Sony MZ-R50 Service Manual - Page 1

SERVICE MANUAL MZ-R50 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 MD Machanism Type Optical Pick-up Type NEW MT-MZR-50-143 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) - Continued on page 2 - PORTABLE MINIDISC RECORDER MICROFILM