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LG XH-T9546 Service Manual

Dvd/cd receiver
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All manuals and user guides at all-guides.com
DVD/CD RECEIVER
SERVICE MANUAL
CD-R/RW
2004
MODEL:XH-T9546

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Summary of Contents for LG XH-T9546

  • Page 1 All manuals and user guides at all-guides.com DVD/CD RECEIVER SERVICE MANUAL CD-R/RW 2004 MODEL:XH-T9546...
  • Page 2 All manuals and user guides at all-guides.com [CONTENTS] ❍ SECTION 1.GENERAL • SERVICING PRECAUTIONS ..........1-2 •...

  • Page 3: Section 1. General

    All manuals and user guides at all-guides.com SECTION 1. GENERAL ❏ 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.

  • Page 4: Notes Regarding Compact Disc Player Repairs

    All manuals and user guides at all-guides.com 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 5 All manuals and user guides at all-guides.com ❏ 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.
  • Page 6 All manuals and user guides at all-guides.com ❏ SPECIFICATIONS - 1-5 -...
  • Page 7 All manuals and user guides at all-guides.com MEMO - 1-6 -...

  • Page 8: Section 2. Audio Part

    All manuals and user guides at all-guides.com SECTION 2. AUDIO PART ❏ ELECTRICAL TROUBLESHOOTING GUIDE 1. Power check flow INSERT POWER CORD. TURN ON CHECK POWER PLUG THE RED LED? AND POWER SUPPLY CIRCUIT . TURN POWER ON. IS POWER ON? CHECK POWER SUPPLY CIRCUIT .
  • Page 9 All manuals and user guides at all-guides.com 2.AUDIO µ.COM CIRCUIT POWER ON Does AV 1/2, TV, AUDIO, Does CD/DVD OPTICAL IN, COAXIAL IN, FM87.5 appear at FLD? appear at FLD? Does it appear Does LOADING DVD Error at appear at FLD? FLD? Check Does no Disc or...
  • Page 10 All manuals and user guides at all-guides.com 3.FRONT CIRCUIT (1/2) - 2-3 -...
  • Page 11 All manuals and user guides at all-guides.com 4.FRONT CIRCUIT (2/2) - 2-4 -...
  • Page 12 All manuals and user guides at all-guides.com ❏ BLOCK DIAGRAM...

  • Page 13: Front Schematic Diagram

    All manuals and user guides at all-guides.com ❏ SCHEMATIC DIAGRAMS • FRONT SCHEMATIC DIAGRAM...
  • Page 14 All manuals and user guides at all-guides.com • MICOM SCHEMATIC DIAGRAM 2-10...

  • Page 15: I//O Schematic Diagram

    All manuals and user guides at all-guides.com • I//O SCHEMATIC DIAGRAM 2-11 2-12...

  • Page 16: Dsp Schematic Diagram

    All manuals and user guides at all-guides.com • DSP SCHEMATIC DIAGRAM 2-13 2-14...

  • Page 17: Amp Schematic Diagram

    All manuals and user guides at all-guides.com • AMP SCHEMATIC DIAGRAM 2-15 2-16...
  • Page 18 All manuals and user guides at all-guides.com • SMPS-WIDE SCHEMATIC DIAGRAM 2-17 2-18...

  • Page 19: Power Schematic Diagram

    All manuals and user guides at all-guides.com • POWER SCHEMATIC DIAGRAM 2-19 2-20...
  • Page 20 All manuals and user guides at all-guides.com ❏ WIRING DIAGRAMS 2-21 2-22...
  • Page 21 All manuals and user guides at all-guides.com ❏ PRINTED CIRCUIT DIAGRAMS • MAIN P.C. BOARD (COMPONENT SIDE) 2-23 2-24...
  • Page 22 All manuals and user guides at all-guides.com • MAIN P.C. BOARD (SOLDER SIDE) 2-25 2-26...
  • Page 23 All manuals and user guides at all-guides.com • FRONT P.C.BOARD (SOLDER SIDE) • FRONT P.C.BOARD (COMPONENT SIDE) 2-27 2-28...

  • Page 24: Power P.c.board

    All manuals and user guides at all-guides.com • POWER P.C.BOARD 2-29 2-30...
  • Page 25 All manuals and user guides at all-guides.com MEMO MEMO 2-31 2-32...

  • Page 26: Section 3. Dvd Part

    All manuals and user guides at all-guides.com SECTION 3. DVD PART ❏ ELECTRICAL TROUBLESHOOTING GUIDE 1. Power check flow - 3-1 -...
  • Page 27 All manuals and user guides at all-guides.com 2. System operation flow Power On 1. 8032 initializes SERVO, DSP & RISC registers 2. Write RISC code to SDRAM 3. Reset RISC Show LOGO Tray Closed? Tray Close to Closed position SLED at Inner Side ? SLED Moves to Inner Positi on 1.
  • Page 28 All manuals and user guides at all-guides.com 3. Test & debug flow TEST Check the AC Voltage Replace power PCBA or Power PCBA(110V or 220V) AC transformer. Switch on the Power PCBA Is the DC Voltage Repair or Replace Power PCBA outputs OK? (5V,1.8V,3.3V,8V,12V) Make sure the main PCBA don't...
  • Page 29 All manuals and user guides at all-guides.com RESET or Power On. Check connection lines between FLASH Flash Memory operates & MT1389 and the FLASH access time Show LOGO? properly? whether is suitable or not. Check connection lines between SDRAM works properly? SDRAM &...
  • Page 30 All manuals and user guides at all-guides.com Does the SLED move Motor Driver STBY Check the connection line of to inner side when it is at Pin is High? STBY signal. outter position? Is FMSO DC Level higher Check the related circuit of than 1.4V? FMSO.
  • Page 31 All manuals and user guides at all-guides.com Check the laser power circuit Laser turns on when LD01 or LD02 output on MT1336 and connecting to reading disc? properly? power transistor. Collector voltage of Check the related circuit on power transistor is OK? laser power transistor Check cable connection between transistor ouput and pick-up...
  • Page 32 All manuals and user guides at all-guides.com Proper signals on Check connections between Focus ON OK? A,B,C,D of MT1389 MT1389 and pick-up head. Check the FOSO connection on Check FEO signal MT1389 and motor driver. on MT1389 Check FOSO signal on MT1389 Check the related Normal TEO Signal on Track On OK?
  • Page 33 All manuals and user guides at all-guides.com Normal Audio output Audio PWM IC received Check connection between MT1379 when disc playback? correct data stream? & Audio PWM IC. Check the related Normal Audio PWM IC circuit of Audio PWM IC. out? Check Audio filter,amplify,mute circuit.

  • Page 34: System 27Mhz Clock,Reset,Flash R/W Signal

    All manuals and user guides at all-guides.com ❏ 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) FIG 1-1 2) MT1336 reset is high active FIG 1-2 - 3-9 -...
  • Page 35 All manuals and user guides at all-guides.com 3) RS232 waveform during procedure(Downloading) FIG 1-3 4) Flash R/W enable signal during download(Downloading) FIG 1-4 - 3-10 -...

  • Page 36: Sdram Clock

    All manuals and user guides at all-guides.com 2. SDRAM CLOCK 1) MT1379 main clock is at 27MHz(X501) FIG 2-1 3. TRAY OPEN/CLOSE SIGNAL FIG 3-1 - 3-11 -...

  • Page 37: Sled Control Related Signal (No Disc Condition)

    All manuals and user guides at all-guides.com 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) FIG 4-1 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION) FIG 5-1 - 3-12 -...
  • Page 38 All manuals and user guides at all-guides.com 6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) FIG 6-1 7. DISC TYPE JUDGEMENT W VEFORM FIG 7-1 - 3-13 -...
  • Page 39 All manuals and user guides at all-guides.com FIG 7-2 (DVD) FIG 7-3 (CD) - 3-14 -...
  • Page 40 All manuals and user guides at all-guides.com FIG 7-4 (CD) 8. FOCUS ON W VEFORM FIG 8-1 (DVD) - 3-15 -...
  • Page 41 All manuals and user guides at all-guides.com FIG 8-2 (CD) 9. SPINDLE CONTROL W VEFORM (NO DISC CONDITION) FIG 9-1 - 3-16 -...

  • Page 42: Tracking Control Related Signal(System Checking)

    All manuals and user guides at all-guides.com 10. TRACKING CONTROL RELATED SIGNAL(System checking) FIG 10-1 (DVD) FIG 10-2 (CD) - 3-17 -...

  • Page 43: Mt1389 Video Output Waveform

    All manuals and user guides at all-guides.com 11. MT1389 AUDIO OPTICAL AND COAXIAL INPUT (SPDIF) FIG 11-1 (DVD) 12. MT1389 VIDEO OUTPUT WAVEFORM 1)100% FIG 12-1 - 3-18 -...

  • Page 44: Composite Video Signal

    All manuals and user guides at all-guides.com 2) COMPOSITE VIDEO SIGNAL FIG 12-2 13. MT1389 AUDIO OUTPUT TO PWM IC ADAT0~3 FIG 13-1 - 3-19 -...
  • Page 45 All manuals and user guides at all-guides.com 14. AUDIO OUTPUT FROM PWM IC FIG 14-1 - 3-20 -...
  • Page 46 All manuals and user guides at all-guides.com ❏ BLOCK DIAGRAM 1. Overall Block Diagram CVBS - 3-21 -...
  • Page 47 All manuals and user guides at all-guides.com 2. SERVO Block Diagram - 3-22 -...

  • Page 48: Mpeg & Memory Block Diagram

    All manuals and user guides at all-guides.com 3. MPEG & MEMORY Block Diagram - 3-23 -...

  • Page 49: Video & Audio Block Diagram

    All manuals and user guides at all-guides.com 4. VIDEO & AUDIO Block Diagram - 3-24 -...

  • Page 50: Mpeg Schematic Diagram

    All manuals and user guides at all-guides.com ❏ DVD PART SCHEMATIC DIAGRAMS • MPEG SCHEMATIC DIAGRAM 3-25 3-26...

  • Page 51: Servo Schematic Diagram

    All manuals and user guides at all-guides.com • SERVO SCHEMATIC DIAGRAM 3-27 3-28...

  • Page 52: Section 4. Exploded Views

    All manuals and user guides at all-guides.com SECTION 4. EXPLODED VIEWS • CABINET AND MAIN FRAME SECTION...

  • Page 53: Deck Mechanism Exploded View

    All manuals and user guides at all-guides.com • DECK MECHANISM EXPLODED VIEW LOCA. NO. PART NO. DESCRIPTION SPECIFICATION REMARKS 6721RJ0856S DECK ASSEMBLY,AUDIO DECK/MECHA DP-7T-HZ-SAMSUNG DL 4861R-0016D CLAMP ASSEMBLY DECK/MECHA DISC DP-7C(7A) -HZ 3041R-M040A BASE ASSEMBLY MAIN DP-7T-HZ 3041R-M063D BASE ASSEMBLY SLED DP-7T(A)-HZ -SAMSUNG DL3 3300R-0547A PLATE...

  • Page 54: Section 5. Speaker Part

    All manuals and user guides at all-guides.com SECTION 5. SPEAKER PART ❏ MODEL: XHS-T9546W - 5-1 -...
  • Page 55 All manuals and user guides at all-guides.com ❏ MODEL: XHS-T9546C - 5-2 -...
  • Page 56 All manuals and user guides at all-guides.com ❏ MODEL: XHS-T9546T - 5-3 -...
  • Page 57 All manuals and user guides at all-guides.com MEMO - 5-4 -...

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