Sylvania 6626LCT Service Manual
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Sylvania 6626LCT Service Manual

26" color lcd television
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SERVICE MANUAL

26" COLOR LCD TELEVISION
6626LCT/6626LG

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Summary of Contents for Sylvania 6626LCT

  • Page 1: Service Manual

    SERVICE MANUAL 26″ COLOR LCD TELEVISION 6626LCT/6626LG...

  • 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 described 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 ---------------------- 75 ohm Unbal., F type Reference Level--------------- 20 Vp-p (LCD Green Cathode) Test Input Signal -------------- 400 Hz 30% modulation Description Condition Unit Nominal Limit Picture 45.75 1. Intermediate Freq. Sound 41.25 CH-2 dBµV 2.

  • 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 3. Design Alteration Warning - Do not alter or add 7. Product Safety Notice - Some electrical and to the mechanical or electrical design of this TV mechanical parts have special safety-related receiver. Design alterations and additions, characteristics which are often not evident from including, but not limited to circuit modifications visual inspection, nor can the protection they give and the addition of items such as auxiliary audio...
  • Page 6 Precautions during Servicing A. Parts identified by the # symbol are critical for L. When connecting or disconnecting the internal safety. connectors, first, disconnect the AC plug from the Replace only with part number specified. AC supply outlet. B. In addition to safety, other parts and assemblies M.
  • Page 7 Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards. 1.

  • Page 8: Standard Notes For Servicing

    STANDARD NOTES FOR SERVICING Circuit Board Indications How to Remove / Install Flat Pack-IC 1. The output pin of the 3 pin Regulator ICs is 1. Removal indicated as shown. With Hot-Air Flat Pack-IC Desoldering Machine: Top View Bottom View 1.
  • Page 9 3. The flat pack-IC on the CBA is affixed with glue, so With Soldering Iron: be careful not to break or damage the foil of each 1. Using desoldering braid, remove the solder from pin or the solder lands under the IC when all pins of the flat pack-IC.
  • Page 10 2. Installation With Iron Wire: 1. Using desoldering braid, remove the solder from 1. Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder the foil of each pin of the flat pack-IC on the CBA flux which is applied to all pins of the flat pack-IC, so you can install a replacement flat pack-IC more you can remove it easily.

  • Page 11: Instructions For Handling Semi- Conductors

    Instructions for Handling Semi- conductors Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1 MΩ) that is properly grounded to remove any static electricity that may be charged on the body.

  • Page 12: Cabinet Disassembly Instructions

    CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart Removal Step/ Remove/*Unhook/ This flowchart indicates the disassembly steps for the Loc. Part Fig. Unlock/Release/ cabinet parts, and the CBA in order to gain access to Note Unplug/Unclamp/ item(s) to be serviced. When reassembling, follow the Desolder steps in reverse order.
  • Page 13 [5] Function CBA [4] Rear Cabinet [3] Stand Cover [2] Stand Hinge [1] Stand Base Plate Fig. D1 L4300DC...
  • Page 14 [8] Jack Holder(A) [6] Chassis Bracket S-10 [9] Shield Box S-10 [7] Jack Holder(D) Fig. D2 [12] PCB Holder S-13 S-11 S-13 [10] Main CBA [11] Digital Main CBA Unit S-12 Fig. D3 L4300DC...
  • Page 15 [18] Front Cabinet S-15 [16] Speaker (R) S-14 S-15 [13] Panel Holder S-14 S-17 S-14 [13] Panel Holder S-16 [15] LED CBA S-18 S-14 [17] Speaker (L) [14] LCD Module S-15 S-14 S-15 S-14 Fig. D4 L4300DC...
  • Page 16 TV Cable Wiring Diagram Function CBA To LCD CN101 Module To LCD Module Main CBA Digital Main CBA Unit CN251 CN1121 CN252 CN1505 CN111 CN1111 CN1112 CN112 CN1116 CN113 CN1113 CN114 CN151A CN804 CN803 LED CBA CN151 To Speaker Fig. D5 L4300DC...

  • Page 17: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: “CBA” is abbreviation for How to set up the service mode: “Circuit Board Assembly.” Service mode: Note: Electrical adjustments are required after 1. Use the service remote control unit. replacing circuit components and certain mechanical parts. It is important to perform 2.

  • Page 18: White Balance Adjustment

    1. Purity Check Mode The following adjustment normally are not attempted in the field. Only when replacing the This mode cycles through full-screen displays of red, LCD Panel then adjust as a preparation. green, blue, and white to check for non-active pixels. 2.

  • Page 19: Auto Calibration

    3. Auto Calibration Purpose: To bring the color adjustment of each component into standard alignment. Symptom of Misadjustment: The color adjustment differs from component to component. 1. Input white raster signal (10%=10 IRE, 100%=100 IRE) from Component 1 Y jack. 2.

  • Page 20: How To Initialize The Lcd Television

    HOW TO INITIALIZE THE LCD TELEVISION How to initialize the LCD television: 1. To turn the power on, press [POWER] button on the normal remote control unit or the unit. 2. Use the service remote control unit. (Refer to “ELECTRICAL ADJUSTMENT INSTRUCTIONS” section.

  • Page 21: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram L4300BLS...
  • Page 22 Video Input Block Diagram L4300BLVIN...
  • Page 23 Video Block Diagram L4300BLV...
  • Page 24 Audio Block Diagram L4300BLA...
  • Page 25 Power Supply Block Diagram L4300BLP...

  • Page 26: Schematic Diagrams / 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 components 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: 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 1/5 Schematic Diagram VOLTAGE CHART CN112 Pin No. Voltage CN114 Pin No. Voltage L4300SCM1...
  • Page 29 Main 2/5 Schematic Diagram VOLTAGE CHART CN113 Pin No. Voltage L4300SCM2...
  • Page 30 Main 3/5 Schematic Diagram VOLTAGE CHART CN111 Pin No. Voltage 32.7 L4300SCM3...
  • Page 31 Main 4/5 Schematic Diagram VOLTAGE CHART CN251 Pin No. Voltage 24.4 24.4 24.4 24.4 24.4 CN252 Pin No. Voltage 24.4 24.4 24.4 24.4 24.4 L4300SCM4...
  • Page 32 Main 5/5 Schematic Diagram CAUTION ! NOTE: Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. CAUTION ! : For continued protection against risk of fire, 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 using replace only with same type 4 A, 125V fuse.
  • Page 33 Function Schematic Diagram VOLTAGE CHART CN101 Pin No. Voltage L4300SCF...
  • Page 34 LED Schematic Diagram L4300SCL...
  • Page 35 Digital Main 1/8 Schematic Diagram L4300SCD1 8-10...
  • Page 36 Digital Main 2/8 Schematic Diagram L4300SCD2 8-11...
  • Page 37 Digital Main 3/8 Schematic Diagram 1 NOTE: 1. The order of pins shown in this diagram is different from that of actual IC1504. 2. IC1504 is divided into four and shown as IC1504 (1/4) ~ IC1504 (4/4) in this Digital Main Schematic Diagram Section. L4300SCD3 8-12...
  • Page 38 Digital Main 4/8 Schematic Diagram 1 NOTE: 1. The order of pins shown in this diagram is different from that of actual IC1504. 2. IC1504 is divided into four and shown as IC1504 (1/4) ~ IC1504 (4/4) in this Digital Main Schematic Diagram Section. L4300SCD4 8-13...
  • Page 39 Digital Main 5/8 Schematic Diagram 1 NOTE: 1. The order of pins shown in this diagram is different from that of actual IC1504. 2. IC1504 is divided into four and shown as IC1504 (1/4) ~ IC1504 (4/4) in this Digital Main Schematic Diagram Section. 8-14 L4300SCD5...
  • Page 40 Digital Main 6/8 Schematic Diagram L4300SCD6 8-15...
  • Page 41 Digital Main 7/8 Schematic Diagram 1 NOTE: 1. The order of pins shown in this diagram is different from that of actual IC1504. 2. IC1504 is divided into four and shown as IC1504 (1/4) ~ IC1504 (4/4) in this Digital Main Schematic Diagram Section. 8-16 L4300SCD7...
  • Page 42 Digital Main 8/8 Schematic Diagram 8-17 L4300SCD8...
  • Page 43 Main CBA Top View CAUTION ! Because a hot chassis ground is present in the power Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. supply circuit, an isolation transformer must be used. CAUTION ! : For continued protection against risk of fire, If Main Fuse (F601) is blown , check to see that all components in the power supply Also, in order to have the ability to increase the input...
  • Page 44 Main CBA Bottom View CAUTION ! Because a hot chassis ground is present in the power Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. supply circuit, an isolation transformer must be used. CAUTION ! : For continued protection against risk of fire, If Main Fuse (F601) is blown , check to see that all components in the power supply Also, in order to have the ability to increase the input...
  • Page 45 Function CBA Top View Function CBA Bottom View BL4300F01011-2 8-20...
  • Page 46 LED CBA Top View LED CBA Bottom View 8-21 BL4300F01011-3...

  • Page 47: Waveforms

    WAVEFORMS WF1 ~ WF7 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) Pin 2 of CN113 Pin 13 of CN114 CVBS 0.2V 20µs VIDEO-Pb 0.2V 20µs Pin 21 of CN114 Pin 14 of CN114 20µs...

  • Page 48: Wiring Diagram

    WIRING DIAGRAM 10-1 L4300WI...

  • Page 49: Exploded Views

    EXPLODED VIEWS Cabinet Function CBA SP802 LCD1 CLN804 CLN803 LED CBA CLN251 SP801 CLN252 AC601 Main CBA Digital Main CBA Unit See Electrical Parts List for parts with this mark. 11-1 L4300CEX...
  • Page 50 Packing Packing Tape Some Ref. Numbers are not in sequence. Packing Tape Packing Tape Tape Packing Tape Packing Tape Packing Tape 11-2 L4300PEX...

  • Page 51: Mechanical Parts List

    SERIAL NO. LABEL L9750UA ---------- Comparison Chart of Models and Marks STAND SHEET L4300UA 1EM423161 ACCESSORIES Model Mark BAG POLYETHYLENE 235X365XT0.03 0EM408420A 6626LCT OWNERS MANUAL L4300UA 1EMN21350 6626LG OWNERS MANUAL L4301UB 1EMN21762 REMOTE CONTROL NF000UD 170/ NF000UD ECNLC401/NF000UD Ref. No. Mark Description Part No.

  • Page 52: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. C508 ELECTROLYTIC CAP . 100µF/16V M CA1C101SP085 Before replacing any of these components, read C509 ALUMINUM ELECTROLYTIC CAP 2200µF/35V CE1GMZNTM222 carefully the product safety notice in this service C510...
  • Page 53 Ref. No. Description Part No. Ref. No. Description Part No. C691# SAFETY CAP . 3300pF/250V CCG2EMPYV332 CN251 PH CONNECTOR TOP 12P B12B-PH-K- J3PHC12JG029 S(LF)(SN) C692 SAFETY CAP . 3300pF/250V CCG2EMPYV332 CN252 PH CONNECTOR TOP 10P B10B-PH-K- J3PHC10JG029 C701 CHIP CERAMIC CAP .(1608) CH J 100pF/50V CHD1JJ3CH101 S(LF)(SN) C702...
  • Page 54 Ref. No. Description Part No. Ref. No. Description Part No. D634 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q703 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P D635 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q704 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P D636# SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q705 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P D637# ZENER DIODE MTZJT-7718B QDTB00MTZJ18 Q706 TRANSISTOR KTC3199-GR-AT/P...
  • Page 55 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 100k Ω CHIP RES. 1/10W F 680 Ω R474 RRXAJR5Z0104 R561 RRXAFR5H6800 CHIP RES. 1/10W J 100k Ω CHIP RES. 1/10W F 220 Ω R475 RRXAJR5Z0104 R562 RRXAFR5H2200 CARBON RES.
  • Page 56 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W 0 Ω CHIP RES. 1/10W J 390 Ω R714 RRXAJR5Z0000 R793 RRXAJR5Z0391 CHIP RES. 1/10W J 75 Ω R715 RRXAJR5Z0750 R794 PCB JUMPER D0.6-P5.0 JW5.0T CHIP RES.(1608) 1/10W 0 Ω METAL OXIDE FILM RES.
  • Page 57 FUNCTION CBA Ref. No. Description Part No. FUNCTION CBA ---------- Consists of the following: CAPACITORS C101 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V CHD1JZ30F104 C102 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V CHD1JZ30F104 C103 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V CHD1JZ30F104 C104 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V...
  • Page 58 6626LCT/6626LG L4300UA/01UB 2006-04-07...
  • Page 59 SUPPLEMENT SERVICE MANUAL Rating Label Model 6626LG has A version and non-A version types. For the A version model, suffix A is printed to the model number as 6626LG A on the Rating Label, and for the non-A version model, suffix A is not printed to the model number.
  • Page 60 Different parts from the non-A version model (6626LG) Ref. No. Description Part No. MECHANICAL PARTS RATING LABEL L4302UC ---------- CARTON L4302UC 1EM322155 OWNERS MANUAL L4302UC 1EMN21880 REMOCON UNIT NF006UD 170/ECNLC301/NF006UD NF006UD 6626LG L4302UC 2006-08-29...

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