE MINIDISC RECORDER

MICROFILM