Internal Use Only North/Latin America Europe/Africa Asia/Oceania http://aic.lgservice.com http://eic.lgservice.com http://biz.lgservice.com LED LCD TV SERVICE MANUAL CHASSIS : LD21A MODEL: 26LS3500/350S/350T/3510 26LS3500/350S/350T-ZA 26LS3510-ZB 26LS3590/359S/359T CAUTION 26LS3590/359S/359T-ZC BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS CONTENTS . ............................................................................................. 2 SAFETY PRECAUTIONS ......................................................................... 3 SERVICING PRECAUTIONS ................................................................... 4 SPECIFICATION ....................................................................................... 6 ADJUSTMENT INSTRUCTION ................................................................
SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Exploded View. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.
SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First. General Servicing Precautions 1.
IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above. 3. Solder the connections.
SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to the LCD TV used LD21A chassis. 3. Test method 2. Requirement for Test 1) Performance: LGE TV test method followed 2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC Each part is tested as below without special appointment.
No.
5. Video resolutions (2D) 5.1. Component Input (Y, CB/PB, CR/PR) No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed 1 720*576 15.625 50.00 13.5 SDTV ,DVD 576I 2 720*480 15.73 60.00 13.5135 SDTV ,DVD 480I 3 720*480 15.73 59.94 13.50 SDTV ,DVD 480I 4 720*576 31.25 50.00 27.00 SDTV 576P 5 720*480 31.50 60.00 27.027 SDTV 480P 6 720*480 31.47 59.94 27.00 SDTV 480P 7 1280*720 37.50 50.00 74.25 HDTV 720P 8 1280*720 45.00 60.00 74.
5.3. HDMI Input(PC/DTV) No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed PC(DVI) 1 Remark DDC 640*350 31.468 70.09 2 720*400 31.469 70.08 3 640*480 31.469 59.94 25.17 EGA X 28.32 DOS O 25.17 VESA(VGA) O 4 800*600 37.879 60.31 40.00 VESA(SVGA) O 5 1024*768 48.363 60.00 65.00 VESA(XGA) O 6 1152*864 54.348 60.053 80.00 VESA O 7 1360*768 47.712 60.015 85.50 VESA (WXGA) O 8 1280*1024 63.981 60.020 108.
ADJUSTMENT INSTRUCTION 1. Application Range (4) Click "Connect" tab. If "Can't" is displayed, check connection between computer, jig, and set. This specification sheet is applied to all of the LCD TV with LD21A chassis. (2) (3) 2. Designation (1) The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing. (2) Power adjustment : Free Voltage. (3) Magnetic Field Condition: Nil.
3.1. ADC Process (1) ADC - Enter Service Mode by pushing "ADJ" key, - Enter Internal ADC mode by pushing "►" key at "7. ADC Calibration". EZ ADJUST 3.3. EDID data ADC Calibration 0. Tool Option1 ADC Comp 480i NG 1. Tool Option2 ADC Comp 1080p NG 2. Tool Option3 ADC RGB NG 3. Tool Option4 4.
3.4 Function Check * Connecting picture of the measuring instrument (On Automatic control) Inside PATTERN is used when W/B is controlled. Connect to auto controller or push Adjustment R/C POWER ON -> Enter the mode of White-Balance, the pattern will come out. - Check display and sound ■ Check Input and Signal items.
* Manual W/B process using adjust Remote control. ▪ After enter Service Mode by pushing "ADJ" key, ▪ E nter White Balance by pushing " ► " key at "8. White Balance". White Balance EZ ADJUST 0. Tool Option1 1. Tool Option2 2. Tool Option3 3. Tool Option4 4. Tool Option5 5. Country Group 6. Area Option 7. ADC Calibration 8. White Balance 9. 10 Point WB 10. Test Pattern 11. EDID D/L 12. Sub B/C 13. Touch Sensitivity Setting ► Color Temp.
6.3. Method & notice (1) Serial number D/L is using of scan equipment. (2) S etting of scan equipment operated by Manufacturing Technology Group. (3) Serial number D/L must be conformed when it is produced in production line, because serial number D/L is mandatory by D-book 4.0. * Manual Download(Model Name and Serial Number) If the TV set is downloaded by OTA or Service man, sometimes model name or serial number is initialized.
7.2 LAN Inspection 7.2.1. Equipment & Condition ▪ Each other connection to LAN Port of IP Hub and Jig 7.2.1. LAN inspection solution ▪ LAN Port connection with PCB ▪ Network setting at MENU Mode of TV ▪ Setting automatic IP ▪ Setting state confirmation -> If automatic setting is finished, you confirm IP and MAC Address. 7.3. LAN PORT INSPECTION(PING TEST) Connect SET -> LAN port == PC -> LAN Port SET PC 7.3.1. Equipment setting (1) Play the LAN Port Test PROGRAM.
Rear Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes - 16 - Side ETHERNET(T2 Only) FULL SCART Component/AV COMMON HDMI1/2(DVI) SIF TMDS DP/DM TP/TN/RP/RN SC1_R/G/B SC1_CVBS_IN FE_ VOUT CVBS, Y/Pb/Pr, L/R TU_CVBS IF +/ - USB1(2.
EXPLODED VIEW IMPORTANT SAFETY NOTICE * Set + Stand A10 510 A2 300 A21 A31 A5 120 310 200 810 540 LV1 521 900 910 400 Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and EXPLODED VIEW. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
LED Driver Circuit for TN Module DMB IC +24V_LED_driver +12V/+15V CMI_21.6 L59001 CIS21J121 ILED = 1240/RISET CMI_18.51_HD 65mA_Typ 70mA_Max R59002 R59003 LED_DRIVER R59006 100 Remark CMI_21.6_HD THTF_21.6_HD 65mA_Typ 70mA_Max mA_Typ mA_Max 620Kohm 39Kohm 67.06mA 620Kohm 39Kohm 67.
R1227 L1202 CIC21J501NE 1uF 0.1uF C1220 1uF C1241 1uF C1238 1uF C1219 1uF C1218 C1217 0.1uF 0.1uF C1239 10uF C1206 OPT C1251 OS 1K 1% 0.1uF C1250 OS 1% 1K C1249 OS OS 1000pF R1225 0.1uF C1247 C1248 OS 1K 1% CLose to Saturn7M IC AVDD_DDR0 +1.5V_DDR R1228 R1224 OS 1K 1% CLose to Saturn7M IC CLose to DDR3 AVDD_DDR0 B-MVREFDQ B-MVREFCA OS A-MVREFCA OS 1000pF 1000pF C1204 1% 1K C1203 R1205 0.1uF A-MVREFDQ 1000pF 0.
Serial Flash for SPI boot +3.5V_ST +3.5V_ST S_FLASH_MAIN_MACRONIX OPT R1404 4.7K +3.5V_ST IC1401 MX25L8006EM2I-12G CS# /SPI_CS OPT R1403 10K SO/SIO1 SPI_SDO WP# /FLASH_WP OPT R1401 0 GND C 1 8 2 7 3 6 4 5 OS C1401 0.
* Option name of this page : CI_SLOT (because of Hong Kong) CI Region CI SLOT +5V_CI_ON CI_DATA[0-7] CI TS INPUT EAG41860102 P1901 P1902 10067972-050LF 10067972-000LF C1903 0.
ETHERNET * H/W option : ETHERNET +2.5V_Normal ETHERNET L3707 BLM18PG121SN1D JK2100 BS-R430051 XRJV-01V-0-D12-080 ETHERNET_UDE 1 2 3 4 5 6 7 8 1 2 3 4 ETHERNET_XMULTIPLE JK2100-*1 1 2 3 EPHY_TN 4 5 EPHY_RP OPT D2103 5.5V ADLC 5S 02 015 5 6 6 7 OPT D2104 5.5V ADLC 5S 02 015 EPHY_RN OPT D2101 5.5V ADLC 5S 02 015 7 8 9 EPHY_TP OPT D2105 5.5V ADLC 5S 02 015 8 9 9 9 ETHERNET C2104 0.
IR/LED and control for on.y ’12 sub without IR-OUT. +3.5V_ST R2411 100 SENSOR_SCL R2405 10K 1% R2404 10K 1% R2401 100 12507WR-10L D2403 5.48VTO5.76V L2401 BLM18PG121SN1D 1 KEY1 AMOTECH CO., LTD. OPT D2402 5.6V L2402 BLM18PG121SN1D R2402 100 P2400 OPT C2408 18pF 50V KEY2 C2401 0.1uF R2412 100 2 SENSOR_SDA OPT C2409 18pF 50V C2402 0.1uF OPT D2401 5.6V AMOTECH CO., LTD. +3.5V_ST D2404 5.48VTO5.76V 3 JP2407 4 JP2408 5 L2403 BLM18PG121SN1D 6 LED_B/LG_LOGO C2403 0.
GP4R_GLOBAL_TUNER_BLOCK OPT IC2601 74LVC1G08GW ERROR & VALID PIN RF_SW_OPT R2603 0 OPT R2627 0 FE_TS_VAL 1 +3.3V_TU 5 OPT C2640 0.1uF 16V RF_SWITCH_CTL RF_SW_OPT C2603 0.1uF 16V +3.3V_TU FE_TS_ERR 2 Close to TUNER 3 TU_T/C TU_T2/C TU2602 TDSS-G101D 1 2 3 4 5 6 7 8 9 10 11 TU_T/C/S2 TU2603 TDSN-G301D NC 1 RESET 2 SCL 3 SDA 4 +3.3V 5 SIF 6 +1.8V 7 CVBS 8 IF_AGC 9 DIF[P] 10 DIF[N] 11 NC_1 1 RESET 2 SCL 3 SDA 4 +B1[3.3V] 5 SIF 6 +B2[1.
DVB-S2 LNB Part Allegro (Option:LNB) LNB D2702 40V SX34 LNB ZD1 40V 3A 2A LNB C2701 0.01uF 50V LNB C2713 1uF 50V LNB C2705 68uF 35V LNB C2707 68uF 35V +12V_LNB LNB L2700 33UH SP-7850_33 2.4A close to Boost pin(#1) DCDC_GND LNB C2712 0.
LVDS_SMALL RXA4+ RXA4- RXB4+ RXB4- RXB3+ RXB3- [30Pin LVDS Connector] (For HD_Small) RXBCK+ PANEL_VCC RXBCK- HD_SMALL P3102 HD_SMALL L3102 70-ohm FF10001-30 RXB2+ 1 RXB2- 2 OPT C3107 1000pF 50V 3 4 HD_SMALL C3108 0.1uF 16V RXB1+ [30Pin LVDS Connector] (For HD_LARGE) RXB1- 5 HD_LARGE CMI_18.
+12V/+15V +5V_Normal SMAW200-12 2 3 4 5 6 +15V PANEL_POWER JPD003N-M432-4F NON_Adapter L3300 CIS21J121 Adapter L3308 CIS21J121 Adapter L3304 CIS21J121 24V 12V_PANEL +5V_PANEL R3345 R3345-*1 22K 33K +3.5V_ST NON_Adapter C3303 0.1uF 16V OPT C3300 0.1uF 16V SW Adapter C3316 0.1uF 50V GND +3.5V_ST C3317 0.1uF 50V OPT R3338 22K C3320 68uF 35V 7 8 9 10 11 12 G LIPS C3362 0.1uF 16V R3356-*1 4.7K PANEL_DISCHARGE_RES_4.7K PANEL_DISCHARGE_RES_4.
AUDIO AMP(STA380BWE) +24V_AMP +24V C3403 0.1uF 16V 13 NC_1 14 NC_2 15 NC_3 16 NC_4 17 NC_5 18 NC_6 19 NC_7 20 NC_8 L3402 10.0uH 21 NC_9 C3402 0.1uF 50V C3400 0.1uF 50V 22 NC_10 +3.3V_AMP 23 NC_11 24 NC_12 L3400 CIS21J121 NC_13 25 12 GND_REG NC_14 26 11 VDD_REG NC_15 27 10 OUT1A VDDDIG1 28 9 GND1 GNDDIG1 29 8 VCC1 IC3400 STA380BW FFX3B 31 +3.3V_AMP EAPD/FFX4A 32 C3404 2.
IC102 NAND01GW3B2CN6E +3.3V_Normal CL /PF_CE1 OPT R104 10K AL PF_ALE W /PF_WE WP OS B 3.3K OS R102 /PF_WP E NC_11 R106 1K C NC_12 OPT Q101 MMBT3904(NXP) NC_13 NC_14 NC_15 14 35 15 34 16 33 17 32 18 31 19 30 20 29 21 28 22 27 NC_22 NC_20 I/O3 1K 1K LED_R/BUZZ OS AR102 22 NC_21 OPT OS C103 0.
MODEL OPTION PIN NAME FHD HD MODEL_OPT_1 F4 PHM_OFF PHM_ON +1.10V_VDDC VDDC 1.05V NON_120HZ 120HZ A8 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF OPT OPT C4024 B8 MODEL_OPT_7 OPT C4019 MODEL_OPT_6 OPT C4013 DVB_S OPT C4011 OLED NON_DVB_S OPT C299 NON_OLED T24 OPT C4006 U23 C292 MODEL_OPT_4 MODEL_OPT_5 OPT 1uF 3D C283 NON_3D C280 NON_DVB_T2 DVB_T2 10uF T25 1uF AB2 MODEL_OPT_3 C276 MODEL_OPT_2 MODEL_OPT_1 MODEL_OPT_2 +1.
USB (SIDE) USB1_DIODES EAN61849601 IC1450 AP2191DSG L1451-*1 MLB-201209-0120P-N2 120-ohm NC L1451 CIS21J121 OPT R1458 2K 1/8W 5% OPT R1459 2K 1/8W 5% C1451 22uF 16V OUT_2 OUT_1 FLG 8 1 $0.0665 7 2 6 3 5 4 GND +5V_USB IN_1 IN_2 EN C1452 10uF 10V C1453 0.1uF +3.3V_Normal OPT R1455 4.7K USB1_CTL R1451 47 2 SIDE_USB1_DM 3 1 USB1_OCD SIDE_USB1_DP 4 5 2 3 4 5 Copyright © 2012 LG Electronics. Inc. All rights reserved.
HDMI_2EA(NON SIDE HDMI) 5V_HDMI_1 5V_DET_HDMI_1 +5V_Normal R804 1.8K Q802 2SC3052 B A1 A2 HDMI_2 D822 MMBD6100 R830 10K HPD1 E R802 3.3K 17 D821 MMBD6100 R884 R888 2.7K 2.7K DDC_SDA_1 16 R885 R889 2.7K 2.7K HDMI_2 C NON_CI_CAP C802 0.
COMPONENT R2831 10K COMP2_R_IN OPT D2816 5.6V R2826 470K OPT C2811 1000pF 50V R2825 470K OPT C2810 1000pF 50V R2833 12K R2832 10K COMP2_L_IN OPT D2815 5.6V JK2803 PPJ234-05 6E [RD]E-LUG 5E [RD]O-SPRING_2 4E [RD]CONTACT_2 5D [WH]O-SPRING R2834 12K +3.3V_Normal 4C [RD]CONTACT_1 5C [RD]O-SPRING_1 7C [RD]E-LUG-S 5B [BL]O-SPRING 7B [BL]E-LUG-S 4A [GN]CONTACT 5A [GN]O-SPRING 6A [GN]E-LUG R2841 10K R2842 1K COMP2_DET OPT D2818 5.
RS-232C 4PIN P1000 +3.5V_ST 12507WS-04L VCC PM_RXD PM_RXD GND PM_TXD PM_TXD 1 2 3 4 5 GND THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved.
MSTART DEBUG_4PIN P1 12505WS-04A00 1 MSTAR_DEBUG_4P 2 3 RGB_DDC_SCL 4 RGB_DDC_SDA 5 THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved.
Contents of LCD TV Standard Repair Process No. Error symptom (High category) Error symptom (Mid category) Page 1 No video/Normal audio 1 2 No video/No audio 2 3 A.
Contents of LCD TV Standard Repair Process Detail Technical Manual No.
Standard Repair Process Error symptom LCD TV A. Video error Established date No video/ Normal audio Revised date 2012. 01 .14 1/14 First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) ☞A1 No video Normal audio Normal audio Y ☞A4 Check Back Light On with naked eye N Move to No video/No audio Y On Check Power Board 12v,3.5v etc.
Standard Repair Process LCD TV Error symptom A. Video error Established date No video/ No audio Revised date 2012 . 01 .14 2/14 ☞A4 No Video/ No audio Check various voltages of Power Board ( 3.5V,12V,20V or 24V…) Normal voltage? N Y Check and replace MAIN B/D End Replace Power Board and repair parts Copyright © 2012 LG Electronics. Inc. All rights reserved.
Standard Repair Process Error symptom LCD TV ☞ A5 Check RF Signal level Normal Signal? Y A. Video error Established date Picture broken/ Freezing Revised date 2012. 01 .14 3/14 . By using Digital signal level meter . By using Diagnostics menu on OSD ( Menu→ Set up→ Support → Signal Test ) - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%) Check whether other equipments have problem or not.
Standard Repair Process Error symptom LCD TV ☞ A5 Check RF Signal level Normal Signal? N A. Video error Established date Tuning fail, Picture broken/ Freezing Revised date 2012. 01 .14 4/14 Check RF signal cable (DVB satellite signal or not) Check whether other equipments have problem or not. (By connecting RF Cable at other equipment) → Set-Top-Box, Different maker TV etc Check satellite setting. - Check LNB frequency.
Standard Repair Process LCD TV Error symptom ☞A7 Check color by input -External Input -COMPONENT -RGB -HDMI/DVI A. Video error Established date Color error Revised date 2012. 01 .
Standard Repair Process LCD TV Error symptom A. Video error Established date Vertical / Horizontal bar, residual image, light spot, external device color error Revised date 2012. 01 .
Standard Repair Process LCD TV Error symptom B. Power error Established date No power Revised date ☞A11 Check Power LED . Stand-By: Red 2012. 01 .14 7/14 ☞A13 DC Power on by pressing Power Key On Remote control Y Power LED On? N Normal N operation? Check Power On ‘”High” OK? Y Replace Power B/D N Y Check Power cord was inserted properly Replace Main B/D ☞A4 Measure voltage of each output of Power B/D N Normal? Y Close Y ※ Check ST-BY 3.
Standard Repair Process LCD TV Error symptom B. Power error Established date Off when on, off while viewing, power auto on/off Revised date 2012. 01 .
Standard Repair Process LCD TV Error symptom C. Audio error Established date No audio/ Normal video Revised date ☞A15 No audio Screen normal Check user menu > Speaker off 2012. 01 .14 9/14 ☞A16 N Off Check audio B+ 24V of Power Board Normal voltage Y Cancel OFF Check Speaker disconnection Y N Replace Power Board and repair parts N Disconnection Replace MAIN Board End Y Replace Speaker Copyright © 2012 LG Electronics. Inc. All rights reserved.
Standard Repair Process LCD TV Error symptom C. Audio error Established date Wrecked audio/ discontinuation/noise Revised date 2012. 01 .
Standard Repair Process Error symptom LCD TV D. Function error Established date Remote control & Local switch checking Revised date 2012. 01 .14 11/14 1. Remote control(R/C) operating error ☞A17 Check R/C itself Operation Normal Y operating? ☞A17 Check & Repair Cable connection Connector solder N Normal operating? Y Check R/C Operating When turn off light in room Check & Replace Baterry of R/C If R/C operate, Explain the customer cause is interference from light in room.
Standard Repair Process LCD TV Check input signal Error symptom Y Signal input? N Established date External device recognition error Revised date Check technical information - Fix information - S/W Version Check and fix external device/cable Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes D. Function error Technical information? N 2012. 01 .
Standard Repair Process LCD TV Identify nose type Error symptom Circuit noise Mechanical noise E. Noise Established date Circuit noise, mechanical noise Revised date Check location of noise 13/14 Replace PSU (with LED driver) OR Replace LED driver Check location of noise ※ Mechanical noise is a natural phenomenon, and apply the 1st level description. When the customer does not agree, apply the process by stage.
Standard Repair Process LCD TV F. Exterior defect Error symptom Zoom part with exterior damage Exterior defect Module damage Replace module Cabinet damage Replace cabinet Remote controller damage Stand dent Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes Established date Revised date 2012. 01 .
