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ⓒ

LG Electronics. Inc.2009

Electronics 6-3

Standard Repair Process Detail Technical Manual

LED drive

B+ 24V measuring method

A. Video error_No video/Normal audio 

A2

Established 

date 

Revised 

date 

Error 

symptom

Content

A2

Measure DC 24V applying to 

LED drive B/D

from Power Board.

Output 24V from Power Board -> supply to 

LED drive B/D

.

Check Pin contacting statement and connection statement.

LED drive B/D

POWER 

BOARD

2009 . 7. 29

2009. 9 .01

LED LCD  TV

www.television-magazine.co.uk

Содержание LH9000 Series

Страница 1: ...ⓒ LG Electronics Inc 2008 LED LCD TV Repair Guide New models 2009 Applicable to model numbers xxLH9000 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 2: ...SDDR_A 0 12 MP6211DH IC402 USB Power TDDR_A 0 12 USB1_DM DP Serial Flash For Boot IC103 HDMI 1 2 3 Rear 3 LGE7329A IC900 Panel LED 200Hz TMDS351PAGR IC604 TMDS 0 7 HDMI_CEC HPD 5V_HDMI I2C 1 LH9000 ZA Block Diagram TDFW G235D TU1200 74LCX244 Buffer IC501 PCM_A 0 7 CI_ADDR 0 7 LVDS EEPROM IC105 I2C SPI_CK CS D0 D 1 Side AV USB0_DM DP HDMI 4 Side AUDIO Out Head Phone RS 232C DDR2 SDRAM 512Mb IC301 D...

Страница 3: ...pot external device color error 5 6 No power 6 7 B Power error Off when on off while viewing power auto on off 7 8 No audio Normal video 8 9 C Audio error Wrecked audio discontinuation noise 9 10 No response in remote controller key error 10 11 D Function error External device recognition error 11 12 E Noise Circuit noise mechanical noise 12 13 F Exterior error Exterior defect 13 First of all Chec...

Страница 4: ...ower Board or parts End Always check record S W Version and White Balance value before replacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Electronics 6 3 Standard Repair Process Revised date 2009 7 29 1 13 Error symptom A Video error No video Audio OK A3 A1 A2 A4 A7 1 First of all Check whether all of cables between board is inserted properly or no...

Страница 5: ... No Video No audio Check and replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A5 Established date Electronics 6 3 Revised date 2 13 Error symptom 2 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 6: ...aker TV etc SVC Bulletin Replace Main B D Check Tuner soldering Normal Picture Y N Y Close Normal Picture Y Close Menu Setup Booster By using Digital signal level meter By using Diagnostics menu on OSD Menu Setup Diagnostic Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact with signal distributor or broadcaster Cable or Air N N Normal Picture Y Close N A7 Standa...

Страница 7: ... and cable Y External device Cable normal RGB HDMI DVI error Check external device and cable Replace Main B D Replace Main B D N N A Video error Color error A8 N Y End Replace module Request repair for external device cable Replace T Con Board N Y Color error LGD Module Only Other Module Color error Check Test pattern A11 A10 A27 Standard Repair Process Established date Electronics 6 3 Revised dat...

Страница 8: ...tern Generator Set top Box etc N Y Replace Main B D Screen normal Check screen condition by input External Input Component RGB HDMI DVI Request repair for external device Component error RGB error HDMI DVI Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main B D Screen normal N Y...

Страница 9: ...5V Replace Power B D N Y Normal voltage Replace Power B D Y A15 A16 A17 A18 Standard Repair Process Established date Electronics 6 3 Revised date 6 13 Error symptom 09 years new model apply mechanical power switch to reduce power consumption in stand by status If mechanical power switch off Doesn t turn on by remote control Doesn t appear LED light Please refer to the A21 Page 6 Stand By Red Opera...

Страница 10: ...POWEROFF_REMOTEKEY Power off by REMOTE CONTROL POWEROFF_OFFTIMER Power off by OFF TIMER POWEROFF_SLEEPTIMER Power off by SLEEP TIMER POWEROFF_INSTOP Power off by INSTOP KEY POWEROFF_AUTOOFF Power off by AUTO OFF POWEROFF_ONTIMER Power off by ON TIMER POWEROFF_RS232C Power off by RS232C POWEROFF_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Powe...

Страница 11: ...mal voltage Y N Replace Power Board and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A22 A23 Disconnection Established date Electronics 6 3 Revised date 8 13 Error symptom Standard Repair Process 8 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 12: ...y for External Input Connect and check other external device N Y Normal audio Check and fix external device Replace Power B D N Y Normal voltage Check input signal RF External Input signal Signal normal When RF signal is not received Request repair to external cable ANT provider Y Check audio B Voltage 20V or 24V Replace Main B D In case of External Input signal error Check and fix external device...

Страница 13: ...rating Check B 5V On Main B D A25 Normal Voltage Close N N Check 5v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A21 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A25 Replace Main B D Y Y N Check R C Operation Normal operating Y Check Repair Cable connection Connector solder Normal operating Close N Check Replace Assembly status Key PCB tool A2...

Страница 14: ... error Check and fix external device cable RGB HDMI DVI Optical Recognition error Replace Main B D Replace Main B D Fix in accordance with technical information D Function error External device recognition error Established date Electronics 6 3 Revised date 11 13 Error symptom Standard Repair Process 11 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 15: ...oceed as shown in the solution manual For models without any fix information provide the description OR Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise With LED drive B D Without LED drive...

Страница 16: ...e Replace cabinet Replace remote controller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Established date Electronics 6 3 Revised date 13 13 Error symptom Standard Repair Process 13 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 17: ...r symptom Content Check LCD back light with naked eye A Video error_No video Normal audio Electronics 6 3 A1 2009 7 29 2009 9 01 LED LCD TV Remove back cover Æ Power On Æ Check backlighting at 4 points Remove back cover Æ Power On Æ Check backlighting at 4 points w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 18: ...o Normal audio A2 Established date Revised date Error symptom Content A2 Measure DC 24V applying to LED drive B D from Power Board Output 24V from Power Board supply to LED drive B D Check Pin contacting statement and connection statement LED drive B D POWER BOARD 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 19: ...nical Manual Check LED drive B D supply voltage A Video error_No video Normal audio A3 Established date Revised date Error symptom Content A3 Check each voltage output 5 2V 12V 24V from power board 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 20: ...G B GAIN Cut value of Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD Electronics 6 3 Standard Repair Process Detail Technical Manual Check White Balance value A Video error_No video Normal audio A4 Established date Revised date Error symptom Content A4 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 21: ...nical Manual Check LED drive B D supply voltage A Video error_No video Normal audio A5 Established date Revised date Error symptom Content A5 Check each voltage output 5 2V 12V 24V from power board 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 22: ...e attenuator 10dB 15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop A6 Established date Revised date Error symptom Content Electronics 6 3 A6 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 23: ...deo error_Video error video lag stop 1 Checking method for remote controller for adjustment Press the IN START with the remote controller for adjustment Version A7 Established date Revised date Error symptom Content Electronics 6 3 A7 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 24: ... 1 A Video error _Vertical Horizontal bar residual image light spot A8 Established date Revised date Error symptom Content Electronics 6 3 A8 2009 7 29 As the part connecting to the external input check the screen condition by signal 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 25: ...d 2 After measuring each voltage from power supply finally replace the MAIN BOARD Standard Repair Process Detail Technical Manual TUNER checking part A Video error_Video error video lag stop A9 Established date Revised date Error symptom Content Electronics 6 3 A9 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 26: ...al Check Link Cable LVDS reconnection condition A Video error_Color error A10 Established date Revised date Error symptom Content Electronics 6 3 A10 Link Cable Contacting Statement Check Area 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 27: ... can view 6 types of patterns using the ADJ Key Checking item 1 Defective pixel 2 Residual image 3 MODULE error ADD BAR SCAN BAR 4 Video error Classification of MODULE or Main B D A11 Established date Revised date Error symptom Content Electronics 6 3 A11 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 28: ...1 A Video error _Vertical Horizontal bar residual image light spot A12 Established date Revised date Error symptom Content LED LCD TV Electronics 6 3 A12 2009 7 29 As the part connecting to the external input check the screen condition by signal 2009 9 01 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 29: ...al Check Link Cable LVDS reconnection condition A Video error_Color error A13 Established date Revised date Error symptom Content Electronics 6 3 A13 Link Cable Contacting Statement Check Area 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 30: ... can view 6 types of patterns using the ADJ Key Checking item 1 Defective pixel 2 Residual image 3 MODULE error ADD BAR SCAN BAR 4 Video error Classification of MODULE or Main B D A14 Established date Revised date Error symptom Content Electronics 6 3 A14 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 31: ...front display LED B Power error _No power A2 Established date Revised date Error symptom Content Electronics 6 3 A15 ST BY Statement Red Power ON Statement White Led Color Difference Mechanical Button 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 32: ...ror _No power A14 Established date Revised date Error symptom Content Electronics 6 3 A16 Power Check Method 1 Check AC220V Input at Power Code 2 Check for Mechanical S W ON OFF 3 Check for connection area and FUSE breaking going to Power Board 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 33: ...rror _No power A17 Established date Revised date Error symptom Content Electronics 6 3 A17 Check Method at Power ON 1 Check ST BY DC 5V Output Voltage at Power Board 2 Check Power On High Voltage about more than DC1 8 to Power Board 1 2 2009 9 01 LED LCD TV 2009 7 29 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 34: ... B Power error _No power A18 Established date Revised date Error symptom Content Electronics 6 3 A18 Check each voltage output 5 2V 12V 24V from power board POWER BOARD voltage measuring method 2009 9 01 LED LCD TV 2009 7 29 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 35: ... button at bottom or back side If the mechanical button is selected OFF TV doesn t turn on as well as power led off This button is applied for saving power consumtion at ST BY status Therefore the position On or Off of this mecanical button must be checked before repairing as no power problem Mechanical Button On LED LCD TV 2009 7 29 2009 9 01 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 36: ... the entry into adjustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A15 Established date Revised date Error symptom Content Electronics 6 3 A20 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 37: ...PIN voltage checking method B Power error _Off when on off whiling viewing A21 Established date Revised date Error symptom Content Electronics 6 3 A21 Check each voltage output 5 2V 12V 24V from power board 2009 9 01 LED LCD TV 2009 7 29 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 38: ...Menu 3 Select TV Speaker from Off to On Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video A16 Established date Revised date Error symptom Content Electronics 6 3 A22 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 39: ... A23 Check Procedure at No Sound Check 24V connector contacting point statement of main board Measure 24V input voltage supplied by Power Board remove connector and check it out if there is no input voltage Put SPK terminal into tester RX1 when touching GND and output terminal if make Cheuk Cheuk sound it is OK 2009 9 01 LED LCD TV 2009 7 29 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 40: ...check it out Put SPK terminal into tester RX1 when touching GND and output terminal if make Cheuk Cheuk sound it is OK Standard Repair Process Detail Technical Manual A24 Established date Revised date Error symptom Content Electronics 6 3 Voltage and SPK Check Method at Sound Defect C Audio error_Sound distortion cut A24 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o ...

Страница 41: ...ontent Electronics 6 3 A25 Check Procedure 1 Check DC5V P402 PIN 6 onto 5V_ST Terminal 2 When checking Pre Amp at Power On Statement If an indicator of analogue tester is moving a little It is OK But If not it is Pre Amp defect P402 PIN 8 Input voltage terminal 5V_ST The remote receiving terminal IR 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 42: ...icture A19 Established date Revised date Error symptom Content Electronics 6 3 A26 T Con Board 1 First of all replace T Con B d when abnormal displaying in case LGD module 2 Replace module when abnormal displaying constantly after exchanging T Con B d 2009 7 29 2009 9 01 LED LCD TV w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 43: ...n Defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Appendix Exchange T Con Board 1 A 1 5 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 44: ...ction Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 A 2 5 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 45: ...ⓒ LG Electronics Inc 2009 Appendix Exchange LED drive Board No Light Dim Light Dim Light Dim Light No picture Sound Ok A 3 5 w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 46: ...nge the Module 1 Panel Mura Light leakage Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage A 4 5 Un repairable Cases In this case please exchange the module w w w t e l e v i s i o n m a g a z i n e c o u k ...

Страница 47: ...tical Line Source TAB IC Defect Vertical Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix Exchange the Module 2 A 5 5 Un repairable Cases In this case please exchange the module w w w t e l e v i s i o n m a g a z i n e c o u k ...

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