Sony MZ-B50 free download

File name sony_MZ-B50_service_manual.pdf

MZ-B50 SERVICE MANUAL Ver 1.1 2001.03 With SUPPLEMENT-1 (9-927-952-83) US Model Canadian Model AEP 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-MZB50-165 LCX-2R SPECIFICATIONS System Audio playing system MiniDisc digital audio system 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.) Recording and playback time Maximum 80 minutes (MDW-80, stereo recording) Maximum 160 minutes (MDW-80, monaural recording) Maximum 74 minutes (MDW-74, stereo recording) Maximum 148 minutes (MDW-74, monaural recording) Revolutions 400 rpm to 1,800 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 Speaker 28 mm (1 1/8 in.) dia. Frequency response 20 to 20,000 Hz ± 3 dB Wow and Flutter Below measurable limit Inputs Microphone: stereo mini-jack, 0.35­ 1.38 mV Line in: stereo mini-jack, 69­ 194 mV Optical (Digital) in: optical (digital) mini-jack Outputs i : stereo mini-jack Headphones/earphones: 5 mW + 5 mW Speaker: 300 mW ­ Continued on next page ­ PORTABLE MINIDISC RECORDER 9-927-952-12 2001C0200-1 © 2001.3 Sony Corporation Audio Entertainment Group General Engineering Dept. General Power requirements DC 3V Two LR6 (size AA) alkaline batteries Battery operation time Battery life1) (EIAJ2)) Batteries Recording Two LR6 (size AA) Approx. Sony alkaline dry batteries 6 hours 1) The battery life may be shorter due to operating TABLE OF CONTENTS 1. 2. Playback Approx. 18 hours 3. SERVICING NOTES 3 GENERAL 4 conditions, the temperature of the location, and varieties of batteries. 2) Measured in accordance with the EIAJ (Electronic Industries Association of Japan) standard. 3) When using LR6 (SG) Sony "STAMINA" alkaline dry batteries (produced in Japan). 4) To prevent interrupted recording due to drained batteries, use new batteries for recording operations. 5) When played using the built-in speaker. DISASSEMBLY 3-1. Panel (Lower) ASSY 6 3-2. Main Board, Sled Control Board 3-3. Panel (Upper Lid) ASSY 7 3-4. Key Board Unit 7 3-5. BATT Board, DC Jack Board 3-6. Mechanism Deck 8 3-7. Optical Pick-up 9 TEST MODE 10 6 8 4. 5. 6. ELECTRICAL ADJUSTMENTS 17 DIAGRAMS 6-1. Explanation of IC Terminals 22 6-2. Block Diagram ­ Main Section (1/3) ­ 29 6-3. Block Diagram ­ Main Section (2/3) ­ 31 6-4. Block Diagram ­ Main Section (3/3) ­ 33 6-5. Printed Wiring Boards ­ Main Section (1/2) ­ 6-6. Printed Wiring Boards ­ Main Section (2/2) ­ 6-7. Printed Wiring Boards ­ Battery Section ­