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LG FLATRON L4200A Service Manual

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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : CL-49
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
L4200A
(L4200AL-AL**A)
L4200A
(L4200AFL-AL**A)
L4200A
(L4200APL-AL**A)
L4200A
(L4200ATL-AL**A)

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  • Page 1 Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-49 MODEL: L4200A (L4200AL-AL**A) L4200A (L4200AFL-AL**A) L4200A (L4200APL-AL**A) L4200A (L4200ATL-AL**A) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 3: Table Of Contents

    CONTENTS SPECIFICATIONS ............. 2 DESCRIPTION OF BLOCK DIAGRAM.....17 PRECAUTIONS ............4 ADJUSTMENT ............18 TIMING CHART ............5 ADJUST WHITE BALANCE ........20 OPERATING INSTRUCTIONS ........7 TROUBLESHOOTING GUIDE ........ 21 REMOTE CONTROLLER BUTTONS......9 EXPLODED VIEW .............27 WIRING DIAGRAM ..........12 REPLACEMENT PARTS LIST .........29 BLOCK DIAGRAM ...........

  • Page 4: Signal Connector Pin Assignment

    Signal Connector Pin Assignment • DVI-D Connector (Digital) Signal (DVI-D) Signal (DVI-D) T. M. D. S. Data2- Hot Plug Detect T. M. D. S. Data2+ T. M. D. S. Data0- T. M. D. S. Data0+ T. M. D. S. Data2/4 Shield T.

  • Page 5: Precautions

    PRECAUTION Warning for the Safety-related Component. Warning Be careful electric shock ! • There are some special components used in LCD monitor that are important for safety. These parts are • If you want to replace with the new backlight (CCFL) or marked on the schematic diagram and the inverter circuit, must disconnect the AC adapter...

  • Page 6: Timing Chart

    TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> 1) PC Mode Total Video Front Sync Back Sync Mode Frequency Period Active Time Porch Duration Porch Resolution Sort Porarity Clock 31.469...
  • Page 7 Total Video Front Sync Back Sync Mode Frequency Period Active Time Porch Duration Porch Resolution Sort Porarity Clock 44.772 1664 1280 74.5 1280 x 720 59.855 47.72 1776 1360 84.75 1360 x 768 59.799 63.981 1688 1280 108.0 1280 x 1024 60.02 1066 1024...

  • Page 8: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW Front Control Panel(P8) REAR VIEW Back Cap - Open the back cap before you install the monitor. [Case 1] Video [Case 2] RS-232C Serial ports PC signal inputs Connect the audio cable to the Video *LINE OUT jack of the PC sound card. AV Input ports Connect the power cord *LINE OUT...

  • Page 9: Front Control Panel

    OPERATING INSTRUCTIONS Front Control Panel Power Button • Press the button to turn on the power. Press the button again to turn it off. • This Indicator lights up green when the display operates normally. If the display is in DPM Power LED (Energy Saving) mode, this indicator color changes to amber.

  • Page 10: Remote Controller Buttons

    PC: Automatic adjustment function which is supported (Operational for the analog signal only) Sound Mode Select Select the sound mode : MONO/STEREO There is not a function which is supported Video Operation Button Applicable for LG products only - 9 -...

  • Page 11: Scart 1 Scart

    • Input Select Button • AV Button If you press the button once, BRT.W the following Input Signal This button will be enabled only when you selected the AV signal. Window will appear. Select The signal type will be changed the signal type you want with the followaing order.
  • Page 12 3. Swap Button You can swap the main screen and the sub-screen when the PIP/POP/PBP function is used. SWAP SWAP When 'Input Signal 1' comes on in the main screen, only 'Input Signal 2' can be displayed on the sub-screen. On the contrary, if the main screen displays 'Input Signal 2', the sub-screen can display 'Input Signal 1' only.

  • Page 13: Wiring Diagram

    WIRING DIAGRAM - 12 -...

  • Page 14: Block Diagram

    BLOCK DIAGRAM(Video1) MAX232 - 13 -...
  • Page 15 BLOCK DIAGRAM(Video2) MAX232 - 14 -...
  • Page 16 BLOCK DIAGRAM(Audio) - 15 -...
  • Page 17 BLOCK DIAGRAM(Power) - 16 -...

  • Page 18: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Input Selection Circuit 6. De-interlacer 1) Analog Input Selection This block is composed of FLI 2310(U301) and This block is composed of BA7657F(U103) and peripheral devices. peripheral devices. GM1501 (U402) controls this IC through IIC Line. There are analog H/V Syncs.

  • Page 19: Adjustment

    ADJUSTMENT Windows EDID V1.0 User Manual 2. EDID Read & Write 1) Run WinEDID.exe Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don’t need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. 1.

  • Page 20: Service Osd

    SERVICE OSD - When entering Service mode : Press the Menu key using a remote controller and input the number (3 -> 0 -> 2 -> 0) to enter Service mode. 1. MODEL : Shows the model name of the current product. 2.

  • Page 21: Adjust White Balance

    ADJUST WHITE BALANCE 1. Input Analog signal through D-sub. 2. Press MENU Key and 3, 0, 2, 0 Num.key 3. Then move SETUP. You can see SVC OSD. SETUP ADJUSTMENT MODEL L4200AL CONTRAST NVRAM INITIAL BRIGHTNESS 21 H ELAPSED T IME COLOR MICOM VERSION Ver.

  • Page 22: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK J602 VOLTAGE CHECK POWER BOARD (18V, 12V, 5V)? CHECK CHECK POWER BOARD J601 VOLTAGE (24V, 12V) ? CHECK CHECK POWER BOARD J609 VOLTAGE (5V, 9V, 24V) ? CHECK X401 CHECK X401 (14.318MHz) ? CHECK...
  • Page 23 2. NO RASTER(OSD IS NOT DISPLAYED) NO RASTER (OSD IS NOT DISPLAYED) CHECK THE PERIPHERAL CHECK U402? IC U402 CHECK CHECK THE PERIPHERAL LVDS OUTPUT IC U402 (J401)? CHECK CHECK U604 AND THE INVERTER POWER PERIPHERAL IC U604 (J605, J605) ? CHECK INVERTER - 22 -...
  • Page 24 3. NO RASTER ON VIDEO SIGNAL INPUT NO RASTER ON VIDEO SIGNAL POWER CHECK OF CXA2040(U202) : R248(9V) POWER CHECK OF UPD64083(U805) : #93 PORT 2.5V POWER CHECK OF FLI2310(U301) : R308, R311(3.3V), PORT#165(1.8V) POWER CHECK OF GM1501(U402) CHECK CABLE OF VIDEO/COMPONENT NO INPUT SIGNAL CHECK UPD64083(U8.3)I/O...
  • Page 25 4. SOUND TROBLE SHOOTING NO SOUND OUTPUT POWER CHECK OF MSP3420G(U503) : L505(8V), L508(5V), R509(5V) POWER CHECK OF TPA3004(U505) : C510(18V) CHECK SOUND OF VCR,DVD,PC (TV)CHECK OF CONNECTION OF TUNER AND ANTENNA CHECK SOUND INPUT =>PC SOUND(J804) =>VIDEO, DVD, DTV SOUND (RED, WHITE OF J809, J808) CHECK THE PERIPHERAL IC OF NO INPUT SIGNAL...
  • Page 26 5. NO RASTER STATE ON ANALOG SIGNAL NO RASTER ON ANALOG SIGNAL POWER CHECK OF BA7657(U103) : L105(5V) POWER CHECK OF GM1501(U401) POWER CHECK OF LVDS OUTPUT: J403 CONNECTOR(J101) CHECK CHECK I/O SYNC OF BA7657(U103) CHECK THE PERIPHERAL IC NO INPUT SIGNAL OF D-SUB(J101) CHECK ADC I/O SIGNAL IN GN1501(U402)
  • Page 27 6. NO RASTER STATE ON DIGITAL SIGNAL NO RASTER STATEON DIGITAL SIGNAL POWER CHECK OF GM1501(U402) POWER CHECK OF LVDS OUTPUT: J401 CONNECTOR(J103) CHECK NO INPUT SIGNAL CHECK GM1501(U402) I/O SIGNAL CHECK THE PERIPHERAL IC NO OUTPUT SIGNAL OF GM1501(U402) NO INPUT SIGNAL CHECK THE PERIPHERAL IC CHECK LVDS I/O SIGNAL...
  • Page 28 - 27 -...

  • Page 29: Exploded View Parts List

    CABINET ASSEMBLY, L4200A BRAND 3090TKE005A .- L4200AFL 3091TKE006E CABINET ASSEMBLY, L4200AL BRAND 3090TKE005A .- L4200AL, L4200ATL, L4200APL 6304FLP125A LCD(LIQUID CRYSTAL DISPLAY), LC420W02-A4K1 LG PHILPS TFT COLOR NORMAL POL,WXGA,20LAMP,500NITS, H-L, W/O AI 4951TKS144A METAL ASSEMBLY, FRAME CENTER (L4200A) 4951TKS142A METAL ASSEMBLY, FRAME SIDE(L)

  • Page 30: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 31 DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C312 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C406 0CH8226F691 22UF 16V 20% 105STD (CYL) R/ C313 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R...
  • Page 32 DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C503 0CH8476F691 47UF 16V 20% 105STD (CYL) R/ C573 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C504 0CC3R3CK01A 3.3PF 1608 50V 0.25 PF R/TP...
  • Page 33 DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C659 0CE227BF638 220U KME 16V M FM5 TP5 C862 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C660 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 34 DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION D603 0DS226009AA KDS226 TP KEC SOT-23 80V 30 U608 0ISS780500H "KA78M05-R 3P,D-PAK TP 5V 0.5" D604 0DD184009AA KDS184 TP KEC - 85V - - - 30...
  • Page 35 DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L609 6210TCE001G HH-1M3216-501 CERATEC 3216MM Q809 0TR150400BA CHIP 2SA1504S(ASY) BK KEC - L610 6210TCE001H HB-1T2012-301JT CERATEC 2012 Q810 0TR387500AA...
  • Page 36 DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R207 0RJ4700D677 470 OHM 1/10 W 5% 1608 R/TP R285 0RJ2200D677 220 OHM 1/10 W 5% 1608 R/TP R210 0RJ6800D677 680 OHM 1/10 W 5% 1608 R/TP...
  • Page 37 DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R418 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R494 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R419 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP...
  • Page 38 DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R574 0RH4703D622 470K 1/10W 5 D.R/TP R805 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP R575 0RH4703D622 470K 1/10W 5 D.R/TP...
  • Page 39 DATE: 2004. 04. 26. DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RA202 0RHZTCZ001D RCA86TRJ22R0 SMART 22OHM 1/1 D802 0DS226009AA KDS226 TP KEC SOT-23 80V 30 RA301 0RHZTCZ001D RCA86TRJ22R0 SMART 22OHM 1/1...
  • Page 40 DATE: 2004. 04. 26. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ZD818 0DZ560009DA UDZ S 5.6B TP ROHM-K SOD323 ZD819 0DZ360009EB UDZ 3.6B TP ROHM SOD323 200M ZD820 0DZ360009EB UDZ 3.6B TP ROHM SOD323 200M ZD821 0DZ360009EB UDZ 3.6B TP ROHM SOD323 200M ZD822 0DZ360009EB UDZ 3.6B TP ROHM SOD323 200M...

  • Page 41: Schematic Diagram

    SCHEMATIC DIAGRAM 1. DSUB / DVI / TUNER INPUT - 40 -...
  • Page 42 2. CXA2040AQ / VPC3230 / 3D-COMB / TTX - 41 -...
  • Page 43 3. FLI2310/ HY57V643220CTB / ML87V2104 / MST9883 - 42 -...
  • Page 44 4. SCALER(GM1501) - 43 -...
  • Page 45 5. AUDIO CTL / AMP/RS232 - 44 -...
  • Page 46 6. POWER / CONNECTOR - 45 -...
  • Page 47 7. TUNER - 46 -...
  • Page 48 8. TTX / 3D-COMB - 47 -...
  • Page 49 9. SPEAKER - 48 -...
  • Page 50 Blank Page1...
  • Page 51 Blank Page2...
  • Page 52 Apr. 2004 P/NO : 3828TSL093H Printed in Korea...

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