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3-1

ELECTRICAL TROUBLESHOOTING GUIDE

SECTION 3. DVD & AMP PART

1. AMP PROTECTION

"PROTECTION" appears on the FLD.

Power on.

Replace TI AMP IC(IC701~704).

"PROTECTION"

appears continuously on the FLD.

Is the IC101 pin64

"LOW" signal(0V)?

Is the Q703, Q704 and 705 normal?

After unplug power cord, connect again.

OK.

Replace IC101.

Replace the Q703, Q704 and Q705.

No

No

No

Yes

Yes

Yes

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

LGE Internal Use Only

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Summary of Contents for HT502PH

Page 1: ...MANUAL MODEL HT502PH SH52PH C SH52PH F SH52PH S SH52PH W SERVICE MANUAL P NO AFN33723352 MODEL HT502PH SH52PH C SH52PH F SH52PH S SH52PH W JULY 2007 DVD RECEIVER Website http biz lgservice com Internal Use Only ...

Page 2: ...AM 2 4 BLOCK DIAGRAM 2 6 CIRCUIT DIAGRAMS 2 8 PRINTED CIRCUIT DIARGAMS 2 26 SECTION 3 DVD AMP PART ELECTRICAL TROUBLESHOOTING GUIDE 3 1 AMP CIRCUIT DIAGRAMS 3 23 PRINTED CIRCUIT DIARGAMS 3 29 SECTION 4 EXPLODED VIEWS 4 1 SECTION 5 SPEAKER PART 5 1 SECTION 6 REPLACEMENT PARTS LIST 6 1 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 3: ...ser beams to enter the eyes Also NEVER switch ON the power to the laser output part lens etc of the pick up if it is damaged 5 Cleaning the lens surface If there is dust on the lens surface the dust should be cleaned away by using an air bush such as used for camera lens The lens is held by a delicate spring When cleaning the lens surface therefore a cotton swab should be used taking care not to d...

Page 4: ...pply lead wire from the unit 2 All equipment measuring instruments and tools must be grounded 3 The workbench should be covered with a conductive sheet and grounded When removing the laser pick up from its conductive bag do not place the pick up on the bag This is because there is the possibility of damage by static electricity 4 To prevent AC leakage the metal part of the soldering iron should be...

Page 5: ... propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparable conductive materials 7 Immediately before removing the p...

Page 6: ... appropriate position and make changes Press pause key once Change will be applied when power OFF ON NAME OPT 1 OPT 2 OPT 3 OPT 4 OPT 5 OPT 6 OPT 7 OPT 8 OPT 9 OPT A OPT B OPT C OPT D OPT E OPT F OPT G HEX 4B 45 30 E7 5F 05 F8 31 4F 00 00 00 00 00 00 00 DETECT NEW EEPROM OPTION EDIT SCREEN Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use ...

Page 7: ...ppropriate position and make changes Press ENTER key once FLD write ok or up ok Remote control 2 Front STOP push same timing FLD display E2P CLR or EP CLR Auto power off DETECT NEW EEPROM OPTION EDIT SCREEN NAME HEX 00 06 01 7A 02 3B 03 00 00 00 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 8: ...dB Mono Frequency Response 140 8 000 Hz AM MW Tuning Range 522 1 620 kHz or 520 1 720 kHz Intermediate Frequency 450 kHz AMPLIFIER Stereo mode 70 W 70 W 4Ω at 1 kHz THD 10 Surround mode Front 70 W 70 W THD 10 Center 70 W Surround 70 W 70 W 4Ω at 1 kHz THD 10 Subwoofer 150 W 3Ω at 30 Hz THD 10 Inputs AUDIO IN OPTICAL IN Outputs MONITOR OUT EURO AV TO TV OUT COMPONENTVIDEO OUT SPEAKERS Front Speaker...

Page 9: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 10: ... supply circuit NO Check power supply circuit NO Check laser circuit Check focus circuit Check disc NO NO Check tracking servo circuit Check audio circuit Does red power led turn on Is power on Does initial read work Does it play Does it output audio OK Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 11: ... buttons are ok Check if the front power is ok 2 Check if the DIS301 is ok NO 1 Check if the remote controller is ok NO 2 Power on Front b d ok 1 When it is needed to reconnected FFC cable into PN301 Short 1pin of PN103 with 18pin of CN901 in amp part 2 PN603 Pins PIN1 35 VKK PIN2 30 FL PIN3 33 FL PIN7 5V PIN13 5VA Copyright 2007 LG Electronics Inc All right reserved Only for training and service ...

Page 12: ...efer to micom circuit 1 NO Refer to power SMPS NO Refer to micom circuit NO Check rm circuit Check if the power part of the front is ok Check if the remote controller waveform of the PN301 pin11 is ok Check if the RC2 voltage is ok 5V Resoldering or replace RC2 2 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 13: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 14: ...5219301 MIC2 USB STEREO PN301 PN103 P4401 6630XE00123 23PIN CN902 CN901 P4402 6630XE00109 3PIN 15PIN 9PIN 14PIN TUNER KEY PCB 561 711O 6630XE00120 6630XE00120 6630XE00124 EAD35214501 EAD35219501 561 715N 561 661B 6630XE01224 6630XE00118 561 711C 6630R FB05R CABLE3 EAD35201502 CABLE1 EAD35201101 CABLE4 EAD35201302 CABLE2 EAD35632101 EAD35214501 EAD35219501 Copyright 2007 LG Electronics Inc All righ...

Page 15: ...4 AK5358 ADC IC203 NJM4580 OPAMP DVD_DI DVD_CLK DVD_CE DVD_DO IC501 IP9009A IC601 TAS5152 TAS5152 TAS5152 TAS5152 FL FR WF C RL RR Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 16: ...ORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTI CAL TO THOSE IN THE ORIGINAL CIRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF FER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED...

Page 17: ... POWER INTERFACE CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 18: ... 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 3 MPEG CIRCUIT DIAGRAM Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 19: ... 15 4 SERVO CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 20: ...2 17 5 I O CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 21: ... 6 MIC USB PTB CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 22: ...1 7 POWER KEY CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 23: ... 23 8 TIMER CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 24: ... 25 9 HDMI CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 25: ...PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD DIAGRAM TOP VIEW 2 26 2 27 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 26: ...2 28 2 29 2 MAIN P C BOARD DIAGRAM BOTTOM VIEW Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 27: ...ng NOTES Parts that are shaded are critical NOTES with respect to risk of fire or NOTES electricial shock 2 30 2 31 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 28: ...2 32 2 33 4 KEY P C BOARD 5 TIMER P C BOARD Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 29: ...2 34 2 35 6 USB P C BOARD Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 30: ...C701 704 PROTECTION appears continuously on the FLD Is the IC101 pin64 LOW signal 0V Is the Q703 Q704 and 705 normal After unplug power cord connect again OK Replace IC101 Replace the Q703 Q704 and Q705 No No No Yes Yes Yes Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 31: ...pen Tray 2 Display tray open message LOGO 1 Execute Pressed Key IR Key 2 Systemoperati on Routi ne Loop 1 Judge whether have disc and disc type 2 Jump to related disc reading procedure SLED at Inner Side 1 IC101 initializes SERVO DSP RISC registers 2 Write RISC code to SDRAM 3 Reset RISC Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use On...

Page 32: ...ignal PRD RWR 4 Check FLASH Memory related circuit Check the AC Vol tage Power PCBA 110V or 220V Switch on the Power PCBA Is the DC Voltage outputs OK 35V 30V 33V 12V 3 5V 5 6V 5V 12V 5 6V 3 3V 5V 7V 32 5V Are 3 3V and 5V DC outputs normal on main PCBA Update FLASH successfully Replace FLASH A Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal ...

Page 33: ...ins on ES8381 Check the Tray control amplifyung circuit IC401 Check connection lines between SDRAM IC502 ES8381 and the SDRAM is damaged ES8381 VIDEO outputs properly Normal OPEN_SW CLOSE_SW signal Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 34: ...High SLED and SLED output properly Check the connection line of DRV_MUTE Check the related circuit of SLEGN Check Focus connection on ES8381 and motor driver Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 35: ...er transistor is OK Q405 Q406 Proper RF signal on ES8381 Proper SPINDLE signal on ES8381 SPNP SPNN output properly Check the related circuit on ES8381 RF signal Check the RF connection between IP9009 and ES8381 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 36: ...perly Check CD_DVDCT connection between IP9009 and ES8381 Check the related circuit on ES8381 CD DVDCT Check connections between ES8381 and pick up head Check the related circuit on ES8381 Check the TRACK connection on ES8381 and motor driver Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 37: ...PWM Check Audio out Pins54 55 58 59 61 62 67 68 70 71 74 75 Normal PWM IC out IC601 PWM IC received correct data stream Check Digital Amp circuit IC701 IC702 IC703 IC704 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 38: ...lator Circuit Check IC101 Reset Waveform Check 3 3V line Check Power section Circuit NO Check power part of Main B D Check oscillator of X101 Check if IC101 Pin41 is high Check if IC101 Pin15 16 47 are high 5V Check if IC101 Pin1 is high Replace IC101 NO NO Check if DVD an Audio Micom Insert is OK Check Power YES Check DVD Module YES Check SMPS YES YES YES YES YES YES YES Copyright 2007 LG Electro...

Page 39: ...1 ES8381 main clock is at 27MHz X501 3 8V 27MHz FIG 1 1 2 ES8381 reset is high active PWR_CTL SYSTEM µ COM IC101 PIN2 5 2VA Power Cord in DVD_RESET IC101 PIN 41 MRST IC501 PIN 251 FIG 1 2 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 40: ...C502 PIN 38 DCLK 93MHz Vp p 2 2 Vmax 2 7V FIG 2 1 3 Flash R W enable signal during download Downloading FRD IC503 PIN 28 FWR IC503 PIN 11 FIG 1 4 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 41: ...CLOSESW P4402 PIN4 OPEN IC401 PIN 1 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 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 42: ...C401 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 3 Tray open waveform OPENSW P4402 PIN3 CLOSESW P4402 PIN4 OPEN IC401 PIN 1 CLOSE IC401 PIN 2 FIG 3 3 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 43: ... 13 F 4 0V 3 6V 3 2V IC401 PIN 14 FIG 5 1 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 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ...9 RF IC501 PIN 196 FIG 7 2 DVD 7 DISC TYPE JUDGEMENT WAVEFORMS F IC401 PIN 13 CD_DVDCT IC501 PIN 169 RF IC501 PIN 196 FIG 7 1 DVD Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 45: ...VDCT 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 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 46: ...01 PIN 13 F IC401 PIN 14 FIG 8 2 CD 8 FOCUS ON WAVEFORMS CD_DVDCT IC501 PIN 169 FOO IC501 PIN208 F IC401 PIN 13 F IC401 PIN 14 FIG 8 1 DVD Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 47: ...501 PIN 192 SP 3 6V 4 8V IC501 PIN 191 FIG 9 1 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 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

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 Only for training and service purposes LGE Internal Use Only ...

Page 49: ...0 2 Y IC501 PIN 140 FIG 11 2 1 Audio L R FIG 12 1 12 AUDIO OUTPUT FROM PWM IC IC602 PIN 1 7 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 50: ...K IC501 PIN 155 LRCK IC501 PIN 156 ASDATA3 2 Audio related Signal ADATA0 IC501 PIN 154 FIG 12 2 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ...19 TP610 3 R612 TP603 or R613 TP604 4 R610 TP601 or R611 TP602 5 R614 TP605 or R615 TP606 6 R616 TP607 or R617 TP608 13 DVD AMP WAVEFORMS Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...RCUIT DIAGRAMS 1 AMP CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 53: ... 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 3 25 3 26 2 DSP CIRCUIT DIAGRAM Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ... 3 µ COM MAIN CIRCUIT DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 55: ...PRINTED CIRCUIT BOARD DIAGRAMS 1 AMP P C BOARD DIAGRAM_TOP VIEW 3 29 3 30 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 56: ...3 31 3 32 2 AMP P C BOARD DIAGRAM_BOTTOM VIEW Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 58: ...E C N E S E R P E H T O T E C I V R E S N I N O I T A M R O F N I Y T E F A S E R U T A R E T I L A A D G F D E B C C G F N O I T P O L A 5 6 3 2 S P M S P M A N I A M E A43 279 CABLE1 A50 280 465 CN301 283 A26 463 463 CABLE3 CABLE2 CABLE4 A46 250 463 471 CN902 CN901 A41 A44 260 276 465 265 261 261 320 465 A47 463 A45 300 463 462 2 6 462 261 B 463 Copyright 2007 LG Electronics Inc All right reserv...

Page 59: ... A01 020 018 014 013 017 435 012 A26 019 012 440 015B 015A 015 016 A02 439 012A 012A 010 432 030 025 024 439 431 435 430 021 036 A03 4 3 4 4 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 60: ...08 INSTRUCTION ASSEMBLY 801 REMOCON 900 BAG 804 PACKING CASING 803 BOX 802 PACKING CASING 803 824 ANTENNALOOP AM 825 ANTENNA FM Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 61: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 62: ...ART CENTER SPEAKER SH52PH C 5 1 A70 A70A A70B 751 753 752 753 751 750 755 756 753 754 WIRE70 757B 757A Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 753 ...

Page 63: ... 2 A80 A80A A80B 850 851 852 853 852 855 853 855A 855B 854 853 856 862 858 857 859 853 A80C WIRE80 WIRE81 861 860 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 64: ...LHS 96IA REAR SPEAKER SH52PH S A60 650 651 652 654 656 655 653 A60B A60A WIRE60 WIRE61 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 3 ...

Page 65: ...IVE SUBWOOFER SH52PH W A90 952 950 A90A 953 A90B 956 955 957 954 WIRE90 958 952 959 959 958 952 951 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 4 ...

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