Daewoo DLT-20W2 Service Manual Download Page 19 | Manualshive

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Trouble Shooting

7-1. When LED doesn’t lit.

Is the AC power cord
correctly connected?

Is power S/W ON?

Is output voltage of
Power module correct?
(or LIPS)

Confirm power cord
connection.

Confirm Power S/W ON.

Check the power connection.
Exchange the power module.

Check start

Y

N

N

N

Y

Y

Y

Check the Main PCB.

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Summary of Contents for DLT-20W2

Page 1: ...Service Manual 20 LCD CHASSIS Model S M NO DSL140TEF0 SL 140T DLT 20W2 Jul 2007 ...

Page 2: ...ty Precaution 3 2 Product Specification 4 3 Block Diagram 5 4 Schematic Diagram 8 5 PCB Data 16 6 Trouble Shooting 18 7 Service Part List 26 7 1 Service Part List 26 9 Power 31 10 Inverter 32 11 Out Line 34 12 Exploded View 35 SOFTWARE INSTALL UPGRADE 2 ...

Page 3: ...crews holding PCBs are working as electric circuit grounding make sure to check if any screw is missing when assembling reassembling Do not leave any screws inside the set 5 A LCD Set contains different kinds of connector cables When connecting or disconnecting cables check the direction and position of the cable beforehand 6 Connect disconnect the connectors slowly with care especially FFC film c...

Page 4: ......

Page 5: ... I603 H P AMP I601 AUDIO AMP 5V_Clean IF VIF SIF SAWS W AGC AGC_ADJ R G B CVBS AUDIO L R TS SCART IN R G B FB L R Vin SCART OUT Vout L R S SW UOC_UP SCALAR_UP Front AV S VHS IN V Y C Front AUDIO IN L R HDMI IN D VIDEO L R R G B SPDIF OUT COMP AUDIO IN L R COMP Video IN Y Pb Pr PC IN R G B PC AUDIO IN L R IIC KEYB IR HP L R Out MAIN L R Out RST WR OE LVDS BL EN BL_ADJ L R LED Address 0 17 Data 0 8 ...

Page 6: ...ch 74LVC573 BUS Transceiver 74LVC245 EEPROM M24C64 ADC UDA1334BTS A_MDI 0 7 A_MDO 0 7 PCMCIA 0 7 PCMCIA_D 0 7 TS_DATA 0 7 MIU_DATA 0 7 MIU_ADDR 0 24 TDA_Data 0 7 SDRAM_DATA 0 15 SDRAM_ADDR 0 14 R G B CVBS DVB AUDIO L R IIC IIS Latch 74LVC573 TS_Valid TS_Sync TS_CLK PCMCIA 8 14 8 8 8 24 8 15 8 7 2 2 4 2 16 15 ...

Page 7: ... 3V I806 LM317 9V 5V I808 LM317 9V 5V I809 AP1117E18A 3 3V 1 8V I812 AP1117E18A 3 3V 1 8V I821 AP1117E33A 5V 3 3V I822 AP1117E18A 5V 1 8V I853 APW1172 5V 1 2V I805 IRF7316 Channel 1 15V Switching Channel 2 PANEL Power Switching TUNER ICD12 I501 LOCII IA03 IA05 EEPROM Etc I305 HDMI I305 HDMI ICD02 I501 LOC II ICD13 I601 PANEL AUO 20 INCH 24V BL_EN BL_ADJ ...

Page 8: ...4 Schematic Diagram 8 ...

Page 9: ... 9 Schematic Diagram ...

Page 10: ...Schematic Diagram 10 ...

Page 11: ...Schematic Diagram 11 ...

Page 12: ...Schematic Diagram 12 ...

Page 13: ...Schematic Diagram 13 ...

Page 14: ... 14 Schematic Diagram ...

Page 15: ... 15 Schematic Diagram ...

Page 16: ...6 PCB Data 16 TOP ...

Page 17: ...PCB Data 17 BOTTOM ...

Page 18: ...Required equipments for trouble diagnosis Digital Multi meter measure Dc voltage measure Diode Voltage Short Open test Screwdriver or electric screwdriver plastic adjusting tool 5 Before assemble disassemble PCBs check to see if AC Switch is OFF 6 After Back cover is closed redo Heat run for at least one hour by inputting Full white pattern Symptoms of power inverter panel Trouble Symptom 1 Not ev...

Page 19: ...he AC power cord correctly connected Is power S W ON Is output voltage of Power module correct or LIPS Confirm power cord connection Confirm Power S W ON Check the power connection Exchange the power module Check start Y N N N Y Y Y Check the Main PCB ...

Page 20: ... Power module Confirm Power S W ON Check the connection to IR PCB Check the operation of Remote Controller Check start Y N N Y Is output voltage of Power module correct or LIPS Y 7 3 When white screen Is normal Check the Main PCB Check start Y N Y Is correctly connected Check the connection Of Panel N Y Check the connector or Main PCB ...

Page 21: ... Does LED turn on in GREEN Does auto tuning Function operate normally Go to chap 7 2 Check start Y N N N Y Y Y Tune the channel Check the tuner Is this weak discharge On the screen Confirm AC connection Confirm Power SW ON Check the power Inverter and panel N Y Check I501 ...

Page 22: ...B Check start Y N Y Is this weak discharge On the screen Confirm AC connection Confirm Power SW ON Check the power Inverter and panel N Go to 7 4 Y Is the signal jack Correctly connected Check the Connection of Jack N Y Does input source operate Operate AV device N Y Is input selection In used mode Confirm input selection N Y ...

Page 23: ...Go to 7 5 Exchange speaker or speak cable Check start Y N Y Is the sound input jack Correctly connected Check the Connection of sound Jack N Y Is the speaker jack Correctly connected Check the Connection of speaker N Y Is the I601 output Normal Check the AUDIO AMP I601 And I501 N Y ...

Page 24: ... 24 Trouble Shooting 7 7 When Key does not operate Does remote Controller operate Check the I501 Check Key cable and I501 Check start Y N Y Is 2th PIN of P504A Correctly operate Exchange Key PCB N Y ...

Page 25: ...Controller operate Whenever push the button of Remote controller does the 2nd pin Of P501A output normal Check the I501 Check the battery of remote controller Exchange the Key PCB Check start Y N N N Y Y Y Check IR cable and I501 Output of 2nd pin of P501A IR PCB for Remote Control EX Push PR DOWN button ...

Page 26: ...K I307 124LC16B1B IC MEMORY 24LC16B1B LOC PARTCODE PARTNAME DESCRIPTION REMARK IA02 124LC16B1B IC MEMORY 24LC16B1B IC12 1TS0P34838 IC PREAMP TSOP34838SJ ICD07 14C64WBN6 IC EEPROM M24C64 WBN6 JP401 4855062900 DECO HDMI PVC T0 3 BLACK L610 58C0000157 COIL CHOKE CH 470X L620 58C0000157 COIL CHOKE CH 470X LED1 DSPR39MVW LED SPR 39MVW DUAL M231 4852333701 PANEL CTRL 20W2 HIPS BK M231A 4857817300 CLOTH ...

Page 27: ...8 C645 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 C646 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 LOC PARTCODE PARTNAME DESCRIPTION REMARK C647 HCQK331JBA C CHIP CERA 50V CH 330PF J 1608 C648 HCQK331JBA C CHIP CERA 50V CH 330PF J 1608 C649 HCBK104KBA C CHIP CERA 50V X7R 0 1MF K 1608 C650 HCBF224KBA C CHIP CERA 16V X7R 0 22MF K 1608 C651 HCBF224KBA C CHIP CERA 16V X7R 0 22MF K 1608 C652 HCBK104KB...

Page 28: ...09GTA DA34 D3C09GTA CERA DIODE CDS3C09GTA I601 1TDA8932TD IC CHIP AUDIO AMP CLASS D TDA8932T L202 HLC479J00A L CHIP COIL 4 7UH MLF2012 L203 HLC479J00A L CHIP COIL 4 7UH MLF2012 L204 HLC479J00A L CHIP COIL 4 7UH MLF2012 LOC PARTCODE PARTNAME DESCRIPTION REMARK L205 HLC479J00A L CHIP COIL 4 7UH MLF2012 L208 HLB300M04A L CHIP BEAD 30 OHM MPZ 2012 L209 HLB300M04A L CHIP BEAD 30 OHM MPZ 2012 L210 HLC47...

Page 29: ...K OHM J 1608 RA07 HRFT472JBA R CHIP 1 10 4 7K OHM J 1608 LOC PARTCODE PARTNAME DESCRIPTION REMARK RA100 HRFT750JBA R CHIP 1 10 75 OHM J 1608 RA101 HRFT750JBA R CHIP 1 10 75 OHM J 1608 RA108 HRFT101JBA R CHIP 1 10 100 OHM J 1608 RA11 HRFT472JBA R CHIP 1 10 4 7K OHM J 1608 RA114 HRFT101JBA R CHIP 1 10 100 OHM J 1608 RA12 HRFT271JBA R CHIP 1 10 270 OHM J 1608 RA15 HRFT105JBA R CHIP 1 10 1M OHM J 1608...

Page 30: ...09 HRFT103JBA R CHIP 1 10 10K OHM J 1608 RD15 HRFT103JBA R CHIP 1 10 10K OHM J 1608 RD17 HRFT103JBA R CHIP 1 10 10K OHM J 1608 RD20 HRFT103JBA R CHIP 1 10 10K OHM J 1608 RD21 HRFT103JBA R CHIP 1 10 10K OHM J 1608 RD22 HRFT103JBA R CHIP 1 10 10K OHM J 1608 RD28 HRFT103JBA R CHIP 1 10 10K OHM J 1608 RD31 HRFT103JBA R CHIP 1 10 10K OHM J 1608 RD45 HRFT332JBA R CHIP 1 10 3 3K OHM J 1608 RD48 HRFT122JB...

Page 31: ...more then 4MΩ at 500Vdc between primary Live Neutral line and secondary Input AC surge The power supply withstand 300Vrms input for 10 seconds Primary inlet F G to secondary GND 25A for 3second 80mΩ MAX Output Requirements Board Output Minimum Maximum Output Current Condition Voltage output voltage output voltage MIN NOR MAX 24Vdc 22 6Vdc 25 2Vdc 0A 2A 2A 15Vdc 14 0Vdc 15 6Vdc 0A 0 3A 0 6A 9Vdc 7 ...

Page 32: ...022WR 14 Yeonho or Equivalent CN1 1 5 VIN DC Input 24 0V CN1 6 10 GND Power supply return CN1 11 VBRT Bright adjust 0to 5 0V CN1 12 VSLEEP Lamp on Low Lamp off High CN1 13 External PWM pulse input for bright adjust CN1 14 Lamp status Lamp on Low Lamp off High Parameter Symbol Recommendation Units Min R C Max Input supply voltage VIN 21 6 24 0 26 4 V Full bright lamp current IO MAX 4 0 6 5 7 5 mArm...

Page 33: ...verter 10 4 Troubleshooting Backlight doesn t turn on Is voltage of pin 2 of P502 under 3 0V Is P502 correctly connected Check the connection of LIPS Check Main PCB Check start Y N N Y Y Change LIPS or Panel ...

Page 34: ... 34 11 Out Line DLT 20W2 ...

Page 35: ...12 Exploded View 35 DLT 20W2 ...

Page 36: ...SOFTWARE INSTALL UPGRADE ...

Page 37: ...ade requires Service remocon R 30SVC7 Single master Jig EURO Scart Euro cable AC adapter a Please connect Single Master to PC port LPT1 Jig Euro Scart SINGLE MASTER 12V from AC ADAPTER EURO CABLE SOFTWARE INSTALL UPGRADE ...

Page 38: ...SOFTWARE INSTALL UPGRADE 3 2 Please install software Daewoo Flashing DF1_2Setup exe After install please restart computer ...

Page 39: ...SOFTWARE INSTALL UPGRADE 4 4 Please choose IC type for LCD TV N1F 256 AV FULL STEREO 3 After install Daewoo Flashing Tool please run Daewoo Flashing 1 2 ...

Page 40: ...SOFTWARE INSTALL UPGRADE 5 5 Please choose Flash Memory UOC 6 Please choose Interface Single Master ...

Page 41: ...SOFTWARE INSTALL UPGRADE 6 7 Please choose port LPT1 8 Please open HEX FILE ...

Page 42: ... UPGRADE 7 9 Please choose software version depending on LCD Panel for LCD TV 20 panel makers are AUO and LG Philips for 17 LCD TV we use only one type of panel LG Philips 20 AUO Panel BOE Panel Not use yet 20 LG Panel ...

Page 43: ...utton on Service remocon and next press SCREEN button to make UOC OFF Software version 11 Please connect EURO CABLE to LCD TV and to JIG EURO SCART Please supply 12V for JIG EURO SCART 12 Please press Flash button Daewoo Flashing automatically upgrade new software ...

Page 44: ... after upgrade software set again W B values 14 After apply new software please adjust DCXO value Please connect RF signal PAL Nicam Stereo if possible if not please use PAL Stereo but in this case DCXO adjustment should be repeat several times to check if in all trials the values are similar to LCD TV and press SVC button In next step press SEARCH UP button about 2 sec After this on the OSD shoul...

Page 45: ...DAEWOO ELECTRONICS CORP PRINTED DATE Jul 2007 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA ...

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