Sylvania 6620LE Service Manual
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Sylvania 6620LE Service Manual

Sylvania 6620LE Service Manual

20” color lcd television
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SERVICE MANUAL
20" COLOR LCD TELEVISION
6620LE

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  • Page 1 SERVICE MANUAL 20” COLOR LCD TELEVISION 6620LE...

  • 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. Color Killer Sens. CH-2 dBµV CH-10 dBµV CH-55 dBµV...

  • 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 How to Remove / Install Flat Pack-IC a. The output pin of the 3 pin Regulator ICs is indicat- 1. Removal ed as shown. With Hot-Air Flat Pack-IC Desoldering Machine: (1) Prepare the hot-air flat pack-IC desoldering ma- Top View Bottom View chine, then apply hot air to the Flat Pack-IC (about...
  • 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 remov- all pins of the flat pack-IC.
  • Page 10 2. Installation (4) Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply (1) Using desoldering braid, remove the solder from soldering iron to center of the flat pack-IC and heat the foil of each pin of the flat pack-IC on the CBA up.
  • Page 11 Instructions for Handling Semiconductors Electrostatic breakdown of the semiconductors may occur due to a potential difference caused by electro- static charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1MΩ) that is prop- erly grounded to remove any static electricity that may be charged on the body.

  • Page 12: Cabinet Disassembly Instructions

    CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart 2. Disassembly Method This flowchart indicates the disassembly steps for the REMOVAL cabinet parts and the CBA in order to gain access to REMOVE/ item(s) to be serviced. When reassembling, follow the LOC. PART *UNHOOK/UNLOCK/ Fig.
  • Page 13 (S-1) (S-1) (S-1) (S-2) (S-1) (S-1) (S-1) [1] Rear Cabinet (S-1) (S-1) Fig. D1 [10] Front Cabinet (S-8) (S-8) [6] Function CBA [5] LCD Main CBA & Liquid Crystal Panel Unit (S-10) (S-7) (S-7) [8] Speaker L [2] Jack Holder (S-7) [9] Speaker R (S-11)
  • Page 14 TV Cable Wiring Diagram To Liquid Crystal Panel CN310A CN311A CN312A LCD Main CN101B CN102B CN103B CBA Unit CN490 CN51 CN450 CN53 CN101A CN102A CN103A CN481 CLN481 CN801 CN470 Main CBA CN460 Inverter CBA CN802 To Speaker To Speaker CLN51B CLN53 Function CBA IR Sensor CBA...

  • Page 15: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS 1. Initial Setting General Note: "CBA" is abbreviation for "Circuit Board Assem- General bly." Enter the Service mode. NOTE: Electrical adjustments are required after replacing Set the each initial data as shown on tabel 1 below. circuit components and certain mechanical parts. It is important to perform these adjustments only after all Table 1: Initial Data repairs and replacements have been completed.
  • Page 16 2. +B Adjustment BUTTON DATA ITEM (on the service Purpose: To obtain correct operation. VALUE remote control) Symptom of Misadjustment: The picture is dark and NORMAL the unit does not operate correctly. DARK Test Point Adj. Point SAIDO TP401 (+B) VR649 C-SAIDO TP300 (GND)
  • Page 17 4. Flicker Adjustment The following adjustment normally are not attempted in the field. Only when replacing the Adjustment Point: VR201 (LCD Main CBA Unit) LCD Panel then adjust as a preparation. LCD Main CBA Unit 5. White Balance Adjustment Purpose: To mix red, green and blue beams correctly VR201 for pure white.

  • Page 18: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram L0311BLS...
  • Page 19 IF/Video Block Diagram L0311BLIF...
  • Page 20 Audio Block Diagram L0311BLA...
  • Page 21 LCD Block Diagram L0311BLLCD...
  • Page 22 Power Supply Block Diagram L0311BLP...
  • Page 23 LCD Backlight Block Diagram L0311BLLB...

  • Page 24: 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 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 25 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 26 Main 1/4 Schematic Diagram MAIN 1/4 Ref No. Position IC502 IC503 IC504 IC505 TRANSISTORS Q501 Q502 Q503 Q504 Q505 Q506 Q507 Q508 Q509 Q510 Q511 Q512 Q513 CONNECTORS CN51 CN52 CN53 CN101A CN102A L0311SCM1...
  • Page 27 Main 2/4 Schematic Diagram VIDEO SIGNAL AUDIO SIGNAL MAIN 2/4 Ref No. Position IC11 IC851 IC852 TRANSISTORS Q709 TEST POINT TP300 L0311SCM2...
  • Page 28 Main 3/4 Schematic Diagram VIDEO SIGNAL AUDIO SIGNAL MAIN 3/4 Ref No. Position IC781 IC801 TRANSISTORS Q701 Q702 Q703 Q704 Q705 Q706 Q707 Q708 Q802 Q803 CONNECTORS CN103A CN801 CN802 L0311SCM3...
  • Page 29 Main 4/4 Schematic Diagram CAUTION ! NOTE : CAUTION: FOR CONTINUED PROTECTION AGAINST RISK Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. The voltage for parts in hot circuit is OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE. If Main Fuse (F601) is blown, check to see that all components in the power supply measured using hot GND as a ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE...
  • Page 30 Inverter Schematic Diagram INVERTER Ref No. Position IC401 IC402 IC403 TRANSISTORS Q403 Q411 Q412 Q421 Q426 Q433 Q434 Q451 Q452 Q454 Q455 Q461 Q462 Q464 Q465 Q471 Q472 Q491 Q492 CONNECTORS CN450 CN460 CN470 CN490 CN481 7-11 7-12 L0311SCI...
  • Page 31 Function Schematic Diagram 7-13 7-14 L0311SCF...
  • Page 32 IR Sensor Schematic Diagram 7-15 7-16 L0311SCIR...
  • Page 33 LCD Main 1/3 Schematic Diagram VIDEO SIGNAL LCD 1/3 Ref No. Position IC333 CONNECTORS CN102B CN310A CN311A 7-17 7-18 L0311SCLCD1...
  • Page 34 LCD Main 2/3 Schematic Diagram VIDEO SIGNAL LCD 2/3 Ref No. Position IC151 IC171 TRANSISTOR Q102 CONNECTORS CN103B CN104 CN105 7-19 7-20 L0311SCLCD2...
  • Page 35 LCD Main 3/3 Schematic Diagram LCD 3/3 Ref No. Position IC201 TRANSISTOR Q201 CONNECTORS CN101B CN312A DIODE D203 VARIABLE RESISTOR VR201 7-21 7-22 L0311SCLCD3...
  • Page 36 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 37 Main CBA Bottom 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 38 Function CBA Top View IR Sensor CBA Top & Bottom View BL0300F01011-2 BL0300F01011-3 Function CBA Bottom View BL0300F01011-2 7-27 7-28...
  • Page 39 Inverter CBA Top View INVERTER CBA Ref No. Position IC401 IC402 IC403 TRANSISTORS Q403 Q411 Q412 Q421 Q426 Q433 Q434 Q451 Q452 Q454 Q455 Q461 Q462 Q464 Q465 Q471 Q472 Inverter CBA Bottom View Q491 Q492 CONNECTORS CN450 CN460 CN470 CN490 CN481 7-29...

  • Page 40: Waveforms

    WAVEFORMS WF1 ~ WF12 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) 1DIV: 1.0V 10 s 1DIV: 1.0V 10 s 1DIV: 200mV 20 s Pin 5 of CN310A Pin 37 of CN310A Pin 19 of CN103A 1DIV: 1.0V 20ns...

  • Page 41: Wiring Diagram

    WIRING DIAGRAM L0311WI...
  • Page 42 EXPLODED VIEWS Cabinet Function CBA CLN802 LCD Main CBA & Liquid Crystal Panel Unit SP802 CLN801 Main CBA SP801 IR Sensor CBA Inverter CBA AC601 See Electrical Parts List for parts with this mark. 10-1 10-2 L0311CEX...
  • Page 43 Packing Some Ref. Numbers are not in sequence. Packing Tape Packing Tape Tape Tape Packing Tape Packing Tape Packing Tape 10-3 L0311PEX...

  • Page 44: 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 DRY BATTERY(SUNRISE) R6SSE/2S XB0M451MS002 replacing any of these components, read carefully the SHEET RETURN STOP L6101UB 0EM407077 product safety notice in this service manual.

  • Page 45: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. CERAMIC CAP .(AX) Y M 0.01µF/16V CCA1CMT0Y103 Before replacing any of these components, read care- CHIP CERAMIC CAP .(1608) CH J 47pF/50V CHD1JJ3CH470 fully the product safety notice in this service manual.
  • Page 46 Ref. No. Description Part No. Ref. No. Description Part No. ELECTROLYTIC CAP . 2200µF/25V M CE1EMZNTL222 C784 CHIP CERAMIC CAP .(1608) B K 0.01µF/50V CHD1JK30B103 C635 ELECTROLYTIC CAP . 470µF/10V M or CE1AMASTL471 C785 ELECTROLYTIC CAP . 100µF/6.3V M H7 CE0KMASSL101 ELECTROLYTIC CAP .
  • Page 47 Ref. No. Description Part No. Ref. No. Description Part No. D484 PCB JUMPER D0.6-P5.0 JW5.0T RECTIFIER DIODE ERB12-06 QDQZ0ERB1206 D501 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D606 DIODE 1N5397-B or NDLZ001N5397 SWITCHING DIODE 1N4148 NDTZ001N4148 RECTIFIER DIODE ERB12-06 QDQZ0ERB1206 D502 ZENER DIODE MTZJT-7724B or QDTB00MTZJ24 D607 DIODE 1N5397-B or...
  • Page 48 Ref. No. Description Part No. Ref. No. Description Part No. D703 ZENER DIODE MTZJT-778.2B or QDTB0MTZJ8R2 L632 INDUCTOR 22µH-J-26T or LLAXJATTU220 ZENER DIODE DZ-8.2BSBT265 NDTB0DZ8R2BS INDUCTOR 22µH-K-26T LLAXKDTKA220 D715 ZENER DIODE MTZJT-778.2B or QDTB0MTZJ8R2 L701 PCB JUMPER D0.6-P5.0 JW5.0T ZENER DIODE DZ-8.2BSBT265 NDTB0DZ8R2BS L781 PCB JUMPER D0.6-P5.0...
  • Page 49 Ref. No. Description Part No. Ref. No. Description Part No. TRANSISTOR 2SC2785(J) or QQSJ02SC2785 TRANSISTOR 2SC3331(U)-AANP or 2SC3331UZ TRANSISTOR KTC3199(GR) or NQS10KTC3199 TRANSISTOR 2SC1815-GR(TPE2) QQS102SC1815 TRANSISTOR KTC3198(GR) or NQS40KTC3198 Q702 TRANSISTOR 2SC2785(F) or QQSF02SC2785 TRANSISTOR 2SC3331(T)-AANP or 2SC3331TZ TRANSISTOR 2SC2785(H) or QQSH02SC2785 TRANSISTOR 2SC3331(U)-AANP or 2SC3331UZ...
  • Page 50 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W J 10k Ω TRANSISTOR 2SA1318(T)-AANP or 2SA1318TZ R522 RRXAJR5Z0103 CHIP RES.(1608) 1/10W J 10k Ω TRANSISTOR 2SA1318(U)-AANP or 2SA1318UZ R523 RRXAJR5Z0103 CHIP RES.(1608) 1/10W J 100k Ω TRANSISTOR 2SA1015-GR(TPE2) QQS102SA1015 R524...
  • Page 51 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 5.6k Ω CARBON RES. 1/2W J 100 Ω or R650 RCX4JATZ0562 RCX2JZPZ0101 CARBON RES. 1/4W J 12k Ω CARBON RES. 1/2W J 100 Ω R651 RCX4JATZ0123 RCX2101KA013 CARBON RES.
  • Page 52 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W J 2.7k Ω CERAMIC FILTER 4.5MHz FBB455PMS001 RRXAJR5Z0272 CHIP RES.(1608) 1/10W J 4.7k Ω CLN481 WIRE ASSEMBLY 10P WIRE ASSEMBLY WX1L0300-001 RRXAJR5Z0472 CHIP RES.(1608) 1/10W J 6.8k Ω F601# FUSE 4.00A/125V or PAGU20CAG402...
  • Page 53 Ref. No. Description Part No. Ref. No. Description Part No. ELECTROLYTIC CAP . 10µF/35V M CA1G100NC186 SWITCHING DIODE 1N4148 NDTZ001N4148 C422 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 D402 ZENER DIODE MTZJT-779.1B or QDTB0MTZJ9R1 C423 ELECTROLYTIC CAP . 10µF/35V M or CA1G100SP068 ZENER DIODE DZ-9.1BSBT265 NDTB0DZ9R1BS...
  • Page 54 Ref. No. Description Part No. Ref. No. Description Part No. D470 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTOR KTC3198(GR) or NQS40KTC3198 SWITCHING DIODE 1N4148 NDTZ001N4148 TRANSISTOR 2SC3331(T)-AANP or 2SC3331TZ D471 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTOR 2SC3331(U)-AANP or 2SC3331UZ SWITCHING DIODE 1N4148 NDTZ001N4148 TRANSISTOR 2SC1815-GR(TPE2) QQS102SC1815...
  • Page 55 Ref. No. Description Part No. Ref. No. Description Part No. TRANSISTOR 2SC2785(H) or QQSH02SC2785 R442 PCB JUMPER D0.6-P5.0 JW5.0T CHIP RES.(1608) 1/10W J 10k Ω TRANSISTOR 2SC2785(J) or QQSJ02SC2785 R443 RRXAJR5Z0103 CHIP RES.(1608) 1/10W 0 Ω TRANSISTOR KTC3199(GR) or NQS10KTC3199 R445 RRXAZR5Z0000 TRANSISTOR KTC3198(GR) or...
  • Page 56 Ref. No. Description Part No. T460 INVERTER TRANS ETJV25ZB12AC LTZ00CPMS004 T470 INVERTER TRANS ETJV25ZB12AC LTZ00CPMS004 T490 INVERTER TRANS ETJV25ZB12AC LTZ00CPMS004 20040907 12-12 L0311EL...
  • Page 57 6620LE L0311UM 2004-09-29...

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