Sony MZ-R900 Service Manual - Page 1

SERVICE MANUAL Ver 1.2 2001. 03 Photo: Red type MZ-R900 US Model Canadian Model AEP Model UK Model E Model Australian Model Chinese Model Tourist Model 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 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 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 When using MDW-80: Maximum 160 min. in monaural Maximum 320 min. in stereo Revolutions 350 rpm to 2,800 rpm (CLV) Error correction ACIRC (Advanced Cross Interleave Reed Solomon Code) Sampling frequency 44.1 kHz 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 Frequency response 20 to 20,000 Hz ± 3 dB SPECIFICATIONS Wow and Flutter Below measurable limit 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 Outputs i/LINE OUT2): 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. Power requirements Sony AC Power Adaptor connected at the DC IN 3V jack: 120 V AC, 60 Hz (US model) 230-240 V AC, 50/60 Hz (UK and Hong Kong model) 220-230 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) 100-240 V AC, 50/60 Hz (Other models) Nickel metal hydride rechargeable battery NH14WM LR6 (size AA) alkaline battery Battery operation time Battery life1) When recording2) (Unit: approx.hours)(EIAJ3)) Batteries Stereo LP2 LP4 NH-14WM 8 nickel metal hydride rechargeable battery4) 10.5 13 LR6 (SG) 7 Sony alkaline dry battery5) 10 14 NH-14WM 19 nickel metal hydride rechargeable battery4) + One LR6 (SG)5) 26 30 1) The 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. - Continued on next page - PORTABLE MINIDISC RECORDER 9-927-991-13 2001C0500-1 C 2001.3 Sony Corporation Audio Entertainment Group General Engineering Dept.