FUNAI LT6-M19WB Service Manual
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FUNAI LT6-M19WB Service Manual

FUNAI LT6-M19WB Service Manual

19″ color lcd television
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SERVICE MANUAL
This Service Manual is for the
Serial No. Label
LT6-M19WB(A8CNBFP) model.
For the LT6-M19WB(A8CNBFP)
model, the letter (A8CNBFP) is
"A8CNBFP"
printed on the Serial No. Label.
Refer to the Serial No. Label on the
right.
19" COLOR LCD TELEVISION
LT6-M19WB

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Summary of Contents for FUNAI LT6-M19WB

  • Page 1 SERVICE MANUAL This Service Manual is for the Serial No. Label LT6-M19WB(A8CNBFP) model. For the LT6-M19WB(A8CNBFP) model, the letter (A8CNBFP) is "A8CNBFP" printed on the Serial No. Label. Refer to the Serial No. Label on the right. 19″ COLOR LCD TELEVISION...

  • Page 2: Table Of Contents

    19″ COLOR LCD TELEVISION LT6-M19WB TABLE OF CONTENTS Specifications ................1-1 Important Safety Precautions.

  • Page 3: Specifications

    SPECIFICATIONS < TUNER > VHS/UHF Input ----------- 75Ω unbal., IEC Connector Center IF ------------------- SECAM-L 38.9MHz, SECAM-L’ 33.9MHz Description Condition Unit Nominal Limit 1. Video S/N 2. Audio S/N 40/40 < LCD PANEL > Description Condition Unit Nominal Limit Horizontal pixels 1440 1.
  • Page 4 < AUDIO > All items are measured across 8 Ω load at speaker output terminal. Description Condition Unit Nominal Limit 1. Audio Output Power 10% THD: Lch/Rch 1.0/1.0 0.8/0.8 2. Audio Distortion 500mW: Lch/Rch 1.5/1.5 3.0/3.0 -6dB: Lch 70 to 8 k 3.

  • 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 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 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 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 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: 1. Prepare the hot-air flat pack-IC desoldering Top View Bottom View machine, then apply hot air to the Flat Pack-IC...
  • Page 10 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 11 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 12: 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 13 [4] Rear Cabinet (L-1) (S-4) (S-3) (S-4) (L-1) (L-1) (S-4) (L-1) (S-4) (L-1) (S-1) (S-4) [3] Stand Hinge [2] Stand Neck (S-2) [1] Stand Cover Fig. D1 A8CNBDC...
  • Page 14 [16] Front Cabinet [7] Digital Main (S-8) (S-9) CBA Unit Connector IC Card OSU (S-8) [15] Speaker [6] Shield Box [14] LCD Module Assembly (S-7) (S-14) (S-5) [15] Speaker (H-1) (S-7) (S-6) (S-14) (S-5) [5] Jack CBA (S-7) [9] Main CBA FFC Shield [8] Shield(T) (S-11)
  • Page 15 TV Cable Wiring Diagram To LCD Module Assembly Inverter CBA Jack CBA Junction CN401 CN11 CL403 To LCD Module CN403B Assembly CN403A Digital Main CBA Unit CN4501 CN4502 CN402 CN3601 CN3701 CN4503 CN3704 CN451 Main CBA To Speaker CN106 CN104A CN101A CN102A CN103A...

  • Page 16: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS How to set up the service mode: General Note: “CBA” is abbreviation for “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 17 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. Screen 1. Enter the Service mode. buttons 2. Each time pressing [7] button on the service M.
  • Page 18 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 19: 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 [ ] button on the remote control unit.

  • Page 20: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram A8CNBBLS...
  • Page 21 Video Block Diagram A8CNBBLV...
  • Page 22 Audio-1 Block Diagram A8CNBBLA1...
  • Page 23 Audio-2 Block Diagram A8CNBBLA2...
  • Page 24 Digital Signal Process Block Diagram A8CNBBLD...
  • Page 25 Inverter Block Diagram A8CNBBLINV...
  • Page 26 Power Supply Block Diagram A8CNBBLP...

  • Page 27: Schematic Diagrams / Cba And Test Points

    SCHEMATIC DIAGRAMS / CBA 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 28 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 29 Main 1/3 Schematic Diagram A8CNBSCM1...
  • Page 30 Main 2/3, Jack Schematic Diagram A8CNBSCM2...
  • Page 31 Main 3/3 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 32 Inverter & Junction Schematic Diagram A8CNBSCINV...
  • Page 33 Function Schematic Diagram A8CNBSCF...
  • Page 34 IR Sensor Schematic Diagram A8CNBSCIR...
  • Page 35 Digital Main 1/6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC4513. IC4513 is divided into five and shown as IC4513 (1/5) ~ IC4513 (5/5) in this Digital Main Schematic Diagram Section. A8CNBSCD1...
  • Page 36 Digital Main 2/6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC4513. IC4513 is divided into five and shown as IC4513 (1/5) ~ IC4513 (5/5) in this Digital Main Schematic Diagram Section. 8-10 A8CNBSCD2...
  • Page 37 Digital Main 3/6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC4513. IC4513 is divided into five and shown as IC4513 (1/5) ~ IC4513 (5/5) in this Digital Main Schematic Diagram Section. 8-11 A8CNBSCD3...
  • Page 38 Digital Main 4/6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC4513. IC4513 is divided into five and shown as IC4513 (1/5) ~ IC4513 (5/5) in this Digital Main Schematic Diagram Section. 8-12 A8CNBSCD4...
  • Page 39 Digital Main 5/6 Schematic Diagram 8-13 A8CNBSCD5...
  • Page 40 Digital Main 6/6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC4513. IC4513 is divided into five and shown as IC4513 (1/5) ~ IC4513 (5/5) in this Digital Main Schematic Diagram Section. 8-14 A8CNBSCD6...
  • Page 41 Main CBA Top View CAUTION ! Because a hot chassis ground is present in the power CAUTION ! 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. Also, in order to have the ability to increase the input replace only with the same type fuse.
  • Page 42 Main CBA Bottom View Because a hot chassis ground is present in the power CAUTION ! CAUTION ! 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. Also, in order to have the ability to increase the input replace only with the same type fuse.
  • Page 43 Inverter CBA Top View 8-17 BA8CN0F01023-1...
  • Page 44 Inverter CBA Bottom View 8-18 BA8CN0F01023-1...
  • Page 45 Function CBA Top View IR Sensor CBA Top View Function CBA Bottom View IR Sensor CBA Bottom View BA8CN6F01013-2 BA8CN6F01013-3 8-19...
  • Page 46 Jack CBA Top View Junction CBA Top & Bottom View BA8CN0F01023 Jack CBA Bottom View BA8CN6F01013-4 8-20...

  • Page 47: Waveforms

    WAVEFORMS WF1 ~ WF7 = 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 1 of CN102A Pin 5 of CN102A VIDEO 0.2V 20µs AUDIO 0.1V...

  • Page 48: Wiring Diagram

    WIRING DIAGRAMS A8CNBWI 10-1...

  • Page 49: Exploded View

    EXPLODED VIEWS Cabinet Digital Main CBA Unit CN3802 LCD1 CL3704 CL4503 CL4502 CL3701 CL4501 CL3601 CL802 SP802 SP451 CL107 Jack CBA CL451 Main CBA Function CBA IR Sensor CBA See Electrical Parts List Inverter CBA for parts with this mark. Junction CBA AC601 11-1...
  • Page 50 Packing Some Ref. Numbers are not in sequence. X2-4 Packing Tape Packing Tape Tape Packing Tape Packing Tape 11-2 A8CNBPEX...

  • Page 51: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a ! have special characteristics important to safety. Ref. No. Description Part No. Before replacing any of these components, read RATING LABEL A8CNBFP ---------- carefully the product safety notice in this service POP LABEL A8CNAFP ---------- manual.

  • 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. C624 POLYESTER FILM CAP . (PB FREE) 0.0015µF/ CA2A152DT018 100V J or Before replacing any of these components, read CAP POLYESTER FILM 0.0015µF/100V J CA2A152SER02 carefully the product safety notice in this service...
  • Page 53 Ref. No. Description Part No. Ref. No. Description Part No. C836 CHIP CERAMIC CAP .(1608) CH J 1000pF/50V CHD1JJ3CH102 CONNECTOR PRINT MES 00 6232 007 006 JC62G07UG026 800+ C837 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V CHD1JZ30F104 CN802 CONNECTOR PRINT OSU J383C02UG004 C883 CHIP CERAMIC CAP .(1608) B K 1µF/10V...
  • Page 54 Ref. No. Description Part No. Ref. No. Description Part No. IC SHUNT REGULATOR SL431A-AT or NSZBA0TAUK01 IC802 IC(AUDIO D/A) PCM1782DBQR NSZBA0TTY192 IC SHUNT REGULATOR AS431BZTR-E1 NSZBA0TBCD01 IC850 IC SWITCHING TC4052BF(ELNF) or QSZBA0TTS162 D922 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 IC SWITCHING CD4052BNSR or NSZBA0TTY091 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148...
  • Page 55 Ref. No. Description Part No. Ref. No. Description Part No. RESISTORS NPN TRANSISTOR 2SC5343G-AT or NQSG02SC5343 CHIP RES. 1/10W J 10 Ω or NPN TRANSISTOR 2SC5343MG-AT NQSG2SC5343M R102 RRXAJR5Z0100 RES CHIP 1608 1/10W J 10 Ω Q805 TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P RRXA100YF002 CHIP RES.
  • Page 56 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 75 Ω or RES CARBON FILM T 1/4W J 470 Ω or R707 RRXAJR5Z0750 RCX4471T1001 RES CHIP 1608 1/10W J 75 Ω RES CARBON FILM 1/4W J 470 Ω RRXA750YF002 RCX4471FS002 CHIP RES.
  • Page 57 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 10k Ω or CARBON RES. 1/4W J 100k Ω or R808 RRXAJR5Z0103 R847 RCX4JATZ0104 RES CHIP 1608 1/10W J 10k Ω RES CARBON FILM T 1/4W J 100k Ω or RRXA103YF002 RCX4104T1001 CHIP RES.
  • Page 58 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W F 5.6k Ω or RES CARBON FILM 1/4W J 2.7k Ω RRXAFR5Z0562 RCX4272FS002 RES CHIP 1608 1/10W F 5.60k Ω CHIP RES. 1/10W J 10k Ω or RTW5601YF002 R945 RRXAJR5Z0103...
  • Page 59 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W F 5.6k Ω or RRXAFR5Z0562 T601! TRANS POWER 8729 or LTT2PE0KT047 RES CHIP 1608 1/10W F 5.60k Ω RTW5601YF002 TRANS POWER BCK-28-9943 LTT2PE0XB036 CHIP RES. 1/10W J 2.7k Ω or R977 RRXAJR5Z0272 TM601...
  • Page 60 Ref. No. Description Part No. Ref. No. Description Part No. TACT SWITCH TC-1104(H=5.0) or SST0101DNG02 JACK SW RCA PCB S(RED) 01 MTJ-032-04A- JYRJ010LY031 75 FE TACT SWITCH KSM0612B SST0101HH003 SW202 TACT SWITCH SKQSAB or SST0101AL038 MUT CBA TACT SWITCH TC-1104(H=5.0) or SST0101DNG02 TACT SWITCH KSM0612B SST0101HH003...
  • Page 61 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 1.5k Ω DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 RRXA152YF002 CARBON RES. 1/4W J 27k Ω or D414 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 R402 RCX4JATZ0273 RES CARBON FILM T 1/4W J 27k Ω or DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 RCX4273T1001...
  • Page 62 Ref. No. Description Part No. CHIP RES. 1/10W J 560 Ω or R438 RRXAJR5Z0561 RES CHIP 1608 1/10W J 560 Ω RRXA561YF002 METAL OXIDE FILM RES. 2W J 0.68 Ω or R439 RN02R68ZU001 METAL OXIDE FILM RES. 2W J 0.68 Ω RN02R68DP004 CHIP RES.
  • Page 63 LT6-M19WB A8CNBFP 2009-05-14...

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