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LG HT953TV Service Manual

Dvd receiver system
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Internal Use Only
Website http://biz.lgservice.com
DVD RECEIVER SYSTEM
SERVICE MANUAL
MODEL: HT953TV
P/NO : AFN55910038
APRIL, 2008
(HT953TV-AP, SH93TV-S/C/A, ST3TV)

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Summary of Contents for LG HT953TV

  • Page 1 Internal Use Only Website http://biz.lgservice.com DVD RECEIVER SYSTEM SERVICE MANUAL MODEL: HT953TV P/NO : AFN55910038 APRIL, 2008 (HT953TV-AP, SH93TV-S/C/A, ST3TV)
  • Page 2 ....... . 4-1 Copyright © 2008 LG Electronics. Inc. All right reserved.

  • Page 3: Section 1. General

    (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 4: Notes Regarding Compact Disc Player Repairs

    7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. Armband Resistor (1 Mohm) Resistor Conductive (1 Mohm) Sheet Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 5: Esd Precautions

    THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 6 OPT D OPT E OPT F OPT G Press pause key once Change will be applied when power OFF-->ON. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 FLD ‘write ok’ or ‘up ok’ Remote control ‘2’ + Front ‘STOP’ push same timing FLD display E2P CLR or EP CLR Auto power off LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 8 6. When the power is turned on, the language selection menu is initially displayed. After selecting the desired language, press the SELECT/ENTER. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Specifications

    245 x 415 x 435 mm Net Weight 6.5 kg 2.3 kg 13.2 kg Designs and specifications are subject to change without prior notice. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Section 2. Electrical Part

    Does initial read work? Check focus circuit. Check disc. Check tracking servo circuit. Does it play? Does it output Check audio circuit. audio? Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 *2 : DIG1 Pins. PIN2 : 5VA, PIN3 : 5V, PIN3 : 5V, PIN56 : -30 VEE, PIN48 : 5V VDD LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 CN2A1 Pin5 is ok? Check if RM2A1 voltage is ok(5V)? Refer to RCU circuit. Resolder or Replace RM2A1 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 2. System operation routine loop. 1. Stop Playback & Open Tray. 2. Display tray open message & LOGO. Receive CLOSE Key? LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 2. Check system reset circuit. Update 3. Check FLASH R/W enable signal PRD, FLASH successfully? RWR. 4. Check FLASH Memory related circuit. Replace FLASH. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Check the Tray control MOTOR LOAD+ & LOAD-signal? & SERVO circuit IC401. Check AV cable connection between main PCBA and loader. (MECHA) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 16 Check the amp circuit on motor Proper F+ & F- outputs? driver. Check cable connection with pick-up head. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Check the spindle control amp SPNN output circuit of motor driver. properly? Check the cable connection between spindle and main PCB. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 18 Check the tracking control amp TR+ & TR-output circuit on motor driver. properly? Check cable connection on pick-up head. Disc Playback? Check RF signal waveform. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 Pins 54, 55, 58, 59, 61, 62, 67, 68, 70, 71, 74, 75). Check Digital Amp circuit TEST END. (IC701, IC702, IC703, IC704). LGE Internal Use Only 2-10 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 FLD. Is the system cable Check the System cable of connection. connected correctly? Replace AMP IC(IC701, IC702, IC703, IC704) Copyright © 2008 LG Electronics. Inc. All right reserved. 2-11 LGE Internal Use Only Only for training and service purposes...
  • Page 21 IC101 Pin9,36,59 are Check 5V line. high(5V). Check Check power section if IC101 Pin44 Check SMPS. circuit. is high. Replace IC101. LGE Internal Use Only 2-12 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 22: Details And Waveforms On System Test And Debugging

    1) ES8391 main clock is at 27MHz(X501) FIG 1-1 2) ES8391 reset is high active. IC101 PWR_CTL DVD_RESET MRST# FIG 1-2 IC501 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-13 LGE Internal Use Only Only for training and service purposes...

  • Page 23: Sdram Clock

    2) Tray close waveform 1) Tray open/close waveform OPENSW( OPENSW CLOSESW CLOSESW OPEN OPEN CLOSE CLOSE FIG 3-2 FIG 3-1 LGE Internal Use Only 2-14 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 24: Sled Control Related Signal (No Disc Condition)

    OPENSW CLOSESW OPEN CLOSE FIG 3-3 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) DRV_MUTE SLED+ IC501 SLED- FIG 4-1 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-15 LGE Internal Use Only Only for training and service purposes...

  • Page 25: Lens Control Related Signal (No Disc Condition)

    FIG 5-1 6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) DVD MDI IC501 DVDLDO501 CDLDO FIG 6-1 19 18 IC501 LGE Internal Use Only 2-16 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 26: Disc Type Judgement Waveforms

    7. DISC TYPE JUDGEMENT WAVEFORMS CD_DVDCT CD_DVDCT FIG 7-1 (DVD) FIG 7-2 (DVD) CD_DVDCT CD_DVDCT FIG 7-4 (CD) FIG 7-3 (CD) IC501 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-17 LGE Internal Use Only Only for training and service purposes...

  • Page 27: Focus On Waveforms

    CD_DVDCT IC501 FIG 8-1 (DVD) CD_DVDCT FIG 8-2 (DVD) 9. SPINDLE CONTROL WAVEFORMS (NO DISC CONDITION) SPINO IC501 FIG 9-1 LGE Internal Use Only 2-18 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 28: Tracking Control Related Signal (System Checking)

    10. TRACKING CONTROL RELATED SIGNAL (System checking) CD_DVDCT IC501 FIG 10-1 (DVD) CD_DVDCT IC501 FIG 10-2 (CD) Copyright © 2008 LG Electronics. Inc. All right reserved. 2-19 LGE Internal Use Only Only for training and service purposes...
  • Page 29 11. ES8391 VIDEO OUTPUT WAVEFORMS 1) Full colorbar signal (COMPOSIT) IC501 FIG 11-1 2) Y IC501 FIG 11-2 LGE Internal Use Only 2-20 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 30 12. AUDIO OUTPUT FROM PWM IC 1) Audio related Signal ADATA0 ASDATA3 LRCK IC501 FIG 12-1 IC501 IC501 Copyright © 2008 LG Electronics. Inc. All right reserved. 2-21 LGE Internal Use Only Only for training and service purposes...
  • Page 31 C+ : TP9 ¡ R757 W+ : TP13 ¡ R731 C- : TP11 ¡ R762 W- : TP16 ¡ R745 LGE Internal Use Only 2-22 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 6pin FFC Cable 4pin FFC Cable HDMI Slot MD 23pin FFC Cable 60pin FFC Cable MAIN 5pin FFC Cable 2-23 2-24 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 /DAC_RST VIDEO NJM4580 DRIVER DRIVER CVBS BH7868 BH7868 FL,FR,C,SL,SR.LEF ( 6 ) Composite,Y, Pb, Pr, (4) SYSTEM CABLE (36PIN) 2-25 2-26 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 34: Mpeg Circuit Diagram

    ❏ MAIN PART CIRCUIT DIAGRAMS 1. MPEG CIRCUIT DIAGRAM 2008.04. 17 2-27 2-28 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 2. SERVO INTERFACE CIRCUIT DIAGRAM 2008.04. 17 2-29 2-30 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 36: Interface Circuit Diagram

    3. INTERFACE CIRCUIT DIAGRAM 2008.04. 17 2-31 2-32 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 4. AUDIO MICOM CIRCUIT DIAGRAM 2008.04. 17 2-33 2-34 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 38 5. DC-DC CONVERTOR CIRCUIT DIAGRAM 2008.04. 07 2-35 2-36 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 6. SYSTEM JACK & IPOD CIRCUIT DIAGRAM 2008.04. 07 2-37 2-38 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 40 7. HDMI RX & USB CIRCUIT DIAGRAM 2008.04. 07 2-39 2-40 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 8. HDMI TX CIRCUIT DIAGRAM 2008.04. 07 2-41 2-42 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 42 9. MIC (OPTION) CIRCUIT DIAGRAM 2008.04. 07 2-43 2-44 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 10. VFD & RCU CIRCUIT DIAGRAM 2008.04. 17 2-45 2-46 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 44 11. TOUCH KEY CIRCUIT DIAGRAM 2008.04. 07 2-47 2-48 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 12. TOUCH POWER CIRCUIT DIAGRAM 2008.04. 07 2-49 2-50 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 46 RDVC18 23, 35, 74, 79, 92, 105, 114, 128, 139 EEPROM (IC803) Names Pin Numbers Voltage EEP_VCC 4.32 V 2-51 2-52 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 ❏ MAIN PART PRINTED CIRCUIT DIARGAMS 1-1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW ) EAX43556404 EAX43556404 2-53 2-54 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 48 1-2. MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-55 2-56 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 2-2. INTERFACE P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 3-1. HDMI/USB P.C. BOARD DIAGRAM ( TOP VIEW ) 3-2. HDMI/USB P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-57 2-58 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 50 4-1. VFD P.C. BOARD DIAGRAM ( TOP VIEW ) 4-2. VFD P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-59 2-60 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 6-1. TOUCH POWER P.C. BOARD DIAGRAM ( TOP VIEW ) 6-2. TOUCH POWER P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-61 2-62 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 52 ❏ ACTIVE WOOFER PART WIRING DIAGRAM AMP I/O 10pin Harness Cable 14pin Harness Cable 15pin Harness Cable SMPS 2-63 2-64 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 5152 SPK RL+ SCART SPK RL- RL+/RL- +3.3V RR+/RR- SPK RL+ SMPS SMPS 5152 5152 SPK RL- +35V, +12V 2-65 2-66 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 54: Smps(Power) Circuit Diagram

    2008.04. 07 NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock. 2-67 2-68 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 55: Pwm Circuit Diagram

    2. PWM CIRCUIT DIAGRAM EBY43105101 (#1) 2008.04. 07 2-69 2-70 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 56: Amp Circuit Diagram

    3. AMP CIRCUIT DIAGRAM 2008.04. 07 2-71 2-72 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 57 4. I/O INTERFACE CIRCUIT DIAGRAM 2008.04. 07 2-73 2-74 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 58 5. SPEAKER TERMINAL CIRCUIT DIAGRAM 2008.04. 07 2-75 2-76 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 1. SMPS P.C. BOARD DIAGRAM NOTE: Warning Parts that are shaded are critical With respect to risk of fire or electrical shock. 2-77 2-78 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 60 2-1. AMP(5.1CH) P.C. BOARD DIAGRAM ( TOP VIEW ) 2-79 2-80 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 2-2. AMP(5.1CH) P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-81 2-82 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 62 3-1. AMP I/O P.C. BOARD DIAGRAM ( TOP VIEW ) 2-83 2-84 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 3-2. AMP I/O P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-85 2-86 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 64 4-1. TERMINAL P.C. BOARD DIAGRAM ( TOP VIEW ) 4-2. TERMINAL P.C. BOARD DIAGRAM ( BOTTOM VIEW ) 2-87 2-88 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 2-89 2-90 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 66: Section 3. Exploded Views

    SECTION 3. EXPLODED VIEWS ❏ CABINET AND MAIN FRAME SECTION CABLE4 MAIN HDMI CABLE2 CABLE1 CABLE3 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 67 ❏ DECK MECHANISM EXPLODED VIEW(SDP-06) 012A 012A 012A LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 68: Speaker Section

    ❏ SPEAKER SECTION 1. ACTIVE SUBWOOFER(SH93TV-A) 952A 954B 952B 954A 263A 264A A52A P26A1 CN901 CN902 JACK A90A A45A SMPS A47A Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 70 2. CENTER SPEAKER(SH93TV-C) 756A 756B 7 6 1 7 6 1 WIRE70 : GREEN Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 71 3. FRONT/REAR SPEAKER(SH93TV-S) 857B A80A A80B 857A WIRE80 : RED(F.R) WIRE81 : WHITE(F.L) WIRE60 : GRAY(R.R) WIRE61 : BLUE(R.L) LGE Internal Use Only 3-10 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 72 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-11 LGE Internal Use Only Only for training and service purposes...

  • Page 73: Packing Accessory Section

    WIRE80 RED 4M (F.R) WIRE81 WHITE 4M (F.L) WIRE70 GREEN 4M (CENTER) WIRE60 GRAY 10M (R.R) WIRE61 BLUE 10M (R.L) LGE Internal Use Only 3-12 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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