Download
Share
Print this page
  1. Manuals
  2. Brands
  3. DMTech Manuals
  4. LCD TV
  5. DML-4120S
  6. Service manual

DMTech DML-4120S Service Manual

20" wide tft lcd tv (pal)
Hide thumbs Also See for DML-4120S:

Advertisement

Quick Links

Download this manual

Advertisement

loading
Need help?

Need help?

Do you have a question about the DML-4120S and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for DMTech DML-4120S

Summary of Contents for DMTech DML-4120S

  • Page 2: Safety Precaution

    1. Precautions Prior to shipment from the factory, the products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

  • Page 3: Safety Notice

    SAFETY NOTICE Handling the LCD Module Safety Precaution 3. If the panel’s surface gets dirty, wipe it with cotton or In case the screen is damaged and the internal liquid a soft cloth. If it is still dirty , try breathing on the leaks, do not suck or drink the internal fluid.
  • Page 4 6. CMOS-LSI circuits are used in the module, so guard 9. Do not disassemble the LCD module. Disassembly cancause malfunctions. against damage from electrostatic discharge. Be sure to wear a wrist or ankle ground when handling the module. 10. If you transport the module, do not use packing 7.
  • Page 15 4. Factory Moode Adjustment Sequence of Factory mode adjustment 1. To enter "Factory Mode" Press the remote-control keys in this sequence DISPLAY ⇒ ① ⇒ ① ⇒ TV/VIDEO 4-2-1 Structure of Factory mode (DML-4120S) DTV W.BAL TEXT ⇒ WEST EUROPE...
  • Page 16 DTV W.BAL ⇒ PC W.BAL PASSWORD : ---- OPTION EEPROM BUS STOP RESET CONTROL HEATRUN 2003-10-4-9005 DTV W.BAL ⇒ PC W.BAL System auto power off, then auto power on OPTION If you change EPROM, EEPROM Must this mode done. BUS STOP RESET CONTROL HEATRUN...
  • Page 17 4-2-2 Structure of Factory mode (DML-4120SD) DTV W.BAL INCH 21INCH WEST EUROPE TEXT WEST EUROPE EAST EUROPE PC W.BAL ⇒ LANG RUSSIAN OPTION CTRY GRK TUR EEPROM ARABIC BUS STOP FARSI RESET HEBREW CONTROL HEATRUN 2003-10-4-9005 AUSTRIA BELGIUM ENGLISH FRANCE FRANCAIS GERMANY DEUTSCH...
  • Page 18 DTV W.BAL PC W.BAL ⇒ System auto power off, then auto power on OPTION If you change EPROM, EEPROM Must this mode done. BUS STOP RESET CONTROL HEATRUN 2003-10-4-9005 DTV W.BAL TW8801 ⇒ PC W.BAL OPTION CTL00 00001010 EEPROM BUS STOP ▲...

  • Page 19: Troubleshooting

    5. Troubleshooting 5-1-1 No Power (DML-4120S) Does proper DC 12V appere at DC jack Check Adapter. connected to J801 ? Does proper DC 5V Check Q802,Q803. appere at Pin 3 of Q803 ? Does proper DC 3.3V Check Q080. appere at Pin 2 of Q080? Does proper DC 3.3V...
  • Page 20 5. Troubleshooting 5-1-2 No Power (DML-4120SD) Does proper DC 15V appere at DC jack Check Adapter. connected to J801 ? Does proper DC 5V Check Q802,Q803. appere at Pin 3 of Q803 ? Does proper DC 3.3V Check Q080. appere at Pin 2 of Q080? Does proper DC 5V Check Q801.
  • Page 21 Check pin 2(TV),15P,157(S-VIDEO) Check Tuner,VCR Cable. 1(SW-CVBS), 160(AV2-CVBS) P11, 16(R,G,B) of Q501 Check Q501 and related circuit of Q501. 5-3-1 No Sound (DML-4120S) Check Pin 73,78(TV),Pin14,15(Video Check Tuner,VCR 2),Pin9,10(Video1) of Cable. QS02 Check QS02 and Check Pin 39,40 of QS02.
  • Page 22 Check Q610 and Check Pin 9,8 of Q606. related circuit of QM61. Check Speaker,P606. 5-3-2 No Sound (DML-4120SD) Check Pin 73,78(TV),Pin14,15(Video Check Tuner,VCR 2),Pin9,10(Video1) of Cable. QS02 Check QS02 and Check Pin 39,40 of QS02. related circuit of QS02. Does proper DC 15V appere at Pin 6,15 of Check L601,L602.

  • Page 23: Electrical Part List

    6. Electrical Part List 1-1.MAIN BOARD BOM [DML-4120S](SCART,S/S TUNER) CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. APMP-00083A PCB ASS'Y MAIN-PCB ASS'Y(DML-3020S, PAL) DPIC-00044A IC-VOLTAGE REGULATOR AIC1117A-33CY/G960T63U/AMC1117-3.3SK,SOT-223/ QB80,Q080,Q851 RC1117S33T/GM1117-3.3ST3 DPIC-00062A IC-TV-TELETEXT DECODER SDA5550M, PMQFP-100 Q001 DPIC-00091A IC-AUDIO AMP TDA7266D,POWER-S020 Q606 DPIC-00094A IC-VOLTAGE REGULATOR AMC1117-3.3SJ,TO-252/RC1117D33,TO-252/GM1117-3.3TC3...
  • Page 24 CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. DPRC-00071A R-CHIP 68Kohm,5%,1/16W,DA,TP,1608 RM62 DPRC-00039A R-CHIP 270Kohm,5%,1/16W,DA,TP,1608 RS51 DPRC-00008A R-CHIP 1Mohm,5%,1/16W,DA,TP,1608 R502 DPRC-00045E R-CHIP ARRAY 33ohm,5%,1/16W,L,CHIP,8P,TP RN01,RN02,RN03,RN04,RN05,RN06,RN07,RN50,RN51,RN52, RN53,RN54,RN55,RN56 DPRC-00058E R-CHIP ARRAY 4.7Kohm,5%,1/16W,L,CHIP,8P,TP RN08 DPRC-00021C R-CHIP 180ohm,5%,1/8W,DA,TP,3216 R255,R256 DPCC-00021A C-CHIP 18pF,10%,50V,X7R,TP,1608 C514 DPCC-00033A C-CHIP 22pF,10%,50V,X7R,TP,1608 CS51,CS52,C515 DPCC-00051A...
  • Page 25 1-2.MAIN BOARD BOM [DML-4120S](SCART,LG TUNER) CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. APMP-00083A PCB ASS'Y MAIN-PCB ASS'Y(DML-3020S, PAL) DPIC-00044A IC-VOLTAGE REGULATOR AIC1117A-33CY/G960T63U/AMC1117-3.3SK,SOT-223/ QB80,Q080,Q851 RC1117S33T/GM1117-3.3ST3 DPIC-00062A IC-TV-TELETEXT DECODER SDA5550M, PMQFP-100 Q001 DPIC-00091A IC-AUDIO AMP TDA7266D,POWER-S020 Q606 DPIC-00094A IC-VOLTAGE REGULATOR AMC1117-3.3SJ,TO-252/RC1117D33,TO-252/GM1117-3.3TC3 Q841...
  • Page 26 CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. DPRC-00060A R-CHIP 47Kohm,5%,1/16W,DA,TP,1608 R007,RB24,RB51,R261,R264,R267,R604,R607 DPRC-00071A R-CHIP 68Kohm,5%,1/16W,DA,TP,1608 RM62 DPRC-00039A R-CHIP 270Kohm,5%,1/16W,DA,TP,1608 RS51 DPRC-00008A R-CHIP 1Mohm,5%,1/16W,DA,TP,1608 R502 DPRC-00045E R-CHIP ARRAY 33ohm,5%,1/16W,L,CHIP,8P,TP RN01,RN02,RN03,RN04,RN05,RN06,RN07,RN50,RN51,RN52, RN53,RN54,RN55,RN56 DPRC-00058E R-CHIP ARRAY 4.7Kohm,5%,1/16W,L,CHIP,8P,TP RN08 DPRC-00021C R-CHIP 180ohm,5%,1/8W,DA,TP,3216 R255,R256 DPCC-00021A C-CHIP 18pF,10%,50V,X7R,TP,1608 C514 DPCC-00033A...
  • Page 27 2.FUNCTION BOM(DML-4120S) CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. APFR-00088A PCB ASS'Y CONTROL KEY-PCB ASS'Y(DML-3117W) DPRA-10068A R-CARBON 680ohm,5%,1/8W,AA,TP,1.8x3.2mm RC01,RC04 DPRA-10099A R-CARBON 1.2Kohm,1%,1/8W,AA,TP,1.8x3.2mm RC02,RC05 DPRA-10031A R-CARBON 2.2Kohm,5%,1/8W,AA,TP,1.8x3.2mm RC03 DPEX-10014A SWITCH-TACT DHT1104RTA,6x6x5mm S001,S002,S003,S004,S005,S006 DPWA-10058A CONNECTOR-WAFER ANGLE,SMAW200-05-YH,2mm PC03 DPWA-10044A CONNECTOR-WAFER ANGLE,SMAW200-06-YH,2mm PC01 DPPB-10161A CONTROL KEY-PCB,PHENOL,1.6T,(DML-3117W,ARRAY 16)
  • Page 28 4-1. ACCESSORY [DML-4120S](SCART) CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. LC03-AR010A REMOCON ASS'Y DML-3020S,PAL PAL 전용 DP00-P0010B BATTARY AAA * 2 공용 자재 LC03-EE003B RF CABLE 1.2m,ANGLE TYPE,PAL PAL 전용 DP00-P0007A RCA CABLE 1.5m 공용 자재 LC03-EE006A CABLE-SCART 1.2m,20P,SHIELD,BLACK,KCA-ET-3-0038 PAL 전용...
  • Page 29 1-1. MAIN BOARD BOM [DML-4120SD(SCART,LG TUNER)] CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. APMP-00110A PCB ASS'Y MAIN-PCB ASS'Y(DML-4120SD, PAL) DPIC-00044A IC-VOLTAGE REGULATOR AIC1117A-33CY/G960T63U/AMC1117-3.3SK,SOT-223/ Q080 RC1117S33T/GM1117-3.3ST3 DPIC-00096A IC-VOLTAGE REGULATOR KIA78L08F,SOT-89/GM78L08-ST89 Q805 DPIC-00098A IC-VOLTAGE REGULATOR KIA7027AF,SOT-89 Q004 DPIC-00133A IC-VOLTAGE REGULATOR KA7809R,TO-252/KIA7809AF,DPAK Q802 DPIC-00165A IC-VOLTAGE REGULATOR KIA7805AF...
  • Page 30 CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. DPRC-00004A R-CHIP 100ohm,5%,1/16W,DA,TP,1608 R005,R006,RB10,R011,R013,R014,RB16,R017,R018,R019, RB20,R021,R022,R026,RB50,RS52,RS53,RB55,RB56,R100, R101,R161,R508,R511,R512,R513,R627,R628,R740,R741, R742,R743 DPRC-00016A R-CHIP 150ohm,5%,1/16W,DA,TP,1608 R601 DPRC-00031A R-CHIP 220ohm,5%,1/16W,DA,TP,1608 RB17,R745 DPRC-00041A R-CHIP 300ohm,5%,1/16W,DA,TP,1608 RB05 DPRC-00050A R-CHIP 360ohm,5%,1/16W,DA,TP,1608 R162 DPRC-00058A R-CHIP 470ohm,5%,1/16W,DA,TP,1608 RB57,R163,R509 DPRC-00064A R-CHIP 560ohm,5%,1/16W,DA,TP,1608 RS55,RB53 DPRC-00069A R-CHIP 680ohm,5%,1/16W,DA,TP,1608 R504 DPRC-00005A...
  • Page 31 CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. DPEC-10006A C-ELECT 10uF,20%,16V,GP,TP,5x11,5mm CA10,CB58,CS67,CS70,CS72,CS74,CS78,CS80,CS85,CS86, CS87,C275,C276,C505,C523,C621,C622,C627, C628,C632,C641,C643 DPEC-10016A C-ELECT 47uF,20%,16V,GP,TP,5x11,5mm C604,C605,C629,C644,C801 DPEC-10062A C-ELECT 47uF,20%,35V,GP,TP,5x11,5mm C603 DPEC-10010A C-ELECT 100uF,20%,16V,GP,TP,6.3x11,5mm C665,C831 DPEC-10007A C-ELECT 100uF,20%,10V,GP,TP,5x11,5mm C002,C004,CS56,C267,C273,C682 DPEC-10061A C-ELECT 220uF,20%,16V,GP,TP,6.3x11,5mm C912,CB10 DPEC-10022A C-ELECT 220uF,20%,10V,GP,TP,6.3x11,5mm CB80,C841,C861 DPEC-10021A C-ELECT 100uF,20%,25V,GP,TP,6.3x11,5mm C809,C811,C812 DPEC-10054A C-ELECT...
  • Page 32 1-2. MAIN BOARD BOM [DML-4120SD(SCART,S/S TUNER)] CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. APMP-00110A PCB ASS'Y MAIN-PCB ASS'Y(DML-4120SD, PAL) DPIC-00044A IC-VOLTAGE REGULATOR AIC1117A-33CY/G960T63U/AMC1117-3.3SK,SOT-223/ Q080 RC1117S33T/GM1117-3.3ST3 DPIC-00096A IC-VOLTAGE REGULATOR KIA78L08F,SOT-89/GM78L08-ST89 Q805 DPIC-00098A IC-VOLTAGE REGULATOR KIA7027AF,SOT-89 Q004 DPIC-00133A IC-VOLTAGE REGULATOR KA7809R,TO-252/KIA7809AF,DPAK Q802 DPIC-00165A IC-VOLTAGE REGULATOR KIA7805AF...
  • Page 33 CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. DPRC-00016A R-CHIP 150ohm,5%,1/16W,DA,TP,1608 R601 DPRC-00031A R-CHIP 220ohm,5%,1/16W,DA,TP,1608 RB17,R745 DPRC-00041A R-CHIP 300ohm,5%,1/16W,DA,TP,1608 RB05 DPRC-00058A R-CHIP 470ohm,5%,1/16W,DA,TP,1608 RB57,R163,R509 DPRC-00064A R-CHIP 560ohm,5%,1/16W,DA,TP,1608 RS55,RB53 DPRC-00069A R-CHIP 680ohm,5%,1/16W,DA,TP,1608 R504,R162 DPRC-00005A R-CHIP 1Kohm,5%,1/16W,DA,TP,1608 RB11,RB12,R012,RB13,R220,R221,R253,R254,R510,R602, R605,R606,R610,R663,R664 DPRC-00047A R-CHIP 3.3Kohm,5%,1/16W,DA,TP,1608 R003,R004,R008,R009,R020,R023,R625,R626 DPRC-00059A R-CHIP 4.7Kohm,5%,1/16W,DA,TP,1608...
  • Page 34 CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. DPEC-10021A C-ELECT 100uF,20%,25V,GP,TP,6.3x11,5mm C809,C811,C812 DPEC-10054A C-ELECT 470uF,20%,25V,GP,TP,10x12.5,5mm C602 DPEC-10086A C-ELECT 220uF,20%,25V,KMG,GP,TP,8x11.5,5mm(105℃) C808,C591 DPEC-10087A C-ELECT 470uF,20%,10V,KMG,GP,TP,6.3x11,5mm(105℃) C802,C803,C805,C530,C544 DPEC-10012A C-ELECT 1000uF,20%,10V,GP,TP,10x12.5,5mm,105℃ C813,C814,C851,C107,C108,C551 DPEX-10141A X-TAL;SMD 6MHZ,30ppm,28-ABX,20PF,150ohm,TP X001 DPEX-00024A X-TAL;SMD 27MHz, 20pF X501,XS51 DPWA-10049A SOCKET-IC,SMD PLCC 32P SOCKET Q002 DPWA-10059A CONNECTOR-WAFER...
  • Page 35 2. POWER KEY BOM [DML-4120SD(공통)] CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. APKE-00047A PCB ASS'Y POWER KEY-PCB ASS'Y(DML-3117WD) DPTR-10009A KSR1002,TO-92 Q008 DPRA-10004A R-CARBON 100ohm,5%,1/8W,AA,TP,1.8x3.2mm RB01 DPRA-10005A R-CARBON 1Kohm,5%,1/8W,AA,TP,1.8x3.2mm RB02 DPRA-10030A R-CARBON 220ohm,5%,1/8W,AA,TP,1.8x3.2mm RL01 DPCA-10001C C-CERAMIC,AXIAL 100nF,+80-20%,50V,Y5V,TP CB01 DPEC-10007A C-ELECT 100uF,20%,10V,GP,TP,5x11,5mm CB02 DPWA-10058A CONNECTOR-WAFER...
  • Page 36 6. CONNECTOR-WIRE BOM [DML-4120SD(공통)] CODE NO DESCRIPTION SPECIFICATION Q'TY LOCATION NO. APSE-00009A DVD-Loader DSS-813 DML-4120SD 와 DML-4120SX 관련 OPTION APSE-00012A DVD-Loader DSS-833(DIVX) DPWI-10171A CONNECTOR-WIRE MH1.25-5Yx2,12P,110mm M502(INVERTER CN1 <--> MAIN P502) DPWI-10182A CONNECTOR-WIRE 20inch,SPEAKER,4P,BN/BK(450mm),RD/WH(650mm) M606(SPEAKER <--> MAIN P606) DPWI-10170A CONNECTOR-WIRE WIRELESS,5P,130mm TRS-200 <-->...
  • Page 37 7-1. Block Diagrams (DML-4120S)
  • Page 38 7-2. Block Diagrams (DML-4120SD)
  • Page 39 8. Schematic Diagrams (DML-4120S) 8-1 CONTROL & POWER & TUNER POWER TUNER DML-DML4120S TUNER OPTION RESISTER (L/G) (S/S) RT01,RT02,RT03,RT06,RT07,RT09 RT04,RT05,RT08,RT10,RT11 R162(Ohm) RB09(Ohm)

  • Page 40: Jack & Connector

    8-2 JACK & CONNECTOR...
  • Page 41 8-3 AMP & SOUND PROCESS...
  • Page 42 8-4 MICOM & MAIN...
  • Page 43 8. Schematic Diagrams (DML-4120SD) 8-5 CONTROL & POWER & TUNER...
  • Page 44 8-6 JACK...
  • Page 45 8-7 POWER...
  • Page 46 8-8 CONNECTOR...
  • Page 47 8-9 MAIN...
  • Page 48 8-10 AMP 8-10...

  • Page 49: Audio Amp

    8-11 AUDIO AMP 8-11...
  • Page 50 8-12 SOUND PROCESS & MICOM 8-12...

This manual is also suitable for:

Dml-4120sd