LG Flatron L3020T Service Monitor
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LG Flatron L3020T Service Monitor

LG Flatron L3020T Service Monitor

Color monitor
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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.
MAIN
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
L3020T
(L3020AL-AL**T)
L3020A
(L3020AL-AL**A)

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  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-49 MODEL: L3020T (L3020AL-AL**T) L3020A (L3020AL-AL**A) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MAIN...

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............14 PRECAUTIONS ............4 TROUBLESHOOTING GUIDE ......16 TIMING CHART ............5 EXPLODED VIEW...........23 OPERATING INSTRUCTIONS ........ 6 REPLACEMENT PARTS LIST .......25 WIRING DIAGRAM ..........10 PIN CONFIGURATION..........35 BLOCK DIAGRAM ..........12 DESCRIPTION OF BLOCK DIAGRAM....13 SCHEMATIC DIAGRAM .........

  • Page 3: 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 4: 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 5: Timing Chart

    TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Total Period Video Active Time Front Porch Sync Duration Back Porch Sync Mode Resolution Frequency Clock Sort Polarity 31.469 640x350 25.175 70Hz...

  • Page 6: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW PC Audio Input Terminal Headphone/earphone -Connect the audio cable Connection Terminal to the LINE OUT jack in the PC sound card S-Video Input Terminal AV Output Terminal AV Input Terminal(Audio) (Audio) AV Output Terminal AV Input Terminal(Video) (Video) HDTV Input Terminal...

  • Page 7: Front Control Panel

    OPERATING INSTRUCTIONS Front Control Panel MAIN Press the button to turn on the power. Press the button again to turn it off. Power Button • Power (DPMS) The power LED will be on when power is on. • Indicator MENU Button Use this button toshow/hide the OSD(on Screen Display) menu screen.

  • Page 8: Remote Controller Buttons

    (Operational for the analog signal only) Select the sound mode : MONO/STEREO/SAP-(Only U.S.A) MONO/STEREO-AV CAPTION Button - L3020T(Only U.S.A) Video Operation Button There is not a function Applicable for LG products only which is supported - L3020A - 8 -...
  • Page 9 • Input Select Button • TV/AV Button If you press the button once, This button will be enabled only the following Input Signal when you selected the TV/AV Window will appear. Select signal. The signal type will be the signal type you want changed with the following order.

  • Page 10: Wiring Diagram

    WIRING DIAGRAM(LPL Module) Connector Ass’y P/N: 6631T20028C Connector Ass’y P/N: 6631T11016A Connector Ass’y P/N: 6631T20028E Connector Ass’y P/N: 6631T20028B J804 Connector Ass’y P/N: J803 6631T12002N J402 J802 J201 J401 J801 J605 J601 J604 Connector Ass’y P/N: Connector Ass’y P/N: 6631T20028D 6631T12002P J505 J602...
  • Page 11 WIRING DIAGRAM(CMO Module) Connector Ass’y P/N: Connector Ass’y P/N: 6631T20028C 6631T11016K Connector Ass’y P/N: 6631T20028E Connector Ass’y P/N: 6631T20028B J804 J803 Connector Ass’y P/N: J402 J802 6631T120020S J201 J403 J801 J607 J601 J606 Connector Ass’y P/N: Connector Ass’y P/N: 6631T20028D 6631T20020T J505 J602...

  • Page 12: Block Diagram

    BLOCK DIAGRAM - 12 -...

  • Page 13: 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 14: Adjustment

    ADJUSTMENT All adjustment are thoroughly checked and corrected when the monitor leaves the factory, but sometimes 2. DDC Data Write Procedure-Analog several minor adjustment may be required. 1) Use this procedure only when there is some Adjustment should be following procedure and after problem on Analog EDID data.

  • Page 15: 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. ADJUSTMENT SETUP MODEL L3020AL CONTRAST NVRAM INITIAL BRIGHTNESS 21 H ELAPSED T IME COLOR MICOM VERSION Ver.

  • Page 16: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK J601 CHECK POWER BOARD VOLTAGE (18V, 12V, 5V)? CHECK J602 VOLTAGE CHECK POWER BOARD (LPL: 24V, CMO: 12V) ? CHECK X401 CHECK X401 (14.318MHz) ? CHECK CHECK MICOM(U402) J601 SUB POWER PORT(R419) (SUB POWER) ? CHECK KEY...
  • Page 17 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 (J403)? CHECK INVERTER POWER CHECK U604 AND THE (LPL: J604, J605 PERIPHERAL IC U604 CMO: J606, J607) ? CHECK INVERTER - 17 -...
  • Page 18 3. NO RASTER ON VIDEO SIGNAL INPUT NO RASTER ON VIDEO SIGNAL POWER CHECK OF CXA2040(U3) : L3(9V) POWER CHECK OF UPD64083(U6) : U5(3.3V), L17(2.5V) POWER CHECK OF FLI2310(U301) : L307(3.3V), L302(3.3V), L308(1.8V), L301(1.8V) POWER CHECK OF GM1501(U402) CHECK CABLE OF VIDEO/COMPONENT NO INPUT SIGNAL CHECK UPD64083(U6)I/O...
  • Page 19 4. NO RASTER ON TV SIGNAL INPUT NO RASTER ON TV SIGNAL POWER CHECK OF TUNER(TU701) : C714(3.3V), C716(5V) POWER CHECK OF CXA2040(U3) : L3(9V) POWER CHECK OF UPD64083(U6) :L17(2.5V), L20(2.5V) POWER CHECK OF VPC3230(U16) :L18(5V), L9(3.3V) POWER CHECK OF FLI2310(U301) :L302(3.3V), L307(3.3V), L301(1.8V), L308(1.8V) POWER CHECK OF GM1501(U402) CHECK CONNECTION OF TV TUNER AND ANTENNA...
  • Page 20 5. SOUND TROBLE SHOOTING NO SOUND OUTPUT POWER CHECK OF MSP3420G(U503) : L514(8V), L509(5V), L512(5V) POWER CHECK OF TPA3004(U505) : C587(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 21 6. NO RASTER STATE ON ANALOG SIGNAL NO RASTER ON ANALOG SIGNAL POWER CHECK OF BA7657(U103) : L102(5V) POWER CHECK OF GM1501(U402) POWER CHECK OF LVDS OUTPUT: J403 CONNECTOR(J103) CHECK CHECK I/O SYNC OF BA7657(U103) CHECK THE PERIPHERAL IC NO INPUT SIGNAL OF D-SUB(J103) CHECK ADC I/O SIGNAL IN GN1501(U402)
  • Page 22 7. NO RASTER STATE ON DIGITAL SIGNAL NO RASTER STATEON DIGITAL SIGNAL POWER CHECK OF GM1501(U402) POWER CHECK OF LVDS OUTPUT: J403 CONNECTOR(J102) 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 23 - 23 -...

  • Page 24: Exploded View

    CORD, A/V, RCA CABLE UL2863 AWG28 3000MM BLACK(9930) DH-3P-N300C LM295B 6852TAZ006B CORD, A/V, DIN CABLE UL 2990-9C(5.5) 1560MM BLACK(9930) DH-150DIN LM295B 6852TAZ006D CORD, A/V, A/V KHC-LG-3-0010 UL 2851 #28-2C 1500MM BLACK(9930) KSD WITH CORE LM295B 6852TAZ006J CABLE, D-SUB, UL 2990-9C(7.5) DT 1870MM PEARL WH T541K DM 6850TD9001J...

  • Page 25: 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: 2003. 12. 23. DATE: 2003. 12. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 26 DATE: 2003. 12. 23. DATE: 2003. 12. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C124 0CH3105H946 1UF 25V 80%,-20% F(Y5V) 2012 C285 0CC101CK41A 100PF 1608 50V 5% R/TP NP0 C125 0CE336BH638 33UF KME 25V M FM5 TP5...
  • Page 27 DATE: 2003. 12. 23. DATE: 2003. 12. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C406 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C509 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C407 0CH8226F691 22UF 16V 20% 105STD (CYL) R/T...
  • Page 28 DATE: 2003. 12. 23. DATE: 2003. 12. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C588 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C691 0CE227BF638 220U KME 16V M FM5 TP5 C589 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R...
  • Page 29 0IPMGSG020A LD1117DT18TR SGS-THOMSON 3P,D ZD802 0DZ560009DA UDZ S 5.6B TP ROHM-K SOD323 2 U702 6700NF0004B TAFH-H001P LG INOTEK NTSC FS -(LPL) ZD803 0DZ560009DA UDZ S 5.6B TP ROHM-K SOD323 2 COILs & COREs ZD804 0DZ560009DA UDZ S 5.6B TP ROHM-K SOD323 2...
  • Page 30 DATE: 2003. 12. 23. DATE: 2003. 12. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L203 0LC2000005D F1-B2012-332KJT,3.3 UH CERATE 0TR390409AE FAIRCHILD KST3904(LGEMTF) TP L204 0LC2000005D F1-B2012-332KJT,3.3 UH CERATE 0TR150400BA CHIP 2SA1504S(ASY) BK KEC - - L208...
  • Page 31 DATE: 2003. 12. 23. DATE: 2003. 12. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R128 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP 0RJ4700D677 470 OHM 1/10 W 5% 1608 R/TP R129...
  • Page 32 DATE: 2003. 12. 23. DATE: 2003. 12. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R264 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R448 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP R266 0RH4701D622 4.7K 1/10W 5 D.R/TP...
  • Page 33 DATE: 2003. 12. 23. DATE: 2003. 12. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R548 0RJ3302D677 33K OHM 1/10 W 5% 1608 R/TP R702 0RH0000D622 0 1/10W P-TYPE TAPPING R549 0RJ2002D677 20000 OHM 1/10 W 5% 1608 R/TP...
  • Page 34 DATE: 2003. 12. 23. DATE: 2003. 12. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RA303 0RHZTCZ001D RCA86TRJ22R0 SMART 22OHM 1/16 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP RA304 0RHZTCZ001D RCA86TRJ22R0 SMART 22OHM 1/16...

  • Page 35: Pin Configuration

    PIN CONFIGURATION BA7657 Multimedia ICs BLOCK DIAGRAM Red 1 input HD 1 input HD Sync Signal detector HD 2 input Green 1 input HD output Ground Red output DET. Blue 1 input Ground Green output Composite video input Red 2 input (Sync on Green) Syncsepa Ground...
  • Page 36 GM1501 GENESIS 406P Parallal 2-wlre JTAG IF/extermal Serial I/F GPIO micro Pulse wldth X186 External Bandwidth Infra-red Rx Modulator Interface Micro- ROM I/F controller 14,318 MHz Internal Internal Grystal Clock Reference Generation TTL/ Panel Data LVDS /Control DVI-Compliant Input Ultra-Reliable Display DDC2Bi DVI Rx...

  • Page 37: Schematic Diagram

    SCHEMATIC DIAGRAM 1. TUNER/AV/PC INPUT - 37 -...
  • Page 38 2. VIDEO DEC./CAPITION - 38 -...
  • Page 39 3. FLI2310/HY57V643220 - 39 -...
  • Page 40 4. SCALER(GM1601) - 40 -...
  • Page 41 5. AUDIO CTL/AMP/RS232 - 41 -...
  • Page 42 6. POWER/CONNECTOR - 42 -...
  • Page 43 7. TUNER - 43 -...
  • Page 44 8. AV IN/OUT JACK - 44 -...
  • Page 45 9. KEY CONTROL - 45 -...
  • Page 46 Jan. 2004 P/NO : 3828TSL093C Printed in Korea...

This manual is also suitable for:

Flatron l3020aFlatron l3020al-altFlatron l3020al-alaFlatron aga

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