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Zenith DVT310 Manual

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• SERVICING PRECAUTIONS ....................................................................................................... 1-2
• ESD PRECAUTIONS ................................................................................................................... 1-4
• SPECIFICATIONS ........................................................................................................................ 1-5
• LOCATION OF CUSTOMER CONTROLS ................................................................................... 1-6
• BLOCK DIAGRAM ........................................................................................................................ 2-1
• SCHEMATIC DIAGRAMS ............................................................................................................ 2-3
• WIRING DIAGRAM ...................................................................................................................... 2-9
• VOLTAGE SHEET (IC&TR) ........................................................................................................ 2-11
• PRINTED CIRCUIT DIARGAMS ................................................................................................ 2-15
SECTION 3. DVD PART
• ELECTRICAL TROUBLESHOOTING GUIDE ............................................................................. 3-1
• DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING ...................................... 3-9
• BLOCK DIAGRAMS .................................................................................................................... 3-22
• DVD PART SCHEMATIC DIAGRAMS ........................................................................................ 3-23
• VOLTAGE SHEET (IC & TR) ...................................................................................................... 3-31
• PRINTED CIRCUIT DIAGRAM ................................................................................................... 3-33
SECTION 4. EXPLODED VIEWS ...................................................................................... 4-1
SECTION 5. SPEAKER PART .......................................................................................... 5-1
SECTION 6. REPLACEMENT PARTS LIST ..................................................................... 6-1
CONTENTS
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Summary of Contents for Zenith DVT310

  • Page 1: Table Of Contents

    CONTENTS SECTION 1. GENERAL • SERVICING PRECAUTIONS ....................... 1-2 • ESD PRECAUTIONS ........................1-4 • SPECIFICATIONS ........................1-5 • LOCATION OF CUSTOMER CONTROLS ................... 1-6 SECTION 2. AUDIO PART • BLOCK DIAGRAM ........................2-1 • SCHEMATIC DIAGRAMS ......................2-3 • WIRING DIAGRAM ........................2-9 •...

  • Page 2: Section 1. General

    SECTION 1. GENERAL PART ❏ SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2.
  • Page 3 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

  • Page 4: Esd Precautions

    ❏ ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

  • Page 5: Location Of Customer Controls

    ❏ LOCATION OF CUSTOMER CONTROLS FRONT PANEL STANDBY/ON OPEN/CLOSE button STANDBY indicator Lights red when the receiver is in Standby mode (off). DISPLAY PLAY/STEP button Window VOLUME DISC Tray controller VOLUME OPEN/CLOSE PAUSE/CLEAR STOP STANDBY/ON PLAY/STEP PHONES MONO/STEREO MEMORY DOWN - TUNING - UP PAUSE/CLEAR/MONO/STEREO Remote sensor button...
  • Page 6 REAR PANEL - 1-7 -...

  • Page 7: Troubleshooting Guide

    SECTION 3. ELECTRICAL TROUBLESHOOTING GUIDE 1. System check flow - 3-1 -...
  • Page 8 2. Power check flow - 3-2 -...
  • Page 9 3. Test & debug flow - 3-3 -...
  • Page 10 - 3-4 -...
  • Page 11 - 3-5 -...
  • Page 12 - 3-6 -...
  • Page 13 - 3-7 -...
  • Page 14 - 3-8 -...

  • Page 15: Details And Waveforms On System Test And Debugging

    ❏ DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) MT1379 main clock is at 27MHz(X501) 2) MT1336 reset is high active - 3-9 -...
  • Page 16 3) RS232 waveform during procedure(Downloading) 4) Flash R/W enable signal during download(Downloading) - 3-10 -...

  • Page 17: Sdram Clock

    2. SDRAM CLOCK 1) MT1379 main clock is at 27MHz(X501) 3. TRAY OPEN/CLOSE SIGNAL 1) Tray open/close waveform - 3-11 -...
  • Page 18 2) Tray close waveform 3) Tray open waveform - 3-12 -...
  • Page 19 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION) - 3-13 -...
  • Page 20 6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) 7. DISC TYPE JUDGEMENT WAVEFORM - 3-14 -...
  • Page 21 - 3-15 -...
  • Page 22 8. FOCUS ON WAVEFORM - 3-16 -...
  • Page 23 9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) - 3-17 -...
  • Page 24 10. TRACKING CONTROL RELATED SIGNAL(System checking) - 3-18 -...
  • Page 25 11. RF WAVEFORM 12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF) - 3-19 -...
  • Page 26 13. MT1379 VIDEO OUTPUT WAVEFORM 1) Full colorbar signal(CVBS) 2) Y - 3-20 -...
  • Page 27 3) C 14. AUDIO OUTPUT FORM AUDIO DAC 1) Audio related Signal - 3-21 -...
  • Page 28 SECTION 5. SPEAKER PART ❏ MODEL: LHS-D6235T A800 - 5-1 -...
  • Page 29 SECTION 5. SPEAKER PART ❏ MODEL: LHS-D6235W - 5-2 -...

  • Page 30: Section 2. Audio Part

    SECTION 2. AUDIO PART ❏ BLOCK DIAGRAM...

  • Page 31: Schematic Diagrams

    ❏ SHEMATIC DIAGRAMS • MAIN SCHEMATIC DIAGRAM...
  • Page 32 • FRONT SCHEMATIC DIAGRAM...
  • Page 33 • POWER SCHEMATIC DIAGRAM NOTE: Warning NOTE: Parts that are shaded are critical With respect 1. Shaded(I) parts are critical for safety.Replace only to risk of fire or electrical shock. with specified part number. 2. Voltages are DC-measured with a digital voltmefer during Play mode.

  • Page 34: Wiring Diagram

    ❏ WIRING DIAGRAM NOTE: Warning Parts that are shaded are critical With respect to risk of fire or electrical shock. 2-10...

  • Page 35: Voltage Sheet (Ic&Tr)

    ❏ VOLTAGE SHEET (IC&TR) LOC. PART PIN NUM. STOP DVD PLAY LOC. PART PIN NUM. STOP DVD PLAY LOC. PART PIN NUM. STOP DVD PLAY -15.1 -15.2 IC500 KIA7808 11.9 11.9 IC650 LC8767XX -26.7 -26.7 -26.7 IC501 KIA7812 18.4 18.4 4.54 4.54 -17.7...
  • Page 36 LOC. PART PIN NUM. STOP DVD PLAY LOC. PART PIN NUM. STOP DVD PLAY -4.5 -4.5 IC400 TDA7265 -18.7 -18.7 18.6 18.6 -18.6 -18.6 IC450 KIA4558 IC601 M60446AFP -5.3 -5.3 IC200 TDA7265 -18.7 -18.7 18.6 18.6 -18.6 -18.6 IC250 TDA7265 -18.7 -18.7 18.6...
  • Page 37 ❏ PRINTED CIRCUIT DIAGRAMS • MAIN/POWER/JACK P.C BOARD (SOLDER SIDE) 2-15 2-16...
  • Page 38 • MAIN/POWER/JACK P.C BOARD (COMPONENT SIDE) 2-17 2-18...
  • Page 39 • FRONT P.C. BOARD (SOLDER SIDE) • FRONT P.C. BOARD (COMPONENT SIDE) 2-19 2-20...

  • Page 40: Dvd Part Schematic Diagrams

    ❏ DVD PART SCHEMATIC DIAGRAMS • MPEG SCHEMATIC DIAGRAM 3-23 3-24...
  • Page 41 • SERVO SCHEMATIC DIAGRAM 3-25 3-26...
  • Page 42 • AUDIO SCHEMATIC DIAGRAM 3-27 3-28...
  • Page 43 • INTERFACE SCHEMATIC DIAGRAM 3-29 3-30...

  • Page 44: Voltage Sheet (Ic&Tr)

    ❏ VOLTAGE SHEET (IC&TR) 3-31 3-32...

  • Page 45: Printed Circuit Diagram

    ❏ PRINTED CIRCUIT DIAGRAM • DVD P.C. BOARD(SOLDER SIDE) 3-33 3-34...
  • Page 46 • DVD P.C. BOARD (COMPONENT SIDE) 3-35 3-36...

  • Page 47: Section 4. Exploded Views

    SECTION 4. EXPLODED VIEWS • CABINET AND MAIN FRAME SECTION NOTE) Refer to “SECTION 6 REPLACEMENT PARTS LIST” in order to look for the part number of each part.
  • Page 48 • Deck Mechanism Exploded View...

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