LG 32LB550B Service Manual

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LED TV

SERVICE MANUAL

CHASSIS : LJ43B

MODEL : 32LB550B

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

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Europe/Africa

Asia/Oceania

32LB550B-SD

Internal Use Only

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Summary of Contents for LG 32LB550B

Page 1 LED TV LED TV SERVICE MANUAL SERVICE MANUAL CHASSIS : LJ43B CHASSIS : LJ43B MODEL : 32LB550B MODEL : 32LB550B 32LB550B-SD 32LB550B-SD CAUTION CAUTION BEFORE SERVICING THE CHASSIS, BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Page 2 CONTENTS CONTENTS CONTEN CONTENTS ......................................PRODUC PRODUCT SAFETY ........SAFETY ..........................SPECIFIC SPECIFICA TION TION ....................................ADJUSTME ADJUSTMENT INSTRUCT INSTRUCTION ..........................BLOCK DIAGRAM BLOCK DIAGRAM....
Page 3 SAFETY PRECAUTIONS SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE IMPORTANT SAFETY NOTICE Many el Many electrical ectrical and mechanic mechanical parts al parts in this in this chassis chassis have spec have special safety safety-related -related characteristics. characteristics. These These parts ar parts are identified e identified...
Page 4 SERVICING PRECAUTIONS SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service CAUTION: Before servicing receivers covered by this service 2. After removing an electrical assembly equipped with ES 2. After removing an electrical assembly equipped with ES manual and its supplements and addenda, read and follow the manual and its supplements and addenda, read and follow the devices, place the assembly on a conductive surface such as devices, place the assembly on a conductive surface such as...
Page 5 IC Remove/Replacement IC Remove/Replacement 3. Solder the connections. 3. Solder the connections. Some chassis circuit boards have slotted holes (oblong) through Some chassis circuit boards have slotted holes (oblong) through CAUTION: Maintain original spacing between the replaced CAUTION: Maintain original spacing between the replaced which the IC leads are inserted and then bent at against the cir ...
Page 6 SPECIFICATION SPECIFICATION NOTE : Specifications and others are subject to NOTE : Specifications and others are subject to change without notice for improvement change without notice for improvement. 1. Application range 1. Application range 3. Test method 3. Test method This spec sheet is applied all of the 32”, 39”, 42”, 47”, 50”, This spec sheet is applied all of the 32”, 39”, 42”, 47”, 50”, 1) Performance: LGE TV test method followed...
Page 7 Specication Specication 39LB5610-SC 39LB5610-SC 50LB5600-SB 50LB5600-SB 50LB5610-SC 50LB5610-SC...
Page 8 5. External Input Support Format 5. External Input Support Format 5.1. Component input(Y, CB/PB, CR/PR) 5.1. Component input(Y, CB/PB, CR/PR)
Page 9 5.2. HDMI Input (PC/DTV) 5.2. HDMI Input (PC/DTV) *HDMI PC support only Rear HDMI Input *HDMI PC support only Rear HDMI Input *If use DVI to HDMI cable for PC, you have to use external SPK for PC audio sound. *If use DVI to HDMI cable for PC, you have to use external SPK for PC audio sound.
Page 10 ADJUSTMENT INSTRUCTION ADJUSTMENT INSTRUCTION 1. Application 1. Application 3. Main PCB check process 3. Main PCB check process This spec sheet is applied all of the LED TV with LJ43B, This spec sheet is applied all of the LED TV with LJ43B, * APC –...
Page 11 * USB DOWNLOAD(*.epk file download) * USB DOWNLOAD(*.epk file download) After After download download ing, ha ing, ha ve to ve to adjust adjust (1) Put the USB Stick to the USB socket. (1) Put the USB Stick to the USB socket. Option again.
Page 12 ※ ※ 4. Total Assembly line process 4. Total Assembly line process Connecting picture of the measuring instrument Connecting picture of the measuring instrument (On Automatic control) (On Automatic control) 4.1. Adjustment Preparation 4.1. Adjustment Preparation Inside PATTERN is used when W/B is controlled. Connect to Inside PATTERN is used when W/B is controlled.
Page 13 *Manual W/B process using adjusts Remote control.(TBD) *Manual W/B process using adjusts Remote control.(TBD) ※ ※ CASE Cool CASE Cool ■ ■ Color analyzer(CA100+, Color analyzer(CA100+, CA210) should be CA210) should be used in used in First adjust the coordinate far away from the target value(x, y). First adjust the coordinate far away from the target value(x, y).
Page 14 EDID DATA ■ Enter EDID D/L mode. ■ Enter EDID D/L mode. (1) HD 2D EDID Data (32LB550B/560B) => TBD (1) HD 2D EDID Data (32LB550B/560B) => TBD ■ Enter “START” by pushing “OK” key. ■ Enter “START” by pushing “OK” key.
Page 15 (2) FHD 2D EDID Data (S/W 1.01.20) (LB5500, LB5600 except (1) Pallet moves in the station. (POWER CORD / AV CORD is (1) Pallet moves in the station. (POWER CORD / AV CORD is 32LB550B/LB560B) 32LB550B/LB560B) tightly inserted) tightly inserted)
Page 16 6. 3D Function Test (Only LB620) 6. 3D Function Test (Only LB620) (Pattern Generator MSHG-600, MSPG-6100 [SUPPORT (Pattern Generator MSHG-600, MSPG-6100 [SUPPORT HDMI1.4]) HDMI1.4]) * HDMI mode NO. 872 , pattern No.83 * HDMI mode NO. 872 , pattern No.83 1) Please input 3D test pattern like below (HDMI mode NO.
Page 17 BLOCK DIAGRAM BLOCK DIAGRAM M M H H O O M M ) ) h h ) ) S S 1 1 R R A A s s t t ) ) ) ) ) ) i i A A 0 0 0...
Page 18 EXPLODED VIEW EXPLODED VIEW IMPORTANT SAFETY NOTICE IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts parts identified identified Schematic Schematic Diagram...
Page 19 TP for NON-EU models(except EU and China) TP for NON-EU models(except EU and China) slot slot SCART SCART Headphone Headphone /PCM_REG /PCM_REG PCM_D[0] PCM_D[0] PCM_A[8] PCM_A[8] CI_TS_CLK CI_TS_CLK SCART1_MUTE SCART1_MUTE HP_LOUT HP_LOUT /PCM_OE /PCM_OE PCM_D[1] PCM_D[1] PCM_A[9] PCM_A[9] CI_TS_VAL CI_TS_VAL SC1_ID SC1_ID HP_ROUT...
Page 21 USB (SIDE) USB (SIDE) +5V_USB +5V_USB JK700 JK700 C700 C700 C703 C703 ZD700 ZD700 ) ) SD05 SD05 22uF 22uF 22uF 22uF G G 1 1 U U L L S S ( ( USB_HDD_CAP USB_HDD_CAP - - C C Z Z O...
Page 23 SPDIF SPDIF SPDIF SPDIF OPTIC OPTIC JACK JACK +3.3V_Normal +3.3V_Normal 5.15 Mstar Circuit Application 5.15 Mstar Circuit Application SPDIF_OPTIC SPDIF_OPTIC JK1001 JK1001 JST1223-001 JST1223-001 1 1 i i b b e e 2 2 O O p p t t i ...
Page 24 LVDS (NON EU) LVDS (NON EU) [51Pin [51Pin LVDS LVDS Connector] Connector] REVERSE(10bit) REVERSE(10bit) [30Pin [30Pin LVDS LVDS Connector] Connector] (For (For 60Hz) 60Hz) (For (For 60Hz_Normal) 60Hz_Normal) Change Change S7LR S7LR MO_FHD MO_FHD MO_HD MO_HD MIRROR MIRROR Pol-change Pol-change P1100 P1100 P1101...
Page 26 Serial Serial Flash Flash boot boot +3.5V_ST +3.5V_ST +3.5V_ST +3.5V_ST SPI_FLASH_MACRONIX SPI_FLASH_MACRONIX IC1300 IC1300 R1301 R1301 MX25L8006EM2I-12G MX25L8006EM2I-12G +3.5V_ST +3.5V_ST 4.7K 4.7K C1300 C1300 0.1uF 0.1uF /SPI_CS /SPI_CS R1300 R1300 SO/SIO1 SO/SIO1 HOLD# HOLD# SPI_SDO SPI_SDO SCLK SCLK /FLASH_WP /FLASH_WP SPI_SCK SPI_SCK R1302...
Page 27 Central and South Americatuner block Central and South Americatuner block TU1401 TU1401 TU1400 TU1400 TDJK-T101F TDJK-T101F TDJM-K101F TDJM-K101F R1407 R1407 RF_SWITCH_CTL RF_SWITCH_CTL +3.3V_TU +3.3V_TU NON_DVB_T2 NON_DVB_T2 DVB_T2 DVB_T2 C1411 C1411 R1409 R1409 0.1uF 0.1uF B1[+3.3V] B1[+3.3V] B1[+3.3V] B1[+3.3V] L1401 L1401 UBW2012-121F UBW2012-121F TU_I2C_NON_FILTER...
Page 28 COMPONENT & AV1(COMMON), AV2 COMPONENT & AV1(COMMON), AV2 C O M P _ A V 1 / 2 _ Y G C O M P _ A V 1 / 2 _ Y G J K 1 7 0 1 J K 1 7 0 1 P P J 2 4 8 - 2 1 P P J 2 4 8 - 2 1...
Page 29 RS-232C 4PIN & MSTAR DEBUG 4PIN RS-232C 4PIN & MSTAR DEBUG 4PIN RS-232C RS-232C 4PIN 4PIN RS232C_DEBUG_4P RS232C_DEBUG_4P +3.5V_ST +3.5V_ST P4000 P4000 12507WS-04L 12507WS-04L R4001 R4001 PM_TXD PM_TXD R4000 R4000 PM_RXD PM_RXD PM_RXD PM_RXD RM_TXD RM_TXD MSTAR MSTAR DEBUG DEBUG 4PIN 4PIN MSTAR_DEBUG_4P...
Page 30 IR/LED + Digital Eye + Control IR/LED + Digital Eye + Control +3.5V_ST +3.5V_ST R4604 R4604 R4603 R4603 R4601 R4601 P4600 P4600 KEY1 KEY1 P4601 P4601 12507WR-10L 12507WR-10L C4602 C4602 12507WR-08L 12507WR-08L 0.1uF 0.1uF R4602 R4602 KEY2 KEY2 C4603 C4603 0.1uF 0.1uF +3.5V_ST...
Page 33 AUDIO AUDIO AMP(TI) AMP(TI) AMP_COIL_GET AMP_COIL_GET AMP_COIL_GET AMP_COIL_GET AMP_COIL_GET AMP_COIL_GET AMP_COIL_GET AMP_COIL_GET L5603-*1 L5603-*1 L5604-*1 L5604-*1 L5605-*1 L5605-*1 L5606-*1 L5606-*1 10.0uH 10.0uH 10.0uH 10.0uH 10.0uH 10.0uH 10.0uH 10.0uH AMP_COIL_TAIYO AMP_COIL_TAIYO AMP_COIL_TAIYO AMP_COIL_TAIYO AMP_COIL_TAIYO AMP_COIL_TAIYO AMP_COIL_TAIYO AMP_COIL_TAIYO L5603-*2 L5603-*2 L5604-*2 L5604-*2 L5605-*2 L5605-*2 L5606-*2...
Page 34 GATE GATE +3.3V_Normal +3.3V_Normal MHL_SW_AND_GATE MHL_SW_AND_GATE IC5801 IC5801 74LVC1G08GW 74LVC1G08GW MHL_CD_SENSE MHL_CD_SENSE MHL_OCP_EN MHL_OCP_EN MHL_5V_EN MHL_5V_EN SYMBOL SYMBOL MARK MARK OF OF THIS THIS SCHEMETIC SCHEMETIC DIAGRAM DIAGRAM INCORPORATES INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FROM X-RADIATION.
Page 36 Contents of LCD TV Standard Repair Process Contents of LCD TV Standard Repair Process Error Error symptom symptom (High (High category) category) Error Error symptom symptom (Mid (Mid category) category) Page Page Remarks Remarks No video/Normal video/Normal audio audio No video/No video/No audio audio T T uning...
Page 37 Standard Repair Process Standard Repair Process Established Established A. Video error A. Video error Error Error 2012. 01 .14 2012. 01 .14 date date LCD TV LCD TV symptom symptom No video/ Normal audio No video/ Normal audio Revised date Revised date 1/14 1/14...
Page 38 Standard Repair Process Standard Repair Process Established Established A. Video error A. Video error 2012 . 01 .14 2012 . 01 .14 Error Error date date LCD TV LCD TV symptom symptom No video/ No audio No video/ No audio Revised date Revised date 2/14...
Page 39 Standard Repair Process Standard Repair Process Established Established A. Video error A. Video error 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Picture broken/ Freezing Picture broken/ Freezing Revised date Revised date 3/14 3/14 .
Page 40 Standard Repair Process Standard Repair Process Established Established A. Video error A. Video error 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Tuning fail, Picture broken/ Freezing Tuning fail, Picture broken/ Freezing Revised date Revised date 4/14...
Page 41 Standard Repair Process Standard Repair Process Established Established A. Video error A. Video error 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Color error Color error Revised date Revised date 5/14 5/14 A8/ A9 A8/ A9 ※...
Page 42 Standard Repair Process Standard Repair Process A. Video error A. Video error Established Established 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Vertical / Horizontal bar, residual image, Vertical / Horizontal bar, residual image, Revised date Revised date 6/14...
Page 43 Standard Repair Process Standard Repair Process Established Established B. Power error B. Power error 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom No power No power Revised date Revised date 7/14 7/14 DC Power on DC Power on Replace...
Page 44 Standard Repair Process Standard Repair Process Established Established B. Power error B. Power error 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Off when on, off while viewing, power auto on/off Off when on, off while viewing, power auto on/off Revised date Revised date 8/14...
Page 45 Standard Repair Process Standard Repair Process Established Established C. Audio error C. Audio error 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Revised date Revised date No audio/ Normal video No audio/ Normal video 9/14 9/14 Check user...
Page 46 Standard Repair Process Standard Repair Process Established Established C. Audio error C. Audio error 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Wrecked audio/ Wrecked audio/ discontinuat discontinuation/noise ion/noise Revised date Revised date 10/14 10/14 →...
Page 47 Standard Repair Process Standard Repair Process D. Function error D. Function error Established Established 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Remote control & Local switch checking Remote control & Local switch checking Revised date Revised date 11/14...
Page 48 Standard Repair Process Standard Repair Process Established Established D. Function error D. Function error 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom External device recognition error External device recognition error Revised date Revised date 12/14 12/14...
Page 49 Standard Repair Process Standard Repair Process Established Established E. Noise E. Noise 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Circuit noise, mechanical noise Circuit noise, mechanical noise Revised date Revised date 13/14 13/14 Replace PSU(with LED driver)
Page 50 Standard Repair Process Standard Repair Process Established Established F. Exterior defect F. Exterior defect 2012. 01 .14 2012. 01 .14 Error Error date date LCD TV LCD TV symptom symptom Exterior defect Exterior defect Revised date Revised date 14/14 14/14 Zoom part with Zoom part with Module...
Page 51 Contents of LCD TV Standard Repair Process Detail Technical Manual Contents of LCD TV Standard Repair Process Detail Technical Manual Error Error symptom symptom Content Content Page Page Remarks Remarks Check Check LCD LCD back back light light with with naked naked eye LED driver driver B+...
Page 52 Contents of LCD TV Standard Repair Process Detail Technical Manual Contents of LCD TV Standard Repair Process Detail Technical Manual Continued from previous page Continued from previous page Error Error symptom symptom Content Content Page Page Remarks Remarks Check Check front front display display LED Check...
Page 53 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established A. Video error_No video/Normal audio A. Video error_No video/Normal audio 2012. 01.14 2012. 01.14 symptom symptom date date LCD TV LCD TV Revised Revised Content Content Check Back Light On with naked eye...
Page 54 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established A. Video error_No video/Normal audio A. Video error_No video/Normal audio 2012. 11 .17 2012. 11 .17 symptom symptom date date LCD TV LCD TV Revised Revised Content...
Page 55 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established A. Video error_No video/Normal audio A. Video error_No video/Normal audio 2012. 11 .17 2012. 11 .17 symptom symptom date date LCD TV LCD TV Revised Revised Content...
Page 56 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established A. Video error_No video/ Audio A. Video error_No video/ Audio 2012. 11 .17 2012. 11 .17 symptom symptom date date LCD TV LCD TV Revised Revised Content...
Page 57 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established A. Video error_Video error, video lag/stop A. Video error_Video error, video lag/stop 2012. 01 .14 2012. 01 .14 symptom symptom date date LCD TV LCD TV Revised Revised...
Page 58 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established A. Video error_Video error, video lag/stop A. Video error_Video error, video lag/stop 2012. 11 .17 2012. 11 .17 symptom symptom date date LCD TV LCD TV Revised Revised...
Page 59 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error A. Video A. Video error _Vertical/Horizontal bar, error _Vertical/Horizontal bar, Established Established 2012. 11 .17 2012. 11 .17 symptom symptom residual image, light spot residual image, light spot date date LCD TV...
Page 60 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established A. Video error_Color error A. Video error_Color error 2012. 01 .14 2012. 01 .14 symptom symptom date date LCD TV LCD TV Revised Revised Content Content A8/A9...
Page 61 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established A. Video error_Color error A. Video error_Color error 2012. 11 .17 2012. 11 .17 symptom symptom date date LCD TV LCD TV Revised Revised Adjustment Test pattern - ADJ Key Adjustment Test pattern - ADJ Key Content...
Page 62 Appendix : Exchange T-Con Board (1) Appendix : Exchange T-Con Board (1) Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken...
Page 63 Appendix : Exchange T-Con Board (2) Appendix : Exchange T-Con Board (2) Abnormal Power Section Abnormal Power Section Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack Abnormal Display Abnormal Display Fuse Open, Abnormal power section Fuse Open, Abnormal power section Solder defect, Short/Crack Solder defect, Short/Crack Noise...
Page 64 Appendix : Exchange Appendix : Exchange PSU(LED driver) PSU(LED driver) No Light No Light Dim Light Dim Light Dim Light Dim Light Dim Light Dim Light No picture/Sound Ok No picture/Sound Ok 29 / 97 29 / 97...
Page 65 Appendix : Exchange the Module (1) Appendix : Exchange the Module (1) Panel Mura, Light leakage Panel Mura, Light leakage Panel Mura, Light leakage Panel Mura, Light leakage Press damage Press damage Crosstalk Crosstalk Press damage Press damage Crosstalk Crosstalk Un-repairable Cases Un-repairable Cases In this case please...
Page 66 Appendix : Exchange the Module (2) Appendix : Exchange the Module (2) Vertical Line Vertical Line Vertical Block Vertical Block Vertical Block Vertical Block Source TAB IC Defect Source TAB IC Defect Source TAB IC Defect Source TAB IC Defect Source TAB IC Defect Source TAB IC Defect Horizontal Block...
Page 67 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established B. Power error _No power B. Power error _No power 2012. 11.17 2012. 11.17 symptom symptom date date LCD TV LCD TV Revised Revised Content Content Check front display LED...
Page 68 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established B. Power error _No power B. Power error _No power 2012. 11 .17 2012. 11 .17 symptom symptom date date LCD TV LCD TV Revised Revised Content...
Page 69 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established B. Power error _No power B. Power error _No power 2012. 11 .17 2012. 11 .17 symptom symptom date date LCD TV LCD TV Revised Revised Content...
Page 70 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established B. Power error B. Power error _Off when on, off whiling viewing _Off when on, off whiling viewing 2012. 11 .17 2012. 11 .17 symptom symptom date...
Page 71 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established C. Audio error_No audio/Normal video C. Audio error_No audio/Normal video 2012. 01 .14 2012. 01 .14 symptom symptom date date LCD TV LCD TV Revised Revised Content...
Page 72 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error Established Established C. Audio error_No audio/Normal video C. Audio error_No audio/Normal video 2012. 11 .17 2012. 11 .17 symptom symptom date date LCD TV LCD TV Revised Revised Voltage and speaker checking method...
Page 73 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Error Error D. Function error_ No response in remote D. Function error_ No response in remote controller, controller, Established Established 2012. 01 .14 2012. 01 .14 symptom symptom key error key error date...

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