FUNAI LC5-D20BB Service Manual
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FUNAI LC5-D20BB Service Manual

Funai lc5-d20bb color lcd television
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SERVICE MANUAL

20" COLOR LCD TELEVISION
LC5-D20BB

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Summary of Contents for FUNAI LC5-D20BB

  • Page 1: Service Manual

    SERVICE MANUAL 20" COLOR LCD TELEVISION LC5-D20BB...

  • Page 2: Table Of Contents

    20″ COLOR LCD TELEVISION LC5-D20BB TABLE OF CONTENTS Specifications ................1-1 Important Safety Precautions.

  • Page 3: Specifications

    SPECIFICATIONS <TUNER> ANT. Input ------------------- 80 dBµV, Video: PAL 87.5%, Audio: 30 kHz dev (1 kHz Sin) Test Input Signal----------- 400 Hz 30% modulation Description Condition Unit Nominal Limit 1. Intermediate Freq. Picture PAL-BG/I/DK, SECAM-L 38.9 SECAM-L’ 33.9 Sound PAL-BG 33.4 PAL-I 32.9...

  • 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 4. Hot Chassis Warning - 7. Product Safety Notice - Some electrical and mechanical parts have special safety-related a. Some TV receiver chassis are electrically characteristics which are often not evident from connected directly to one conductor of the AC visual inspection, nor can the protection they give power cord and maybe safety-serviced without necessarily be obtained by replacing them with...
  • Page 6 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 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 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 1. The output pin of the 3 pin Regulator ICs is 1. Removal indicated as shown. With Hot-Air Flat Pack-IC Desoldering Machine: 1. Prepare the hot-air flat pack-IC desoldering Top View Bottom View machine, then apply hot air to the Flat Pack-IC...
  • Page 9 With Soldering Iron: 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 all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, flux which is applied to all pins of the flat pack-IC, you can remove it easily.
  • Page 10 2. Installation Instructions for Handling Semi- 1. Using desoldering braid, remove the solder from conductors the foil of each pin of the flat pack-IC on the CBA Electrostatic breakdown of the semi-conductors may so you can install a replacement flat pack-IC more occur due to a potential difference caused by easily.

  • Page 11: Cabinet Disassembly Instructions

    CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart Removal Step/ This flowchart indicates the disassembly steps for the Remove/*Unhook/ 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 12 [3] Rear Cabinet (S-3) (S-3) (S-4) (S-1) (S-3) [2] Stand Cover [1] Arm Assembly (S-2) Fig. D1 A7340DC...
  • Page 13 [13] Front Cabinet [4] Function CBA (S-5) [12] Speaker (S-10) (S-11) Speaker Holders (S-10) [7] Jack Holder (S-7) Earth Plate Speaker (S-10) [6] IR Sensor Holders (S-10) (S-9) (S-8) [12] Speaker (S-11) [9] LCD Main CBA Unit & (S-6) Liquid Crystal Panel Unit (S-9) (S-10) (S-9)
  • Page 14 TV Cable Wiring Diagram Function CBA CN51A To Liquid Crystal Panel Unit LCD Main Main CBA CBA Unit CN51B CN1001 CN1000 CN401 CN101B CN102B CN103B CN101A CN102A CN103A To Liquid Crystal Panel Unit Junction-A CN403 CL801 CN801 CN802 CN53 Speaker CL802 Junction-B CLN53...

  • Page 15: 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 [STANDBY-ON], [2], [7], [1], and [ ] buttons on the remote control unit in that order within 5 seconds. - To cancel the service mode, press [STANDBY- ON] button on the remote control.

  • Page 16: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: 1. Initial Setting “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 table 1 below. circuit components and certain mechanical parts. It is Table 1: Initial Data important to perform these adjustments only after all repairs and replacements have been completed.

  • Page 17: Flicker Adjustment

    2. Flicker Adjustment BUTTON DATA ITEM (on the remote 1. Enter the Service mode. VALUE control) 2. Press [2] button on the remote control unit. BRT(NTSC) The following screen appears. CNT(NTSC) CLR-R(NTSC) [SETUP(NTSC)] → [2] CLR-B(NTSC) VCOM TNT(NTSC) SHR(NTSC) S-BRT(NTSC) S-CNT(NTSC) S-CLR-R(NTSC) [SETUP(NTSC)]...

  • Page 18: White Balance Adjustment

    The following adjustment normally are not 6. [AV1(RGB)]----(APL 80%) Press [6] button to select “C-DB(C/D/S-2)” for Blue attempted in the field. Only when replacing the adjustment. Press [4] button to select “C-DR(C/D/ LCD Panel then adjust as a preparation. S-2)” for Red adjustment.When “x” value and “y” value are not within specification, adjust “C-DB(C/ 3.

  • Page 19: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram A7340BLS...
  • Page 20 IF/Video Block Diagram A7340BLIF...
  • Page 21 Audio Block Diagram A7340BLA...
  • Page 22 LCD Block Diagram A7340BLLCD...
  • Page 23 Power Supply Block Diagram A7340BLP...
  • Page 24 LCD Backlight Block Diagram A7340BLLB...

  • Page 25: 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 26 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE. 2. CAUTION: Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown, first check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply.
  • Page 27 Main 1/4 & IR Sensor Schematic Diagram VOLTAGE CHART CN101A Pin No. Voltage 24.2 10.7 CN102A Pin No. Voltage A7340SCM1...
  • Page 28 Main 2/4, Junction-A & Junction-B Schematic Diagram VOLTAGE CHART CN103A Pin No. Voltage A7340SCM2...
  • Page 29 Main 3/4 Schematic Diagram A7340SCM3...
  • Page 30 Main 4/4 Schematic Diagram CAUTION ! CAUTION ! NOTE: Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. For continued protection against fire hazard, 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 the same type fuse.
  • Page 31 Function Schematic Diagram A7340SCF...
  • Page 32 LCD Main 1/2 Schematic Diagram A7340SCL1...
  • Page 33 LCD Main 2/2 Schematic Diagram A7340SCL2...
  • Page 34 Main CBA Top View CAUTION ! CAUTION ! Because a hot chassis ground is present in the power supply circut, an isolation transformer must be used. For continued protection against fire hazard, 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 Also, in order to have the ability to increase the input replace only with the same type fuse.
  • Page 35 Main CBA Bottom View CAUTION ! 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 circut, an isolation transformer must be used. For continued protection against fire hazard, replace only with the same type fuse.
  • Page 36 Function CBA Top View IR Sensor CBA Top & Bottom View BA7340F01011-3 Function CBA Bottom View Junction-A CBA Top & Bottom View BA7340F01011-4 Junction-B CBA Top & Bottom View BA7340F01011-2 BA7340F01011-5 8-12...

  • Page 37: Waveforms

    WAVEFORMS WF1 ~ WF8 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 14 of IC801 Pin 22 of CN102A Pin 21 of CN102A AUDIO 0.1V 0.5ms VIDEO1 0.2V...

  • Page 38: Wiring Diagram

    WIRING DIAGRAMS A7340WI 10-1...

  • Page 39: Exploded View

    EXPLODED VIEWS Cabinet Function CBA SP802 IR Sensor CBA SP801 Junction-B CBA LCD Main CBA Unit & Liquid Crystal Panel Unit See Electrical Parts List for parts with this mark. Main CBA Junction-A CBA AC601 11-1 A7340CEX...
  • Page 40 Packing Some Ref. Numbers are not in sequence. X2-1, X2-2, X2-3, X2-4, X2-5, X2-6, X2-7, X2-8, X2-9, Packing Tape Tape X2-10, X2-11, X2-12, X2-13, X2-14, X2-15, X2-16, X2-17 Packing Tape Packing Tape Packing Tape 11-2 A7340PEX...

  • 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. X2-10! OWNERS MANUAL(HU) A7340EP 1EMN22252 Before replacing any of these components, read X2-11! OWNERS MANUAL(CS) A7340EP 1EMN22253 carefully the product safety notice in this service X2-12! OWNERS MANUAL(EL) A7340EP 1EMN22254...

  • Page 42: 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 22µF/50V M CE1JMASTM220 Before replacing any of these components, read C405 ELECTROLYTIC CAP . 1µF/50V M or CE1JMASDL1R0 carefully the product safety notice in this service ELECTROLYTIC CAP 1µF/50V M or...
  • Page 43 Ref. No. Description Part No. Ref. No. Description Part No. CAP POLYESTER FILM 0.01µF/50V J CA1J103SER04 ELECTROLYTIC CAP . 220µF/16V M or CA1C221SP085 C624 FILM CAP .(P) 0.022µF/50V J or CMA1JJS00223 ELECTROLYTIC CAP . 220µF/16V M CE1CMASTM221 FILM CAP .(P) 0.022µF/50V J or CA1J223MS029 C805 ELECTROLYTIC CAP .
  • Page 44 Ref. No. Description Part No. Ref. No. Description Part No. ELECTROLYTIC CAP . 0.47µF/50V M or CA1JR47SP085 CONNECTOR PRINT OSU C S 440054-5 J344C05AP001 ELECTROLYTIC CAP . 0.47µF/50V M CE1JMASTMR47 CN101A TWG CONNECTOR 23P TWG-P23P-A1 J3TWA23TG001 C902 ELECTROLYTIC CAP . 2200µF/25V M or CE1EMZPDL222 CN102A TWG CONNECTOR 23P TWG-P23P-A1...
  • Page 45 Ref. No. Description Part No. Ref. No. Description Part No. D464 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D901 DIODE FR154 or NDLZ000FR154 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 DIODE FR154BD or NDL1000FR154 D465 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 FAST RECOVERY DIODE ERB44-02 QDPZ0ERB4402 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 D902!
  • Page 46 Ref. No. Description Part No. Ref. No. Description Part No. D942 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTORS DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 TRANSISTOR KTA1267-GR-AT/P or NQS1KTA1267P D943 SHUNT REGULATOR KIA2431AP-AT/P or NSZBA0TJY054 TRANSISTOR KTA-1266-GR-AT/P or NQS4KTA1266P IC SHUNT REGULATOR SL432A-AT TO-92 NSZBA0TAUK02 TRANSISTOR 2SA1015-Y(TE2 F T) or QQSY2SA1015F...
  • Page 47 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 680 Ω Q906 TRANSISTOR 2SC2120-O(TE2 F T) or QQS02SC2120F R414 RCX4JATZ0681 CARBON RES. 1/4W J 150 Ω TRANSISTOR 2SC2120-Y(TE2 F T) QQSY2SC2120F R415 RCX4JATZ0151 CARBON RES. 1/4W J 150 Ω Q907 TRANSISTOR KTA1267-GR-AT/P or NQS1KTA1267P...
  • Page 48 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 10k Ω RES CHIP 1608 1/10W J 100k Ω RRXA103YF002 RRXA104YF002 CHIP RES. 1/10W J 10k Ω or CARBON RES. 1/4W J 4.7k Ω R473 RRXAJR5Z0103 R727 RCX4JATZ0472...
  • Page 49 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 75 Ω CHIP RES. 1/10W J 100k Ω or RRXA750YF002 R842 RRXAJR5Z0104 CARBON RES. 1/4W J 100 Ω RES CHIP 1608 1/10W J 100k Ω R771 RCX4JATZ0101 RRXA104YF002...
  • Page 50 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W F 6.80k Ω CARBON RES. 1/4W J 2.2k Ω RTW6801YF002 R944 RCX4JATZ0222 CHIP RES. 1/10W F 5.1k Ω or CHIP RES. 1/10W J 10k Ω or R908! RRXAFR5H5101 R945...
  • Page 51 Ref. No. Description Part No. Ref. No. Description Part No. F601! FUSE 4A/250V(PB FREE) 0215004.MXP PBGZ20BAG021 TACT SWITCH KSMC622A SST0101HH031 FH601 FUSE HOLDER MSF-015 LF (B110) XH01Z00LY002 SW31 TACT SWITCH SKHHARA010 or SST0101AL060 FH602 FUSE HOLDER MSF-015 LF (B110) XH01Z00LY002 TACT SWITCH KSMC622A SST0101HH031 J128...
  • Page 52 LC5-D20BB A7340EP 2007-10-09...

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