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LG HT306SF Service Manual

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Internal Use Only
Website http://biz.lgservice.com
DVD HOME CINEMA SYSTEM
SERVICE MANUAL
MODEL: HT306SF
(HT306SF, SH36SF-S, SH36SU-W)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN75272761
FEBRUARY, 2011

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  • Page 1 Internal Use Only Website http://biz.lgservice.com DVD HOME CINEMA SYSTEM SERVICE MANUAL MODEL: HT306SF (HT306SF, SH36SF-S, SH36SU-W) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN75272761 FEBRUARY, 2011...
  • Page 2 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..ELECTRICAL SECTION 3 ..CABINET & MAIN CHASSIS SECTION 4 ..MECHANISM (DP-15T) SECTION 5 ..REPLACEMENT PARTS LIST...

  • Page 3: Table Of Contents

    SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS .......................... 1-3 ESD PRECAUTIONS ............................1-5 SERVICE INFORMATION FOR EEPROM ....................1-6 HOW TO UPDATE DVD & AUDIO MICOM PROGRAMS ................1-7 SPECIFICATIONS ............................1-8...

  • Page 4: Servicing Precautions

    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 5 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 6: 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 7: Service Information For Eeprom

    SERVICE INFORMATION FOR EEPROM POWER ON DETECT NEW EEPROM DVD LOGO Status (NO Disk status) (OPTION EDIT SCREEN) NAME Remote control OPT 1 Pause key-->1-->4-->7-->2 in order. OPT 2 OPT 3 OPT 4 OPT 5 Press number 0~9, Press character OPT 6 OPT 7 A~F (1~6 for a while)

  • Page 8: How To Update Dvd & Audio Micom Programs

    HOW TO UPDATE DVD & AUDIO MICOM PROGRAMS 1. The Whole Sequence 1) DVD program download. 2) Power cord out −> in. 3) Audio micom program download. 4) Remote control Pause key ‘||’ + ‘1472’ for input options. 5) Enter into the system information for check the version, options and check sum. 6) Power off −>...

  • Page 9: Specifications

    SPECIFICATIONS • GENERAL Power requirements Refer to main label Power consumption Refer to main label Dimensions (W x H x D) Approx. 365 x 58.5 x 307 mm without foot Net Weight (Approx.) 2.44 kg Operating temperature 5 °C to 35 °C (41 °F to 95 °F) Operating humidity 5 % to 90 % •...
  • Page 10 SECTION 2 ELECTRICAL CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE ....................2-2 1. POWER SUPPLY CIRCUIT ........................2-2 2. FRONT CIRCUIT (1/2) ..........................2-3 3. FRONT CIRCUIT (2/2) ..........................2-4 4. SYSTEM OPERATION FLOW ........................ 2-5 5. TEST & DEBUG FLOW .......................... 2-6 6.

  • Page 11: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER SUPPLY CIRCUIT INSERT POWER CORD. Turn power on. Check power supply circuit. Is power on? Does it play? Check tracking servo circuit. Does it output Check audio circuit. audio?

  • Page 12: Front Circuit (1/2)

    ELECTRICAL TROUBLESHOOTING GUIDE 2. FRONT CIRCUIT (1/2) POWER ON. Is the Digitron on Check if Reconnect it. correctly? PN301 is ok? Check if all Check if the front Refer to SMPS part. buttons are ok? power is ok? Check if the remote control is ok? Check if Check pattern and resoldering...

  • Page 13: Front Circuit (2/2)

    ELECTRICAL TROUBLESHOOTING GUIDE 3. FRONT CIRCUIT (2/2) Check if the power part of the Refer to power(SMPS). front is ok? Check if R346~R349, R352, R370 Replace R346~R349, R352, R370. Refer to MICOM circuit. Check if the power part of the front Refer to power(SMPS).

  • Page 14: System Operation Flow

    ELECTRICAL TROUBLESHOOTING GUIDE 4. SYSTEM OPERATION FLOW POWER ON. 1. 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 position. 1.

  • Page 15: Test & Debug Flow

    ELECTRICAL TROUBLESHOOTING GUIDE 5. TEST & DEBUG FLOW TEST. Check the Check the POWER PART. AC voltage Power PCBA (110 V or 220 V). Switch on the Power PCBA. Are the DC Voltage outputs OK? (12 V, 3.3 V, Check the POWER PART. 5 V, 7 V, 34 V).
  • Page 16 ELECTRICAL TROUBLESHOOTING GUIDE Power On. Check connection lines Flash between FLASH & MT1389MH Memory operates Show LOGO? and the FLASH access time properly? whether is suitable or not. Check connection lines SDRAM between SDRAM(IC503) & works properly? MT1389MH and the SDRAM is damaged.
  • Page 17 ELECTRICAL TROUBLESHOOTING GUIDE Does Motor the SLED move to inner Check the connection line of Driver M_STBY side when it is at outer M_STBY. pin is high? position? Motor Check the related circuit of Driver M_STBY SLD. pin is High? SLED+ and Check the amp circuit on SLED- output...
  • Page 18 ELECTRICAL TROUBLESHOOTING GUIDE Check the laser power circuit Laser DVDLD or on MT1389MH and turns on when CDLD output connecting to power transis- reading disc? property? tor.(Q403, Q405). Collector Check the related circuit on voltage of power transistor laser power transistor. is OK?(Q403, Q405) Check cable connection between transistor output and...
  • Page 19 ELECTRICAL TROUBLESHOOTING GUIDE Proper Check connections between signals on A, B, C, Focus on ok? MT1389MH and pick-up head. D of MT1389MH. Proper Check the related circuit on CD_DVDCT signal on MT1389MH CD_DVDCT. MT1389MH. Check CD_DVDCT connection between AM5890 and MT1389MH.
  • Page 20 ELECTRICAL TROUBLESHOOTING GUIDE Normal Audio PWM IC Check connection between output when disc received correct data IC602 BCK, LRCK, ADATA0. playback? stream? Check the related circuit of Normal PWM.(Check Audio out PWM IC out?(IC602). pins28, 31, 33, 34, 37, 39, 42). Check Digital Amp circuit (IC701, IC702).

  • Page 21: Amp Protection

    ELECTRICAL TROUBLESHOOTING GUIDE 6. AMP PROTECTION "PROTECTION" appears on the FLD. After unplug power cord, connect again. Power on. "PROTECTION" appears continuously on the FLD. Is the IC101 pin54 Replace IC101. "LOW" signal(0 V)? Is the Q701 and Replace the Q701 and Q702. Q702 normal? Replace TI AMP IC(IC701, IC702) 2-12...

  • Page 22: Audio Μ-Com Circuit(Dvd & Amp)

    ELECTRICAL TROUBLESHOOTING GUIDE 7. AUDIO μ-COM CIRCUIT(DVD & AMP) Power On. Does Does Aux, Scart, opt and FM 87.5 CD/DVD appear at appear at FLD. FLD? Does Does Reading appear it appear DVD Error at FLD? at FLD? Check Does no Disc or Time power part of Main Refer to SMPS.

  • Page 23: Details And Waveforms On System Test And Debugging

    DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27 MHz CLOCK, RESET, FLASH R/W SIGNAL 1) MT1389MH main clock is at 27 MHz(X500) FIG 1-1 2) MT1389MH reset is high active. Power Cord in P_CTL DVD_RST RESET_IN FIG 1-2 2-14...

  • Page 24: Sdram Clock

    3) Flash R/W enable signal during download(Downloading) SF_DI SF_DO FIG 1-3 2. SDRAM CLOCK 1) MT1389MH main clock is at 27 MHz(X500) DCLK = 93 MHz, Vp-p=2.2, Vmax=2.7 V SDCLK FIG 2-1 2-15...

  • Page 25: Tray Open/Close Signal

    3. TRAY OPEN/CLOSE SIGNAL 1) Tray open/close waveform 2) Tray close waveform OPENSW OPENSW CLOSESW CLOSESW OPEN OPEN CLOSE CLOSE FIG 3-1 FIG 3-2 3) Tray open waveform OPENSW CLOSESW OPEN CLOSE FIG 3-3 2-16...

  • Page 26: Sled Control Related Signal (No Disc Condition)

    4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) M-STBY FIG 4-1 2-17...

  • Page 27: Lens Control Related Signal (No Disc Condition)

    5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) 17 18 FIG 5-1 6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) MDI1 DVDLD CDLD FIG 6-1 2-18...

  • Page 28: Disc Type Judgement Waveforms

    7. DISC TYPE JUDGEMENT WAVEFORMS PU_DET FIG 7-1 (DVD) 23 : This signal can see using special debug program PU_DET FIG 7-2 (DVD) 2-19...
  • Page 29 PU_DET FIG 7-3 (CD) 23 : This signal can see using special debug program PU_DET FIG 7-4 (CD) 2-20...

  • Page 30: Focus On Waveforms

    8. FOCUS ON WAVEFORMS 25 : This signal can see using special debug program PU_DET FIG 8-1 (DVD) PU_DET FIG 8-2 (CD) 27 28 2-21...

  • Page 31: Spindle Control Waveforms (No Disc Condition)

    9. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION) SPIND FIG 9-1 2-22...

  • Page 32: Tracking Control Related Signal (System Checking)

    10. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) PU_DET FIG 10-1(DVD) 32 : This signal can see using special debug program PU_DET FIG 10-2(CD) 2-23...

  • Page 33: Mt1389Mh Video Output Waveforms

    11. MT1389MH VIDEO OUTPUT WAVEFORMS 2) Y 1) Full colorbar signal(COMPOSITE) CVBS FIG 11-2 FIG 11-1 2-24...

  • Page 34: Dvd & Amp Waveforms Mt1389Mh

    12. DVD & AMP WAVEFORMS MT1389MH • FL+ : R640 • RL+ : R641 • WF- : R642 • C+ : R644 WF+ : R643 • FR+ : R645 • RR+ : R646 2-25...
  • Page 35 MEMO 2-26...

  • Page 36: Wiring Diagram

    WIRING DIAGRAM JK202 JK201 TU100 JK701 CN851 COMPONENT HDMI SCART SPK TERMINAL CVBS CN402 CN401 9PIN 18PIN CN103 MAIN+AMP PCB CN202 PN901 12 PIN 16 PIN B’d to B’d CN901 SMPS PCB FRONT JACK PCB PN202 MIC 1,2 PORTABLE IN VOLUME PWR KEY PCB FRONT PCB...

  • Page 37: Block Diagrams

    BLOCK DIAGRAMS 1. BLOCK DIAGRAM-1 Karaoke model: 4M SDRAM EEPROM FLASH Non karaoke: 2M I/O Board R,G,B Scart CVBS CVBS CVBS Y/G, Pb/B, 2CH A MM1692 Composite Pr/R A,B,C,D,E,F,RF 6dB up P/UP Y, Pb, Pr CDDVDCT,VRCD,VRDVD Component CDLD, DVDLD 2CH A MCLK, LRCK, BCK Aux-IN MPEG...
  • Page 38 2. BLOCK DIAGRAM-2 TAS5352 TUNED ST_IND TUNER_CLK Tuner TUNER_DAT RDS_CLK RDS_DAT DVD_CLK DVD_DI PWM_RST DVD_DO MICOM PWMT_CLK DVD_RST PS9850B PWM_DAT MPEG DVD_CE EEP_CLK EEPROM EEP_DAT VFD_DO VFD_STB ADC_RST VFD_CLK CS5346 ADC_CLK OP-AMP ADC_DAT VOL & DRIVER D/L CNT 2-31 2-32...

  • Page 39: Circuit Diagrams

    MODIFIED OR ALTERED WITHOUT PERMISSION IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. FROM THE LG CORPORATION. ALL COMPONENTS PERFORMANCE IMPROVEMENT CHANGES INTO SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL THE SET IS NOT DELAYED UNTIL THE NEW SERVICE TO THOSE IN THE ORIGINAL CIRCUIT.

  • Page 40: Main & Amp - 1 Circuit Diagram

    2. MAIN & AMP - 1 CIRCUIT DIAGRAM 16 26 MAIN & AMP : WAVEFORM NUMBER EBY61070501(#1), REV2.13 2011. 02. 08 2-35 2-36...

  • Page 41: Main & Amp - 2 Circuit Diagram

    3. MAIN & AMP - 2 CIRCUIT DIAGRAM MAIN & AMP : WAVEFORM NUMBER EBY61070501(#2), REV2.13 2011. 02. 08 2-37 2-38...

  • Page 42: Front & Power Key Circuit Diagram

    4. FRONT & POWER KEY CIRCUIT DIAGRAM POWER KEY EBY61051201, REV2.4 2010. 11. 25 FRONT EBY61070601, REV2.1 2010. 11. 25 2-39 2-40...

  • Page 43: Front Jack Circuit Diagram

    5. FRONT JACK CIRCUIT DIAGRAM FRONT JACK EBY61070701, REV2.3 2010. 11. 25 2-41 2-42...

  • Page 44: Circuit Voltage Chart

    CIRCUIT VOLTAGE CHART 1. IC'S VOLTAGE Pin No. Specification EE Mode (V) Playback Mode (V) Pin No. Specification EE Mode (V) Playback Mode (V) IC101 MICOM (LC87F5M64A) 165 (AVDD12) 1.856 1.849 9(VDD2) 2.8~5.5 3.479 3.475 IC502 Flash (W25Q168) 36(VDD3) 2.8~5.5 3.479 3.476 8(VDD)
  • Page 45 2. CAPACITOR'S VOLTAGE Value EE Mode Playback Mode Value EE Mode Playback Mode Voltae Voltae Loca. No Capacitor Loca. No Capacitor Spec Spec Margin Margin Margin Margin (uF) (uF) C106 3.45V 3.45V 6.55V 3.45V 3.45V 6.55V C560 1.53V 1.53V 14.47V 1.48V 1.48V 14.52V...

  • Page 46: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN & AMP P.C. BOARD (TOP VIEW) 2-47 2-48...
  • Page 47 MAIN & AMP P.C. BOARD (BOTTOM VIEW) 2-49 2-50...

  • Page 48: Smps P.c. Board

    2. SMPS P.C. BOARD (BOTTOM VIEW) (TOP VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 2-51 2-52...

  • Page 49: Front P.c. Board

    3. FRONT P.C. BOARD 4. POWER KEY P.C. BOARD (TOP VIEW) (TOP VIEW) (BOTTOM VIEW) (BOTTOM VIEW) 5. FRONT JACK P.C. BOARD (TOP VIEW) (BOTTOM VIEW) 2-53 2-54...
  • Page 50 SECTION 3 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ............................3-3 1. CABINET AND MAIN FRAME SECTION ....................3-3 2. DECK MECHANISM SECTION (DP-15T) ....................3-5 3. SPEAKER SECTION ..........................3-7 3-1. FRONT/ REAR/ CENTER SPEAKER (SH36SF-S) ................3-7 3-2. PASSIVE SUBWOOFER (SH36SU-W) ....................3-8 4.
  • Page 51 MEMO...

  • Page 52: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. CABLE1 PN302 PN202...

  • Page 53: Deck Mechanism Section (Dp-15T)

    MEMO 2. DECK MECHANISM SECTION (DP-15T) 015B 015A 012A...

  • Page 54: Speaker Section

    3. SPEAKER SECTION 3-1. FRONT/ REAR/ CENTER SPEAKER (SH36SF-S) A800 Front SPK A600 Rear SPK A700 Center SPK WIRE80 Front SPK Wire (3M) WIRE70 Center SPK Wire (3M) WIRE60 Rear SPK Wire (7M)

  • Page 55: Passive Subwoofer (Sh36Su-W)

    3-2. PASSIVE SUBWOOFER (SH36SU-W) A900...

  • Page 56: Packing Accessory Section

    4. PACKING ACCESSORY SECTION 808 Battery 825 FM Antenna 801 Owner’s Manual 900 Remote Control 803 Packing 803 Packing 804 Bag 803D Speaker Packing 803A Speaker Packing 803C Speaker Packing 803B Speaker Packing 802 Box...
  • Page 57 MEMO 3-10...
  • Page 58 SECTION 4. MECHANISM (DP-15T) [CONTENTS] DECK MECHANISM PARTS LOCATIONS • Top View ............. . . 4-2 •...

  • Page 59: Deck Mechanism Parts Locations

    DECK MECHANISM PARTS LOCATIONS • Top View Procedure Disass Fig- Parts Fixing Type embly Starting No. Main Base Clamp Assembly Disc 1, 2 Plate Clamp 1, 2, 3 Magnet Clamp 1, 2, 3, 4 Clamp Upper Tray Disc 1, 6 Base Assembly Sled 1, 2, 6 Gear Feed...

  • Page 60: Deck Mechanism Disassembly

    DECK MECHANISM DISASSEMBLY TRAY DISC MAIN BASE DISC CLAMP ASSEMBLY PLATE CLAMP MAGNET CLAMP CLAMP UPPER (Fig. A) BASE MAIN HOLDER LEVER BASE MAIN BASE MAIN BOTTOM SIDE VIEW Fig. 4-1 Fig. 4-2 1. Main Base (Fig. 4-1) 2. Tray Disc (Fig. 4-2) 1) Insert and push a Driver in the emergency eject 1-1.

  • Page 61: Base Assembly Sled

    RUBBER DAMPER Distinguish upper and lower sides (Assemble with care) RUBBER DAMPER Distinguish upper and lower sides RUBBER DAMPER (Assemble with care) BASE PU (S2) (S2) RUBBER DAMPER GENERAL PICK UP ASSEMBLY GEAR RACK SPINDLE MOTOR ASSEMBLY Fig. 4-3 3. Base Assembly Sled (Fig. 4-3) 4.

  • Page 62: Frame Assembly Up/Down

    GUIDE UP/DOWN GEAR LOADING GEAR PULLEY (L6) SCREW INSERTION (L6) TORGUE CONTROL (800gf DOWN) BASE MAIN (L4) BELT LOADING (H1) (C2) PWB ASSEMBLY LOADING (S5) (S4) BASE MAIN (S4) UP/DOWN FRAME ASSEMBLY (L5) GUIDE UP/DOWN FIG. (A) FIG. (B) GUIDE UP/DOWN GUIDE UP/DOWN FIG.

  • Page 63: Deck Mechanism Exploded View (Dp-15T)

    DECK MECHANISM EXPLODED VIEW (DP-15T) 015B 015A 012A...

This manual is also suitable for:

Sh36sf-sSh36su-w

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