LG LHB675 Service Manual Download

Page: 82 / 109

2-78

2-77

: WAVEFORM NUMBER

PWM

EAX66489201 Rev1.0(0) MAIN+AMP(#9)

2015.01.22

9. MAIN & AMP - PWM CIRCUIT DIAGRAM

Summary of Contents for LHB675

Page 1: ...BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Internal Use Only Website http biz lgservice com 3D Blu ray DVD Home Theater System SEPTEMBER 2015 P NO AFN77133597 MODEL LHB675 LHB675 S65T3 S MODEL LHB675 LHB675 S65T3 S ...

Page 2: ...1 1 CONTENTS SECTION 1 SUMMARY SECTION 2 ELECTRICAL SECTION 3 CABINET MAIN CHASSIS SECTION 4 MT8563 F E LOADER PART SECTION 5 REPLACEMENT PARTS LIST ...

Page 3: ...FOR BD HTS PRODUCTS 1 3 SERVICING PRECAUTIONS 1 4 GENERAL SERVICING PRECAUTIONS INSULATION CHECKING PRODEDURE ELECTROSTATICALLY SENSITIVE ES DEVICES INITIAL SYSTEM SETUP 1 5 HIDDEN KEY MODE 1 7 FIRMWARE UPDATE GUIDE 1 9 NETWORK SOFTWARE UPDATE 1 10 SPECIFICATIONS 1 12 ...

Page 4: ... sharp solder points Be certain to remove all loose foreign par ticles 4 Check for physical evidence of damage or deterioration to parts and compo nents for frayed leads or damaged insulation including the AC cord and replace if necessary 5 No lead or component should touch a high current device or a resistor rated at 1 watt or more Lead tension around protruding metal surfaces must be avoided 6 A...

Page 5: ...tal panels Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensitive ES Devices Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components The following techniques should be...

Page 6: ...nals of the speakers After verifying the test tone signals press ENTER while Stop is highlighted Select Next and press ENTER 6 You can listen to TV sound through HTS Speaker automatically when TV is turned on Press to move and press to select On or Off Select Next and press ENTER 7 Check all the settings that you have set in the previous steps Press ENTER while Finish is highlighted to finish the ...

Page 7: ...1 6 8 Displays private sound mode guide Press ENTER 9 Displays the guide to enjoy online contents using LG AV Remote Press ENTER ...

Page 8: ...use 1 7 3 9 pause 1 7 3 9 display LOC UNLOC VFD for 3 sec Enter leave Front Lock mode by toggle See the Demo Lock sheet System Log Save to Flash ALWAYS AVAILABLE Clear key RCU 3 seconds Hold simulta neously X OK VFD Save Log Data to Flash Change Resolution ALWAYS AVAILABLE Push Stop key 5 sec X 480P or 576P on VFD Change the Resolution to 480P or 576P Chage Video System Open and Home Menu OFF Vide...

Page 9: ...TATUS Front Stop RMC Stop for 5s Toggling D UNLOCK display for 3s Version Check POWER ON STATUS Front Stop RMC Play for 5s POWER OFF M 0807031 Display MICOM Ver OPTION CODE Touch Key Ver EEPROM INITIAL POWER ON STATUS Front Stop RMC 0 for 5s auto exit E2P CLEAR EEPROM EDIT POWER ON STATUS Front Stop RMC 2 for 5s Toggling OP0 10 Wireless spk remate POWER ON STATUS Front Stop RMC mute REMATE 2 MICOM...

Page 10: ...DATE FIRMWARE 1 Insert USB or CD ROM which has an update file 2 OSD responds to the insertion event 3 OSD is shown as below Caution Do not turn off the power during the software update Note If the software includes the driver update disc tray may open during the process 3 AFTER UPDATE COMPLETE 1 When update is completed the power will be turned off automatically in a few seconds 2 Turn the power b...

Page 11: ...dating the software in your player remove any disc and USB Device from the player Before updating the software in your player turn the player off and then turn it back on During the software update procedure do not turn off the player or disconnect AC power or do not press any button If you cancel the update turn off the power and turn it on for stable performance This unit cannot be updated to pr...

Page 12: ...ay may open during the process 8 When update is completed the power will be turned off automatically in a few seconds 9 Turn the power back on The system now operates with the new version Note The Software Update function may not work properly depending on your internet environment In this case you can obtain the latest software from the authorized LG Electronics Service Center then update your pl...

Page 13: ...Connector x 1 ANALOG AUDIO IN 2 0 Vrms 1 kHz 0 dB 600 Ω RCA jack L R x 1 DIGITAL IN OPTICAL 3 V p p Optical jack x 1 TUNER FM Tuning Range 87 5 to 108 0 MHz or 87 50 to 108 00 MHz AMPLIFIER Power output 3 Ω RMS THD 10 Total 1000 W Front 167 W x 2 Surround 167 W x 2 Sub Woofer 167 W x 2 SYSTEM Laser Semiconductor laser Wavelength 405 nm 650 nm Signal system Standard NTSC color TV system Frequency r...

Page 14: ...pedance Front Speaker 3 Ω Surround Rear Speaker 3 Ω Subwoofer 3 Ω Rated Input Power Front Speaker 167 W Surround Rear Speaker 167 W Subwoofer 167 W Max Input Power Front Speaker 334 W Surround Rear Speaker 334 W Subwoofer 334 W Net Dimensions W x H x D 233 x 998 x 310 mm Net Weight 1EA 12 5 kg Design and specifications are subject to change without notice ...

Page 15: ...1 14 ...

Page 16: ... 1 SYSTEM PART 1 MPEG CRYSTAL 27 MHz 2 52 2 SYSTEM PART 2 DDR3 MEMORY 2 53 3 AUDIO PART 1 ADC I2C 2 54 4 AUDIO PART 2 PWM I2S I2C 2 55 5 HDMI PART 2 56 WIRING DIAGRAM 2 57 BLOCK DIAGRAM 2 59 CIRCUIT DIAGRAMS 2 61 1 SMPS CIRCUIT DIAGRAM 2 61 2 MAIN AMP MICOM CIRCUIT DIAGRAM 2 63 3 MAIN AMP POWER CIRCUIT DIAGRAM 2 65 4 MAIN AMP MPEG CIRCUIT DIAGRAM 2 67 5 MAIN AMP MEMORY CIRCUIT DIAGRAM 2 69 6 MAIN ...

Page 17: ... disc Multiple discs displaying the problem could indicate the BD lens needs to be cleaned Recommend the customer use a lens cleaner on the BD A lens cleaner is available at any local electronics retailer Do lines appear when watching multiple discs NO YES One disc displaying the issue is a problem with the disc Multiple discs displaying the problem could indicate the BD lens needs to be cleaned R...

Page 18: ...ner is available at any local electronics retailer Do lines appear when watching a TV program NO YES Ghosting appearing when watching a TV program indicates an issue with the display If the TV program is fine then connect the BD to another input on the display to determine if the problem is following the BD Does ghosting appear when the BD is connected to another TV NO YES Connect the BD to anothe...

Page 19: ...ner is available at any local electronics retailer Does rolling appear when watching a TV program NO YES Rolling appearing when watching a TV program indicates an issue with the display If the TV program is fine then connect the BD to another input on the display to determine if the problem is following the BD Does rolling appear when the BD is connected to another TV NO YES Connect the BD to anot...

Page 20: ...ner is available at any local electronics retailer Does shaking appear when watching a TV program NO YES Shaking appearing when watching a TV program indicates n issue with the display If the TV program is fine then connect the BD to another input on the display to determine if the problem is following the BD Does shaking appear when the BD is connected to another TV NO YES Connect the BD to anoth...

Page 21: ...s available at any local electronics retailer Does blurriness appear when watching a TV program NO YES Blurriness appearing when watching a TV program indicates an issue with the display If the TV program is fine then connect the BD to another input on the display to determine if the problem is following the BD Does blurriness appear when the BD is connected to another TV NO YES Connect the BD to ...

Page 22: ... TV is on the correct input Turn TV off then on to determine input Video when using composite or component DVI when using DVI and HDMI when using HDMI Is the customer able to watch TV programming NO YES If the customer is not able to watch television then he may have a problem with his television especially if the cable signal comes through on a different input If the customer can not get a TV pro...

Page 23: ...ine input Video when using composite or component DVI when using DVI and HDMI when using HDMI Is the customer able to watch TV programming NO YES If the customer is not able to watch television then he may have a problem with his television especially if the cable signal comes through on a different input If the customer can not get a TV program then he still may have a problem with the particular...

Page 24: ... when using composite or component DVI when using DVI and HDMI when using HDMI Is the customer able to watch TV programming NO YES If the customer is not able to watch television then he may have a problem with his television especially if the cable signal comes through on a different input If the customer can not get a TV program then he still may have a problem with the particular input on his T...

Page 25: ...ut Video when using composite or component DVI when using DVI and HDMI when using HDMI Is the customer able to watch TV programming NO YES If the customer is not able to watch television then he may have a problem with his television especially if the cable signal comes through on a different input If the customer can not get a TV program then he still may have a problem with the particular input ...

Page 26: ... menu Is the display HDCP compliant NO YES Make sure the display is HDCP compliant when using a DVI or HDMI connection A lack of HDCP compliancy on the display may cause an invalid format or format not supported message to appear It can also cause a copy protection OSD to appear Has the customer tried the device on another display NO YES Ask the customer to connect the device to another display If...

Page 27: ...e discs in the owners manual Multiple discs displaying the problem indicates a problem with the BD player Does color appear when watching a TV program NO YES If the cable or satellite programming is connected through another input and the customer does not get color the customer has a problem with his television If a TV program does have the color the problem may be the BD player the cables being ...

Page 28: ...color fine when watching a TV program NO YES If the cable or satellite programming is connected through another input and the customer does not get color the customer has a problem with his television If a TV program does have the color the problem may be the BD player the cables being used or the TV itself Is color fine when the BD is connected to another TV NO YES Connect the BD to another TV an...

Page 29: ...ltiple discs could indicate a lens cleaner is needed The customer can purchase a lens cleaner at any electronics retailer Problem occur when watching TV program NO YES No audio from a TV program on a different channel or input means there is a problem with the television If a TV program does have the audio the problem may be the BD player the cables being used or the TV itself Does the problem occ...

Page 30: ...e a lens cleaner at any electronics retailer Problem occur when watching TV program NO YES Distorted audio from a TV program on a different channel or input means there is a problem with the television If a TV program does have the audio the problem may be the BD player the cables being used or the TV itself Does the problem occur when DVD is connected to another TV NO YES Audio is fine when the B...

Page 31: ...ied multiple tapes and discs NO YES YES If the issue only shows up on one disc then the problem is with that disc Have the customer try multiple tapes or discs If the issue happens on multiple discs and tapes then ask the customer to try a lens or a head cleaner Has the customer connected to another TV NO Ask the customer to connect the product to another TV If the issue persists try another set o...

Page 32: ...ged into a surge protector NO YES Make sure the surge protector is plugged into a wall outlet Also make sure the surge protector is turned on or does not need to be reset due to a recent surge Does the unit work when plugged into another outlet NO YES Test the unit in another outlet If the unit works then the problem is the outlet where the unit was connected If the issue is the BD then set up ser...

Page 33: ...the customer initialized a DVD RW in VR mode make sure the owners manual has the RW logo to show compatibility for the VR format Did the customer burn the disc in a computer NO YES Make sure the customer burned a compatible format such as VCD SVCD or DivX Make sure the file meets the specifications required for the player to play the disc Check the owners manual for specifications Disc may still n...

Page 34: ...hen reset the unit by unplugging it for 15 to 30 seconds If the unit does not respond after the reset arrange for service on the BD Does the open close button on the unit work NO YES Press the open close button on the unit If the disc ejects troubleshoot the remote using the Remote Control not working call flow Has the customer reset the unit NO Ask the customer to reset the unit by unplugging the...

Page 35: ...teries are new and fresh The batteries do not need to come from a spare battery drawer Do not mix used and new batteries Is the remote working at all NO YES YES If the remote does not work anything then walk the customer through a remote drain Remove the batteries from the remote control Then press and hold any button down for a minute This will drain the power out of the remote and reset it Unive...

Page 36: ...tomer initialized a DVD RW in VR mode make sure the owners manual has the RW logo to show compatibility for the VR format Did the customer burn the disc in a computer NO YES Make sure the customer burned a compatible format such as VCD SVCD or DivX Make sure the file meets the specifications required for the player to play the disc Check the owners manual for specifications Disc may still not be c...

Page 37: ...er initialized a DVD RW in VR mode make sure the owners manual has the RW logo to show compatibility for the VR format Did the customer burn the disc in a computer NO YES Make sure the customer burned a compatible format such as VCD SVCD or DivX Make sure the file meets the specifications required for the player to play the disc Check the owners manual for specifications Disc may still not be comp...

Page 38: ...ion code of the DVD disc is not 1 then the DVD disc will not play on a player sold in the US The player can play only DVD discs labeled same as the rear of the unit Is the disc locking up on a disclaimer screen when the customer presses play NO The disc locking up on a feature needs to be reported to Q E See instructions on reporting problems to Q E For a work around the problem advise the custome...

Page 39: ...e sure the BD player aspect ratio is set to the appropriate setting depending on the aspect ratio of the TV If the customer chose 4 3 Letterbox then bars will appear on the top and bottom The customer can choose the panscan setting to get rid of the bars What is the resolution of the BD player set at NO YES Try changing the resolution to 576p 720p 1080i 1080p resolution require a widescreen aspect...

Page 40: ... issue Copy protected discs will not be up converted when HDCP is not found on the input or output Is the customer using an HDMI or DVI cable NO YES Regular discs can be converted to 1080p just through the HDMI output The TV must have HDCP compliancy on the HDMI input The display has to accept the resolution 576p 720p 1080i 1080p Is the customer using an HDMI to DVI cable NO YES Some movie compani...

Page 41: ... When a customer switches from one disc to another the lens have to be changed what causes the delay BLU RAY require different lasers to read the discs Why does it take so long to boot my BD NO The booting times for the BD is under 15 seconds When the set is booted it takes a little long time to loading the OS program 6 2 Booting Times ...

Page 42: ...ridge diode 1 1 1 Solution Replace F901 BD901 on SMPS board 1 1 2 How to troubleshoot Countermeasure 1 Look at the physical of fuse F901 2 Check the bridge diode BD901 1 1 3 Service hint Any picture Remark SMPS board top view Fuse F901 Can look at physical condition BD901 BD901 BD901 BD901 F901 F901 F901 F901 ...

Page 43: ...abnormal Check D950 D951 ZD951 ZD952 FR950 and replace it Case 2 5 5 VA abnormal Check D952 D953 and replace it Case 3 14 VA abnormal Check D955 D956 and replace it Case 4 All voltage abnormal Check IC901 and replace it 1 2 3 Service hint Any picture Remark SMPS board top view SMPS board bottom view Case 1 Case 1 Case 1 Case 1 Case 2 Case 2 Case 2 Case 2 Case 3 Case 3 Case 3 Case 3 Case 4 Case 4 C...

Page 44: ...y led no working 2 1 IC155 No 3 3 VA 2 1 1 Solution Replace IC155 on MAIN board 2 1 2 How to troubleshoot Countermeasure 1 Please check 3 3 VA of IC101 2 If 3 3 VA is abnormal please check 5 5 VA of IC155 pin1 3 If 5 5 VA is OK but 3 3 VA is abnormal replace IC155 2 1 3 Service hint Any picture Remark MAIN board bottom view MAIN board bottom view IC101 IC101 IC155 IC155 ...

Page 45: ...em 3 3 V No System 3 3 V 2 2 1 Solution Replace IC156 on MAIN board 2 2 2 How to troubleshoot Countermeasure 1 Please check 5 5 VA of IC156 pin3 VIN 2 If 5 5 VA is abnormal please check SMPS 5 5 VA 3 If 5 5 VA is OK but 3 3 V is abnormal at the IC156 pin6 VOUT replace IC156 2 2 3 Service hint Any picture Remark MAIN board top view IC156 IC156 ...

Page 46: ...n9 VCC 5 5 VA If there is no 5 5 V please check 5 5 VA from SMPS 3 If 5 5 VA input is normal first of all check DC15_12_CTRL is high IC101 pin24 If DC15_12_CTRL is high check R159 and if there s no defective component then please replace IC151 4 After changing it if the set is still not booting Check 1 2 V 1 5 V 3 3 V is normal please refer to other sections of this guide Check Crystal X501 refer ...

Page 47: ...o troubleshoot Countermeasure 1 Please check the soldering status of 27 MHz crystal X501 2 Please check the frequency of 27 MHz crystal X501 3 If the crystal doesn t oscillate replace X501 4 After changing it if the set is still not booting Check NAND Flash IC IC503 refer to item 2 5 Check DDR IC IC502 refer to item 2 6 Check MT8563 IC IC501 refer to item 2 7 2 4 3 Service hint Any picture Remark ...

Page 48: ... How to troubleshoot Countermeasure 1 Please check physical status of IC503 on your eyes 2 Check the VCC 3 3 V of IC503 and if it s normal please replace IC503 Please make sure IC503 has proper program 3 After changing it if the set is still not booting Check DDR IC IC502 refer to item 2 6 Check MT8563 IC IC501 refer to item 2 7 2 5 3 Service hint Any picture Remark MAIN board bottom view IC503 IC...

Page 49: ...oard 2 6 2 How to troubleshoot Countermeasure 1 Please check 0 75 V of DDR3_VREF between C5C2 and R5C3 Please check 1 5 V of IC502 2 If it doesn t work even though IC151 IC156 are no problem IC502 DDR memory could have problem 3 After changing it if the set is still not booting Check MT8563 IC IC501 refer to item 2 7 2 6 3 Service hint Any picture Remark MAIN board top view IC502 IC502 ...

Page 50: ...d 2 7 2 How to troubleshoot Countermeasure 1 Please Check 1 2 V of C551 on MAIN board Please Check 3 3 V of C536 on MAIN board Please Check 1 5 V of C554 on MAIN board 2 If it doesn t work even though IC151 IC156 are no problem IC501 MT8563 could have problem 2 7 3 Service hint Any picture Remark MAIN board bottom view C536 3 3 V C536 3 3 V C551 1 2 V C551 1 2 V C554 1 5 V C554 1 5 V ...

Page 51: ...w to troubleshoot Countermeasure 1 Check you internet connection Make sure it connect properly to modem or router 2 If internet connection OK please check the Ethernet Jack JK251 3 If there is soldering problem please re soldering pin JK251 4 If after re soldering problem still occurs replace JK251 5 If problem still occurs after change JK251 check MT8563 IC IC501 Refer to item 2 7 3 1 3 Service h...

Page 52: ...But component output is OK 4 1 JK252 HDMI JACK 4 1 1 Solution Replace JK252 HDMI Jack 4 1 2 How to troubleshoot Countermeasure 1 Check JK252 pin soldering 2 If there is short soldering on pin JK252 re soldering pin JK252 3 If problem still occurs check HDMI data If all data OK replace JK252 If data NG check set on BD mode Replace IC501 4 1 3 Service hint Any picture Remark HDMI OUT HDMI OUT ...

Page 53: ... Countermeasure 1 Check IC601 pin soldering 2 If there is short soldering on pin IC601 re soldering pin IC601 3 If problem still occurs check AMP IC IC700 IC701 IC702 Check IC700 IC701 IC702 pin soldering If soldering ok check the AMP heat sink Replace IC700 IC701 IC702 5 1 3 Service hint Any picture Remark AMP heat sink view MAIN board top view IC601 PWM IC IC601 PWM IC AMP IC AMP IC ...

Page 54: ...board Check CN202 connector 2 If there is short soldering on CN104 re soldering CN104 If there is short soldering on CN202 re soldering CN202 3 If problem still occurs check 5 V CN104 pin11 pin15 If no output check MAIN board IC154 If OK check D D signal If there is no signal replace IC501 6 1 3 Service hint Any picture Remark MAIN board top view USB PORTABLE MIC board top view USB PORTABLE board ...

Page 55: ...ssis 7 1 2 How to troubleshoot Countermeasure 1 Check your BT device Make sure that BT function is on state 2 If it is OK please check the CN252 3 If there is soldering problem please re soldering pin CN252 4 If after re soldering problem still occurs replace BT module 5 If problem still occurs after change BT module check MT8563 IC IC501 Refer to item 2 7 7 1 3 Service hint Any picture Remark MAI...

Page 56: ...same fuse YES YES NO Is TH901 normal Is the VCC 11 V 25 V supplied to IC901 pin7 Is BD901 normal Is D952 D953 normal Replace TH901 Check or replace Replace BD901 Replace D952 D953 YES YES YES YES NO NO NO NO 1 SYSTEM POWER SUPPLY ON SMPS BOARD Power line of MAIN board is short ...

Page 57: ...ES NO Is TH901 normal Is the VCC 11 V 25 V supplied to IC901 pin7 Is BD901 normal Is D955 D956 normal Replace TH901 Check or replace Replace BD901 Replace D955 D956 YES YES YES YES NO NO NO NO ELECTRICAL TROUBLESHOOTING GUIDE Power line of MAIN board is short ...

Page 58: ...ormal Check MICOM IC on MAIN board YES YES NO Is the VCC 11 V 25 V supplied to IC902 pin4 Is Q951 normal Is IC902 normal Is D981 normal Is Q902 normal Replace Q951 Replace IC902 Replace D981 Check or replace Q902 YES YES YES YES NO NO NO NO Power line of MAIN board is short ...

Page 59: ...IC155 pin3 Check 5 5 VA on SMPS board YES YES NO Check IC155 and replace No 3 3 V Is the VCC supplied to IC156 pin3 Check 5 5 VA on SMPS board YES YES NO Is there signal at IC156 pin2 Check IC101 pin25 DCDC33_CTRL Check IC156 and replace YES NO 2 POWER SUPPLY ON MAIN BOARD ...

Page 60: ...supplied to IC302 pin2 Check 12V_Loader IC150 on MAIN board YES YES NO Check IC302 and replace No 12 V Is the VCC supplied to IC150 pin2 Check 14 VA on SMPS board YES YES NO Is the VCC supplied to IC150 pin1 Check IC101 pin57 LDO_CTRL Check IC150 and replace YES NO ...

Page 61: ...to IC153 pin3 Is the VCC supplied to IC154 pin3 Check 5 5 VA on SMPS board Check 5 5 VA on SMPS board YES YES YES YES NO NO Is there signal at IC153 pin1 Is there signal at IC154 pin1 Check IC101 pin57 LDO_CTRL Check IC101 pin57 LDO_CTRL Check IC153 and replace Check IC154 and replace YES YES NO NO ...

Page 62: ...to IC152 pin1 Check 5 5 VA on SMPS board YES YES NO Check IC152 and replace No 1 5 V 1 2 V Is the VCC supplied to IC151 pin9 or pin22 Check 5 5 VA on SMPS board YES YES NO Is there signal at IC151 pin2 or pin3 Check IC101 pin24 DC15_12_CTRL Check IC151 and replace YES NO ...

Page 63: ...nt Board Check IC155 and 5 5 VA on SMPS board Replace X501 Stand by LED OK 5 5 VA 3 3 VA OK X501 27 000 MHz OK NO NO NO YES Check IC101 IC151 IC156 and SMPS board Check CN305 pin11 3 3 VA OK IC101 3 3 VA IC151 1 5 V 1 2 V IC156 3 3 V OK NO NO YES YES YES 3A Replace IC501 MT8563 3B ...

Page 64: ...able connect LG Logo display on monitor OK LG Logo display on monitor OK 3A IC101 3 3 VA IC151 1 5 V 1 2 V IC156 3 3 V OK Display cable connection OK NO NO NO NO YES YES YES YES YES Replace X501 Replace IC503 NAND FLASH Replace IC501 MT8563 or IC151 IC156 X501 27 000 MHz OK IC503 NF_ALE NF_CLE OK NO NO YES ...

Page 65: ...H_5VA OK Check H_5VA IC152 YES YES YES YES NO IC101 HDMI_SCL SDA EDID_SW CEC_RX TX HDMI_RST OK JK252 pin19 HPD about 3 3 V OK Is there signal on pin1 3 4 6 7 9 10 12 Check IC101 Check hot plug detect signal from TV Check IC501 MT8563 VCC or replace IC501 MT8563 HDMI output OK YES NO NO NO ...

Page 66: ...6 pin3 supply 5 5 VA and pin2 YES YES YES YES NO X602 24 576 MHz OK IC700 IC701 IC702 36 V 12 V OK IC601 pin19 20 21 22 23 I2C data OK IC700 IC701 IC702 pin4 16 18 OK Replace X602 Check SMPS 36 V and IC150 12 V Check IC501 B10 D7 C7 D8 C8 pin Check IC101 Replace IC700 IC701 IC702 YES YES NO NO NO NO ...

Page 67: ...2 52 WAVEFORMS 1 SYSTEM PART 1 MPEG CRYSTAL 27 MHz IC501 MT8563 X TAL 27 MHz 1 1 ...

Page 68: ...2 53 2 SYSTEM PART 2 DDR3 MEMORY IC501 MT8563 BA0 IC501 MT8563 WE IC501 MT8563 CAS IC501 MT8563 CK 4 3 2 5 2 3 4 5 ...

Page 69: ...2 54 3 AUDIO PART 1 ADC I2C IC202 SCL IC202 SDA 7 6 6 7 ...

Page 70: ...2 55 4 AUDIO PART 2 PWM I2S I2C 9 8 10 M_LRCK 8 M_BCK M_DATA0 10 9 M_DATA0 M_BCK ...

Page 71: ...2 56 5 HDMI PART H_SDA H_SCL 11 12 12 11 ...

Page 72: ...CABLE MAIN WIRELESS CN252 BT 12P HARNESS CABLE MAIN SMPS 12P FFC CABLE MAIN BT Wireless CN251 CN150 CN103 18P FFC CABLE MAIN FRONT CN303 CN301 CN302 Wireless Option 45P FFC CABLE MAIN MD 8P FFC CABLE MAIN MD 5P FFC CABLE MAIN MD CN104 CN202 18P FFC CABLE MAIN JACK WIRING DIAGRAM ...

Page 73: ... TX Module To Front VFD MC3401 STB CLK DO Ethernet TX_P N RX_P N PWM_RST CLK DAT Wireless Interface UART_RX TX TMDS_TX DDR3 X1 512 MB 4 Gbit M_MCLK Sampling rate Max 96 KHz input 48 KHz mp3 fix SMSC syncomm bypass Data 0 FL FR Data 1 RL RR Data 2 C SW W3 2 Data 1 Analog L R Optical MIC_DATA ADC_DATA HDMI OUT ARC 14 ARC_SPDIF UART_TX BT_RST BT 3 3VA M_SCLK M_LRCK M_MCLK OPT_SPDIF M_LRCK M_SCLK CS53...

Page 74: ...D955 D956 are Defective SMPS EAX65239501 Rev1 6 14 2014 12 19 CIRCUIT DIAGRAMS 1 SMPS CIRCUIT DIAGRAM WHEN SERVICING THIS CHASSIS UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENT...

Page 75: ...2 64 2 63 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 MICOM EAX66489201 Rev1 0 0 MAIN AMP 2 2015 01 22 2 MAIN AMP MICOM CIRCUIT DIAGRAM ...

Page 76: ...2 66 2 65 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 POWER EAX66489201 Rev1 0 0 MAIN AMP 3 2015 01 22 3 MAIN AMP POWER CIRCUIT DIAGRAM ...

Page 77: ...2 68 2 67 1 4 3 2 5 WAVEFORM NUMBER 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 MPEG EAX66489201 Rev1 0 0 MAIN AMP 4 2015 01 22 4 MAIN AMP MPEG CIRCUIT DIAGRAM ...

Page 78: ...2 70 2 69 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 MEMORY EAX66489201 Rev1 0 0 MAIN AMP 5 2015 01 22 5 MAIN AMP MEMORY CIRCUIT DIAGRAM ...

Page 79: ...2 72 2 71 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 F E EAX66489201 Rev1 0 0 MAIN AMP 6 2015 01 22 6 MAIN AMP F E CIRCUIT DIAGRAM ...

Page 80: ...2 74 2 73 7 6 WAVEFORM NUMBER 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 ADC MIC EAX66489201 Rev1 0 0 MAIN AMP 7 2015 01 22 7 MAIN AMP ADC MIC CIRCUIT DIAGRAM ...

Page 81: ...2 76 2 75 12 11 WAVEFORM NUMBER 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 I O EAX66489201 Rev1 0 0 MAIN AMP 8 2015 01 22 8 MAIN AMP I O CIRCUIT DIAGRAM ...

Page 82: ...2 78 2 77 9 8 10 WAVEFORM NUMBER 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 PWM EAX66489201 Rev1 0 0 MAIN AMP 9 2015 01 22 9 MAIN AMP PWM CIRCUIT DIAGRAM ...

Page 83: ...2 80 2 79 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 AMP EAX66489201 Rev1 0 0 MAIN AMP 10 2015 01 22 10 MAIN AMP AMP CIRCUIT DIAGRAM ...

Page 84: ...2 82 2 81 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 JACK USB PORT MIC EAX66186801 Rev1 0 0 2014 12 22 11 JACK CIRCUIT DIAGRAM OPTIONAL PART 11 1 USB PORTABLE MIC CIRCUIT DIAGRAM ...

Page 85: ...2 84 2 83 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 JACK W O MIC EAX65038701 Rev1 5 7 2014 12 22 JACK CIRCUIT DIAGRAM OPTIONAL PART 11 2 USB PORTABLE CIRCUIT DIAGRAM ...

Page 86: ...2 86 2 85 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 FRONT EAX66228301 Rev1 0 0 2014 12 22 12 FRONT CIRCUIT DIAGRAM ...

Page 87: ...n Description Spec V Power On Mode IC501 MT8563 DVCC33_IO 3 3 3 35 DVCC12_K 1 2 1 199 DDRVCCIO 1 5 1 497 AVDD33 3 3 3 35 AVDD12 1 2 1 199 AVDD12_LDO 1 2 1 199 IC503 H27U2G8F2DTR 12 VCC 3 3 3 35 36 VCC 3 3 3 35 IC601 PS9860 17 VDD_IO 3 3 3 35 43 VDD_IO 3 3 3 35 52 VDD_IO 3 3 3 35 IC700 701 702 TAS5612 2 VDD 12 12 03 22 VDD 12 12 03 29 PVDD 36 26 36 65 26 09 30 PVDD 36 26 36 65 26 09 31 PVDD 36 26 3...

Page 88: ...2 90 2 89 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD TOP VIEW BOTTOM VIEW NOTE Warning Parts that are critical with respect to risk of fire or electrical shock ...

Page 89: ...2 92 2 91 2 MAIN AMP P C BOARD TOP VIEW BOTTOM VIEW ...

Page 90: ...3 1 USB PORTABLE MIC P C BOARD 3 2 USB PORTABLE P C BOARD 2 94 2 93 3 JACK P C BOARD OPTIONAL PART TOP VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW ...

Page 91: ...2 96 2 95 4 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...

Page 92: ... 1 SECTION 3 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 3 3 1 CABINET AND MAIN FRAME SECTION 3 3 2 DECK MECHANISM SECTION 3 5 3 PACKING ACCESSORY SECTION 3 7 4 SPEAKER SECTION 3 8 4 1 FRONT SPEAKER 3 8 ...

Page 93: ...3 2 ...

Page 94: ... CABLE3 A43 281 462 282 A A42 CABLE1 462 JACK 462 462 MAIN A46 I A C H G B D E 465 J 300 OPTIONAL PART 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 ...

Page 95: ...1026 1439 A001 1002 1005 1001 1030 1016 1013 1015 1020 1003 1018 1019 1011 1012 1035 1050 A006 1004 1043 A005 1439 1045 1049 1437 1025 1025 1024 1024 1437 2 DECK MECHANISM SECTION ...

Page 96: ...3 PACKING ACCESSORY SECTION 804 Bag 803 Packing 802 Box Master 803 Packing 900 Remote control 832 DLNA Bundle S W 801 Owner s manual 808 Battery 825 FM antenna ...

Page 97: ...4 SPEAKER SECTION 4 1 FRONT SPEAKER A800 ...

Page 98: ...REQUIRED SA RESET 4 3 3 SA RESET PROCEDURE 4 3 MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION 4 5 1 IC501 MT8563 PIN DESCRIPTION 4 5 2 IC701 TPIC2050 9CH MOTOR DRIVE WITH 3 BEAM LASER DIODE DRIVER 4 8 3 PICK UP CONNECTOR TERMINAL PIN ASSIGNMENTS 4 10 BLOCK DIAGRAM 4 11 SECTION 4 MT8563 F E LOADER PART CONTENTS ...

Page 99: ...K PROCEDURE 1 Power on the set then mode is in home menu 2 Press Settings 3 Under DISPLAY highlighted condition press 5 1 7 7 7 7 7 Enter on the remote controller to display special mode Move to the 1 Laser Check and click 4 Check result is shown automatically If you will see PASS BD DVD CD LD status is OK LD CHECK GUIDE ...

Page 100: ... 7 7 7 7 7 Enter on the remote controller to display special mode Move to 3 SA IOP Reset and click 1 PURPOSE In order to insert the new SA adjustment values it needs clearing SA initial values of the flash memory 2 REQUIRED SA RESET After changing traverse After changing main board assembly After changing main board flash IC 3 SA RESET PROCEDURE ...

Page 101: ...L disc Tray is opened automatically 5 If the disc is inserted you will see Wait 6 If SA Adjustment is finished you will see PASS and tray is opened automatically 7 Press stop key twice to escape this special mode Reference ...

Page 102: ...V Motor Hall sensor input The pin is spike free at power on stage N2 FEFMO Analog Output Feed motor 1 control DAC output N3 FEFMO2 Analog Output Feed motor 2 control DAC output L5 FEFMO3 Analog I O Feed motor 3 control DAC output Alternative Function Auxiliary servo input L4 FEFMO4 Analog I O Feed motor 4 control DAC output Alternative Function Auxiliary servo input H3 FOO Analog Output Focus serv...

Page 103: ...function 1 LCD serial interface command enable 2 LCD_DRV Sqare wave output for LCD control 3 Internal monitored signal output 4 Line in input left right clock 5 General IO J1 FEGIO5 Analog Output Read gain switch 6 Alternate function 1 SIDM 2 LCD serial interface command enable 3 Internal monitored signal output 4 Line in input data 5 General IO K7 FEGIO6 Analog Output Read gain switch 6 The pin i...

Page 104: ...ntial Input of AC Coupling RF SUM Signal Negative G2 RFIP Analog Input Differential Input of AC Coupling RF SUM Signal Positive G3 TLO Analog Output Tilt servo output M1 FETRAYIN_ 3 3V LVTTL I O 5V tolerance 6 mA 75K pull up 3 3 V Tray_is_in Input A Logical Low Indicates the Tray is IN Feed back Flag is from Tray Connector The pin is spike free at power on stage Alternate function General IO L3 FE...

Page 105: ...D END detection STEP END detection DAC PWM DAC PWM DAC PWM DAC PWM DAC PWM DAC PWM DAC PWM P5V P5V P12V int 3 3V Regulator A5V P5V int 10V Regulator Analog 5V DAC P12V SLD ENA TLT ENA DIFF TLT TEMPMON_ENA TRK ENA STP ENA SPM ENA power monitor SIOV 200k 200k SIOV 33k 19V LOAD ENA F B F B F B F B F B SLD ENA TPIC2050 On chip thermometer pre driver power FET pre driver power FET pre driver power FET ...

Page 106: ...al 27 ILDD_CD OUT Laser diode for CD output terminal 28 CP5V MISC The capacitance connection terminal for control system power supply 0 1uF or lager decoupling capacitor should be connected 29 LOAD_P OUT Load positive output terminal 30 LOAD_N OUT Load negative output terminal 31 P5V12L PS The power supply terminal 5V or 12V for Load driver output stages 32 TEST2 MISC Test pin Should be open 33 TE...

Page 107: ...b PD Mode Change 23 RF BD DVD CD RF 24 RF BD DVD CD RF 25 NC NC 26 SW1 Mode BD DVD CD Mode Change 27 VREF_PD 2 1V PDIC Reference 2 1V 28 VCC_PD 5V PDIC Power 5V 29 GND_PD PDIC GND 30 SW Gain BD DVD CD Gain Change 31 GND_LD LD Ground LD Monitor Part 32 BD_LD LD Control BD 33 CD_LD LD Control CD 34 DVD_LD LD Control DVD 35 GND_LD LD Ground 36 TEMP Thermistor 37 NC NC 38 CD DVD_MPD Monitor output DVD...

Page 108: ...4 11 BLOCK DIAGRAM OPU Ethernet 5 1 CH 2 CH S PDIF HDMI CVBS Motor Driver USB NAND 2 Gb DDR3 512 MB Audio DAC MT8563 HD SD Decode 800 MHz Cortex A7 400 MHz Audio DSP x 3 HDMI 1 4 Ethernet Monitor ...

Page 109: ...4 12 ...

Search results

Summary of Contents for LHB675

Reviews:

Related manuals for LHB675

Brands by name

Popular brands

LG LHB675, Service Manual

Search results

Summary of Contents for LHB675

Reviews:

Related manuals for LHB675

Brands by name

Popular brands