Sylvania LC225SL9 Service Manual
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Sylvania LC225SL9 Service Manual

22″ color lcd television
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SERVICE MANUAL
22" COLOR LCD TELEVISION
LC225SL9

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Summary of Contents for Sylvania LC225SL9

  • Page 1 SERVICE MANUAL 22″ COLOR LCD TELEVISION LC225SL9...

  • 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 / NTSC > ANT. Input ---------------------- 75 Ω Unbal., F type Description Condition Unit Nominal Limit 1. AFT Pull-In Range ±2.3 ±2.1 TV.ch.4 dBµ 2. Syncronizing Sens. CA.ch.31 dBµ CA.ch.87 dBµ < TUNER / ATSC > Description Condition Unit Nominal...
  • Page 4 < AUDIO > All items are measured across 8 Ω load at speaker output terminal with L.P.F. / Video1 Input. Description Condition Unit Nominal Limit VOL MAX: 1. Audio Output Power 2.0/2.0 1.8/1.8 Lch/Rch 2. Audio Distortion 500mW: Lch/Rch 0.5/0.5 2.0/2.0 -6dB: Lch 70 to 10 k...

  • 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 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 7 Precautions during Servicing A. Parts identified by the # symbol are critical for safety. Replace only with part number specified. B. In addition to safety, other parts and assemblies are specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements.
  • Page 8 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 9: 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 10 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 11 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 12 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 13: 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 14 [3] Rear Cabinet (S-3) (S-3) (S-3) (S-4) (S-1) (S-3) (S-3) (S-4) (S-2) [2] Stand Neck [1] Stand Cover Fig. D1 A8A70DC...
  • Page 15 [15] Front Cabinet [12] Function [14] Speaker [13] LCD Module Assembly Speaker Holder Speaker Holder (S-14) [6] Shield(T) (S-14) [14] Speaker [5] Digital Main [8] Junction CBA Unit (S-12) [11] IR Sensor (S-8) (S-9) (S-13) (S-7) [9] Inverter CBA (S-10) (S-7) (S-9) (S-6)
  • Page 16 TV Cable Wiring Diagram To LCD Module Assembly Inverter CBA CN401 To LCD Module Assembly Junction CL404 Digital Main CBA Unit CN404B CN4501 CN4502 CN402 CN404A CN3601 CN3701 CN3704 CN403 CN451 To Speaker Power Supply CBA CN102 CN301 CN303 CN302 CN309 Function CL102...

  • 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 1. Purity Check Mode 2. VCOM Adjustment. This mode cycles through full-screen displays of red, Test Point Adj. Point green, blue, and white to check for non-active pixels. [CH o/p] Screen 1. Enter the Service mode. buttons 2. Each time pressing [7] button on the service M.
  • Page 19 The following adjustment normally are not attempted in 5. [CUTOFF] the field. Only when replacing the LCD Panel then adjust Press [3] button to select “COB” for Blue Cutoff as a preparation. adjustment. Press [1] button to select “COR” for Red Cutoff adjustment.

  • Page 20: How To Initialize The Lcd Television

    HOW TO INITIALIZE THE LCD TELEVISION How to initialize the LCD television: 1. Turn the power on. 2. To enter the service mode, press the service button on the service remote control unit. (Refer to page 5-1.) - To cancel the service mode, press [POWER] button on the remote control unit.

  • Page 21: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram A8A70BLS...
  • Page 22 Video Block Diagram A8A70BLV...
  • Page 23 Audio-1 Block Diagram A8A70BLA1...
  • Page 24 Audio-2 Block Diagram A8A70BLA2...
  • Page 25 Digital Signal Process Block Diagram A8A70BLD...
  • Page 26 Inverter Block Diagram A8A70BLINV...
  • Page 27 Power Supply Block Diagram A8A70BLP...

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

    SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS Standard Notes WARNING 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.
  • Page 29 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 30 Power Supply 1/3 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, The voltage for parts in hot circuit is measured using If Main Fuse (F601) is blown , check to see that all components in the power supply replace only with same type 4 A, 125V fuse.
  • Page 31 Power Supply 2/3 Schematic Diagram VOLTAGE CHART CN303 Pin No. Voltage A8A70SCP2...
  • Page 32 Power Supply 3/3 Schematic Diagram VOLTAGE CHART CN302 Pin No. Voltage A8A70SCP3...
  • Page 33 Inverter & Junction Schematic Diagram A8A70SCINV...
  • Page 34 Function Schematic Diagram A8A70SCF...
  • Page 35 IR Sensor Schematic Diagram A8A70SCIR...
  • Page 36 Digital Main 1/4 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into four and shown as IC3301 (1/4) ~ IC3301 (4/4) in this Digital Main Schematic Diagram Section. A8A70SCD1...
  • Page 37 Digital Main 2/4 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into four and shown as IC3301 (1/4) ~ IC3301 (4/4) in this Digital Main Schematic Diagram Section. 8-10 A8A70SCD2...
  • Page 38 Digital Main 3/4 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into four and shown as IC3301 (1/4) ~ IC3301 (4/4) in this Digital Main Schematic Diagram Section. 8-11 A8A70SCD3...
  • Page 39 Digital Main 4/4 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into four and shown as IC3301 (1/4) ~ IC3301 (4/4) in this Digital Main Schematic Diagram Section. A8A70SCD4 8-12...
  • Page 40 Power Supply CBA Top View Because a hot chassis ground is present in the power CAUTION ! supply circuit, an isolation transformer must be used. Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. Also, in order to have the ability to increase the input CAUTION ! : For continued protection against risk of fire, If Main Fuse (F601) is blown , check to see that all components in the power supply...
  • Page 41 Power Supply CBA Bottom View NOTE: CAUTION ! The voltage for parts in hot circuit is measured using Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. CAUTION ! : For continued protection against risk of fire, hot GND as a common terminal.
  • Page 42 Inverter CBA Top View BA8A70F01021-1 8-15...
  • Page 43 Inverter CBA Bottom View BA8A70F01021-1 8-16...
  • Page 44 Function CBA Top View IR Sensor CBA Top View Function CBA Bottom View IR Sensor CBA Bottom View BA8AN0F01012-2 BA8AN0F01012-3 8-17...
  • Page 45 Junction CBA Junction CBA Top View Bottom View BA8A70F01021 8-18...

  • Page 46: 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 23 of CN302 Pin 16 of CN302 VIDEO 0.2V 20µs COMP-Pb 0.2V 20µs Pin 19 of CN302 Pin 17 of CN302 20µs...

  • Page 47: Wiring Diagram

    WIRING DIAGRAM 10-1 A8A70WI...

  • Page 48: Exploded Views

    EXPLODED VIEWS Cabinet Digital Main CBA Unit CL4502 CL4501 SP801 SP802 Function CBA LCD1 IR Sensor CBA Inverter CBA Junction CBA Power Supply CBA See Electrical Parts List for parts with this mark. AC601 11-1 A8A70CEX...
  • Page 49 Packing Some Ref. Numbers are not in sequence. Packing Tape Tape Packing Tape Packing Tape Packing Tape 11-2 A8A70PEX...

  • Page 50: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. REMOTE CONTROL NF015UD 170/ NF015UD ECNLC501/NF015UD Before replacing any of these components, read DRY BATTERY(SUNRISE) R6SSE/2S XB0M451MS002 carefully the product safety notice in this service FCC ADDENDUM SHEET E9H10UD 1VMN25693 manual.

  • Page 51: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. C605 POLYESTER FILM CAP . (PB FREE) 0.001µF/ CA2A102DT018 100V J Before replacing any of these components, read C607# CAP CERAMIC 4700pF/250V/M/KX CA2E472MR101...
  • Page 52 Ref. No. Description Part No. Ref. No. Description Part No. C7710 CHIP CERAMIC CAP . F Z 0.47µF/16V CHD1CZ30F474 D644# DIODE 1ZC43(Q) QDLZ001ZC43Q C7714 CHIP CERAMIC CAP .(1608) CH J 100pF/50V CHD1JJ3CH101 D645 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 C7715 CHIP CERAMIC CAP .(1608) B K 0.047µF/50V CHD1JK30B473 D646 SWITCHING DIODE 1SS133(T-77)
  • Page 53 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 1k Ω Q647 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P R622 RCX4JATZ0102 METAL OXIDE FILM RES. 1W J 8.2 Ω Q650 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P R627 RN018R2DP003 METAL OXIDE FILM RES. 1W J 8.2 Ω Q671 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P...
  • Page 54 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 10k Ω CHIP RES. 1/10W J 15k Ω R7206 RRXAJR5Z0103 R7806 RRXAJR5Z0153 CHIP RES. 1/10W J 56 Ω CHIP RES. 1/10W J 2.2k Ω R7207 RRXAJR5Z0560 R7807 RRXAJR5Z0222 CHIP RES.
  • Page 55 Ref. No. Description Part No. Ref. No. Description Part No. SW110 TACT SWITCH SKQSAB SST0101AL038 C424 CHIP CERAMIC CAP .(1608) B K 0.01µF/50V CHD1JK30B103 SW111 TACT SWITCH SKQSAB SST0101AL038 C425 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 SW112 TACT SWITCH SKQSAB SST0101AL038 C426 ELECTROLYTIC CAP .
  • Page 56 Ref. No. Description Part No. Ref. No. Description Part No. D407 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q422 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P D408 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q423 TRANSISTOR 2SA950-Y(TE2 F T) QQSY02SA950F D409 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q424 FET MOS SMD HAT2215R01-EL-E QF2ZHAT2215R D411 SWITCHING DIODE 1SS133(T-77)
  • Page 57 Ref. No. Description Part No. CARBON RES. 1/4W J 5.1k Ω R470 RCX4JATZ0512 CARBON RES. 1/4W J 10k Ω R471 RCX4JATZ0103 CHIP RES. 1/10W J 240k Ω R472 RRXAJR5Z0244 CHIP RES. 1/10W F 56k Ω R473 RRXAFR5H0563 CHIP RES. 1/10W J 24k Ω R474 RRXAJR5Z0243 CHIP RES.
  • Page 58 Misuse of any trademarks or any other content in this manual is strictly prohibited. Funai shall aggressively enforce its intellectual property rights to the fullest extent of the law. LC225SL9 A8A70UH 2008-05-22...

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