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LG M4224C Service Manual

Lcd monitor tv
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LCD MONITOR TV
SERVICE MANUAL
CHASSIS : LW81B
MODEL : M4224C
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
North/Latin America
Europe/Africa
Asia/Oceania
M4224C-BAG/BAPG
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com

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  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD MONITOR TV SERVICE MANUAL CHASSIS : LW81B MODEL : M4224C M4224C-BAG/BAPG CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    ADJUSTMENT INSTRUCTION ...............14 BLOCK DIAGRAM...................19 DESCRIPION OF BLOCK DIAGRAM .............20 TROUBLE SHOOTING ................21 EXPLODED VIEW .................. 28 SVC. SHEET ....................2008 Copyright LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Precautions

    CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. 2008 Copyright LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
  • Page 4 8. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last. 2008 Copyright LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 IC. replaced component and adjacent components and the circuit board to prevent excessive component temperatures. 2008 Copyright LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
  • Page 6 Circuit Board Foil Repair Use the following technique to repair the defective copper Excessive heat applied to the copper foil of any printed pattern at connections other than IC Pins. This technique circuit board will weaken the adhesive that bonds the foil involves the installation of a jumper wire on the to the circuit board causing the foil to separate from or component side of the circuit board.

  • Page 7: Specification

    956.4(H)x 549 .4(V)x 53.5(D) Surface Treat ment Anti-Glare, Hard Coating (3H) Operating Mode No rmally Black, Back light Unit 20 CCFL 9ms(GTG) Copyright 2008 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 V p-p 600 Ω Audio Level AV, Component Input:0.50 V rms PC Input : 0.70 Video Cross Talk 43 dB 2008 Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 Condition Humidity 10% ~ 80% Storage Temperature -20 °C ~ 60 °C non condensing Humidity 5% ~ 95% non-condensing Copyright 2008 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 Picture mode : User1 WHITE 0.270 0.285 0.300 (Medium) 0.278 0.293 0.308 WHITE 0.298 0.313 0.328 (Warm) 0.314 0.329 0.344 Copyright 2008 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 • 6500K : Color Temperature Setting is 6500 K( if it’s not special specification) • Clock/Clock Phase : The Best Setting * Another Spec.: Product Specification Standard( LG(55)G1-1034 ) * Cosmetic Spec. : LCD Module IIS Spec. 8.4 Display Area 8.4.1 Active Display Area of the LCD Monitor Should be within Cabinet’s Bezel .

  • Page 12: Timing Chart

    65.290 2240 1680 1680 x1050 V(Lines) 59.954 1089 1050 H(Pixels) 148.5 67.5 2200 1920 1920 x1080 V(Lines) 1125 1080 2008 Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 50.00 HDTV 576p 720/50P 37.5 HDTV 720p 1080/50i 28.1 HDTV 1080i 50Hz (only AU) 1080/60P 67.5 HDTV 1080P 60Hz Copyright 2008 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...

  • Page 14: Adjustment Instruction

    4.1 S/W program download 4.1.1 Preliminary steps (1) Download method 1 (PCB Assy) (2) Connect the download jig to D-sub jack 2008 Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 Input the PC 1920x1080 @ 60Hz 1/2 Black & White • Pattern (MSPG-925F model:126, pattern:54) into RGB. Adjust by commanding AUTO_COLOR_ADJUST(0xF1) • 0x00 0x02 instruction. 2008 Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 -> ping 192.168.0.10 –t * Ping test result Æ Fail state Download Command execution on Dos window. • -> tftp 192.168.0.10 put “filename” ex) tftp 192.168.0.10 put "C:\M4224C\IC129\M4224C_ IC129_PIC18F66J60_V2.00_089A_20081028_Dow 5.2. Data of EDID nload.hex" (1) DDC data of Analog-RGB * Ping test result Æ Success Confirm LAN S/W version •...
  • Page 17 Warm 0.313±0.002 0.329±0.002 6,500K 0.003 - Check DDC adjust mode release by exit key and release DDC adjust mode) 2008 Copyright LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 • FOS Default write 16-mode data (HFh,HFl,VF,STD,HP,VP,Clk,ClkPh,PhFine) write • Random Data write : write the appointment Address of E2PROM 2008 Copyright LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...

  • Page 19: Block Diagram

    BLOCK DIAGRAM 2008 Copyright LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...

  • Page 20: Descripion Of Block Diagram

    8. LAN Conrtrol Block (1) IC129 PIC18F66J60 compose LAN control circuit by processing the input from JK113 RJ-45 with X102 25MHz. 2008 Copyright LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...

  • Page 21: Trouble Shooting

    (14.31818MHz) ? NO(Low) CHECK IC118 CHECK RESET IC (HW_RESET) ? YES(High) 1. Check IC120 2. Check all Vcc of IC120 2008 Copyright LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 T-CON VOLTAGE BOARD (12V) CHECK CHECK MODULE INPUT MODULE LINK CONNECTOR WAVE 1. CHECK INVERTER 2. CHECK T-CON BOARD 2008 Copyright LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
  • Page 23 Q131 OUTPUT PERIPHERALS OF Q131 (CXA2040AQ) 1. CHECK IC120 2. CHECK Vcc OF IC120 3. CHECK PERIPHERALS OF IC120 2008 Copyright LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 TRIGGER I/O PERIPHERALS OF IC113 SYNC (IC113) 1. CHECK IC120 2. CHECK Vcc OF IC120 3. CHECK PERIPHERALS OF IC120 2008 Copyright LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...
  • Page 25 CHECK SIGNAL CABLE AND (JK105, JK106) OUTPUT DEVICE 1. CHECK IC120 2. CHECK Vcc OF IC120 3. CHECK PERIPHERALS OF IC120 2008 Copyright LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...
  • Page 26 CHECK INPUT JACK OUTPUT DEVICE (JK101) 1. CHECK IC120 2. CHECK Vcc OF IC120 3. CHECK PERIPHERALS OF IC120 2008 Copyright LG Electronics. Inc. All right reserved. - 26 - LGE Internal Use Only Only for training and service purposes...
  • Page 27 CHECK AUDIO PROCESSOR CHECK VCC AND IC126 OUT PERIPHERALS OF IC126 (NTP3000A) 1. CHECK SPEAKER 2. CHECK SPEAKER CONNECOTR 2008 Copyright LG Electronics. Inc. All right reserved. - 27 - LGE Internal Use Only Only for training and service purposes...

  • Page 28: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. 2008 Copyright LG Electronics. Inc. All right reserved. - 28 - LGE Internal Use Only Only for training and service purposes...
  • Page 29 120 EAB42853801 Speaker Assembly,EAB Commercial SPK ASSy, SP-0000K(S) EMSONIC CORPORATION 200 EAJ51595601 LCD,Module-TFT,LD420WUB-SAA1 FULLHD 42INCH 1920X1080 700CD COLOR 72% 16/9 1000:1 Sony project(Narrow bezel), R/Time 9ms G to G, Viewing angle 178/178 at CR=10, 10bit(D) LG DISPLAY 300 ABJ69821201 Cabinet Assembly,M4224C LW81B 42"" CABINET ASSY 310 MFB53379701 Lens,MOLD PMMA LG CHEMICAL LENS M4224 IR LENS 400 ACQ69821301 Cover Assembly,Rear,M4224C LW81B 42""...
  • Page 30 SCHEMATIC DIAGRAM MAIN Copyright 2008 LG Electronics. Inc. All right reserved. -29- LGE Internal Use Only Only for training and service purposes...
  • Page 31 CONTROL KEY Copyright 2008 LG Electronics. Inc. All right reserved. -30- LGE Internal Use Only Only for training and service purposes...
  • Page 32 Copyright 2008 LG Electronics. Inc. All right reserved. -31- LGE Internal Use Only Only for training and service purposes...
  • Page 33 DOCKING Copyright 2008 LG Electronics. Inc. All right reserved. -32- LGE Internal Use Only Only for training and service purposes...
  • Page 34 PRINTED CIRCUIT BOARD MAIN (TOP) Copyright 2008 LG Electronics. Inc. All right reserved. -33- LGE Internal Use Only Only for training and service purposes...
  • Page 35 MAIN (BOTTOM) Copyright 2008 LG Electronics. Inc. All right reserved. -34- LGE Internal Use Only Only for training and service purposes...
  • Page 36 CONTROL (TOP) CONTROL (BOTTOM) IR BOARD (BOTTOM) IR BOARD (TOP) Copyright 2008 LG Electronics. Inc. All right reserved. -35- LGE Internal Use Only Only for training and service purposes...
  • Page 37 DOCKING (TOP) DOCKING (BOTTOM) Copyright 2008 LG Electronics. Inc. All right reserved. -36- LGE Internal Use Only Only for training and service purposes...
  • Page 38 Dec., 2008 P/NO : MFL49984509 Printed in Korea...

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M4224c-bagM4224c-bapg

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