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LG Electronics 22LT380C/380H-ZA - page 1
Printed in Korea P/NO : MFL67368124 (1208-REV00) CHASSIS : LD2A Y MODEL : 22L T380C/380H 22L T380C/380H-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. LED LCD TV SER VICE MANUAL North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com Internal Use ...
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LG Electronics 22LT380C/380H-ZA - page 2
- 2 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIO ...
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LG Electronics 22LT380C/380H-ZA - page 3
- 3 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 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 ...
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LG Electronics 22LT380C/380H-ZA - page 4
- 4 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SER VICING 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 ...
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LG Electronics 22LT380C/380H-ZA - page 5
- 5 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent at against the cir- cuit foil. When holes are the slotted type, the following technique shoul ...
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LG Electronics 22LT380C/380H-ZA - page 6
- 6 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SPECIFICA TION NOTE : Specifications and others are subject to change without notice for improvement . 1. Application range This specification is applied to the LCD TV used LD2A Y/Z chassis. 2. Requirement for T est Each part is ...
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LG Electronics 22LT380C/380H-ZA - page 7
- 7 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes No. Item Specication Remarks 6 RGB Input RGB-PC Analog(D-SUB 15PIN) 7 HDMI Input (3EA) HDMI1-DTV/DVI HDMI2-DTV HDMI3-DTV PC(HDMI version 1.3) Support HDCP The number of Input ports is different by model. 8 Audio Input (2EA) R ...
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LG Electronics 22LT380C/380H-ZA - page 8
- 8 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5. V ideo resolutions (2D) 5.1. Component Input (Y , C B /P B , C R /P R ) 5.2. RGB Input (PC) No. Resolution H-freq(kHz) V -freq(Hz) Pixel clock(MHz) Proposed 1 720*480 15.73 60.00 13.5135 SDTV ,DVD 480I 2 720*480 15.73 59.94 1 ...
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LG Electronics 22LT380C/380H-ZA - page 9
- 9 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5.3. HDMI Input(PC/DTV) No. Resolution H-freq(kHz) V -freq.(Hz) Pixel clock(MHz) Proposed Remark PC(DVI) DDC 1 640*350 31.468 70.09 25.17 EGA X 2 720*400 31.469 70.08 28.32 DOS O 3 640*480 31.469 59.94 25.17 VESA(VGA) O 4 800*60 ...
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LG Electronics 22LT380C/380H-ZA - page 10
- 10 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ADJUSTMENT INSTRUCTION 1. Application Range This specification sheet is applied to all of the LCD TV with LD2A Y/Z chassis. 2. Designation (1) The adjustment is according to the order which is designated and which must be follo ...
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LG Electronics 22LT380C/380H-ZA - page 11
- 1 1 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 3.1. ADC Process (1) ADC - Enter Service Mode by pushing "ADJ" key , - Enter Internal ADC mode by pushing "►" key at "7. ADC Calibration". < Ca u ti o n> Using "P-ONL Y" key of t ...
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LG Electronics 22LT380C/380H-ZA - page 12
- 12 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ▪ Auto adjustment Map(using RS-232C to USB cable) RS-232C COMMAND [CMD ID DA T A] Wb 00 00 White Balance Start Wb 00 ff White Balance End <Caution> Color T emperature : COOL, Medium, W arm. One of R Gain/G Gain/ B Gain ...
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LG Electronics 22LT380C/380H-ZA - page 13
- 13 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes (1) HD RGB EDID data (2) HD HDMI EDID data (3) Detail EDID Options are below a. Product ID b. Serial No: Controlled on production line. c. Month, Y ear: Controlled on production line: ex) Week : '01' -> '01&ap ...
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LG Electronics 22LT380C/380H-ZA - page 14
- 14 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5. Model name & Serial number D/L ▪ Press "Power on" key of service remote control. (Baud rate : 1 15200 bps) ▪ Connect RS232 Signal Cable to RS-232 Jack. ▪ Write Serial number by use RS-232. ▪ Must check ...
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LG Electronics 22LT380C/380H-ZA - page 15
- 15 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 6. CI+ Key Download method 6.1. Download Procedure (1) Press "Power on" key of a service R/C. (Baud rate : 1 15200 bps) (2) Connect RS232-C Signal Cable. (3) Write CI+ Key through RS-232-C. (4) Check whether the key w ...
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LG Electronics 22LT380C/380H-ZA - page 16
- 16 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes F - SC A RT IF_N/P_MSTA R NAND F lash (NTP7 0 00) Pb SC1_CVBS/R/G/B/FB_IN I2S Tuner PCM_A [0: 7] TU_CVBS PCM_A [0: 7] DDR3 (1GB) IC1202 B_TMDQ[0:16] USB Power SC1_L/R_IN, E_A M_AUDIO , AV_L/R_IN, COMP_L/R_IN, PC_L/R_IN Head Pho ...
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LG Electronics 22LT380C/380H-ZA - page 17
- 17 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes A2 A9 A31 A10 * Set + Stand * Stand Base + Body 900 200 400 540 521 820 910 120 300 510 501 500 L V1 EXPLODED VIEW Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts ar ...
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LG Electronics 22LT380C/380H-ZA - page 18
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. /PCM_IOWR 8pF OPT C106 /PCM_CD /PCM_WE 22 R111 5V_DET_HDMI ...
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LG Electronics 22LT380C/380H-ZA - page 19
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. D1-_HDMI2 0.1uF C252 +1.10V_VDDC 0.047uF C209 33 R257 0.04 ...
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LG Electronics 22LT380C/380H-ZA - page 20
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. 4.7K R383 AMP_MUTE NEC_RX 22 R397 EXT5V_CTRL 10K R381 FLMD ...
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LG Electronics 22LT380C/380H-ZA - page 21
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. +3.5V_ST 0.1uF C451 OPT 100K R404 PD_+24V 10K R430 OPT 0.1 ...
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LG Electronics 22LT380C/380H-ZA - page 22
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. 390pF 50V C533 10K R521 33pF 50V C509 1000pF 50V C505 1000 ...
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LG Electronics 22LT380C/380H-ZA - page 23
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. 1000pF 50V C603 +3.5V_ST 100 R613 +3.5V_ST LED_R/BUZZ 0.1u ...
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LG Electronics 22LT380C/380H-ZA - page 24
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. RXA1+ RXA1- 0 OPT R713 RXA0- 3.3K OPT R705 RXB3- RXA3+ RXB ...
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LG Electronics 22LT380C/380H-ZA - page 25
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. 2.7K R888 HDMI_1 DDC_SCL_2 5V_DET_HDMI_4 D804 OPT DDC_SDA_ ...
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LG Electronics 22LT380C/380H-ZA - page 26
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. 0.1uF C1005 UART_RX 0.1uF C1002 0.33uF C1000 0.1uF C1003 + ...
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LG Electronics 22LT380C/380H-ZA - page 27
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. 100pF 50V C1108 10K R1104 OPT 1K R1125 HEAD_PHONE RGB_DDC_ ...
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LG Electronics 22LT380C/380H-ZA - page 28
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. A-MDMU B-MDQL2 B-MDQU2 B-MA10 B-MBA1 A-MWEB 0.1uF C1243 0. ...
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LG Electronics 22LT380C/380H-ZA - page 29
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. SPI_SCK +3.5V_ST KRC103S Q1300 OPT E B C +3.5V_ST 0.1uF C1 ...
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LG Electronics 22LT380C/380H-ZA - page 30
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. 0.1uF 16V C1419 100pF 50V C1406 IF_AGC_MAIN 100 R1402 0 R1 ...
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LG Electronics 22LT380C/380H-ZA - page 31
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. 4.7K R1527 OPT 4.7uF 16V C1510 PI_LG1001 PI_TS_DATA[7] 1K ...
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LG Electronics 22LT380C/380H-ZA - page 32
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. 33pF EXT_SPK C1614 1K R1666 AV2 SC1/COMP1_L_IN 15K EU_OPT ...
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LG Electronics 22LT380C/380H-ZA - page 33
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. 1uF 25V EXT_SPK C1709 +5V_SUB_AMP EXT_SPK_DET EXT_SPK_R- E ...
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LG Electronics 22LT380C/380H-ZA - page 34
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. M41T83RMY6F IC1801 3 NF_2 2 NF_1 4 NC_2 1 NC_1 6 DU 5 RST ...
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LG Electronics 22LT380C/380H-ZA - page 35
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. 0.1uF 16V C1907 +5V_Normal BLM18PG121SN1D L1902 CI_MCLKI 0 ...
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LG Electronics 22LT380C/380H-ZA - page 36
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. MDL61930001 DO_NOT_APPLY GAS5 MDL61930001 GAS3 DO_NOT_APPL ...
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LG Electronics 22LT380C/380H-ZA - page 37
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LG Electronics 22LT380C/380H-ZA - page 38
Contents of LCD TV Standard Repair Process No. Error symptom (High ca tegory) Error symptom (Mid c ategory) Page Remarks 1 A. Video error No video/Normal audio 1 2 No video/No audio 2 3 Video error, video lag/stop 3 4 Color error 4 5 Vertical/Horizontal ba r, residual i mage, light spot, external d evice color error 5 6 B. Power error No power 6 7 ...
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LG Electronics 22LT380C/380H-ZA - page 39
Normal audio Y N Move to No video/No audio No video Normal audio Check Back Light On with naked ey e On Y N Check Main Board 3.5V,12V,3.3V, 1.26V, 1.5V etc. Normal voltage Y N Replace T-con Board or module Repair Power Board or parts Check Power Board 24V,12V,3.5V output Normal voltage Y Replace Inverter or module N Repair Power Board or parts End ...
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LG Electronics 22LT380C/380H-ZA - page 40
Normal voltage? Check various voltages of Power Board ( 3.5V,12V,20V or 24V…) 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 ☞ A4 Establis hed date Revised date 2/13 LCD TV Error symptom 2 Copyright © 2012 LG Electronics. Inc. All rights reser ...
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LG Electronics 22LT380C/380H-ZA - page 41
A. Picture Problem Picture bro k en/ Freezing Y N N Check R F Signal le vel Normal Signal? Check RF Cable Connection 1. Reconnec tion Check S/W Version S/W Upgrade Check w hether other e quipments have probl e m or not. (By connecting RF Cabl e at other equipment) → DVD Play er ,S et-Top-Box, Different maker TV etc` SVC Bulletin? Repla ce Main B/ ...
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LG Electronics 22LT380C/380H-ZA - page 42
Color error? Y N ※ Check and replace Link Cable (LVDS) and contact condition Y N Replace Main B/D Color error? Check error color input mode Check color by input -External Input -COMPONENT - RGB - HDMI/DVI Y External device /Cable normal External Input/ Component error Check external device and cable Y External device /Cable normal RGB/ HDMI/DVI e ...
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LG Electronics 22LT380C/380H-ZA - page 43
Screen normal? N Y Check external device connection condition Y N Check and replace Link Cable Normal? Y N Screen normal? Replace Main B/D Replace module Check color condi tion by input -External Input -Component - RGB - HDMI/DVI End Vertical/Horizontal bar, r esidual image, light spot Request repair for external device A. Video error Vertica l / H ...
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LG Electronics 22LT380C/380H-ZA - page 44
B. Power error No power Power LED On? Y N DC Power on by pressing Power Key On Remote control Y N Normal operation? Check Power On ‘”High” Check Power cord was inserted properly Check Power LED Replace Power B/D Measure voltage of each o u tpu t of Power B/D N Y Normal voltage? Replace Main B/D N Y OK? Replace Main B/D N Y Normal? Check ST-BY ...
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LG Electronics 22LT380C/380H-ZA - page 45
B. Power error Off when on, off w hile vi ewing, power auto on/off Error? N Y Check Power Off Starus(instart menu Fix A/C cord & Outlet and check each 3 phase out Check A/C cord Check for all 3- phase power out Check outlet Replace Main B/D CPU Abnormal (If Power Off mode is not display ed) Check Power B/D vol t ag e Y N Replace Main B/D Normal ...
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LG Electronics 22LT380C/380H-ZA - page 46
No audio Screen normal Check user menu > Speaker off Off N Y Cancel OFF Check audio B+ 20V or 24V of Power Board Normal vol t ag e 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 v id eo ☞ A24 ☞ A25 Disconnection Establis hed date Revis e d date 8 ...
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LG Electronics 22LT380C/380H-ZA - page 47
→ abnormal audio/di sconti nuation/n oise is same af ter “Check input signal” compared to No audio C. Audio error Wrecked audi o/ disco ntinu ation /noise Wrecked audio/ Discontinuation/ Noise for all audio Check and replace speaker and connector Wrecked audio/ Discontinuation/ Noise only for D-TV Wrecked audio/ Discontinuation/ Noise only fo ...
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LG Electronics 22LT380C/380H-ZA - page 48
D. General Function Problem Remote co ntrol & Local sw itch checking Y N 1. Remote control(R/C) op erating error Check R/C itself Operation Norm al operating? Normal operating? Y Close Replace R/ C If R/C operate, Explain th e customer cause is inter ference from light in room. Check R/C Operat ing When turn off light in room Check & Replac ...
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LG Electronics 22LT380C/380H-ZA - page 49
Check technical informatio n - Fix information - S/W Version N Y Technical information? Check input signal Signal input? Y N External Input and Component Recognition error Check and fix externa l devic e/cable RGB,HDMI/ DVI, Optical Recognition error Replace Main B/D Replace Main B/D Fix in accordance with technical information D. Function error Ex ...
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LG Electronics 22LT380C/380H-ZA - page 50
Check location of noise Identify nose type Circuit noise Replace PSU(with LED dri ver) Replac e L E D driv er Mechanic al noise Check location of noise OR ※ When the nose is severe, rep lace the module (For mode ls with fix infor mation, upgrade the S/W or provide th e d es cript ion) OR ※ If there is a “Tak Tak ” noise from the cabinet, re ...
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LG Electronics 22LT380C/380H-ZA - page 51
Replace module Zoom par t with exter ior damage Module damage Cabinet damage Replace cabinet Replace remot e controller Remote controller damage Stand dent Replace stand F. Exterior defect Exterior defect Establis hed date Revis e d date 13/13 LCD TV Error symptom Standard Repair Process 13 Copyright © 2012 LG Electronics. Inc. All rights reserved ...
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LG Electronics 22LT380C/380H-ZA - page 52
MENU - Æ red key(customer support - Æ signal test - Æ select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Standard Repair Process Detail Technical Manual TUNER input s ignal strengt h checking me thod A. Video error_Video error, video lag/stop <ALL MODELS> A6 Established date Revis ed date Error symptom ...
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LG Electronics 22LT380C/380H-ZA - page 53
Standard Repair Process Detail Technical Manual LCD-TV Version ch ecking method A. Video error_Video error, video lag/stop 1. Checking method for remote controller for adjustment Press the IN-START with the remote controll er for adjustment Version <ALL MODELS> A7 Established date Revis ed date Error symptom Content LCD TV A7 Copyright © 201 ...
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LG Electronics 22LT380C/380H-ZA - page 54
Standard Repair Process Detail Technical Manual Adjustment Test p atte rn - ADJ Key A. Video error_Color error You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Resid ual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classificati on of MODULE or Main-B/D!) A12 Established date Revis ed date Error s ...
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LG Electronics 22LT380C/380H-ZA - page 55
Solder defe ct, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken Solder defe ct, CNT Broken Solder defect, CNT Broke n Solder defe ct, CNT Broken Solder defe ct, CNT Broken Abnormal Power Section Solder defe ct, Short/Crack Abnormal Power Section Solder defe ct, Short/Crack Appendix : Exchange T-Con Board (1) A ...
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LG Electronics 22LT380C/380H-ZA - page 56
Abnormal Power Section Solder defe ct, Short/Crack Abnormal Power Section Solder defe ct, Short/Crack Fuse Open, Abnormal power section Noise GRADATION GRADAT ION Abnormal Display Appendix : Exchange T-Con Board (2) A - 2/5 Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...
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LG Electronics 22LT380C/380H-ZA - page 57
Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok A - 3/5 Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...
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LG Electronics 22LT380C/380H-ZA - page 58
Appendix : Exchange the Module (1) Panel Mura, Li ght leakage Press damage Crosstalk Crosstalk Press damage Panel Mura, Li ght leakage Press damage A - 4/5 Un-repairable Cases In this case please exchange the module. Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...
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LG Electronics 22LT380C/380H-ZA - page 59
Vertical Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Vertical 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 ...
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LG Electronics 22LT380C/380H-ZA - page 60
Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking m ethod B. Power error _Off when on, off whi ling viewing <ALL MODELS> A22 Established date Revis ed date Error symptom Content LCD TV A22 Copyright ...
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LG Electronics 22LT380C/380H-ZA - page 61
Checking metho d 1. Press the MENU button on the remote controller 2. Select the AUDIO function of th e Menu 3. Select TV Speaker from Off to On Standard Repair Process Detail Technical Manual Checking method in menu w hen there is no audio C. Audio error_No audio/Normal video <ALL MODELS> A24 Established date Revis ed date Error symptom Cont ...
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