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LG HT502PH Service Manual
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LG HT502PH Service Manual

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P/NO : AFN33723352
JULY, 2007
DVD RECEIVER

SERVICE MANUAL

MODEL : HT502PH
SH52PH-C,SH52PH-F,
SH52PH-S,SH52PH-W
Internal Use Only
Website http://biz.lgservice.com

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Summary of Contents for LG HT502PH

  • Page 1: Service Manual

    Internal Use Only Website http://biz.lgservice.com DVD RECEIVER SERVICE MANUAL MODEL : HT502PH SH52PH-C,SH52PH-F, SH52PH-S,SH52PH-W P/NO : AFN33723352 JULY, 2007...

  • Page 2: Table Of Contents

    SECTION 6. REPLACEMENT PARTS LIST ......6-1 Copyright © 2007 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 © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 4 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 © 2007 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 © 2007 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 © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Service Information For Eeprom

    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 © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Specifications

    212 x 395 x 341 mm (W x H x D) Net Weight 3.0 kg 1.15 kg 0.55 kg 6.0 kg Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Section 2. Audio Part

    Check laser circuit. Check focus circuit. Check disc. Does it play? Check tracking servo circuit. Does it output audio? Check audio circuit. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 *2 : PN603 Pins. PIN1 : -35 VKK PIN2 : -30 FL+ PIN3 : -33 FL- PIN7 : +5V PIN13 : +5VA LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 Refer to micom circuit. the PN301 pin11 is ok? Check if the RC2 voltage is ok(5V)? Check rm circuit Resoldering or replace RC2. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 14: Wiring Diagram

    SMPS PCB 9PIN PN204 6630XE00111 CABLE2 EAD35632101 11PIN CABLE1 EAD35201101 PN202 6630R-FB05K 561-711C PN302 KEY PCB VOLUME PN301 FRONT PCB 6630R-FB05R 3PIN Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Block Diagram

    BLOCK DIAGRAM IC508 TAS5152 IC601 TAS5152 TAS5152 TAS5152 IC501 IC204 IC203 AK5358 NJM4580 OPAMP IP9009A LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 16: Circuit Diagrams

    Symbol denotes DC chassis ground. NOTE) Warning NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 2. POWER INTERFACE CIRCUIT DIAGRAM LGE Internal Use Only 2-10 2-11 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 18 3. MPEG CIRCUIT DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 2-12 2-13 LGE Internal Use Only Only for training and service purposes...
  • Page 19 4. SERVO CIRCUIT DIAGRAM LGE Internal Use Only 2-14 2-15 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 5. I/O CIRCUIT DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 2-16 2-17 LGE Internal Use Only Only for training and service purposes...
  • Page 21 6. MIC & USB & PTB CIRCUIT DIAGRAM LGE Internal Use Only 2-18 2-19 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 22 7. POWER KEY CIRCUIT DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 2-20 2-21 LGE Internal Use Only Only for training and service purposes...
  • Page 23 8. TIMER CIRCUIT DIAGRAM LGE Internal Use Only 2-22 2-23 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 9. HDMI CIRCUIT DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 2-24 2-25 LGE Internal Use Only Only for training and service purposes...
  • Page 25 PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW ) LGE Internal Use Only 2-26 2-27 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 2. MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW ) Copyright © 2007 LG Electronics. Inc. All right reserved. 2-28 2-29 LGE Internal Use Only Only for training and service purposes...
  • Page 27 Warning NOTES) Parts that are shaded are critical NOTES) with respect to risk of fire or NOTES) electricial shock. LGE Internal Use Only 2-30 2-31 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 4. KEY P.C. BOARD 5. TIMER P.C. BOARD Copyright © 2007 LG Electronics. Inc. All right reserved. 2-32 2-33 LGE Internal Use Only Only for training and service purposes...
  • Page 29 6. USB P.C. BOARD LGE Internal Use Only 2-34 2-35 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 30: Section 3. Dvd & Amp Part

    Replace IC101. "LOW" signal(0V)? Replace the Q703, Q704 and Q705. Is the Q703, Q704 and 705 normal? Replace TI AMP IC(IC701~704). Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 2. Systemoperati on Routi ne Loop 1. Stop Playback & Open Tray 2. Display tray open message & LOGO Receive CLOSE Key? LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 2. Check systemreset circuit. Update 3. Check FLASH R/Wenable signal PRD, FLASH RWR. successfully? 4. Check FLASH Memory related circuit. Replace FLASH Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 IC501 Pins133, 134, 137, 138, 139, 140 properly? Normal OPEN_SW, CLOSE_SW signal? Check the Tray control IO pins on ES8381. Check the Tray control amplifyung circuit IC401. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 34 Check the related circuit of Driver DRV_MUTE SLEGN pin is High? SLED+ and SLED- output properly? Check Focus connection on ES8381 and motor driver. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 ES8381 RF signal. Check the RF connection between IP9009 and ES8381. Proper SPINDLE signal on ES8381. ES8381 SPNP SPNN output properly? LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 36 ES8381 Proper Check the TRACK connection TRACK signal on ES8381 and motor driver. on ES8381 TR+ & TR- output properly? Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 PWM.(Check Audio out Pins54, 55, 58, 59, 61, 62, 67, 68, 70, 71, 74, 75 Check Digital Amp circuit (IC701, IC702, IC703, IC704) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 38 Check if IC101 Pin15, 16, Check 3.3V line. 47 are high(5V). Check if IC101 Pin1 Check Power section is high. Circuit. Replace IC101. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: Details And Waveforms On System Test And Debugging

    2) ES8381 reset is high active. Power Cord in 5.2VA PWR_CTL(SYSTEM µ-COM) (IC101 PIN2) DVD_RESET(IC101 PIN 41) MRST#(IC501 PIN 251) FIG 1-2 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-10 Only for training and service purposes...
  • Page 40 2. SDRAM CLOCK 1) ES8381 main clock is at 27MHz(X501) DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V (IC502 PIN 38) FIG 2-1 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-11 Only for training and service purposes...
  • Page 41 CLOSE(IC401 PIN 2) FIG 3-1 2) Tray close waveform OPENSW(P4402 PIN3) CLOSESW(P4402 PIN4) OPEN(IC401 PIN 1) CLOSE(IC401 PIN 2) FIG 3-2 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-12 Only for training and service purposes...
  • Page 42 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) SLO(2.0V/1.4V/1.0V) (IC501 PIN 209) DRV_MUTE(5V) – (IC401 PIN 21) SLED+(4.7V/3.6V/1.9V) (IC401 PIN 17) SLED-(5.3V/3.7V/2.5V) (IC401 PIN 18) FIG 4-1 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-13 Only for training and service purposes...
  • Page 43 6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION) DVD MDI(0V/180mV) (IC501 PIN 188) DVDLDO501(5.0V//3.5V) (IC501 PIN 185) CDLDO(5.0V/3.6V) (IC501 PIN 186) FIG 6-1 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-14 Only for training and service purposes...
  • Page 44 CD_DVDCT(IC501 PIN 169) RF(IC501 PIN 196) FIG 7-1 (DVD) F+(IC401 PIN 13) CD_DVDCT(IC501 PIN 169) RF(IC501 PIN 196) FIG 7-2 (DVD) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-15 Only for training and service purposes...
  • Page 45 CD_DVDCT(IC501 PIN 169) RF(IC501 PIN 196) FIG 7-3 (CD) F+(IC401 PIN 13) CD_DVDCT(IC501 PIN 169) RF(IC501 PIN 196) FIG 7-4 (CD) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-16 Only for training and service purposes...
  • Page 46 F-(IC401 PIN 14) FIG 8-1 (DVD) CD_DVDCT(IC501 PIN 169) FOO(IC501 PIN208) F+(IC401 PIN 13) F-(IC401 PIN 14) FIG 8-2 (CD) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-17 Only for training and service purposes...
  • Page 47 10. TRACKING CONTROL RELATED SIGNAL(System checking) CD_DVDCT(IC501 PIN 169) TRO(IC501 PIN 210) TR-(IC401 PIN 12) TR+(IC401 PIN 11) FIG 10-1(DVD) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-18 Only for training and service purposes...
  • Page 48 TR-(IC401 PIN 12) TR+(IC401 PIN 11) FIG 10-2(CD) 11. ES6698FD VIDEO OUTPUT WAVEFORMS 1) Full colorbar signal(COMPOSIT) (IC501 PIN 134) FIG 11-1 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-19 Only for training and service purposes...
  • Page 49 (IC501 PIN 140) FIG 11-2 12. AUDIO OUTPUT FROM PWM IC 1) Audio L/R (IC602 PIN 1, 7) FIG 12-1 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-20 Only for training and service purposes...
  • Page 50 2) Audio related Signal ASDATA3 ADATA0(IC501 PIN 154) BCK(IC501 PIN 155) LRCK(IC501 PIN 156) FIG 12-2 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-21 Only for training and service purposes...
  • Page 51 • R610 → TP601 R613 TP604 R611 TP602 • R614 → TP605 • R616 → TP607 R615 TP606 R617 TP608 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-22 Only for training and service purposes...

  • Page 52: Amp Circuit Diagrams

    AMP CIRCUIT DIAGRAMS 1. AMP CIRCUIT DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 3-23 3-24 LGE Internal Use Only Only for training and service purposes...
  • Page 53 2. DSP CIRCUIT DIAGRAM LGE Internal Use Only 3-25 3-26 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 54 3. µ-COM(MAIN) CIRCUIT DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. 3-27 3-28 LGE Internal Use Only Only for training and service purposes...
  • Page 55 PRINTED CIRCUIT BOARD DIAGRAMS 1. AMP P.C. BOARD DIAGRAM_TOP VIEW LGE Internal Use Only 3-29 3-30 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 56 2. AMP P.C. BOARD DIAGRAM_BOTTOM VIEW Copyright © 2007 LG Electronics. Inc. All right reserved. 3-31 3-32 LGE Internal Use Only Only for training and service purposes...
  • Page 57 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 58: Section 4. Exploded Views

    SECTION 4. EXPLODED VIEWS • CABINET AND MAIN FRAME SECTION CN301 CABLE3 CABLE4 CABLE1 CN902 CABLE2 CN901 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 • DECK MECHANISM EXPLODED VIEW(DP-10A) 015B 015A 012A 012A LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 60 • PACKING ACCESSORY SECTION 824 ANTENNA LOOP(AM) BATTERY 825 ANTENNA (FM) INSTRUCTION ASSEMBLY REMOCON PACKING, CASING PACKING, CASING Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 62: Section 5. Speaker Part

    SECTION 5. SPEAKER PART • CENTER SPEAKER(SH52PH-C) 757A A70B A70A 757B WIRE70 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 • FRONT SPEAKER(SH52PH-F) A80B A80A A80C 855B 855A WIRE80 WIRE81 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 64 4. LHS-96IA • REAR SPEAKER(SH52PH-S) A60B A60A WIRE60 WIRE61 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 2. LHS-76IB • PASSIVE SUBWOOFER(SH52PH-W) A90B A90A WIRE90 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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