FUNAI LT8-M40BB Service Manual
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FUNAI LT8-M40BB Service Manual

40? color lcd television
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SERVICE MANUAL

This Service Manual is for the LT8-M40BB (A03P3PH) model.
For the LT8-M40BB (A03P3PH) model, the letter (A03P3PH) is printed on
the Serial Number Label on the back of the unit. Refer to the Serial
Number Label below.
Serial No. Label
"A03P3PH"
40" COLOR LCD TELEVISION
LT8-M40BB

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Summary of Contents for FUNAI LT8-M40BB

  • Page 1: Service Manual

    SERVICE MANUAL This Service Manual is for the LT8-M40BB (A03P3PH) model. For the LT8-M40BB (A03P3PH) model, the letter (A03P3PH) is printed on the Serial Number Label on the back of the unit. Refer to the Serial Number Label below. Serial No. Label "A03P3PH"...

  • Page 2: Table Of Contents

    40″ COLOR LCD TELEVISION LT8-M40BB 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 1920 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 10.0/10.0 8.0/8.0 2. Audio Distortion 500mW: Lch/Rch 1.5/1.5 3.0/3.0 -6dB: Lch 70 to 10 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 Step/ Fig. Loc. Part Removal Note This flowchart indicates the disassembly steps for the cabinet parts, and the CBA in order to gain access to Speaker 6(S-10), CN801, item(s) to be serviced. When reassembling, follow the Holder CN802 steps in reverse order.
  • Page 13 Note: (1) Order of steps in procedure. When reassembling, follow the steps in reverse order. These numbers are also used as the Identification (location) No. of parts in figures. (2) Parts to be removed or installed. (3) Fig. No. showing procedure of part location (4) Identification of parts to be removed, unhooked, unlocked, released, unplugged, unclamped, or desoldered.
  • Page 14 Function Knob Knob Frame [8] Function CBA (S-10) (S-10) [6] Speaker [6] Speaker [5] Speaker Holder [7] IR Sensor (S-11) Fig. D2 [9] Jack Holder(HP) (S-12) (S-13) [10] Jack CBA (S-14) [11] Inverter Power CBA Fig. D3 A03P3DC...
  • Page 15 [17] PCB Holder (S-20) [15] Shield Box [14] Jack Holder (S-17) (S-18) (S-18) (H-1) (S-15) (S-20) (S-19) (S-15) (S-18) (S-20) [12] Tuner Shield [16] Digital Main CBA Unit (S-18) (S-16) (S-16) [13] Power Supply CBA (S-16) Fig. D4 A03P3DC...
  • Page 16 (S-26) [21] LCD Module [22] Front Cabinet Assembly (S-24) [20] Wall Mount Bracket(R) (S-25) [20] Wall Mount Bracket(L) (S-24) [18] AC Inlet Holder (S-25) (S-22) (S-21) (S-22) (S-23) (S-25) (S-23) [19] Stand Bracket (S-26) Fig. D5 A03P3DC...
  • Page 17 3. TV Cable Wiring Diagram To LCD To LCD Module Module Assembly Assembly Power Supply CBA Inverter Power CBA CN3711 CN3903 CN452 CN402 CN3701 CN1851 CN1852 CN404 CN3702 CN453 CN403 CN3703 CN1810 CN1801 CN610 CN401 CN600 CN3704 Digital Main CL202B CBA Unit CN601 CN802...

  • Page 18: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: “CBA” is abbreviation for 1. Purity Check Mode “Circuit Board Assembly.” This mode cycles through full-screen displays of red, Note: Electrical adjustments are required after green, blue, and white to check for non-active pixels. replacing circuit components and certain 1.
  • Page 19 2. Auto Calibration [Component] 3. Auto Calibration [PC] Purpose: To bring the color adjustment of each Purpose: To bring the color adjustment of PC into component into standard alignment. standard alignment. Symptom of Misadjustment: If this adjustment is Symptom of Misadjustment: If this adjustment is incorrect, component signals do not reproduce the incorrect, PC signals do not reproduce the corresponding color.

  • Page 20: White Balance Adjustment

    The White Balance Adjustment should be 4. Enter the Service mode. Press [ -] button on the service remote control unit and select “C/D” mode. performed when replacing the LCD Panel 5. [CUTOFF] or Digital CBA. Press [3] button to select “COB” for Blue Cutoff 4.

  • Page 21: 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 22: Firmware Renewal Mode

    FIRMWARE RENEWAL MODE Equipment Required 9. When the firmware update is completed, the following will appear on the screen. a. USB storage device (Example) b. Remote Control Unit Firmware Update Procedure [Preparation] 1. Prepare a blank USB storage device. 2. Copy “pkg” file (example: funai_LC7_WHD_ ZF536232PB10S-001.pkg) to USB storage device.

  • Page 23: Troubleshooting

    TROUBLESHOOTING FLOW CHART NO.1 The power cannot be turned on. See FLOW CHART No.2 <The fuse blows out.> Is the fuse (F601) normal? Check if there is any leak or short-circuiting on the primary circuit component, and service it if defective. (IC607, IC621, Q621, Q622, Q623, D609, D610, D611, D612, T601, T602) Is approximately 15V voltage supplied to the cathode...
  • Page 24 FLOW CHART NO.5 LCD+12V is not output. Check D504, D505, C503 and their periphery circuit, and service it defective. Check Q504, Q505, D501, P-ON-H1 line and their periphery circuit, and service it defective. FLOW CHART NO.6 AL+3.3V is not output. Is approximately 6V voltage supplied to the collector Check D525, D527, D528, C516 and their periphery of Q521?
  • Page 25 FLOW CHART NO.9 AL+5V is not output. Check if there is any leak or short-circuit on the loaded circuit, and service it if defective. FLOW CHART NO.10 P-ON+3.3V is not output. Replace Q510. FLOW CHART NO.11 P-ON+9V is not output. Is approximately 10V voltage supplied to the base of Q517? Replace Q517.
  • Page 26 FLOW CHART NO.13 No operation is possible from the remote control unit. Check AL+3.3V line and service it if defective. Replace the RS102 (remote control receiver) or remote control unit. Check the line between Pin(1) of RS102 (remote control receiver) and Pin(13) of CN403, and service it if defective.
  • Page 27 FLOW CHART NO.15 Picture does not appear normally. (Tuner input (Digital)) Check the line between Pin(16, 18) of CN403 and Are the DIF signals outputted to Pin(16, 18) of CN403? Pin(4, 5) of TU1, and TU1(Tuner Unit), and service it if defective.

  • Page 28: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram A03P3BLS...
  • Page 29 Video Block Diagram A03P3BLV...
  • Page 30 Audio Block Diagram A03P3BLA...
  • Page 31 Digital Signal Process Block Diagram A03P3BLD...
  • Page 32 Inverter Power Block Diagram A03P3BLINV...
  • Page 33 Power Supply Block Diagram A03P3BLP...

  • Page 34: 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 35 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 36 Power Supply 1 Schematic Diagram CAUTION ! NOTE: CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using For continued protection against fire hazard, If Main Fuse (F601) is blown , check to see that all components in the power supply hot GND as a common terminal.
  • Page 37 Power Supply 2 Schematic Diagram 10-4 A03P3SCP2...
  • Page 38 Power Supply 3 & Jack Schematic Diagram 10-5 A03P3SCP3...
  • Page 39 Inverter Power Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. 10-6 A03P3SCINP...
  • Page 40 IR Sensor & Function Schematic Diagram 10-7 A03P3SCIRF...
  • Page 41 Digital Main 1 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. 10-8 A03P3SCD1...
  • Page 42 Digital Main 2 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. 10-9 A03P3SCD2...
  • Page 43 Digital Main 3 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. 10-10 A03P3SCD3...
  • Page 44 Digital Main 4 Schematic Diagram 10-11 A03P3SCD4...
  • Page 45 Digital Main 5 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. 10-12 A03P3SCD5...
  • Page 46 Digital Main 6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. 10-13 A03P3SCD6...
  • Page 47 Digital Main 7 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. 10-14 A03P3SCD7...
  • Page 48 Power Supply CBA & Jack CBA Top View CAUTION ! NOTE: Because a hot chassis ground is present in the power supply Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using circuit, an isolation transformer must be used when repairing.
  • Page 49 Power Supply CBA & Jack CBA Bottom View CAUTION ! CAUTION ! Because a hot chassis ground is present in the power supply For continued protection against fire hazard, Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. circuit, an isolation transformer must be used when repairing.
  • Page 50 Inverter Power CBA, Function CBA & IR Sensor CBA Top View Because a hot chassis ground is present in the power supply NOTE: circuit, an isolation transformer must be used when repairing. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input slowly, hot GND as a common terminal.
  • Page 51 Inverter Power CBA, Function CBA & IR Sensor CBA Bottom View Because a hot chassis ground is present in the power supply NOTE: circuit, an isolation transformer must be used when repairing. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input slowly, hot GND as a common terminal.

  • Page 52: Waveforms

    WAVEFORMS WF1 ~ WF6 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 2 of CN404 Pin 8 of CN404 20µs VIDEO-Y 0.2V 20µs VIDEO 0.2V 20µs Pin 27 of CN401 Pin 6 of CN404...
  • Page 53 WF7 ~ WF10 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 22 of CN401 Pin 26 of CN404 WF10 AUDIO(L) 0.5V 0.5ms VIDEO-R 0.5V 20µs Pin 29 of CN404 VIDEO-B 0.5V...

  • Page 54: Wiring Diagram

    WIRING DIAGRAMS A03P3WI 12-1...

  • Page 55: Exploded View

    EXPLODED VIEWS Cabinet CL3903 CL1852 CL452 Power Supply CBA CL402 CL404 Function CBA CL403 X3301 CL401 CL802 Digital Main CBA Unit CL103A CL453 CL201A X803 SP802 Jack CBA CL801 SP801 LCD-1 IR Sensor CBA CL601 Inverter Power CBA See Electrical Parts List for parts with this mark.
  • Page 56 Packing Some Ref. Numbers are not in sequence. Stand Cover Assembly Packing Tape Tape AC601 Packing Tape Packing Tape F R O F R O PP Band 13-2 A03P0PEX...

  • Page 57: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. ! have special characteristics important to safety. SCREW TAP TIGHT M3X10 BIND HEAD+BLK GBHS3100 Before replacing any of these components, read SCREW P-TIGHT 3X12 BIND HEAD+ BLK GBHP3120 carefully the product safety notice in this service SHOULDER SCREW A01Q0UF...

  • Page 58: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. ! have special characteristics important to safety. C207 CHIP CERAMIC CAP . CH J 330pF/50V CHD1JJ3CH331 Before replacing any of these components, read C213 CHIP CERAMIC CAP .(1608) CH J 100pF/50V CHD1JJ3CH101 carefully the product safety notice in this service C214...
  • Page 59 Ref. No. Description Part No. Ref. No. Description Part No. C515 ELECTROLYTIC CAP 3300µF/10V or CE1AMZNDL332 C813 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 ELECTROLYTIC CAP . 3300µF/10V M CE1AMZPDL332 C814 CHIP CERAMIC CAP .(1608) B K 1µF/25V CHD1EK30B105 C516 ELECTROLYTIC CAP .
  • Page 60 Ref. No. Description Part No. Ref. No. Description Part No. DIODES D508 DIODE ZENER 8V2BSA-T26 or NDTA8R2BST26 DIODE ZENER HZS8.2NB1TE-EQ QDTA0HZS8R2N D183 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D511 SCHOTTKY BARRIER DIODE SB340 NDWZ000SB340 DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D514 DIODE FR154 or NDLZ000FR154 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F...
  • Page 61 Ref. No. Description Part No. Ref. No. Description Part No. IC SHUNT REGULATOR SL431A-AT or NSZBA0TAUK01 COILS IC SHUNT REGULATOR AS431BZTR-E1 NSZBA0TBCD01 WIRE COPPER 6111-06003-0120 or XZ40C0SHG002 D554 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 WIRE COPPER JP0.6MM XZ40C0AKM001 DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 WIRE COPPER 6111-06003-0120 or XZ40C0SHG002...
  • Page 62 Ref. No. Description Part No. Ref. No. Description Part No. TRANSISTOR KTA-1266-GR-AT/P or NQS4KTA1266P TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P TRANSISTOR 2SA1015-Y(TE2 F T) or QQSY2SA1015F TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P TRANSISTOR 2SA1015-GR(TE2 F T) or QQS12SA1015F TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F PNP TRANSISTOR 2SA1980Y-AT or NQSY02SA1980 TRANSISTOR 2SC1815-GR(TE2 F T) or...
  • Page 63 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 0 Ω or TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F RRXA000YF002 RES CHIP 1608 1/10W 0 Ω NPN TRANSISTOR 2SC5343Y-AT or NQSY02SC5343 RRJ000WAL002 CHIP RES. 1/10W J 47k Ω or NPN TRANSISTOR 2SC5343G-AT or NQSG02SC5343 R208...
  • Page 64 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 75 Ω CHIP RES. 1/10W J 100 Ω or RRJ750WAL002 R335 RRXAJR5Z0101 CHIP RES. 1/10W J 6.8k Ω or RES CHIP 1608 1/10W J 100 Ω or R311 RRXAJR5Z0682 RRXA101YF002...
  • Page 65 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM T 1/4W J 22k Ω RES CHIP 1608 1/10W 0 Ω RCX4223T1001 RRJ000WAL002 CHIP RES. 1/10W J 10k Ω or R545 RRXAJR5Z0103 R590 WIRE COPPER 6111-06003-0120 or XZ40C0SHG002 RES CHIP 1608 1/10W J 10k Ω...
  • Page 66 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM 1/4W J 5.6 Ω or R651 RCX45R6FS002 JACK SW DIN PCB S 04 MDC-076H-A LF JYEJ040LY002 RES CARBON FILM T 1/4W J 5.6 Ω RCX45R6T1001 JK211 JACK RCA PCB S YELLOW 01/RCA-101H(YL) JXRJ010YUQ05 RES CARBON FILM 1/4W J 5.6 Ω...
  • Page 67 INVERTER ASSEMBLY Ref. No. Description Part No. C1872 POLYESTER FILM CAP . (PB FREE) 0.047µF/ CA2A473DT018 Ref. No. Description Part No. 100V J or INVERTER ASSEMBLY A03P3M1V-001 CAP POLYESTER FILM 0.047µF/100V J or CA2A473SER02 Consists of the following: CAP POLYESTER FILM 0.047µF/100V/J/PCMT CTA473PKR003 INVERTER POWER CBA ----------...
  • Page 68 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM T 1/4W J 2.2k Ω TRANSISTORS RCX4222T1001 RES CARBON FILM T 1/4W J 39k Ω or R1805 RCX4393T1001 Q1801! FET MOS 2SK3561(Q) IDSS100UA or QFWZ2SK3561Q RES CARBON FILM 1/4W J 39k Ω RCX4393FS002 MOS FET 2SK3561(Q.M) or QFQZSK3561QM...
  • Page 69 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM T 1/4W G 3.3k Ω or R1880 RCX4332T1002 C115 CERAMIC CAP .(AX) B K 330pF/50V or CCA1JKT0B331 RES CARBON FILM 1/4W G 3.3k Ω RCG332PAK001 CAP CERAMIC (AX) 330pF/50V/B/K CA1J331TU061 RES CARBON FILM 1/4W J 2.7k Ω...
  • Page 70 LT8-M40BB A03P3PH 2011-01-11 Ver.1...

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