Symphonic WF203 Service Manual
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Symphonic WF203 Service Manual

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SERVICE MANUAL
20" COLOR TELEVISION
WF203

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  • Page 1 SERVICE MANUAL 20" COLOR TELEVISION WF203...

  • 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

    SPECIFICATIONS <TUNER> ANT. Input ------------------- 75ohm Unbal., F type Reference Level ------------20Vp-p (CRT Green Cathode) Test Input Signal -----------400Hz 30% modulation Description Condition Unit Nominal Limit 1. Intermediate Freq. Picture 45.75 Sound 41.25 2. Peak Picture Sens dBµv CATV dBµv dBµv 3.

  • Page 4: 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 5 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 6 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 7 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 8: 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 9 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 10 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 11: Disassembly Instructions

    CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart Note : This flowchart indicates the disassembly steps for the (1) Order of steps in procedure. When reassembling, cabinet parts, and the CBA in order to gain access to follow the steps in reverse order.These numbers item(s) to be serviced.
  • Page 12 [3] Main CBA Fig. 3 Fig. 1 ANODE CAP Scotch Tape #880 [4] CRT [1] Rear Cabinet Fig. 4 Fig. 2 L6509DC...
  • Page 13 TV Cable Wiring Diagram L691 DEGAUSSING COIL SP802 SP801 CLN802 CLN801 MAIN CBA CN801 CN802 CN691 WH301A FLYBACK TRANSFORMER TUNER CN571 T571 WH501A AC601 AC CORD FOCUS JK1501 SCREEN WH301B WH501B ANODE CN1501 TO CRT GROUND Fig. 5 L6509DC...

  • Page 14: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS How to set up the service mode: General Note: "CBA" is abbreviation for "Circuit Board Assem- Service mode: bly." 1. Use the service remote control unit. NOTE: 2. Turn the power on. (Use main power on the TV Electrical adjustments are required after replacing unit.) circuit components and certain mechanical parts.
  • Page 15 2. Initial Setting 3. Setting for BRIGHT, CONTRAST, COLOR, TINT, and SHARPNESS General data Values 1. Enter the Service mode. (See page 5-1) 2. Press "VOL p" button on the service remote control General unit. Display changes "C/D," "7F," "LANGUAGE," 1.
  • Page 16 4. Black Stretch Control Adjustment Purpose: To show the fine black color. SD Check mode (Factory mode) Symptom of Misadjustment: Black color will not Press "1" buton. appear correctly. Note: Use service remote control unit. 1. Enter the Service mode. (See page 5-1) 2.
  • Page 17 7. H. Position Adjustment 9. V. Position Adjustment Purpose: To obtain correct horizontal position of Purpose: To obtain correct vertical width of screen image. screen image. Symptom of misadjustment: If V. Position is incor- Symptom of Misadjustment: If H. Position is incor- rect, vertical height of image on the screen may not be rect, horizontal position of image on the screen may properly displayed.
  • Page 18 11. Cut-off Adjustment 12. White Balance Adjustment Purpose: To adjust the beam current of R, G, B, and Purpose: To mix red, green and blue beams correctly screen voltage. for pure white. Symptom of Misadjustment: White color may be Symptom of Misadjustment: White becomes bluish reddish, greenish or bluish.
  • Page 19 13. Sub-Brightness Adjustment 4. Adjust the Focus Control on the FBT to obtain clear picture. Purpose: To get proper brightness. The following adjustments normally are not Symptom of Misadjustment: If Sub-Brightness is attempted in the field. Only when replacing the incorrect, proper brightness cannot be obtained by CRT then adjust as a preparation.
  • Page 20 16. Convergence Adjustment 1. Loosen the Ring Lock and align red with blue dots or Crosshatch at the center of the screen by rotat- Purpose: To obtain proper convergence of red, green ing (RB) C.P. Magnets. (See Fig. 7) and blue beams. 2.

  • Page 21: Block Diagram

    BLOCK DIAGRAMS System Control Block Diagram IC333 TV MICON/VIDEO /AUDIO/CHROMA /DEFLECTION RCV101 REMOTE RCV-IN SENSOR (NO CONNECTION) CN301 I2C-OPEN KEY-IN1 SWITCH KEY-IN2 CN301 is used for adjustment at factory INPUT0 IC151 IF/VIDEO BLOCK (MEMORY) 72 I2C-OPEN SCL 6 SDA 5 FROM/TO INPUT0 Q141...
  • Page 22 IF/Video Block Diagram RF/IF SIGNAL VIDEO SIGNAL AUDIO SIGNAL IC33 (IF SIGNAL PROCESS) MAIN CBA CF31 VIDEO 4.5MHz FILTER TRAP CF32 4.5MHz AUDIO BLOCK FILTER EXT.CLK VCO F/B WF16 IF AGC DET FROM/TO INPUT0 SYSTEM CONTROL BLOCK IC333 TV MICON/VIDEO /AUDIO/CHROMA /DEFLECTION VCXO...
  • Page 23 Audio Block Diagram AUDIO SIGNAL IC431 (MTS/SAP AUDIO SIGNAL PROCESS) MAIN CBA FROM STEREO 75uS L-CH OFFSET IF/VIDEO BLOCK FILTER FILTER DE-EMPH CANCEL OFFSET CANCEL MATRIX FILTER R-CH WIDE BAND WIDE BAND WIDE BAND OFFSET (L-R)/SAP FILTER RMS DET EXPAND CANCEL SAP OUT FILTER...
  • Page 24 CRT/H.V. Block Diagram VIDEO SIGNAL IC551 (V-DEFLECTION CONTROL) MAIN CBA WF12 THERMAL DY551 D.Y. WF11 PROTECTION RAMP-OUT DRIVE P-ON-H Q531 (SWITCHING) PULSE V-RAMP-F/B DRIVE FROM/TO IF/VIDEO BLOCK CN571 Q533 SWITCHING Q572 Q571 T572 P-ON-ON H-DRIVE H.DRIVE H.OUTPUT PROTECT-1 PROTECT-2 FROM POWER DEF+B SUPPLY BLOCK T571 F.B.T.
  • Page 25 Power Supply Block Diagram CAUTION ! Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. If Main Fuse (F601) is blown, check to see that all components in the power supply CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, NOTE : circuit are not defective before you connect the AC plug to the AC power supply.

  • Page 26: 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 27 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 28 Main 1/4 Schematic Diagram VIDEO SIGNAL MAIN 1/4 Ref No. Position IC151 IC333 TRANSISTORS Q111 Q131 Q141 Q191 Q321 CONNECTOR CN301 L6509SCM1...
  • Page 29 Main 2/4 Schematic Diagram VIDEO SIGNAL AUDIO SIGNAL MAIN 2/4 Ref No. Position IC431 IC771 IC801 TRANSISTORS Q825 Q831 Q832 Q841 Q851 Q961 CONNECTORS CN801 CN802 L6509SCM2...
  • Page 30 Main 3/4 Schematic Diagram CAUTION ! IF SIGNAL CAUTION: FOR CONTINUED PROTECTION AGAINST RISK Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. NOTE : OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE. VIDEO SIGNAL If Main Fuse (F601) is blown, check to see that all components in the power supply The voltage for parts in hot circuit is measured...
  • Page 31 Main 4/4 & CRT Schematic Diagram MAIN 4/4 Ref No. Position Ref No. Position Ref No. Position TRANSISTORS CONNECTORS Q1511 WH301A IC551 Q1512 TRANSISTORS WH501A Q1521 TEST POINTS Q531 Q1522 Q533 TP302 Q1531 Q571 TP591 Q1532 TP592 Q572 CONNECTORS CONNECTORS TP601 CN1501 CN571...
  • Page 32 Main CBA Top View CAUTION ! BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER CAUTION: FOR CONTINUED PROTECTION AGAINST RISK Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED. OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.
  • Page 33 Main CBA Bottom View CAUTION: FOR CONTINUED PROTECTION AGAINST RISK CAUTION ! BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER 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 34 CRT CBA Top View CRT CBA Bottom View CRT CBA Ref No. Position TRANSISTORS Q1511 Q1512 Q1521 Q1522 Q1531 Q1532 CONNECTORS CN1501 WH301B WH501B TEST POINTS TP500 TP501 WF15 WF14 WF13 Q1511 Q1511 Q1521 Q1521 Q1531 Q1531 Base Collector Base Collector Base Collector...

  • Page 35: 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 36: Wiring Diagram

    WIRING DIAGRAM CN801 CLN801 1 SP-L SP801 SP-GND SPEAKER L-CH CN802 CLN802 1 SP-R SP802 SP-GND SPEAKER R-CH ANODE TU1 TUNER UNIT V501 MAIN CBA BL6509F01012-1 CN691 FOCUS CN1501 T571 SCREEN WH301B WH301A CLN301 BLUE BLUE GREEN GREEN WH501B WH501A CLN501 CRT CBA HEATER 3...

  • Page 37: Ic Pin Function

    IC PIN FUNCTIONS IC333 (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 38 Signal Name Function 70 RCV-IN Input For Remote Control 71 N.U. Not Used White Balance Adjustment 72 I2C OPEN Judgement 73 AFT AFT Voltage Input 74 DG-ON-H Degaussing Coil Control 75 AGC AGC Voltage Input 76 PROTECT 3 Power Supply Protection 77 N.U.
  • Page 39 EXPLODED VIEWS Cabinet SHINWHA V501-1 TAPE SGT-730 Details for DY551 (BLACK) and surrounding parts V501-2 SHINWHA TAPE SGT-730 B-11 DY551 (WHITE) CRT CBA CLN551 V501-3 Scotch Tape #880 L-13 CLN801 L-13 B-13 B-13 DY551 SP801 Scotch CLN802 Tape #880 B-11 SP802 L691 Scotch...
  • Page 40 Packing Some Ref. Numbers are not in sequence. PACKING TAPE TAPE PACKING TAPE 11-3 L6509PEX...

  • Page 41: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a # Ref. No. Description Part No. have special characteristics important to safety. Before Note: replacing any of these components, read carefully the 1. V501 (CRT) HAS COUPLE OF SUBSTITUTIONAL PARTS AND EACH PARTS ALSO HAS MATCHING COMBINATION WITH DY551.
  • Page 42 CRT Warning Label Location CRT Type No. CRT Warning Label 20030523 12-2 L6509CA...

  • Page 43: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. ELECTROLYTIC CAP. 0.47µF/50V M CE1JMASDLR47 Before replacing any of these components, read care- ELECTROLYTIC CAP. 4.7µF/50V M or CE1JMASTL4R7 fully the product safety notice in this service manual.
  • Page 44 Ref. No. Description Part No. Ref. No. Description Part No. C325 CERAMIC CAP.(AX) SL J 12pF/50V CCA1JJTSL120 ELECTROLYTIC CAP. 2.2µF/50V M CE1JMASDL2R2 C328 ELECTROLYTIC CAP. 10µF/50V M or CE1JMASTL100 C444 ELECTROLYTIC CAP. 0.33µF/50V M or CE1JMASTLR33 ELECTROLYTIC CAP. 10µF/50V M CE1JMASDL100 ELECTROLYTIC CAP.
  • Page 45 Ref. No. Description Part No. Ref. No. Description Part No. C582# PCB JUMPER D0.6-P10.0 JW10.0T C658# ELECTROLYTIC CAP. 1000µF/16V M(VR/HC) or CE1CMZNTL102 C583# FILM CAP.(P) 0.1µF/100V J or CMA2AJS00104 ELECTROLYTIC CAP. 1000µF/16V M or CE1CMZNDL102 FILM CAP.(P) 0.1µF/100V J TV CMB2AJS00104 ELECTROLYTIC CAP.
  • Page 46 Ref. No. Description Part No. Ref. No. Description Part No. C812 ELECTROLYTIC CAP. 10µF/50V M or CE1JMASTL100 DIODE 1SS176TPA7 1SS176T ELECTROLYTIC CAP. 10µF/50V M CE1JMASDL100 D513 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 C814 ELECTROLYTIC CAP. 22µF/50V M or CE1JMASTL220 SWITCHING DIODE 1N4148 or NDTZ001N4148 ELECTROLYTIC CAP.
  • Page 47 Ref. No. Description Part No. Ref. No. Description Part No. SWITCHING DIODE 1N4148 or NDTZ001N4148 DIODE 1SS176TPA7 1SS176T DIODE 1SS176TPA7 1SS176T D661 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 IC33 IC:VIF/SIF DETECTOR M61111FP QSZBA0SMB010 SWITCHING DIODE 1N4148 or NDTZ001N4148 IC151 IC:MEMORY AT24C02N-10SC or NSMMA0SAZ012 DIODE 1SS176TPA7 1SS176T...
  • Page 48 Ref. No. Description Part No. Ref. No. Description Part No. TRANSISTOR 2SC2785(H) or QQSH02SC2785 TRANSISTOR 2SC2785(J) or QQSJ02SC2785 TRANSISTOR 2SC2785(J) or QQSJ02SC2785 TRANSISTOR KTC3199(GR) or NQS10KTC3199 TRANSISTOR KTC3199(GR) or NQS10KTC3199 TRANSISTOR KTC3198(GR) or NQS40KTC3198 TRANSISTOR KTC3198(GR) or NQS40KTC3198 TRANSISTOR 2SC3331(T)-AANP or 2SC3331TZ TRANSISTOR 2SC3331(T)-AANP or 2SC3331TZ...
  • Page 49 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 270 Ω CARBON RES. 1/4W J 470 Ω RCX4JATZ0271 R305 RCX4JATZ0471 CARBON RES. 1/4W J 220 Ω CARBON RES. 1/4W J 10k Ω RCX4JATZ0221 R320 RCX4JATZ0103 CARBON RES.
  • Page 50 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 68k Ω CARBON RES. 1/4W J 100 Ω R593# RCX4JATZ0683 R686 RCX4JATZ0101 CARBON RES. 1/4W J 100k Ω CARBON RES. 1/4W J 10 Ω R594# RCX4JATZ0104 R687 RCX4JATZ0100 CARBON RES.
  • Page 51 Ref. No. Description Part No. Ref. No. Description Part No. SW103 TACT SWITCH SKQSAB or SST0101AL038 JS106 PCB JUMPER D0.6-P5.0 JW5.0T TACT SWITCH KSM0612B or SST0101HH003 JS171 PCB JUMPER D0.6-P15.0 JW15.0T TACT SWITCH SKHHAM SST0101AL029 JS191 PCB JUMPER D0.6-P5.0 JW5.0T SW104 TACT SWITCH SKQSAB or SST0101AL038...
  • Page 52 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 1.5k Ω C1511 CERAMIC CAP.(AX) B K 560pF/50V CCA1JKT0B561 R1512 RCX4JATZ0152 CARBON RES. 1/4W J 100 Ω C1512 CERAMIC CAP.(AX) B K 0.01µF/50V 1A1J103TU011 R1514 RCX4JATZ0101 CARBON RES.
  • Page 53 Printed in Japan 2003-06-13 HO...

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