LG UBK80 Service Manual Download

Page: 52 / 89

3-35

Only for training and service purposes.

< MAIN board top view >

DGND

C244

1uF(1)

R249

L215

DGND

R232

13K(1%)

C254
10uF
/16V

DGND

C234
10pF

C260
10uF
/16V

R235

100K

1.5V_DDR

C266

10uF

/16V

DGND

R236

10K(1%)

12VA

DGND

R241

1.5K (1%)

R243

4.7K

C249

100nF

C253
10uF
/16V

C259
10uF
/16V

C240

1nF _NC

R258

0OHM

PWR_CTL4

C2B7

100nF

L211

4.7UH

VOUT = 0.798x((10K+1.5K)/13K+1)= 1.5V





IC206

ONE POINT REPAIR GUIDE

NO BOOTING WHEN YOU TURN THE UNIT ON, NO GREEN LED ON
FRONT PANEL

When you turn on your set, Green LED doesn’t work, it will not boot-up.

2-6. IC206 System 1.5 V_DDR (No 1.5 V)

2-6-1. Solution

Replace MAIN board.

2-6-2. How to troubleshoot (Countermeasure)

1) Please check 12 VA of IC206 pin1 (VIN).
2) If 12 VA is abnormal, please check SMPS.
3) If 12 VA is OK, but 1.5 V is abnormal pin2 of IC206(VOUT), replace MAIN board.

2-6-3. Service hint (Any picture / Remark)

Summary of Contents for UBK80

Page 1: ...HDBlu rayDisc Player Any reproduction duplication distribution including by way of email facsimile or other electronic means publication modification copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual The material covered by this prohibition includes withou...

Page 2: ...ght 2020 LG Electronics Inc All rights reserved Only for training and service purposes CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 MECHANISM SECTION 5 F E LOADER PART ...

Page 3: ...ice purposes SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR BLU RAY DISC DVD PLAYER PRODUCTS 1 3 SERVICING PRECAUTIONS 1 4 GENERAL SERVICING PRECAUTIONS INSULATION CHECKING PRODEDURE ELECTROSTATICALLY SENSITIVE ES DEVICES FIRMWARE UPDATE GUIDE 1 5 SPECIFICATIONS 1 7 ...

Page 4: ...ginal design Be sure that the safety purpose of the polarized line plug has not been defeated 3 Soldering must be inspected to discover possible cold solder joints solder splashes or sharp solder points Be certain to remove all loose foreign particles 4 Check for physical evidence of damage or deterioration to parts and components for frayed leads or damaged insulation including the AC cord and re...

Page 5: ...rts Note 1 should be more than 1Mohm Note 1 Accessible Conductive Parts include Metal 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 effec...

Page 6: ...ce purposes FIRMWARE UPDATE GUIDE 1 UPDATE 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 Firmware Update OSD OSD contents wkh l SJWFS 7FSTJPO 48 7FSTJPO OFX VQEBUF XBT GPVOE P ZPV XBOU UP VQEBUF 48 7FSTJPO 0 BODFM ...

Page 7: ...rights reserved Only for training and service purposes 2 DURING UPDATING 1 Progressive bar is shown on the update time repeatedly 2 Tray is opened 3 AFTER UPDATE COMPLETE 1 Power off on automatically after update complete 2 Tray will be closed ...

Page 8: ...SPECIFICATIONS Power requirements Refer to main label Power consumption Refer to main label Networked standby 0 5 W If all network ports are activated Dimensions W x H x D Approx 430 mm x 45 5 mm x 205 mm Bus Power Supply USB 5 V 500 mA Design and specifications are subject to change without notice ...

Page 10: ...tronics Inc All rights reserved Only for training and service purposes SECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 2 1 CABINET AND MAIN FRAME SECTION 2 2 2 DECK MECHANISM SECTION 2 4 3 PACKING ACCESSORY SECTION 2 6 ...

Page 11: ... SMPS BOARD LED BOARD E G G H F 283 A46 A47 A53 264 266 300 261 262 261 260 284 CABLE2 250 A44 A45 267 251 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 12: ...OLD 260 Chassis 261 MDP63026803 Foot EXTRUSION SILICON BD Player UP 262 MCK67389501 Cover MOLD HIPS 60HR DVD BP325 BP1 264 MEG65020901 Holder MOLD ABS BD Player UP970 MOLD 266 MCQ62096408 Damper CUTTING THERMOPLASTIC DVD BD57 267 ABA30039201 Bracket Assembly BD Player UBK80 90 Bracket Ass 283 MCV63873901 Door MOLD ABS BD Player UP970 MOLD 284 MHY63124701 Spring EXTRUSION SWC COIL RH735 Torsi w 300...

Page 13: ...ing and service purposes 1026 1030 1016 1013 1015 1020 1011 1012 1035 A006 1043 A005 1439 1045 1018 1019 1028 1028 1051 1439 1052 1050 1027 1029 1029 1028 1060 1060 1005 1001 1003 1004 A100 A101 A102 1439 1002 1439 1049 1437 1025 1025 1024 1437 1053 2 DECK MECHANISM SECTION ...

Page 14: ...ding PCB Assy UHD BD A006 EAU62123301 Motor Assembly DC Recorder BM10 loading HZ 1011 MAM64504201 Base MOLD ABS HF380 up970 MOLD Base 1012 MEA62870901 Guide MOLD HIPS 60HR DECK MECHA BM14 1013 MDT62367501 Gear MOLD POM DECK MECHA BM14 MOLD 1015 4400R 0010A Belt DVD DP 9 OTHER LOADING 1016 MDT62367401 Gear MOLD POM DECK MECHA BM14 MOLD 1018 EAU62065801 Motor DC JQ24 35H390L_Wire 80mm_Loading OR 101...

Page 16: ... LG Electronics Inc All rights reserved Only for training and service purposes Packing accessory parts list S AL LOCA NO PART NO DESCRIPTION SPECIFICATION REMARKS 900 Remote Controller Assembly AKB75135401 U3 1 BP350 FCC ...

Page 18: ... WHEN YOU TURN THE UNIT ON NO GREEN LED ON FRONT PANEL 3 30 3 NO HDMI VIDEO AUDIO OUTPUT 3 38 4 NO SOUND 3 39 5 NETWORK CONNECTION ERROR 3 40 6 NO DETECTION 3 41 ELECTRICAL TROUBLESHOOTING GUIDE 3 42 1 POWER SUPPLY ON SMPS BOARD 3 42 2 POWER SUPPLY ON MAIN BOARD 3 44 WAVEFORMS OF MAJOR CHECK POINT 3 50 1 SYSTEM PART 1 3 50 2 SYSTEM PART 2 SYSTEM MEMORY 3 51 3 AUDIO PART S PDIF 3 52 4 HDMI PART 3 5...

Page 19: ...isc displaying the issue is a problem with the 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 co...

Page 20: ...tomer use a lens cleaner on the BD A lens cleaner 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...

Page 21: ...tomer use a lens cleaner on the BD A lens cleaner 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 connect...

Page 22: ...stomer use a lens cleaner on the BD A lens cleaner 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 connect...

Page 23: ... use a lens cleaner on the BD A lens cleaner is 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 con...

Page 24: ... set to the correct input NO YES Make sure the 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 differ...

Page 25: ...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 program then ...

Page 26: ...ut 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 program then he still may ha...

Page 27: ...rect 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 program then he stil...

Page 28: ...s the customer tried the device on another display Is the customer using an analog cable connection NO NO YES YES Ask the customer to connect the device to another display If the device starts working then the problem may be the original display The customer will need to troubleshoot the display If the device still does not work then the problem may be the device or the cable Customer s using an D...

Page 29: ...are compatible with the BD by checking playable 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 ...

Page 30: ...blem indicates a problem with the BD player Is 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 an...

Page 31: ... problem with the disc Problem occurring on multiple 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 be...

Page 32: ...ens cleaner is needed The customer can purchase 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...

Page 33: ...e for service instructions Has the customer tried 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 anot...

Page 34: ... Control Not Working call flow Is the unit plugged 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 c...

Page 35: ... is using is compatible with the BD player If 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 own...

Page 36: ...NO If the unit does no respond to any buttons then 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 t...

Page 37: ... customer to change batteries Make sure the batteries 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...

Page 38: ...ng is compatible with the BD player If 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 man...

Page 39: ... is compatible with the BD player If 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 manua...

Page 40: ... region code of the DVD disc NO YES If the region 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 Fo...

Page 41: ...t ratio of the BD player set at NO YES Make 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 480i p 720i p 1080...

Page 42: ...an error message about HDCP this is the 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 480i p 720i p 1080i or 1080p Is the customer using ...

Page 43: ... s Why does it take so long to load my BD s NO 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 44: ... 2 How to troubleshoot Countermeasure 1 Look at the physical of fuse F102 2 Check the bridge diode D101 3 Check the TH101 short or open 1 1 3 Service hint Any picture Remark TH101 D101 F102 T1 6AL 250V 1 6A 250V CN101 1 NUTRAL WH BL 2 LIVE BK BN V101 F102 F 1 0 1 R103 470K 3216 F 1 0 3 R102 470K 3216 R101 470K 3216 FL101 28mH 22x22x19 TH101 C104 470pF 250VAC DGND DGND C102 100nF 275VAC C101 470pF ...

Page 45: ...11 47K ZD101 R 1 2 1 1 0 0 R 1 1 4 1 0 C107 680pF R104 0OHM CE102 47uF 50V 105c D104 D102 Q101 Z D 1 0 2 SE101 3 4 R 1 1 3 4 7 R112 47K R105 47K R106 47K C111 R110 47K C106 1nF R119 100 FL102 R 1 2 3 1 0 0 IC101 1 FB OLP 2 BA 4 ST 5 DRV 6 OCP 7 VCC 8 GND R118 330 R107 47K C105 _NC R108 47K R109 47K R120 1K _NC L101 R115 _NC R116 10K R117 0 47 2W C121 100P 1KV C108 102PF 3 4 5 Minimum Start Voltage...

Page 46: ...5 on SMPS board 1 3 2 How to troubleshoot Countermeasure 1 Check D105 and replace it 2 Check CE104 CE105 and replace it 1 3 3 Service hint Any picture Remark D105 CE104 CE105 CE105 1000uF 16V 105c _NC DGND C123 10nF C124 100nF CE104 1000uF 16V 105c 20x14 18 3 U102 C120 470pF _NC D105 1 2 3 T101 6 7 9 10 Secondary N5 8T TIW M U 0 32x2 N4 8T TIW M U 0 32x2 100nF 0 1u 0CH1104K566 10nF 0 01uF 0CH1103K...

Page 47: ...f IC201 pin1 VIN 2 If 12 VA is abnormal please check SMPS 3 If 12 VA is OK but 5 1 VA is abnormal pin2 of IC201 VOUT replace MAIN board 2 1 3 Service hint Any picture Remark MAIN board top view 12VA TO 5 1VA L209 UBW2012 121F 12VA_Motor DGND DGND DGND R205 100K L205 DGND R201 13K 1 R206 62K 1 DGND C201 10pF C206 1uF 1 R213 8 2K 1 R224 33 12VA DGND C228 10uF 16V C221 10uF 16V C214 10uF 16V 5 1VA C2...

Page 48: ... 100nF L202 4 7UH 2 0 2 C I 1 N I V 2 W S 3 D N G 4 T S B 5 N E 6 B F VOUT 0 798x 39K 3 3K 13K 1 3 394V IC202 IC202 ONE POINT REPAIR GUIDE NO BOOTING WHEN YOU TURN THE UNIT ON NO GREEN LED ON FRONT PANEL When you turn on your set Green LED doesn t work it will not boot up 2 2 IC202 System 3 3 VA_Micom No 3 3 VA 2 2 1 Solution Replace MAIN board 2 2 2 How to troubleshoot Countermeasure 1 Please che...

Page 49: ...100nF DGND R2P1 4 7K L203 4 7UH 3 0 2 C I 1 N I V 2 W S 3 D N G 4 T S B 5 N E 6 B F VOUT 0 798x 15K 1 5K 13K 1 1 8V IC203 IC203 ONE POINT REPAIR GUIDE NO BOOTING WHEN YOU TURN THE UNIT ON NO GREEN LED ON FRONT PANEL When you turn on your set Green LED doesn t work it will not boot up 2 3 IC203 System 1 8 V No 1 8 V 2 3 1 Solution Replace MAIN board 2 3 2 How to troubleshoot Countermeasure 1 Please...

Page 50: ...2B3 100nF L204 4 7UH 4 0 2 C I 1 N I V 2 W S 3 D N G 4 T S B 5 N E 6 B F TP201 VOUT 0 798x 15K 1 5K 13K 1 1 8V IC204 IC204 ONE POINT REPAIR GUIDE NO BOOTING WHEN YOU TURN THE UNIT ON NO GREEN LED ON FRONT PANEL When you turn on your set Green LED doesn t work it will not boot up 2 4 IC204 System 1 8 VA No 1 8 VA 2 4 1 Solution Replace MAIN board 2 4 2 How to troubleshoot Countermeasure 1 Please ch...

Page 51: ... 82nF L214 1 5uH IC205 1 BST 2 SW 3 NC 4 NC 5 EN SYNC 6 NC 7 PG 8 PGND 9 VIN 10 VOUT 11 FB 12 SS 13 VCC 14 AGND 12VA TO 1 0V_Core IC205 IC205 IC205 IC205 ONE POINT REPAIR GUIDE NO BOOTING WHEN YOU TURN THE UNIT ON NO GREEN LED ON FRONT PANEL When you turn on your set Green LED doesn t work it will not boot up 2 5 IC205 System 1 0 V No 1 0 V 2 5 1 Solution Replace MAIN board 2 5 2 How to troublesho...

Page 52: ...nF L211 4 7UH 6 0 2 C I 1 N I V 2 W S 3 D N G 4 T S B 5 N E 6 B F VOUT 0 798x 10K 1 5K 13K 1 1 5V IC206 IC206 ONE POINT REPAIR GUIDE NO BOOTING WHEN YOU TURN THE UNIT ON NO GREEN LED ON FRONT PANEL When you turn on your set Green LED doesn t work it will not boot up 2 6 IC206 System 1 5 V_DDR No 1 5 V 2 6 1 Solution Replace MAIN board 2 6 2 How to troubleshoot Countermeasure 1 Please check 12 VA o...

Page 53: ...L212 4 7UH 7 0 2 C I 1 N I V 2 W S 3 D N G 4 T S B 5 N E 6 B F VOUT 0 798x 3 9K 220 13K 1 1 05V IC207 IC207 ONE POINT REPAIR GUIDE NO BOOTING WHEN YOU TURN THE UNIT ON NO GREEN LED ON FRONT PANEL When you turn on your set Green LED doesn t work it will not boot up 2 7 IC207 System 1 05 VA No 1 05 VA 2 7 1 Solution Replace MAIN board 2 7 2 How to troubleshoot Countermeasure 1 Please check 5 1 VA of...

Page 54: ...GND 5 4 2 R K 2 8 1 6 4 2 R K 5 1 1 VOUT 1 24x 8 2K 1 5K 1 8V IC208 IC208 ONE POINT REPAIR GUIDE NO BOOTING WHEN YOU TURN THE UNIT ON NO GREEN LED ON FRONT PANEL When you turn on your set Green LED doesn t work it will not boot up 2 8 IC208 System 8V_LD No 8 V 2 8 1 Solution Replace MAIN board 2 8 2 How to troubleshoot Countermeasure 1 Please check 12 VA of IC208 pin2 VIN 2 If 12 VA is abnormal pl...

Page 55: ... 10nF IC701 1 OUT 2 GND 3 FLT 4 EN EN 5 IN 5 1VA to HDMI_5V IC701 IC701 ONE POINT REPAIR GUIDE 3 NO HDMI VIDEO AUDIO OUTPUT When unit is connected to HDMI TV using HDMI cable picture shows bad color no output or mixed color on the screen 3 1 HDMI 3 1 1 Solution Replace MAIN board 3 1 2 How to troubleshoot Countermeasure 1 Please check soldering status of HDMI jack and check HDMI 5 1 VA at IC701 pi...

Page 56: ...NC_ C722 100nF _NC C724 10uF C725 100nF C720 27pF JK720 1 2 3 Optical JK720 JK720 ONE POINT REPAIR GUIDE 4 NO SOUND 4 1 OPTICAL 4 1 1 Solution Replace MAIN board 4 1 2 How to troubleshoot Countermeasure 1 Please check 3 3 VA at C724 2 If 3 3 VA is ok please check SPDIF_OUT signal C720 when optical mode 3 If signal is abnormal replace MAIN board 4 1 3 Service hint Any picture Remark ...

Page 57: ...on message appears 5 1 WIRED NETWORK 5 1 1 Solution Replace MAIN board 5 1 2 How 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 JK701 3 If there is soldering problem please re soldering pin JK701 4 If problem still occurs replace MAIN board 5 1 3 Service hint Any picture Rema...

Page 58: ... USB Jack FB901 soldering status And check 5 V IC213 pin1 pin5 2 If soldering status and voltage is abnormal status replace MAIN board 6 1 3 Service hint Any picture Remark 5 1VA DGND DGND C296 10uF 5V_USB2 0 C2A1 10uF DGND C276 10uF C2A4 1uF R263 4 7K 5 1VA DGND C284 1nF_NC C281 100nF C291 100nF R270 0OHM PWR_CTL5 R244 10K 5 1VA IC213 1 OUT 2 GND 3 FLT 4 EN EN 5 IN 5 1VA to 5V_USB2 0 CN902 1 GND ...

Page 59: ...CTRICAL TROUBLESHOOTING GUIDE No 12 VA Secondary side Check or replace D105 Check or replace CE104 CE105 Check soldering Connector CN103 Check SMPS primer side Is the D105 output 12 VA D105 OK CE104 CE105 OK NO NO NO YES YES YES YES YES Is the VCC supplied to D105 anode NO 1 POWER SUPPLY ON SMPS BOARD ...

Page 60: ... Is the F102 normal Replace F102 same fuse YES YES NO Is TH101 normal Is D101 normal Is Q101 normal Is the VCC 16 V 27 V supplied to IC101 pin7 Replace TH101 Replace D101 Replace Q101 Is D104 normal Check or replace D104 Is R121 R123 normal Check or replace R121 R123 YES YES YES YES NO NO NO NO Power line of Main PCB is short POWER SUPPLY ON SMPS BOARD ...

Page 61: ...supplied to IC204 pin1 Is the VCC 12 VA supplied to IC201 pin1 Is the VCC 12 VA supplied to IC202 pin1 Is there any voltage on IC204 pin5 Refer to No 5 1 VA Check 12 VA on SMPS board Check 12 VA on SMPS board Check IC201 and replace Check IC202 and replace Check IC204 and replace Check PWR_CTL or voltage on IC302 Micom YES YES YES YES YES YES YES NO NO NO NO 2 POWER SUPPLY ON MAIN BOARD ...

Page 62: ...3 VA supplied to IC211 pin5 Is the VCC 5 1 VA supplied to IC207 pin1 Is there any voltage on IC211 pin4 Is there any voltage on IC207 pin5 Refer to No 3 3VA_MICOM Refer to No 5 1 VA Check IC211 and replace Check IC207 and replace Check PWR_CTL2 or voltage on IC302 Micom Check PWR_CTL or voltage on IC302 Micom YES YES YES YES YES YES NO NO NO NO POWER SUPPLY ON MAIN BOARD ...

Page 63: ...A supplied to IC205 pin9 Is the VCC 5 1 VA supplied to IC203 pin1 Is there any voltage on IC205 pin5 Is there any voltage on IC203 pin5 Check 12 VA on SMPS board Refer to No 5 1 VA Check IC205 and replace Check IC203 and replace Check PWR_CTL3 or voltage on IC302 Micom Check PWR_CTL3 or voltage on IC302 Micom YES YES YES YES YES YES NO NO NO NO POWER SUPPLY ON MAIN BOARD ...

Page 64: ...supplied to IC209 pin5 Is the VCC 12 VA supplied to IC206 pin1 Is there any voltage on IC209 pin4 Is there any voltage on IC206 pin5 Refer to No 3 3VA_MICOM Check 12 VA on SMPS board Check IC209 and replace Check IC206 and replace Check PWR_CTL5 or voltage on IC302 Micom Check PWR_CTL4 or voltage on IC302 Micom YES YES YES YES YES YES NO NO NO NO POWER SUPPLY ON MAIN BOARD ...

Page 65: ...VA supplied to IC212 pin5 Is the VCC 3 3 VA supplied to IC209 pin5 Is there any voltage on IC212 pin4 Is there any voltage on IC209 pin4 Refer to No 5 1 VA Refer to No 3 3VA_MICOM Check IC212 and replace Check IC209 and replace Check PWR_CTL5 or voltage on IC302 Micom Check PWR_CTL5 or voltage on IC302 Micom YES YES YES YES YES YES NO NO NO NO POWER SUPPLY ON MAIN BOARD ...

Page 66: ...upplied to IC208 pin2 Is the VCC 5 1 VA supplied to IC213 pin5 Is there any voltage on IC208 pin1 Is there any voltage on IC213 pin4 Check 12 VA on SMPS board Refer to No 5 1 VA Check IC208 and replace Check IC213 and replace Check PWR_CTL5 or voltage on IC302 Micom Check PWR_CTL5 or voltage on IC302 Micom YES YES YES YES YES YES NO NO NO NO POWER SUPPLY ON MAIN BOARD ...

Page 67: ...UARXD R408 0 1608 UATXD 1 8VA_STB TP402 R401 0 1608 TP401 1 8V_NOR R413 330 1 8VA_STB_LDO C402 10pF C401 10pF C403 1uF X401 27MHz 1 INPUT OUTPUT 2 FLOAT 3 INPUT OUTPUT 4 FLOAT C406 4 7uF TP403 TP404 IC501 A25 AVDD18_PLLGP G23 AVDD18_PLLGP_STB C26 AVDD18_PLLGP_AUD A26 XTAL1 B26 XTALO D27 TP_PLLGP E27 TN_PLLGP N29 UATXD N30 UARXD Ref 10pF 330ohm 1 SYSTEM PART 1 IC501 MT8581 X TAL 27 MHz 1 ...

Page 68: ...N9 VDD R1 VDD R9 VDD M8 VREFCA N3 A0 P7 A1 P3 A2 N2 A3 P8 A4 P2 A5 R8 A6 R2 A7 T8 A8 R3 A9 L7 A10 AP R7 A11 N7 A12 BC T3 A13 T7 NC M7 NC F3 DQSL G3 DQSL C7 DQSU B7 DQSU E7 DML D3 DMU M2 BA0 N8 BA1 M3 BA2 K1 ODT L8 ZQ J7 CK K7 CK K9 CKE L2 CS K3 CAS J3 RAS L3 WE T2 RESET J1 NC J9 NC L1 NC L9 NC A1 VDDQ A8 VDDQ C1 VDDQ C9 VDDQ D2 VDDQ E9 VDDQ F1 VDDQ H2 VDDQ H9 VDDQ H1 VREFDQ E3 DQL0 F7 DQL1 F2 DQL2...

Page 69: ...l rights reserved Only for training and service purposes 6 DGND SPDIF_OUT 3 3V_NOR R720 0OHM DGND C723 100nF _NC C721 100nF NC_ C722 100nF _NC C724 10uF C725 100nF C720 27pF JK720 JSTIB15 1 2 3 Optical 3 AUDIO PART S PDIF MT8581_AUDIO_SPDIF 6 ...

Page 70: ... R737 1 8K HDMITX20_CH1_P D722 1 pinC 2 GND 3 pinC 4 pinC 5 pinC HDMITX20_CH1_M HDMITX20_CH2_M TP720 HDMITX20_CH2_P DGND DGND R721 0_NC HDMITX20_CEC HDMITX20_HTPLG R725 0 R735 1 8K R739 15K_NC DGND HDMITX20_CLK_M DGND R731 27K DGND D728 1 I O1 2 GND 3 I O2 4 I O3 5 VBUS 6 I O4 CN720 1 TX2 2 TX2_SHD 3 TX2 4 TX1 5 TX1_SHD 6 TX1 7 TX0 8 TX0_SHD 9 TX0 10 TX_CLK 11 TX_SHD 12 TX_CLK 13 CEC 14 ARC 15 SCL...

Page 71: ...3 54 Copyright 2020 LG Electronics Inc All rights reserved Only for training and service purposes X pin FFC Optical X pin Harness 9 Pin 5 Pin 45 Pin Ethernet USB RC HDMI 15Pin 1 2 3 4 5 6 WIRING DIAGRAM ...

Page 72: ...ernal MICOM CEC_RX TX SMPS Front USB2 0 IR Eject 5V_USB2 0 3 3VA DMSO FOSO FMSO 2 TRSO TLSO MUTE1 2 TRAYPWM 12V_Motor 5V_Motor 3 3V LOAD U V W SL1 2 TR TL FR CO_A CO_B FG TRAYIN TRAYOUT Motor Driver TPIC2060 MT8577A 1 2V 3 3V SATA 25MHz LED Play Pause Stop Power HDMI 2 0 SMPS Front 12VA 3 3VA_STB 5 3VA 12V_Motor 1 0V_Core 1 5V_DDR MP9453 SW SY6288C3 10 A 1 5A 5V_USB2 0 1A 0 2A 3 3V_WiFi 1A MP8714 ...

Page 74: ...1 Vin 16 V Measured Voltage VIN 12 05 V Vout 8 12 V IC209 Swich IC Spec VIN 2 5 5 5 V Vout VIN Measured Voltage VIN 3 435 V Vout 3 424 V IC210 Swich IC Spec VIN 2 5 5 5 V Vout VIN Measured Voltage VIN 3 437 V Vout 3 436 V IC211 Swich IC Spec VIN 2 5 5 5 V Vout VIN Measured Voltage VIN 3 435 V Vout 3 43 V IC212 Swich IC Spec VIN 4 5 5 5 V Vout VIN Measured Voltage VIN 5 16 V Vout 5 15 V IC213 Swich...

Page 75: ...s Inc All rights reserved Only for training and service purposes 3 60 3 59 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 80: ...M DISASSEMBLY 1 Cover Top 4 2 2 Clamp Assembly 4 2 2 1 Plate 4 2 2 2 Magnet 4 2 2 3 Clamp 4 2 3 Tray Disc 4 3 4 Pick Up Assembly 4 4 5 Base Up Down 4 4 6 Belt Loading 4 5 7 Gear Pulley 4 5 8 Gear Loading 4 5 9 Guide 4 5 10 Deck PCB Assembly 4 5 11 Motor Assembly 4 5 12 FFC Cable 4 5 SECTION 4 MECHANISM CONTENTS ...

Page 81: ...he Cover Top 2 Clamp Assembly 1 Place the Clamp Assembly as Figure B 2 Bending the Cover Top in direction of arrow 2 as Figure B 3 Separate the Clamp Assembly from the Cover Top 2 1 Plate 1 Turn the Plate to a counterclockwise direction and then lift up the Plate 2 Remove the Plate 2 2 Magnet Remove the Magnet 2 3 Clamp Remove the Clamp 1 1 3 S1 S1 Cover Top Figure A 2 L1 Figure B Clamp Assembly P...

Page 82: ... separated from the MD Sub Assembly completely Note When reassembling place the Guide as Figure E MD Sub Assembly Figure D 3 1 1 2 2 Tray Disc Tray Disc Figure E Guide 3 Tray Disc 1 Insert and push a flat head screwdriver in the Emergency eject hole H1 at the right side so that the Tray Disc is ejected about 15 20 mm 2 Pull the Tray Disc until it is locked Bottom side view Tray Disc Tray Disc Figu...

Page 83: ...e B portion of the Base Up Down in the C portion of the Guide as Figure G 2 When reassembling insert the D portion of the Base Up Down in the Hole H2 of the Base Main as Figure G 3 3 2 1 L2 Base Up Down Figure G 2 Figure G 1 C B Guide Base Up Down Base Main Figure G B H2 A Figure G 3 D 4 Pick Up Assembly 1 Detach the Gasket Tape 2 Disconnect the wires BLK RED BRN ORN from the Deck PCB Assembly by ...

Page 84: ...e H 1 2 Separate the Guide from the Base Main 10 Deck PCB Assembly 1 Disconnect the wires RED BK form the Deck PCB Assembly by desoldering 2 Remove the 1 screw S3 3 Separate the Deck PCB Assembly from the Base Main 11 Motor Assembly Unlock the Locking Tab L4 in direction of arrow and then separate the Motor Assembly from the Base Main 12 FFC Cable Remove the FFC Cable Gear Pulley Belt Loading Deck...

Page 86: ... reserved Only for training and service purposes SECTION 5 F E LOADER PART CONTENTS LD CHECK GUIDE 5 2 1 PURPOSE 5 2 2 LD CHECK PROCEDURE 5 2 BARCODE SCAN GUIDE 5 3 1 PURPOSE 5 3 2 REQUIRED TO INSERT NEW BARCODE VALUE 5 3 3 METHOD 5 3 4 PROCEDURE 5 3 ...

Page 87: ...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 1 PURPOSE If LD Laser Diode have problem disc reading problem can happen So it is needed to check LD status ...

Page 88: ...nging Main Board Assembly After changing Main Board Flash IC 3 METHOD There are 2 ways to save barcode information 1 Use 2D barcode scanner If there is 2D barcode scanner use this method 2 Save default barcode information into USB 4 PROCEDURE 4 1 Use 2D barcode scanner 1 Power on the set 2 Press settings 3 Under DISPLAY highlighted condition press 5 1 7 7 7 7 7 Enter on the remote controller to di...

Page 89: ...ghts reserved Only for training and service purposes 4 2 Use USB 1 Copy DEFAULT_BARCODE Folder into USB The folder include txt file as below 2 Power on the set 3 Insert USB with the set and If USB is recognized barcode is downloaded automatically ...

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