Sony MDS-JB940 free download

File name sony_MDS-JB940_service_manual.pdf

MDS-JB940 SERVICE MANUAL US Model Canadian Model AEP Model UK Model U.S and foreign patents licensed from Dolby Laboratories Licensing Corporation. Model Name Using Similar Mechanism MD Mechanism Type Optical Pick-up Name NEW MDM-7A KMS-260B/J1N SPECIFICATIONS System Disc Laser Laser output MiniDisc digital audio system MiniDisc Semiconductor laser ( = 780 nm) Emission duration: continuous MAX 44.6 µW1) 1) This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. Material: GaAlAs 400 rpm to 900 rpm ACIRC (Advanced Cross Interleave Reed Solomon Code) 44.1 kHz ATRAC (Adaptive TRansform Acoustic Coding)/ATRAC 3 EFM (Eight-to-Fourteen Modulation) 2 stereo channels 5 to 20,000 Hz ±0.3 dB Over 100 dB during play Below measurable limit Jack type: phono Impedance: 47 kilohms Rated input: 500 mVrms Minimum input: 125 mVrms DIGITAL OPTICAL IN1 Connector type: square optical Impedance: 660 nm (optical wave length) DIGITAL OPTICAL IN2 Connector type: square optical Impedance: 660 nm (optical wave length) DIGITAL COAXIAL IN Jack type: phono Impedance: 75 ohms Rated input: 0.5 Vp-p, ±20 % Outputs PHONES Jack type: stereo phone Rated output: 28 mW Load impedance: 32 ohms Mass (approx.) General Power requirements Where purchased U.S.A. and Canada Europe Power consumption Dimensions (approx.) Power requirements 120 V AC, 60 Hz 230 V AC, 50/60 Hz 18 W 430 Ч 111 Ч 286 mm (17 Ч 4 3/8 Ч 11 3/8 in.) (w/h/d) incl. projecting parts and controls 5.3 kg (11 lbs 11 oz) Laser diode Revolutions (CLV) Error correction Sampling frequency Coding Modulation system Number of channels Frequency response Signal-to-noise ratio Wow and flutter Inputs ANALOG IN Supplied accessories ANALOG OUT Jack type: phono Rated output: 2 Vrms (at 50 kilohms) Load impedance: over 10 kilohms DIGITAL OPTICAL OUT Connector type: square optical Rated output: ­18 dBm Load impedance: 660 nm (optical wave length) DIGITAL COAXIAL OUT Jack type: phono Rated output: 0.5 Vp-p (at 75 ohms) Load impedance: 75 ohms This MD deck comes with the following items: Audio connecting cords (2) Optical cable (1) Remote commander (remote) (1) R6 (size-AA) batteries (2) US and foreign patents licensed from Dolby Laboratories. Design and specifications are subject to change without notice. MINIDISC DECK TABLE OF CONTENTS SELF-DIAGNOSIS FUNCTION ········································ 4 1. SERVICE NOTE ······························································· 6 2. GENERAL ········································································ 11 3. DISASSEMBLY ······························································ 14 4. TEST MODE ··································································· 17 5. ELECTRICAL ADJUSTMENTS ······························ 22 6. DIAGRAMS 6-1. Block Diagram MAIN Section ································ 31 6-2. Block Diagram DISPLAY/POWER Section ··········· 32 6-3. Note for Printed Wirin