Durabrand DCT1303R Service Manual
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Durabrand DCT1303R Service Manual

Durabrand DCT1303R Service Manual

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SERVICE MANUAL
13" COLOR
TELEVISION
DCT1303R
19" COLOR
TELEVISION
DCT1903R

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Summary of Contents for Durabrand DCT1303R

  • Page 1 SERVICE MANUAL 13” COLOR TELEVISION DCT1303R 19” COLOR TELEVISION DCT1903R...

  • Page 2: Table Of Contents

    IMPORTANT SAFETY NOTICE Proper service and repair is important to the safe, reliable operation of all Funai Equipment. The service procedures recommended by Funai and de- scribed in this service manual are effective methods of performing service operations. Some of these service special tools should be used when and as recommended.

  • Page 3: Specifications

    45.75 Sound 41.25 2. Peak Picture Sens dBµv CATV dBµv dBµv 3. AFT Pull In Range ±2.0 ±0.7 (10mV input) <DEFLECTION> [ DCT1303R ] Description Condition Unit Nominal Limit 1. Deflection Freq. Horizontal 15.734 Vertical 2. Linearity Horizontal ±15 Vertical ±10...
  • Page 4 <VIDEO & CHROMA> [ DCT1303R ] Description Condition Unit Nominal Limit 1. Misconvergence Center Side Corner 2. Brightness APL 100% Ft-L 3. Color Temperature °K 9200°K 4. Resolution Horizontal Line Vertical Line [ DCT1903R ] Description Condition Unit Nominal Limit 1.

  • Page 5: Important Safety Precautions

    IMPORTANT SAFETY PRECAUTIONS Prior to shipment from the factory, our products are strictly inspected for 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 6 ing is performed that involves B+, horizontal de- earth ground. If a voltage reading in excess of 1.0V flection or high voltage. Correct operation of the X- is obtained, remove and reinsert the AC power radiation protection circuits also must be recon- plug in the opposite polarity and again measure firmed each time they are serviced.
  • Page 7 Precautions during Servicing 3) Align the lengths of the wires to be connected. In- sert the wires fully into the connector. A. Parts identified by the ( # ) symbol are critical for 4) Use the crimping tool to crimp the metal sleeve at safety.
  • Page 8 Safety Check after Servicing Examine the area surrounding the repaired location Chassis or Secondary Conductor for damage or deterioration. Observe that screws, parts and wires have been returned to original posi- tions. Afterwards, perform the following tests and con- Primary Circuit Terminals firm the specified values in order to verify compliance with safety standards.

  • Page 9: Standard Notes For Servicing

    STANDARD NOTES FOR SERVICING Circuit Board Indications (2) Remove the flat pack-IC with tweezers while ap- plying the hot air. a. The output pin of the 3 pin Regulator ICs is indicat- (3) Bottom of the flat pack-IC is fixed with glue to the ed as shown.
  • Page 10 With Soldering Iron: soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (1) Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder (5) Release the flat pack-IC from the CBA using twee- flux which is applied to all pins of the flat pack-IC, zers.
  • Page 11 2. Installation Instructions for Handling Semiconductors (1) Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA Electrostatic breakdown of the semiconductors may so you can install a replacement flat pack-IC more occur due to a potential difference caused by electro- easily.

  • Page 12: Disassembly Instructions

    CABINET DISASSEMBLY INSTRUCTIONS [ DCT1303R ] Note : (1) Order of steps in procedure. When reassembling, follow the steps in reverse order. These numbers 1. Disassembly Flowchart are also used as the Identification (location) No. of This flowchart indicates the disassembly steps for the parts in figures.
  • Page 13 Front Cabinet [3] Main CBA Control Plate [1] Rear Cabinet Fig. 1 Fig. 3 Anode Cap Degaussing Coil Ground Wire [1] Rear Cabinet Front Cabinet Front Cabinet [2] CRT [4] CRT Control Plate Control Plate Fig. 4 Fig. 2 L6315DC...
  • Page 14 TV Cable Wiring Diagram SP801 L691 DEGAUSSING COIL CLN801 MAIN CBA CN801 WH301A CN691 FLYBACK TRANSFORMER TUNER T571 CN571 WH501A AC601 AC CORD FOCUS JK501 SCREEN WH301B WH501B ANODE CN501 TO CRT GROUND Fig. 5 L6315DC...
  • Page 15 [ DCT1903R ] Note : (1) Order of steps in procedure. When reassembling, follow the steps in reverse order.These numbers 1. Disassembly Flowchart are also used as the Identification (location) No. of This flowchart indicates the disassembly steps for the parts in figures.
  • Page 16 Front Cabinet [3] Main CBA Control Plate [1] Rear Cabinet Fig. 3 Fig. 1 Anode Cap [1] Rear Cabinet Degaussing Degauss Holder Coil [2] CRT Ground Wire Front Cabinet Front Cabinet [4] CRT Degauss Holder Control Plate Control Plate Fig. 2 Fig.
  • Page 17 TV Cable Wiring Diagram SP801 L691 DEGAUSSING COIL CLN801 MAIN CBA CN801 WH301A CN691 FLYBACK TRANSFORMER TUNER T571 CN571 WH501A AC601 AC CORD FOCUS JK501 SCREEN WH301B WH501B ANODE CN501 TO CRT GROUND Fig. 5 L6315DC...

  • Page 18: Electrical Adjustment Instructions

    CODE, STEREO, VIDEO TONE, FM-MODE, V- OUT." 1. NTSC Pattern Generator (Color Bar W/White Window, Red Color, Dot Pattern, Gray 1. DC 105V Adjustment (DCT1303R) Scale, Monoscope, Multi-Burst) Purpose: To obtain correct operation. 2. DC Voltmeter Symptom of Misadjustment: The picture is dark and 3.
  • Page 19 2. Black Stretch Control Adjustment 3-2. Setting for CONTRAST, COLOR, TINT, V-TINT and Purpose: To show the fine black color. SHARP data Values Symptom of Misadjustment: Black color will not appear correctly. General Note: Use service remote control unit. 1. Enter the Service mode. (See page 5-1) 1.
  • Page 20 4. Black Level Adjustment 6. V. Position Adjustment Purpose: Set Black Level Purpose: To obtain correct vertical width of screen image. Symptom of Misadjustment: If Black level is incor- Symptom of misadjustment: If V. Position is incor- rect, Proper brightness can not be obtained by adjust- rect, vertical height of image on the screen may not be ing the Brightness Control.
  • Page 21 8. Cut-off Adjustment 9. White Balance Adjustment Purpose: To adjust the beam current of R, G, B, and Purpose: To mix red, green and blue beams correctly for pure white. screen voltage. Symptom of Misadjustment: White becomes bluish Symptom of Misadjustment: White color may be or reddish.
  • Page 22 10. Sub-Brightness Adjustment The following 2 adjustments normally are not attempted in the field. Only when replacing the Purpose: To get proper brightness. CRT then adjust as a preparation. Symptom of Misadjustment: If Sub-Brightness is 12. Purity Adjustment incorrect, proper brightness cannot be obtained by adjusting the Brightness Control.
  • Page 23 13. Convergence Adjustment Purpose: To obtain proper convergence of red, green and blue beams. Symptom of Misadjustment: If Convergence Adjust- ment is incorrect, the edge of white letters may have color edges. Test Point Adj. Point Mode Input C.P . Magnet Dot Pattern (RB,) C.P .

  • Page 24: Block Diagram

    BLOCK DIAGRAMS IF/Video/System Control Block Diagram RF/IF SIGNAL VIDEO SIGNAL AUDIO SIGNAL IC31 (IF SIGNAL PROCESS) MAIN CBA CF31 VIDEO 4.5MHz FILTER TRAP CF32 4.5MHz AUDIO/POWER TU-AUDIO FILTER CONTROL BLOCK IF AGC DET EXT.CLK VCO F/B WF16 FROM/TO AUDIO/POWER IC111 X301 CONTROL BLOCK TV MICON/VIDEO...
  • Page 25 Audio/Power Control Block Diagram AUDIO SIGNAL IC111 TV MICON/VIDEO /AUDIO/CHROMA /DEFLECTION P-ON-H FROM/TO IF/VIDEO /SYSTEM CONTROL JK801 BLOCK EARPHONE TU-AUDIO JACK IC801 (AMP) JK702 AUDIO-IN CN801 CLN801 LINE SPEAKER 1 OUTPUT TUNER SP-GND 2 A-MUTE-H MUTE SP801 SPEAKER +8V CTRL POWER MANAGE.
  • Page 26 CRT/H.V. Block Diagram VIDEO SIGNAL IC551 (V-DEFLECTION CONTROL) MAIN CBA WF12 THERMAL DY551 D.Y. WF11 PROTECTION V-DRIVE DRIVE PROTECT-1 V-RAMP-F/B PULSE FROM/TO IF/VIDEO DRIVE /SYSTEM CONTROL BLOCK CN571 Q572 Q571 T572 H-DRIVE H.DRIVE H.OUTPUT PROTECT-2 FROM POWER DEF+B SUPPLY BLOCK T571 F.B.T.
  • Page 27 D605 - D608 T601 4A/125V LINE BRIDGE FILTER RECTIFIER AC601 AC CORD AL+33V CN691 DEF +B DG691 DEGAUSSING COIL JS601 PS691 DCT1303R BACK-UP +5V CTRL2 Q111 (FROM PIN18 OF IC111) Q671 AL+5V SWITCHING SWITCHING Q321 AL+9V SWITCHING Q601 SWITCHING AL+12V Q681 P-ON+8V...

  • Page 28: Schematic Diagram / Cba's And Test Points

    SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS Standard Notes Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement compo- nents rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in this manual and its supplements;...
  • Page 29 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE_A,_V FUSE. ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE_A,_V. 2.
  • Page 30 Main 1/3 Schematic Diagram VIDEO SIGNAL AUDIO SIGNAL MAIN 1/3 Ref No. Position IC111 IC151 IC801 TRANSISTORS Q111 Q321 CONNECTORS CN301 CN801 L6415SCM1...
  • Page 31 Main 2/3 Schematic Diagram CAUTION ! IF SIGNAL Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. CAUTION: FOR CONTINUED PROTECTION AGAINST RISK NOTE : If Main Fuse (F601) is blown, check to see that all components in the power supply OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.
  • Page 32 Main 3/3 & CRT Schematic Diagram MAIN 3/3 Ref No. Position Ref No. Position TRANSISTORS IC551 Q501 TRANSISTORS Q502 Q571 Q503 Q572 CONNECTORS CONNECTORS CN501 CN571 WH301B WH301A WH501B WH501A TEST POINTS VIDEO SIGNAL TP300 TP601 L6415SCM3...
  • Page 33 Main CBA Top View CAUTION ! CAUTION: FOR CONTINUED PROTECTION AGAINST RISK BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE. SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
  • Page 34 Main CBA Bottom View CAUTION: FOR CONTINUED PROTECTION AGAINST RISK BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER CAUTION ! OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE. Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
  • Page 35 CRT CBA Top View CRT CBA Bottom View CRT CBA Ref No. Position TRANSISTORS Q501 Q502 Q503 CONNECTORS CN501 WH301B WH501B WF14 WF15 Q502 Q502 Q501 Q501 Base Base Collector Collector WF13 Q503 Collector Q503 Base 7-13 7-14 BL6400F01013-2...

  • Page 36: Waveforms

    WAVEFORMS Input: NTSC Color Bar Signal (with 1kHz Audio Signal) INITIAL POSITION: Unplug unit from AC outlet for at least 5 minutes. reconnect to AC outlet and then turn power on. WF1 ~ WF16 = Waveforms to be observed at (Brightness---Center Color---Center Tint --- Center Contrast---Approx 70%) Waveform check points.

  • Page 37: Wiring Diagram

    WIRING DIAGRAM CN801 CLN801 SPEAKER SP801 SPEAKER SP-GND ANODE TU1 TUNER UNIT V501 MAIN CBA BL6400F01013-1 CN691 CLN551 FOCUS CN501 T571 SCREEN WH301B WH301A CLN301 GREEN GREEN BLUE BLUE WH501B WH501A CLN501 +160V 1 +160V CRT CBA 2 GND BL6400F01013-2 HEATER HEATER DY551...

  • Page 38: Ic Pin Function

    IC PIN FUNCTIONS IC111(TV Micro Computer) Signal Name Function Signal Name Function 35 N.U. Not Used 36 N.U. Not Used 37 V RAMP F/B V Ramp Feed Back N.U. Not Used 38 V RAMP OUT Vertical Output N.U. Not Used 39 V RAMP CAP V Ramp OSC Capacitor N.U.
  • Page 39 Signal Name Function 71 N.U. Not Used White Balance Adjustment 72 I2C OPEN Judgement 73 AFT AFT Voltage Input 74 N.U. Not Used 75 AGC AGC Voltage Input 76 PROTECT 3 Power Supply Protection 77 N.U. Not Used 78 FM-SW Switching IF IC VCO 79 P-ON-H Output for P-ON-H...
  • Page 40 EXPLODED VIEWS Cabinet [ DCT1303R ] SHINWHA TAPE SGT-730 V501-1 (BLACK) Details for DY551 SHINWHA and surrounding parts TAPE SGT-730 DY551 (WHITE) V501-2 ANODE CAP Part of Flyback CRT CBA Transformer CLN801 DG691 CLN551 DY551 SP801 SCOTCH TAPE #880 V501...
  • Page 41 Cabinet [ DCT1903R ] SHINWHA TAPE SGT-730 V501-1 (BLACK) Details for DY551 SHINWHA and surrounding parts TAPE SGT-730 DY551 (WHITE) V501-2 ANODE CAP Part of Flyback SCOTCH Transformer TAPE #880 CLN801 SCOTCH CLN551 TAPE #880 DY551 CRT CBA SP801 DG691 SCOTCH TAPE #880 MAIN CBA...
  • Page 42 Packing [ DCT1303R ] PACKING TAPE TAPE PACKING TAPE 11-5 L6315PEX...
  • Page 43 Packing [ DCT1903R ] Some Ref. Numbers are not in sequence. TAPE PACKING TAPE 11-6 L6415PEX...

  • Page 44: Mechanical Parts List

    TCRT190CP036 not available. V501-1 C.P .MAGNET JH225-FN-00 XM04000BV003 V501-2 WEDGE FT-00110W or XV10000T4001 WEDGE DB25SR XV10000D9001 DCT1303R CRT TYPE B DY551# DEFLECTION YOKE LLBY00ZSY002 or LLBY00ZSY002 Ref. No. Description Part No. DEFLECTION YOKE CDY -M1456S or LLBY00ZQS008 FRONT CABINET L1300UA...
  • Page 45 Ref. No. Description Part No. Ref. No. Description Part No. V501# CRT A34JQQ093X TCRT190MS010 DY551# DEFLECTION YOKE KDY3MDA84X or LLBY00ZMS013 V501-1 C.P .MAGNET JH225-FN-00 XM04000BV003 DEFLECTION YOKE LLBY00ZSY006 or LLBY00ZSY006 V501-2 WEDGE FT-00110W or XV10000T4001 DEFLECTION YOKE CDY -M2019F LLBY00ZQS004 WEDGE DB25SR XV10000D9001 V501#...
  • Page 46 CRT Warning Label Location DCT1303R DY551: Deflection V501: CRT Type No. V501: CRT Part No. CRT Type No. Yoke Part No. CRT Warning LLBY00ZMS011 A34AGT13X TCRT190CP036 Label LLBY00ZSY005 LLBY00ZSY002 LLBY00ZQS008 A34KQW42X TCRT190SM013 LLBY00ZMS006 LLBY00ZMS027 LLBY00ZSM008 LLBY00ZMS005 A34JLL90X(W) TCRT190QS015 LLBY00ZQS001 LLBY00ZSY003...

  • Page 47: Electrical Parts List

    CE1JMASTL100 ELECTROLYTIC CAP . 10µF/50V M CE1JMASDL100 Model Mark C113 CHIP CERAMIC CAP . F Z 0.1µF/25V CHD1EZB0F104 DCT1303R C114 FILM CAP .(P) 0.001µF/50V J or CMA1JJS00102 FILM CAP .(P) 0.001µF/50V J CA1J102MS029 DCT1903R C115 ELECTROLYTIC CAP . 0.1µF/50V M or CE1JMASTLR10 ELECTROLYTIC CAP .
  • Page 48 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. ELECTROLYTIC CAP . 10µF/50V M CE1JMASDL100 C581# CERAMIC CAP . LB 680pF/2K or CA3D681KG004 C328 ELECTROLYTIC CAP . 10µF/50V M or CE1JMASTL100 CERAMIC CAP . BN 680pF/2KV or CCD3DKA0B681 ELECTROLYTIC CAP .
  • Page 49 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. ELECTROLYTIC CAP . 1000µF/16V M or CE1CMZPDL102 RECTIFIER DIODE ERB12-06 QDQZ0ERB1206 ELECTROLYTIC CAP . 1000µF/16V M CE1CMZADL102 D561# SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 C667 ELECTROLYTIC CAP . 1µF/50V M or CE1JMASTL1R0 SWITCHING DIODE 1N4148 NDTZ001N4148...
  • Page 50 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. ZENER DIODE DZ-6.8BSBT265 NDTB0DZ6R8BS TRANSISTORS D666 ZENER DIODE MTZJT-7736B or QDTB00MTZJ36 TRANSISTOR 2SC2785(F) or QQSF02SC2785 ZENER DIODE DZ-36BSBT265 NDTB00DZ36BS TRANSISTOR 2SC2785(H) or QQSH02SC2785 D671# SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTOR 2SC2785(J) or QQSJ02SC2785...
  • Page 51 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W J 100 Ω CHIP RES. 1/10W J 0 Ω RRXAJB5Z0101 R342 RRXAJB5Z0000 CHIP RES.(1608) 1/10W J 100 Ω CHIP RES.(1608) 1/10W J 6.8k Ω RRXAJB5Z0101 R344 RRXAJB5Z0682 CHIP RES.(1608) 1/10W J 2.2k Ω...
  • Page 52 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CARBON RES. 1/4W J 390 Ω or METAL OXIDE FILM RES. 1W J 56k Ω R578 RCX4JATZ0391 R668# RN01563DP003 CARBON RES. 1/6W J 390 Ω CARBON RES. 1/4W J 3.3k Ω RCX6JATZ0391 R671 RCX4JATZ0332...
  • Page 53 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. AC CORD A0A0280-007 or WAC0172LTE04 SAW FILTER SAFGM45M7VHHZC0B03 FBB456PMR008 AC CORD PB8K9F9110A-057 WAC0172LW008 T571# FLYBACK TRANSFORMER JF0501-2418 LTF00CPXB026 BC101 BEAD INDUCTORS FBR07HA121TB-00 LLBF00ZTU021 FLYBACK TRANS BSC21-2016S or LTF00CPS2040 BC571 BEAD INDUCTORS FBA04HA600VB-00 LLBF00STU026...
  • Page 54 Ref. No. Mark Description Part No. METAL OXIDE FILM RES. 1W J 15k Ω RN01153DP003 METAL OXIDE FILM RES. 1W J 15k Ω or R502 RN01153ZU001 METAL OXIDE FILM RES. 1W J 15k Ω RN01153DP003 METAL OXIDE FILM RES. 1W J 15k Ω or R503 RN01153ZU001 METAL OXIDE FILM RES.

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