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S®
Training Manual
Digital Video
Player
Circuit Description and Troubleshooting
Course: DVD-02
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Course Description and Troubleshooting: Model: DVP-S530D Prepared by: National Training Department Sony Service Company A Division of Sony Electronics Inc. Course presented by______________________________________ Date___________________________________________________ Student Name ___________________________________________
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Sony Service Company A Division of Sony Electronics Inc ©1999 All Rights Reserved Printed in U.S.A. “DTS” is a trademark of Digital Theater Systems, Inc. “AC-3” is a trademark of Dolby Laboratories Licensing Corporation. “Dolby” and “Dolby Surround” are trademarks of Dolby Laboratories Licensing Corporation. “Sony” and “Digital Cinema Sound” are trademarks of Sony. “THX” is a trademark of Lucasfilm, Ltd.
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Table of Contents Regulation Concept 13 Introduction to the DTS Audio Format 1 Regulation Circuitry 13 What is DTS? 2 Main Oscillator 15 What do I need to play the DTS surround format? 2 What do I need to play both the AC-3 and Enable 15 DTS surround formats? 2 Start 15 Will a 5.1 channel DTS CD play in my CD player? 2 Run 15 Why won’t my older DVD player play DTS DVDs? 3 Regulation 15 Can DVD movies contain both DTS and AC-3 Power Control 17 audio tracks? 3 Plug In 17 How does DTS work? 3 Comm
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Manually Driving the Tilt Motor 71 Initial Sled Motor Drive 41 Initial Sled Movement 41 A/V Processing Block 73 Home Position Detection 45 A/V Processing 75 Laser Servo 47 Test Mode 81 KHM-220A DVD Optical Block 49 Test Mode Access 81 DVD Focus 49 Tests 81 CD Focus 49 Additional Test Mode 83 Three Laser Beams from One Laser 50 Self-Diagnostic Function (Customer Error Codes) 83 Photo Detectors 51 Troubleshooting 85 Disc Identification 53 General Problems and Troubleshooting Guide 85 Operation 53
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1 Introduction to the DTS Audio Format Several major consumer audio formats that exist today are listed in this table: Audio Formats Year Chan Typical Typical Data Rate Format (note 1) Class Compression Test Disc Signal Source (note 3) Used -nels sample (note 2) (Approx.) 1. Stereo 1933 2 Analog linear FM, VHS, CD, LD, etc. 2. PCM (digital 2 Digital 16 bits / 705kbit/sec None DVD, LD version of stereo) sample. (44.1kHz sample) 3. Dolby Surround 1982 3 Analog None VHS ® Prologic test CD 4. Dolby
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AC-3 decoder in the Receiver: What is DTS? 5 Speakers Digital Theater Systems has developed a digital audio compression method similar to Dolby Digital AC-3. DTS processed audio is not as compressed CD/DVD Player 6 Channel Receiver as Dolby AC-3. Therefore it is said to have more surround detail (separa- tion), envelopment and better bass because of less compression (losses). With DTS Decoder What do I need to play the DTS surround format? And AC-3 Decoder The DTS source can be a DVD movie or
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3 Why won’t my older DVD player play DTS DVDs? MDCT Time to Frequency Conversion The DVD DTS flag was not established until Nov 1998. This flag must be Each single channel PCM source signal is grouped and allocated to one inserted into the DVD’s digital coax or optical output for the receiver to of 32 frequency bands for analysis. The process is commonly known as recognize and decode DTS. Therefore DVD units that are not marked Modified Discrete Cosine Transformation (MDTC). This frequency b
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Multiplexer Compression Block: The six compressed channels are combined into a single line for ease of delivery. To do this each channel is stored into a register made up of flip- ADPCM: flops. A high speed Multiplexer removes the information at six times the From • Transient analysis storage (sample) speed. Multiplexer time to • Vector analysis Multiplexer freq • Prediction analysis Six Channels F/F type Converter Registers Global Bit Management 6 lines N sample Variable Length Co
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5 BOARD LAYOUT
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DVP-S7700 DVP-C600 DVP-S550D DVP-S530D DVP-S330 DVD Features DVD Models DVD Models MSRP * $ 449.00 $ 499.00 $ 599.00 $ 899.00 $ 1,399.00 General Single Optical Assembly x x x Dual Optical Assembly x x Active laser platform tilt servo x x x x TV / receiver / DVD Remote x x x x Advanced Test Mode x x x x Glow in the dark Remote keys x x Glass Epoxy Circuit Boards x Anti-Resonate Chassis & tray x Copper Plated Shielded Chassis x Video 10 bit Video D/A Converter x x x x Digital RF Process
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7 ICs Checked During Start Up Block Diagram Name Number Purpose 1. Flash ROM IC205 Start up program instructions There are four major stages within this DVD player. They operate in this sequence to produce the discs’ video and audio: 2. Hybrid Gate IC601 Expansion port for System Control Array IC202 to indirectly communicate with · Power Supply others on the parallel bus. · Communications 3. SRAM IC204 IC202’s local memory · Servo Control · Video and Audio Processing 4. AV Decoder IC401 Audio (
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AU212 BD. IC402 IC304 IC403 SPINDLE DRAM SDRAM CONTROL S VIDEO OUT Y,C IC802 IC401 VIDEO AV COMPONENT V OUT Y,P , P MECHANISM DVD b r BUFFERS TK-51 BD. DECODER DATA COMPOSITE V OUT Y RF IC001 RF OPTICAL IC303 DIGITAL AUDIO OUT RF LD SPDIF, DEVICE ARP2 AMP ANALOG ACHI-6, AUDIO IC902 CLK IC501 CD OUT DAC AUDIO DATA, DSP CLK FE S. 5.1 CH IC905-7 TE DATA AC-3 DAC PI CLK OUT FOCUS IC801 COIL PARALLEL BUS IC204 FOCUS TRACK SRAM & COIL TRACKING COIL TILT MOTOR IC205 IC202 IC701 M IC601 DRIVER FLASH S
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9 Audio / Video Processing ICs Video and Audio Processing Name IC Audio Purpose After the servos have begun, RF data will come from the optical assembly or within the base unit. The “eye pattern” RF data is split into two paths to Video RF Amp IC001 A/V Matrix the optical outputs to produce provide: (both) signals for servo and A/V circuits 1. Feedback signal to lock the servos; and ARP2 IC303 A/V 16 to 8 bit Demodulation • 2. Video and audio information. (both) Descrambles the main data usin
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AU212 BD. IC402 IC304 IC403 SPINDLE DRAM SDRAM CONTROL S VIDEO OUT Y,C IC802 IC401 VIDEO AV COMPONENT V OUT Y,P , P MECHANISM DVD b r BUFFERS TK-51 BD. DECODER DATA COMPOSITE V OUT Y RF IC001 RF OPTICAL IC303 DIGITAL AUDIO OUT RF LD SPDIF, DEVICE ARP2 AMP ANALOG ACHI-6, AUDIO IC902 CLK IC501 CD OUT DAC AUDIO DATA, DSP CLK FE S. 5.1 CH IC905-7 TE DATA AC-3 DAC PI CLK OUT FOCUS IC801 COIL PARALLEL BUS IC204 FOCUS TRACK SRAM & COIL TRACKING COIL TILT MOTOR IC205 IC202 IC701 M IC601 DRIVER FLASH S
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11 When a shorted spindle motor driver IC802 loaded the unfused +12V Power Supply Block supply line, the main oscillator quit. The oscillator worked again when the short was removed. The power supply is on a single board located to the left of the DVD Regulation mechanism. This board contains both the standby and the main power The 3.3Vdc output is used to regulate the main power supply. Error supply. The input line filter L101 and the board connectors are the only detector IC201 receives t
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SRV902UC BOARD CN201 L201 +12V +12V PS201 4 +5V PS202 +5V 2 Q101,102,T101 TO +3.3V PS203 +3.3V MAIN OSC. 1 AU212 BD. PS204 -12V ANALOG AUDIO/ 6 -12V VIDEO D101-104 EVER 5V 7 RV201 CN202 M+12V 2 A+12V TO PC101 IC201 1 MB 85 BD. PHOTO ERROR +5V 5 SERVO CONTROL COUPLER DET. +3.3V 6 L101 7 LINE PC102,Q201 CN203 PCONT FILTER POWER 1 CONTROL TO +5V 3 FR148,FL101 BDS. -12V INTERFACE/ 5 DISPLAY EVER 5V EVER 5V Q121,122,T102 2 STBY OSC. L205 F101 PC121 IC202 PHOTO ERROR COUPLER DET. CN101 1 2 2DVD02 1137
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13 The collapsing magnetic field induces a negative voltage into the lower Standby Oscillator secondary winding. The negative voltage takes two paths to reset the oscillator. The first path is through R126, R125 and C121 to keep oscilla- The standby oscillator produces Ever +5 volts when the DVD player is tor transistor Q121 OFF. The second path is through D121 and R128 into plugged into 120VAC. This Ever 5V is applied to the Interface IC201 (on the base of Q122. This turns off transistor Q
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MAIN OSC D101-D104 R121 T102 C123 R122 C108 R130 L205 CN203 Q121 D206 5V 220 D EVER 5V R123 2 TO FR150 BD. C102 + + (DISPLAY) S C121 C210 R124 D208 100 L101 CN201 R125 EVER 5V LINE 7 TO AV212 BD. FILTER R128 R126 + (MUTE) 22k C211 Q122 100 R127 D121 R129 100 OHM R206 470 OHMS D122 R212 R207 1k R209 C212 4.1V PC121 R208 ON3131 2.5V IC202 AN1431 R210 STANDBY OSCILLATOR 29DVD02 1175 6 28 99 14
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15 Run Main Oscillator Q101 Turns ON The main oscillator stage operates like the standby oscillator stage ex- When Q101 turns ON, current flows through the main transformer’s pri- cept that the main oscillator is switched ON/OFF and there are multiple mary winding at the upper left of T101. This induces a positive voltage to secondaries to supply the needs of the DVD player. the lower T101 winding that follows two paths. The first path is through R106, R107, D109 and C113 to Q101’s base to kee
