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DMTech DML-4120S Service Manual

20" wide tft lcd tv (pal)
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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 4 - 1 S e q u e n c e o f F a c to r y m o d e a d ju s tm e n t 1. To enter "F ac tory Mode" P res s the remote- c ontrol keys in this s equenc e DIS P LAY ¢¡...
  • Page 16 DT V W. B A L ¢¡ P C W. B AL P AS S WOR D : - - - - OP TION E E P R OM B US S TOP R E S E T C ONTR OL HE ATR UN 2 0 0 3 - 1 0 - 4 - 9 0 0 5 DT V W.
  • Page 17 4 - 2 - 2 S tr u c tu r e o f F a c to r y m o d e ( D ML - 4 1 2 0 S D ) INC H DT V W. B A L 21INC H WE S T E UR OP E TE XT...
  • Page 18 DT V W. B A L ¢¡ P C W. B AL S ys tem auto power off, then auto power on OP TION If you c hange E P R OM, E E P R OM Mus t this mode done. B US S TOP R E S E T C ONTR OL...

  • Page 19: Troubleshooting

    5. T roubles hooting 5- 1- 1 No P ower (DML - 4120S ) Does proper DC 12V a ppere a t DC ja c k C hec k Ada pter. c onnec ted to J 801 ? Does proper DC 5V C hec k Q802, Q803.
  • Page 20 5. T roubles hooting 5- 1- 2 No P ower (DML - 4120S D) Does proper DC 15V a ppere a t DC ja c k C hec k Ada pter. c onnec ted to J 801 ? Does proper DC 5V C hec k Q802, Q803.
  • Page 21 5- 2- 1 No P ic ture (T V , V IDE O, S - V HS ) DML - 4120S C hec k pin 2(TV), 159, 157(S - C hec k Tuner, VC R VHS ), 1(VIDE O1), 160(VIDE C a ble.
  • Page 22 C hec k Q610 a nd C hec k P in 9, 8 of Q606. rela ted c irc uit of QM61. C hec k S pea ker, P 606. 5- 3- 2 No S ound (DML - 4120S D) C hec k P in 73, 78(TV), P in14, 15(Video C hec k Tuner, VC R...
  • Page 23 6. E lec tric al P art L is t 1- 1. M AI N BOARD BOM [ DM L- 4120S] ( SCART, S/ S TUNER) CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. APM P- 00083A PCB ASS' Y M AI N- PCB ASS' Y( DM L- 3020S, PAL)
  • Page 24 CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. DPRC- 00071A R- CHI P 68Kohm , 5% , 1/ 16W , DA, TP, 1608 RM 62 DPRC- 00039A R- CHI P 270Kohm , 5% , 1/ 16W , DA, TP, 1608 RS51 DPRC- 00008A R- CHI P...
  • Page 25 1- 2. M AI N BOARD BOM [ DM L- 4120S] ( SCART, LG TUNER) CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. APM P- 00083A PCB ASS' Y M AI N- PCB ASS' Y( DM L- 3020S, PAL) DPI C- 00044A I C- VOLTAGE REGULATOR AI C1117A- 33CY/ G960T63U/ AM C1117- 3.
  • Page 26 CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. DPRC- 00060A R- CHI P 47Kohm , 5% , 1/ 16W , DA, TP, 1608 R007, RB24, RB51, R261, R264, R267, R604, R607 DPRC- 00071A R- CHI P 68Kohm , 5% , 1/ 16W , DA, TP, 1608 RM 62 DPRC- 00039A...
  • Page 27 2. FUNCTI ON BOM ( DM L- 4120S) CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. APFR- 00088A PCB ASS' Y CONTROL KEY- PCB ASS' Y( DM L- 3117W ) DPRA- 10068A R- CARBON 680ohm , 5% , 1/ 8W , AA, TP, 1.
  • Page 28 4- 1. ACCESSORY [ DM L- 4120S] ( SCART) CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. LC03- AR010A REM OCON ASS' Y DM L- 3020S, PAL PAL Àü¿ë DP00- P0010B BATTARY AAA * 2 °ø...
  • Page 29 1- 1. M AI N BOARD BOM [ DM L- 4120SD( SCART, LG TUNER) ] CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. APM P- 00110A PCB ASS' Y M AI N- PCB ASS' Y( DM L- 4120SD, PAL) DPI C- 00044A I C- VOLTAGE REGULATOR AI C1117A- 33CY/ G960T63U/ AM C1117- 3.
  • Page 30 CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. DPRC- 00004A R- CHI P 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...
  • Page 31 CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. DPEC- 10006A C- ELECT 10uF, 20% , 16V, GP, TP, 5x11, 5m m 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...
  • Page 32 1- 2. M AI N BOARD BOM [ DM L- 4120SD( SCART, S/ S TUNER) ] CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. APM P- 00110A PCB ASS' Y M AI N- PCB ASS' Y( DM L- 4120SD, PAL) DPI C- 00044A I C- VOLTAGE REGULATOR AI C1117A- 33CY/ G960T63U/ AM C1117- 3.
  • Page 33 CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. DPRC- 00016A R- CHI P 150ohm , 5% , 1/ 16W , DA, TP, 1608 R601 DPRC- 00031A R- CHI P 220ohm , 5% , 1/ 16W , DA, TP, 1608 RB17, R745 DPRC- 00041A R- CHI P...
  • Page 34 CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. DPEC- 10021A C- ELECT 100uF, 20% , 25V, GP, TP, 6. 3x11, 5m m C809, C811, C812 DPEC- 10054A C- ELECT 470uF, 20% , 25V, GP, TP, 10x12. 5, 5m m C602 DPEC- 10086A C- ELECT...
  • Page 35 2. POW ER KEY BOM [ DM L- 4120SD( °ø Åë) ] CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. APKE- 00047A PCB ASS' Y POW ER KEY- PCB ASS' Y( DM L- 3117W D) DPTR- 10009A KSR1002, TO- 92 Q008...
  • Page 36 VN @ c o n n ec to r M w i r e@ bo m @ { d m lM TQRPsd H Ö ë‫ ܐ‬I } CODE NO DESCRI PTI ON SPECI FI CATI ON Q' TY LOCATI ON NO. APSE- 00009A DVD- Loader DSS- 813...
  • Page 37 7-1. Block Diagrams (DML-4120S)
  • Page 38 7-2. Block Diagrams (DML-4120SD)
  • Page 39 8- 1 C O N T R O L & P O W E R & T U N E R POWER TUNER DML- DML4120S TUNE R OPTION R E S IS TE R (L/G) (S /S ) R T01, R T02, R T03, R T06, R T07, R T09 R T04, R T05, R T08, R T10, R T11 R 162(Ohm) R B 09(Ohm)
  • Page 40 8- 2 J A C K & C O N N E C T O R...
  • Page 41 8-3 AMP & SOUND PROCESS...
  • Page 42 8-4 MICOM & MAIN...
  • Page 43 8- 5 C O N T R O L & P O W E R & T U N E R...
  • Page 44 8- 6 J A C K...
  • Page 45 8- 7 P O W E R...
  • Page 46 8- 8 C O N N E C T O R...
  • Page 47 8- 9 M A I N...
  • Page 48 8- 10 A M P 8-10...
  • Page 49 8- 11 A U D I O A M P 8-11...
  • Page 50 8- 12 S O U N D P R O C E S S & M I C O M 8-12...

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Dml-4120sd