LG Flatron L245WP Service Manual Download | Manualshive

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3. NO RASTER (OSD IS NOT DISPLAYED) - MAIN

1. CHECK PIN G3,G4

SOLDERING CONDITION

2. CHECK X201
3. TROUBLE IN U204

CHECK U401 PIN2(2.5V)

U412 PIN2(2.5V)

U403,U404 PIN2(3.3V)

U406 PIN2(1.8V)

NO

NO

NO

CHECK U406(1.8V),
U401(3.3V)

U204

PIN G3,G4

14.3MHZ?

CHECK CONNECTION
LINE FROM D-SUB TO
U204

TROUBLE IN CABLE

OR LCD MODULE

YES

YES

NO RASTER

(OSD IS NOT DISPLAYED)

CHECK U204

PIN L4(H-SYNC) AND

PIN L3(V-SYNC).

IS PULSE APPEARED AT

SIGNAL PINS?

YES

1

Waveforms

1

X201

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Summary of Contents for Flatron L245WP

Page 1: ...LOR MONITOR SERVICE MANUAL Website http biz LGservice com CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS NO LM62D MODEL L245WP L245WP BNQ A BQF Same model for Service ...

Page 2: ...arate Sync SOG Digital 3 2 Video Input Signal 1 Type R G B Analog 2 Voltage Level 0 0 7 V 3 Input Impedance 75 Ω 3 3 Operating Frequency Horizontal 30 83kHz Vertical 56 75Hz Dot clock 165MHz 4 MAX RESOLUTION Analog 1920 x 1200 60Hz Digital 1920 x 1200 60Hz 5 POWER SUPPLY 5 1 Power Adaptor Built in Power Input AC 100 240V 50 60Hz 1 2A 5 2 Power Consumption 6 ENVIRONMENT 6 1 Operating Temperature 10...

Page 3: ...c T M D S Data1 T M D S Data1 T M D S Data1 3 Shield T M D S Data3 T M D S Data3 5V Power Ground return for 5V H Sync and V Sync Pin Signal DVI D 1 8 9 17 24 16 16 17 18 19 20 21 22 23 24 Hot Plug Detect T M D S Data0 T M D S Data0 T M D S Data0 5 Shield T M D S Data5 T M D S Data5 T M D S Clock Shield T M D S Clock T M D S Clock T M D S Transition Minimized Differential Signaling DVI D Connector ...

Page 4: ...e module from the ESD as it may damage the electronic circuit C MOS Make certain that treatment person s body are grounded through wrist band Do not leave the module in high temperature and in areas of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circuit within the module If the surface of panel become dirty please wipe i...

Page 5: ...st receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead Always remove the test receiver ground lead last 9 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices ...

Page 6: ...tip as the solder melts 2 Draw away the melted solder with an anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coati...

Page 7: ...onnection 4 Route the jumper wire along the path of the out away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This technique involves the installation of a jumper wire on t...

Page 8: ...TIMING CHART 8 VIDEO SYNC F E C A B D PC INPUT ...

Page 9: ... 9 DISASSEMBLY Thumb screw by turning it counterclockwise as shown Open the Cabinet latch 1 Remove the screws 2 Disassembly Stand 1 2 3 1 Open the Back cover latch 2 Disassemble Back cover 4 ...

Page 10: ...L LCD Panel 24 wide 1920x1200 USB UPx 1 USB DOWN x 2 USB 2 0 Hub Power PFC AC in Control Speaker option DC out 12V ADC 165MHz Digital RGB YUV 162MHz Scaler gm1601H CF LF LVDS MUX Digital video processor Memory controller Micro RGB HV X OK OK COMP X X OK HDMI video timing X X X D SUB COMP HDMI PC timing D SUB PIP AD converter MST9883 Analog SW BA7657 0 472 2 32 2 02 0 46 KRW 3610 0 553 0 9 10 BLOCK...

Page 11: ...7 33 H S 12VS 2 5V_DDR 2 5V_GM 3 3V_HDMI 1 8V_HDMI 3 3VA 1 8_CORE 1 8_DVI 1 8_ADC 3 3_DVI 3 3_PLL 3 3_ADC USB 3 3V 5V_MOD 12V 5VR 5VM FAN1117 LD1086 BA033 BA033 BA033 IRF7314 70mA 175mA 90mA 320mA 250mA 250mA 490mA 20mA 25mA 90mA 120mA 1880mA SI3865 ...

Page 12: ...ough a bridge rectifier and a bulk capacitor 3 Energy Transfer This part function is for transfer the primary energy to secondary through a power transformer 4 Output rectifier and filter This part function is to make a pulse width modulation control and to provide the driver signal to power switch to adjust the duty cycle during different AC input and output loading condition to achieve the dc ou...

Page 13: ...or LCD Monitor only 1 Port Setup a Copy UserPort sys file to c WINNT system32 drivers folder b Run Userport exe c Remove all default number d Add 300 3FF e Click Start button f Click Exit button 2 EDID Read Write 1 Run WinEDID exe 2 Edit Week of Manufacture Year of Manufacture Serial Number a Input User Info Data b Click Update button c Click Write button 3 If HDMI use the 256byte tool ...

Page 14: ...eo Signal Generator Figure 1 Cable Connection SERVICE OSD 1 Turn off the power switch at the right side of the display 2 Wait for about 5 seconds and press MENU POWER switch for 1 second interval 3 The SVC OSD menu contains additional menus that the User OSD menu as described below a NVRAM INITIAL To make shipping state b ADC CALIB RGB RGB input calibration of ADC c ADC CALIB COMP Component input ...

Page 15: ... SHORT POINT AS OPENING EACH POWER LINE CHECK U401 2 5V U412 2 5 U406 1 8V LINE NO CHECK CRYSTAL U204 YES CHECK J104 VOLTAGE PIN12 13 14 5V IS U401 PIN2 2 5V IS U412 PIN2 2 5V U403 U404 PIN2 3 3V U406 PIN2 1 8V CHECK IC501 PIN G4 G3 PULSE 1 2 3 1 4 Waveforms 1 J104 2 13 14 2 U406 2 3 U403 U404 2 4 U204 G3 G4 YES YES ...

Page 16: ... PIN12 13 14 5V NO NO NO NO CHECK J104 PIN 2 POWER BOARD LIPS CHECK PULSE AS CONTACTING PROBE TO THE LAMP WIRE OF THE LCD MODULE REPLACE LCD MODULE YES 1 2 3 4 YES YES YES 3 J104 2 3 J104 2 Brightness 100 Brightness 0 1 J104 12 13 14 4 Lamp current 2 J104 1 Waveforms 1 CONFIRM BRIGHTNESS OSD CONTRL STATUS 2 CHECK SCALER DIM ADJ PORT 3 CHECK SCALER LAMPADJ PORT ...

Page 17: ...N2 2 5V U412 PIN2 2 5V U403 U404 PIN2 3 3V U406 PIN2 1 8V NO NO NO CHECK U406 1 8V U401 3 3V U204 PIN G3 G4 14 3MHZ CHECK CONNECTION LINE FROM D SUB TO U204 TROUBLE IN CABLE OR LCD MODULE YES YES NO RASTER OSD IS NOT DISPLAYED CHECK U204 PIN L4 H SYNC AND PIN L3 V SYNC IS PULSE APPEARED AT SIGNAL PINS YES 1 Waveforms 1 X201 ...

Page 18: ...TROUBLE IN DPM TROUBLE IN DPM TROUBLE IN IC501 CHECK PC PC IS GOING INTO DPM MODE NO CHECK H V SYNC LINE NO YES CHECK R120 AND R122 SYNC APPEARED CHECK U204 X201 SYNC PULSE YES 1 H SYNC 2 V SYNC Waveforms 1 2 ...

Page 19: ...ECK U411 PIN2 5V CHECK U402 U405 EACH 3 3V 1 8V YES CHECK 5VR HDMI ON SIGNAL CHECK U402 U405 NO CHECK R662 R663 THERE ARE NO SYNC YES CHECK DATA LINE NO CHECK HOT PLUG DETECTION IS HIGH YES CHECK DVD PLAYER CONNECTION OR Q601 AND DDC COMMUICATION LINE OR EDID DATA ...

Page 20: ...BLE IN U302 NO NO YES CHECK U409 PIN2 5V CHECK U407 PIN 3 3 3VA YES CHECK 5VS VIDEO ON SIGNAL CHECK U407 NO CHECK R347 349 THERE ARE NO SYNC YES CHECK DATA LINE NO CHECK COMPONENT Y OK YES CHECK DVD PLAYER CONNECTION OR Q601 AND DDC COMMUICATION LINE ...

Page 21: ...WIRING DIAGRAM 21 EAD32744101 30P 6P 4P 14P 2P 12P 6631T20038H EAD31342002 6631900047C EAD30368603 6631V12031F ...

Page 22: ...EXPLODED VIEW 22 010 120 020 080 070 090 140 100 110 030 040 060 050 130 ...

Page 23: ...e assy _ C SKD 4970TKK023C Spring CUTTING STSC304 COIL STSC304 1 5 L245WP LOCKING CLIP PIN 6709900034B Power Supply Assembly FREE BRAND 24SERIES LCD HE BRAND EBU31485801 Main Total Assembly L245WP BRAND LM62D AGU30305701 Plate Assembly REAR L245WP MAINFRAME ASSY AGU30305702 Plate Assembly REAR L245WP MAINFRAME ASSY C SKD 66339A0021A Inverter DC AC FIF2412 33A 21 6VTO26 4V 850V 6MA 6 YES MGJ3031370...

Page 24: ...NO DESCRIPTION SPECIFICATION C241 0CK104CK56A 0603B104K500CT 100nF 10 50V C242 0CK104CK56A 0603B104K500CT 100nF 10 50V C244 0CE107EF610 KMG16VB100M 100uF 20 16V 12 C245 0CK104CK56A 0603B104K500CT 100nF 10 50V C246 0CK104CK56A 0603B104K500CT 100nF 10 50V C247 0CK104CK56A 0603B104K500CT 100nF 10 50V C248 0CK104CK56A 0603B104K500CT 100nF 10 50V C249 0CK104CK56A 0603B104K500CT 100nF 10 50V C250 0CK104...

Page 25: ...F 10 50V C425 0CK104CK56A 0603B104K500CT 100nF 10 50V C426 0CE226WF6DC MVK5 0TP16VC22M 22uF 20 16V DATE 2007 02 07 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C427 0CE226WF6DC MVK5 0TP16VC22M 22uF 20 16V C428 0CK104CK56A 0603B104K500CT 100nF 10 50V C429 0CK104CK56A 0603B104K500CT 100nF 10 50V C430 0CK105DH56A C2012X7R105KFT 1uF 10 25V X C431 0CE107EF610 KMG16VB100M 100uF 20 16V 12 C432 0CK104CK5...

Page 26: ...0603KRY5P9BB152 1 5nF 10 C677 0CK105DH56A C2012X7R105KFT 1uF 10 25V X C678 0CE107EF610 KMG16VB100M 100uF 20 16V 12 C679 0CE107EF610 KMG16VB100M 100uF 20 16V 12 DATE 2007 02 07 S AL LOC NO PART NO DESCRIPTION SPECIFICATION D101 0DS226009AA KDS226 1 2V 85V 300MA 2A 4NS D102 0DS226009AA KDS226 1 2V 85V 300MA 2A 4NS D103 0DS226009AA KDS226 1 2V 85V 300MA 2A 4NS D104 0DSON00138A MMBD301LT1G 600MV 30V 1...

Page 27: ...10 R113 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10 R114 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10 R115 0RJ0752D677 MCR03EZPJ750 75OHM 5 1 10W R116 0RJ0752D677 MCR03EZPJ750 75OHM 5 1 10W R117 0RJ0752D677 MCR03EZPJ750 75OHM 5 1 10W R118 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R119 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R120 0RJ0682D677 MCR03EZPJ680 68OHM 5 1 10W R121 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10...

Page 28: ...0OHM 5 1 10W 1 R310 0RJ4700D677 MCR03EZPJ471 470OHM 5 1 10W R311 0RJ4700D677 MCR03EZPJ471 470OHM 5 1 10W DATE 2007 02 07 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R312 0RJ4700D677 MCR03EZPJ471 470OHM 5 1 10W R313 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1 R314 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1 R315 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1 R316 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W R317 0RJ0...

Page 29: ...3EZPJ220 22OHM 5 1 10W R646 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W R647 0RJ0332D677 MCR03EZPJ330 33OHM 5 1 10W R648 0RJ1004D677 MCR03EZPJ105 1MOHM 5 1 10W DATE 2007 02 07 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R649 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10 R650 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R654 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 20 R655 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 20 R66...

Page 30: ...UE YELLOW P1 6602T12005E 12505WR 06A00 6P 1 25MM 1R A P2 6602T12005C 12505WR 04A00 4P 1 25MM 1R A Q901 0TRDI80002A MMBT3904 F NPN 6V 60V 40V Q902 0TRDI80002A MMBT3904 F NPN 6V 60V 40V R912 0RJ2000D677 MCR03EZPJ201 200OHM 5 1 10W R913 0RJ2000D677 MCR03EZPJ201 200OHM 5 1 10W R914 0RJ2700D677 MCR03EZPJ271 270OHM 5 1 10W R915 0RJ2700D677 MCR03EZPJ271 270OHM 5 1 10W R916 0RJ4700D677 MCR03EZPJ471 470OHM...

Page 31: ...SCHEMATIC DIAGRAM 31 1 CONNECTORS JACKS ...

Page 32: ... 32 2 SCALER ...

Page 33: ... 33 3 COMP INPUT A D CONVERTER ...

Page 34: ... 34 4 POWER CONNECTION ...

Page 35: ... 35 5 USB ...

Page 36: ... 36 6 HDMI ...

Page 37: ... 37 7 CONTROL ...

Page 38: ...Feb 2007 P NO MFL36713637 Printed in Korea ...

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