FUNAI LCD-B1504 Service Manual
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FUNAI LCD-B1504 Service Manual

FUNAI LCD-B1504 Service Manual

15"/20" color lcd television
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SERVICE MANUAL

15" COLOR LCD TELEVISION
20" COLOR LCD TELEVISION
LCD-B1504
LCD-B2004

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Summary of Contents for FUNAI LCD-B1504

  • Page 1: Service Manual

    SERVICE MANUAL 15″ COLOR LCD TELEVISION LCD-B1504 20″ COLOR LCD TELEVISION LCD-B2004...

  • Page 2: Table Of Contents

    15″/20″ COLOR LCD TELEVISION LCD-B1504 LCD-B2004 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----------- 400Hz 30% modulation Description Condition Unit Nominal Limit 1. Intermediate Freq. Picture 45.75 Sound 41.25 2. Color Killer Sens. CH-3 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 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 M. When installing parts or assembling the cabinet safety. parts, be sure to use the proper screws and Replace only with part number specified. tighten certainly. B. In addition to safety, other parts and assemblies are specified for conformance with regulations applying to spurious radiation.
  • 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 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 [LCD-B1504] 2. Disassembly Method REMOVAL 1. Disassembly Flowchart REMOVE/ This flowchart indicates the disassembly steps for the *UNHOOK/ LOC. PART Fig. cabinet parts and the CBA in order to gain access to UNLOCK/ Note item(s) to be serviced. When reassembling, follow the RELEASE/UNPLUG/ steps in reverse order.
  • Page 12 [1] Rear Cabinet (S-1) (S-1) (S-2) (S-1) (S-2) (S-1) Fig. D1 [9] Front Cabinet [8] Speaker (S-10) (S-8) [2] Jack Holder (S-8) [3] Jack Shield (S-3) (S-10) [5] Main CBA (S-4) (S-8) (S-10) (S-3) (S-9) [7] Function CBA (S-5) (S-10) [8] Speaker (S-6) (S-6)
  • Page 13 Wiring Diagram To LCD Module Assembly CN320A CN321A LCD Main CBA CN101B CN102B CN103B T402 CN101A CN102A CN103A To LCD Module Assembly T401 Main CBA CN31A CN802 CN801 To Speaker To Speaker CN31B Function CBA Fig. D3 L4101DC...
  • Page 14 [LCD-B2004] 2. Disassembly Method REMOVAL 1. Disassembly Flowchart REMOVE/ This flowchart indicates the disassembly steps for the LOC. PART *UNHOOK/UNLOCK/ Fig. cabinet parts and the CBA in order to gain access to Note RELEASE/UNPLUG/ item(s) to be serviced. When reassembling, follow the DESOLDER steps in reverse order.
  • Page 15 (S-1) (S-1) (S-1) (S-1) (S-2) (S-1) (S-2) (S-1) (S-1) (S-1) [1] Rear Cabinet Fig. D1 [11] Front Cabinet [8] Function CBA (S-9) (S-9) [10] Speaker (S-10) [2] Jack Holder (S-8) [3] Jack Shield (S-11) (S-3) [5] Main CBA (S-8) (S-4) (S-6) (S-11) (S-3)
  • Page 16 Cable Wiring Diagram To LCD Module Assembly CN311A CN313A CN310A LCD Main CBA CN101B CN102B CN103B Main CBA Inverter CBA CN51 T1402 To LCD CN101A CN102A CN103A Module Assembly T1401 CN405 CN1401 T1404 To LCD Module Assembly T1403 CN53 CN802 CN801 To Speaker To Speaker...

  • Page 17: How To Initialize The Lcd Television

    HOW TO INITIALIZE THE LCD TELEVISION To put the program back at the factory-default, initialize the LCD television as the following procedure. How to initialize the LCD television: 1. Turn the power on. (Use main power on the TV unit.) 2.

  • Page 18: 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 19 +13.0±0.3V DC [LCD-B1504] DC Voltmeter +21.0±0.3V DC [LCD-B2004] Note: TP401(+B), TP300(GND), VR649 --- Main CBA 1. Connect DC Volt Meter to TP401 and TP300(GND). 2. Adjust VR649 so that the voltage of TP401 becomes +13.0±0.3V DC [LCD-B1504] or +21.0±0.3V DC [LCD-B2004]. L4101EA...

  • Page 20: White Balance Adjustment

    The following adjustment normally are not attempted in the field. Only when replacing the LCD Panel then adjust as a preparation. 4. White Balance Adjustment Purpose: To mix red, green and blue beams correctly for pure white. Symptom of Misadjustment: White becomes bluish or reddish.

  • Page 21: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram L4101BLS...
  • Page 22 IF/Video Block Diagram L4101BLIF...
  • Page 23 Audio Block Diagram L4101BLA...
  • Page 24 LCD Block Diagram ( A ) L4101BLLCD...
  • Page 25 LCD Block Diagram ( B ) L4201BLLCD...
  • Page 26 Power Supply Block Diagram L4101BLP...
  • Page 27 LCD Backlight Block Diagram ( A ) L4101BLLB...
  • Page 28 LCD Backlight Block Diagram ( B ) L4201BLLB...

  • Page 29: 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 30 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 31 Main 1/4 & IR Sensor Schematic Diagram Comparison Chart of Models and Marks MODEL MARK LCD-B1504 LCD-B2004 L4101SCM1...
  • Page 32 Main 2/4 Schematic Diagram L4101SCM2...
  • Page 33 Main 3/4 Schematic Diagram Comparison Chart of Models and Marks MODEL MARK LCD-B1504 LCD-B2004 L4101SCM3...
  • Page 34 Main 4/4 Schematic Diagram Comparison Chart of Models and Marks MODEL MARK LCD-B1504 CAUTION ! NOTE: CAUTION ! LCD-B2004 The voltage for parts in hot circuit is measured using For continued protection against fire hazard, Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
  • Page 35 Function Schematic Diagram ( A ) Comparison Chart of Models and Marks MODEL MARK LCD-B1504 LCD-B2004 L4101SCF...
  • Page 36 Function Schematic Diagram ( B ) Comparison Chart of Models and Marks MODEL MARK LCD-B1504 LCD-B2004 L4201SCF...
  • Page 37 Inverter Schematic Diagram ( B ) Comparison Chart of Models and Marks MODEL MARK LCD-B1504 LCD-B2004 L4201SCINV...
  • Page 38 LCD Main 1/2 Schematic Diagram Comparison Chart of Models and Marks MODEL MARK LCD-B1504 LCD-B2004 8-10 L4101SCL1...
  • Page 39 LCD Main 2/2 Schematic Diagram Comparison Chart of 1 NOTE : Models and Marks CN104, CN105, CN301 are used for adjustment at factory. MODEL MARK LCD-B1504 LCD-B2004 8-11 L4101SCL2...
  • Page 40 Main CBA Top 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. For continued protection against fire hazard, supply circut, an isolation transformer must be used. 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 41 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. For continued protection against fire hazard, supply circut, an isolation transformer must be used. 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 42 Function CBA Bottom View ( A ) BL4100F01012-2 Comparison Chart of Models and Marks MODEL MARK LCD-B1504 Function CBA Top View ( B ) LCD-B2004 IR Sensor CBA Top & Bottom View ( B ) Function CBA Bottom View ( B ) BL4100F01012-3...
  • Page 43 Inverter CBA Top View ( B ) Comparison Chart of Models and Marks MODEL MARK LCD-B1504 LCD-B2004 Inverter CBA Bottom View ( B ) BL4200F01011 8-15...

  • Page 44: 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 Q754 EMITTER Q751 EMITTER AUDIO AUDIO 0.1V 0.1V 0.5ms 0.5ms CVBS2 CVBS2 0.2V...
  • Page 45 WF9 ~ WF14 = Waveforms to be observed at Models and Marks Waveform check points. MODEL MARK (Shown in Schematic Diagram.) LCD-B1504 LCD-B2004 Input: PAL Color Bar Signal (with 1kHz Audio Signal) R904 R997 ( A ) WF12 R994 ( B ) 10µs...

  • Page 46: Wiring Diagram

    WIRING DIAGRAMS ( A ) 10-1 L4101WI...
  • Page 47 WIRING DIAGRAMS ( B ) 10-2 L4201WI...
  • Page 48 EXPLODED VIEWS Cabinet [LCD-B1504] CLN802 SP802 Main CBA LCD1 CLN801 Function CBA SP801 See Electrical Parts List for parts with this mark. LCD Main CBA AC601 11-1 L4101CEX...
  • Page 49 [LCD-B2004] Function CBA CLN802 LCD1 SP802 Main CBA CLN801 SP801 CN313A CN311A IR Sensor CBA LCD Main CBA Inverter CBA See Electrical Parts List CN310A for parts with this mark. AC601 11-2 L4201CEX...
  • Page 50 Packing [LCD-B1504] Some Ref. Numbers are not in sequence. Tape Tape Packing Tape Packing Tape Packing Tape 11-3 L4101PEX...
  • Page 51 [LCD-B2004] Some Ref. Numbers are not in sequence. Packing Tape Packing Tape Tape Tape Packing Tape Packing Tape Packing Tape 11-4 L4201PEX...

  • Page 52: Mechanical Parts List

    SENSOR/LED LENS L0301UB 1EM220004 NOTE: Parts that are not assigned part numbers RATING LABEL L4201BB ---------- (---------) are not available. FUNCTION KNOB L4200EA 1EM320157 [ LCD-B1504 ] REAR COVER L4200EA 1EM320158 TILT STAND ASSEMBLY L0301UB 1EMN20039 Ref. No. Description Part No.

  • Page 53: Electrical Parts List

    C485 CERAMIC CAP . SL D 10pF/ 3KV CCD3FDASL100 Model Mark C486 CERAMIC CAP . SL D 10pF/ 3KV CCD3FDASL100 LCD-B1504 C487 ELECTROLYTIC CAP . 100µF/ 16V M or CE1CMASDL101 LCD-B2004 ELECTROLYTIC CAP . 100µF/ 16V M CE1CMASTL101 C488 ELECTROLYTIC CAP . 100µF/ 16V M or...
  • Page 54 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. METALLIZED FILM CAP . 0.1µF/ 275V K or CT2E104HJE06 C651 CHIP CERAMIC CAP .(1608) B K 0.01µF/ CHD1JK30B103 LINE ACROSS CAP . 0.1U/250V CT2E104DC015 C652 CHIP CERAMIC CAP .(1608) B K 0.01µF/ CHD1JK30B103 C602! METALLIZED FILM CAP .
  • Page 55 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. C785 ELECTROLYTIC CAP . 47µF/ 16V M H7 CE1CMAVSL470 C872 CERAMIC CAP .(AX) B K 0.1µF/ 50V CA1J104TU011 C787 ELECTROLYTIC CAP . 47µF/ 16V M H7 CE1CMAVSL470 C873 CHIP CERAMIC CAP .
  • Page 56 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. D461 ZENER DIODE MTZJT-779.1B or QDTB0MTZJ9R1 D517 ZENER DIODE MTZJT-776.2B or QDTB0MTZJ6R2 ZENER DIODE DZ-9.1BSBT265 NDTB0DZ9R1BS ZENER DIODE DZ-6.2BSBT265 NDTB0DZ6R2BS D462 ZENER DIODE MTZJT-776.2B or QDTB0MTZJ6R2 D517 ZENER DIODE MTZJT-775.6B or QDTB0MTZJ5R6 ZENER DIODE DZ-6.2BSBT265 NDTB0DZ6R2BS...
  • Page 57 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. D645! DIODE FR154 or NDLZ000FR154 IC602! POWER SUPPLY IC MODULE MR2920- QSZBA0SSD004 7109F12 FAST RECOVERY DIODE ERB44-02 QDPZ0ERB4402 IC603! PHOTOCOUPLER PS2561L1-1-VL QPEL2561L11V D646! DIODE 1ZC43 or QDQZ0001ZC43 IC631! A VOLTAGE REGULATOR KIA7805API or NSBBA0SJY011 ZENER DIODE RD43F...
  • Page 58 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. Q425! MOS FET 2SK2231 QF1Z2SK2231Q TRANSISTOR 2SA1318(T)-AANP or 2SA1318TZ Q426! MOS FET 2SK2231 QF1Z2SK2231Q TRANSISTOR 2SA1318(U)-AANP 2SA1318UZ Q427 TRANSISTOR 2SC2785(F) or QQSF02SC2785 Q505 TRANSISTOR 2SC2785(F) or QQSF02SC2785 TRANSISTOR 2SC2785(H) or QQSH02SC2785 TRANSISTOR 2SC2785(H) or QQSH02SC2785...
  • Page 59 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W J 100 Ω Q741 TRANSISTOR 2SC2785(F) or QQSF02SC2785 RRXAJR5Z0101 CHIP RES.(1608) 1/10W J 4.7k Ω TRANSISTOR 2SC2785(H) or QQSH02SC2785 RRXAJR5Z0472 CHIP RES.(1608) 1/10W J 4.7k Ω TRANSISTOR 2SC2785(J) or QQSJ02SC2785 RRXAJR5Z0472...
  • Page 60 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CARBON RES. 1/4W J 100 Ω CARBON RES. 1/4W J 120k Ω R502 RCX4JATZ0101 R614 RCX4JATZ0124 CARBON RES. 1/4W J 39k Ω R503 PCB JUMPER D0.6-P5.0 JW5.0T R614 RCX4JATZ0393 CARBON RES.
  • Page 61 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W J 12k Ω CHIP RES.(1608) 1/10W J 10k Ω R675 RRXAJR5Z0123 R776 RRXAJR5Z0103 CHIP RES.(1608) 1/10W J 75 Ω CHIP RES.(1608) 1/10W J 18k Ω R701 RRXAJR5Z0750 R777...
  • Page 62 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. MISCELLANEOUS CAPACITORS AC601! A AC CORD PE8B2V91H0A-05B WAB0182LW011 ELECTROLYTIC CAP . 47µF/ 10V M or CE1AMASDL470 AC601! B AC CORD PE8G2XA1H0AA061 WAB0182LW015 ELECTROLYTIC CAP . 47µF/ 10V M CE1AMASTL470 HEAT SINK PKB ASSEMBLY L4100EA 1EM420583...
  • Page 63 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. SW53 TACT SWITCH SKHHARA010 or SST0101AL060 C1417 ELECTROLYTIC CAP . 470µF/ 35V M(VR) CE1GMZNTL471 TACT SWITCH KSMC622A SST0101HH031 ELECTROLYTIC CAP . 470µF/ 35V M or CE1GMZADL471 SW54 TACT SWITCH SKHHARA010 or SST0101AL060 ELECTROLYTIC CAP .
  • Page 64 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. C1495 CHIP CERAMIC CAP .(1608) B K 0.22µF/ CHD1EK30B224 D1437 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 SWITCHING DIODE 1N4148 NDTZ001N4148 C1496 CHIP CERAMIC CAP .(1608) B K 0.22µF/ CHD1EK30B224 D1440 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133...
  • Page 65 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W J 5.1k Ω Q1407! B FET TPC8405(TE12 L Q) QF2ZTPC8405Q R1405 RRXAJR5Z0512 CHIP RES.(1608) 1/10W J 10k Ω Q1408! B FET TPC8405(TE12 L Q) QF2ZTPC8405Q R1406 RRXAJR5Z0103 CHIP RES.(1608) 1/10W J 10k Ω...
  • Page 66 Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W J 680k Ω R1483 RRXAJR5Z0684 CARBON RES. 1/4W J 10k Ω R1484 RCX4JATZ0103 CHIP RES.(1608) 1/10W J 680k Ω R1485 RRXAJR5Z0684 CHIP RES.(1608) 1/10W J 10k Ω R1486 RRXAJR5Z0103 CARBON RES. 1/4W J 10k Ω R1487 RCX4JATZ0103 CHIP RES.(1608) 1/10W J 10k Ω...
  • Page 67 LCD-B1504/LCD-B2004 L4101BB/L4201BB 2005-2-24...

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