FUNAI LT6-M32BB Service Manual
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FUNAI LT6-M32BB Service Manual

FUNAI LT6-M32BB Service Manual

32″ color lcd television
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SERVICE MANUAL
This Service Manual is for the
LT6-M32BB(A8CFAEP) / LT6-M32BB(A8CFBEP) model.
For the LT6-M32BB(A8CFAEP) / LT6-M32BB(A8CFBEP) model, the letter
(A8CFAEP) / (A8CFBEP) is printed on the Rating Label on the back of the
unit. Refer to the Rating Label below.
Rating Label
Rating Label
"A8CFAEP"
"A8CFBEP"
32" COLOR LCD TELEVISION
LT6-M32BB

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Summary of Contents for FUNAI LT6-M32BB

  • Page 1 SERVICE MANUAL This Service Manual is for the LT6-M32BB(A8CFAEP) / LT6-M32BB(A8CFBEP) model. For the LT6-M32BB(A8CFAEP) / LT6-M32BB(A8CFBEP) model, the letter (A8CFAEP) / (A8CFBEP) is printed on the Rating Label on the back of the unit. Refer to the Rating Label below.

  • Page 2: Table Of Contents

    32″ COLOR LCD TELEVISION LT6-M32BB TABLE OF CONTENTS Specifications ................1-1 Important Safety Precautions.

  • Page 3: Specifications

    SPECIFICATIONS < TUNER > VHF/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 1366 1.
  • Page 4 < AUDIO > All items are measured across 16 Ω load at speaker output terminal. Description Condition Unit Nominal Limit 1. Audio Output Power 10% THD: Lch/Rch 5.0/5.0 4.0/4.0 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/ 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 13 [4] Rear Cabinet (S-4) (S-4) (S-6) (S-4) (S-5) (S-6) (S-1) (S-4) (S-4) [3] Stand Hinge [2] Stand Cover [1] Stand Base Plate (S-3) (S-2) (S-3) Fig. D1 A8CFADC...
  • Page 14 [7] Digital Main CBA Unit (S-11) Connector IC Card OSU [6] Shield Box (S-10) (S-9) (S-8) (S-9) (S-10) [5] FFC Shield [8] Shield (T) (S-12) (S-7) [10] Junction-B CBA (S-13) (S-13) (S-13) [9] Power Supply CBA (S-13) Fig. D2 A8CFADC...
  • Page 15 [18] Front Cabinet [12] LCD Module Assembly [17] Speaker (S-18) [16] Speaker Holder(s) [L,R] (S-18) [17] Speaker (S-18) [16] Speaker Holder(s) [L,R] (S-18) [13] Junction-A (S-17) (S-16) [14] IR Sensor (S-15) [15] Function (S-14) (S-14) [11] Inverter CBA (S-14) Fig. D3 A8CFADC...
  • Page 16 TV Cable Wiring Diagram To LCD Module Assembly Digital Main To LCD CBA Unit Module Assembly CN804 CN803B CN4501 CN4502 Junction-B Inverter CBA CN3601 CN3701 CN4503 CN3704 CN1050 Power Supply CN1100 CN1000 CN104A CN101A CN102A CN103A CN803A CN1150 CN1200 CN1901 CLN400 AC CORD CN801...

  • Page 17: 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 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. 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 [ ] button on the remote control unit.

  • Page 21: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram A8CFABLS...
  • Page 22 Video Block Diagram A8CFABLV...
  • Page 23 Audio-1 Block Diagram A8CFABLA1...
  • Page 24 Audio-2 Block Diagram A8CFABLA2...
  • Page 25 Digital Signal Process Block Diagram A8CFABLD...
  • Page 26 Inverter Block Diagram A8CFABLINV...
  • Page 27 Power Supply Block Diagram A8CFABLP...

  • Page 28: 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 29 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 (F1901) 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 30 Power Supply 1/4 Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. A8CFASCP1...
  • Page 31 Power Supply 2/4 Schematic Diagram A8CFASCP2...
  • Page 32 Power Supply 3/4 Schematic Diagram A8CFASCP3...
  • Page 33 Power Supply 4/4 Schematic Diagram A8CFASCP4...
  • Page 34 Inverter & Junction-B Schematic Diagram CAUTION ! NOTE: CAUTION ! 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. replace only with the same type fuse.
  • Page 35 Function Schematic Diagram A8CFASCF...
  • Page 36 IR Sensor & Junction-A Schematic Diagram A8CFASCIR...
  • Page 37 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 seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section. 8-10 A8CFASCD1...
  • Page 38 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 seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section. 8-11 A8CFASCD2...
  • Page 39 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 seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section. 8-12 A8CFASCD3...
  • Page 40 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 seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section. 8-13 A8CFASCD4...
  • Page 41 Digital Main 5/6 Schematic Diagram 8-14 A8CFASCD5...
  • Page 42 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 seven and shown as IC4513 (1/5) ~ IC4513 (4/5) in this Digital Main Schematic Diagram Section. 8-15 A8CFASCD6...
  • Page 43 Power Supply CBA Top View NOTE: Because a hot chassis ground is present in the power The voltage for parts in hot circuit is measured using supply circut, an isolation transformer must be used. hot GND as a common terminal. Also, in order to have the ability to increase the input slowly, when troubleshooting this type power supply circuit, a variable isolation transformer is required.
  • Page 44 Power Supply CBA Bottom View NOTE: Because a hot chassis ground is present in the power The voltage for parts in hot circuit is measured using supply circut, an isolation transformer must be used. hot GND as a common terminal. Also, in order to have the ability to increase the input slowly, when troubleshooting this type power supply circuit, a variable isolation transformer is required.
  • Page 45 Inverter CBA Top View CAUTION ! CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. For continued protection against fire hazard, Because a hot chassis ground is present in the power If Main Fuse (F1901) is blown , check to see that all components in the power supply replace only with the same type fuse.
  • Page 46 Inverter CBA Bottom View CAUTION ! CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. For continued protection against fire hazard, Because a hot chassis ground is present in the power If Main Fuse (F1901) is blown , check to see that all components in the power supply replace only with the same type fuse.
  • Page 47 Function CBA Top View IR Sensor CBA Top View Function CBA Bottom View IR Sensor CBA Bottom View BA8CF0F01013-4 BA8CF0F01013-3 8-20...
  • Page 48 Junction-A CBA Junction-A CBA Top View Bottom View BA8CF0F01013-2 Junction-B CBA Junction-B CBA Top View Bottom View BA8CF0F01013 8-21...

  • Page 49: 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 1 of CN102A Pin 18 of CN101A 20µs COMPONENT-Y 0.2V 20µs VIDEO 0.2V 20µs Pin 23 of CN101A Pin 20 of CN101A...
  • Page 50 WF7 ~ WF10 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 5 of CN102A Pin 3 of CN103A WF10 VIDEO-B 0.5V 20µs AUDIO(L) 0.5V 0.5ms Pin 4 of CN102A VIDEO-G 0.5V...

  • Page 51: Wiring Diagram

    WIRING DIAGRAMS A8CFAWI 10-1...

  • Page 52: Exploded View

    EXPLODED VIEWS Cabinet Digital Main CBA Unit L21 L24 CN3802 CL4502 CL4501 CL802 SP802 CL801 SP801 Junction-A CL103A CL102A CL101A CL104A Junction-B CBA IR Sensor CBA Function CBA LCD1 Power Supply CBA Inverter CBA See Electrical Parts List for parts with this mark. AC1901 11-1 A8CFACEX...
  • Page 53 Packing Some Ref. Numbers are not in sequence. Packing Tape X2-1, X2-2, X2-3 Tape Packing Tape Tape Packing Tape 11-2 A8CFAPEX...

  • Page 54: Mechanical Parts List

    Comparison Chart of Models and Marks Ref. No. Mark Description Part No. RATING LABEL A8CFAEP ---------- Model Mark RATING LABEL A8CFBEP ---------- LT6-M32BB (A8CFAEP) POP LABEL A8CN6EP ---------- LT6-M32BB (A8CFBEP) POP LABEL A8CFBEP ---------- CARD LABEL A8CN0FP ---------- GASKET A71F0UH 1EM424393 Ref.

  • Page 55: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. ! have special characteristics important to safety. C226 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 Before replacing any of these components, read C227 CHIP CERAMIC CAP . F Z 0.47µF/10V CHD1AZ30F474 carefully the product safety notice in this service C228...
  • Page 56 Ref. No. Description Part No. Ref. No. Description Part No. C327 CHIP CERAMIC CAP .(1608) B K 1µF/10V CHD1AK30B105 C658 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 C328 CHIP CERAMIC CAP .(1608) B K 1µF/10V CHD1AK30B105 C659 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 C329 ELECTROLYTIC CAP .
  • Page 57 Ref. No. Description Part No. Ref. No. Description Part No. FFC CONNECTOR IMSA-9615S-25A-PP-A or JC96J25ER007 D338 ZENER DIODE MTZJT-775.6B QDTB0MTZJ5R6 CONNECTOR PRINT MES 00 6232 025 006 JC62G25UG026 D401 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 800+ DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 CN102A FMN CONNECTOR TOP25P 25FMN-BTK- JCFNG25JG019 D402!
  • Page 58 Ref. No. Description Part No. Ref. No. Description Part No. D646 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 L802 CHOKE COIL(22µH) LHL10NB220K or LLARKGQTU220 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 POWER INDUCTORS CWKBNP-220K LLF2200KV002 D647 SCHOTTKY BARRIER DIODE ERB81-004 or AERB81004*** L803 CHOKE COIL(22µH) LHL10NB220K or LLARKGQTU220 SCHOTTKY BARRIER DIODE SB240-B/P or NDQZ000SB240...
  • Page 59 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 100 Ω TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F RRXA101YF002 CHIP RES. 1/10W J 100 Ω or NPN TRANSISTOR 2SC5343G-AT or NQSG02SC5343 R216 RRXAJR5Z0101 RES CHIP 1608 1/10W J 100 Ω NPN TRANSISTOR 2SC5343MG-AT NQSG2SC5343M RRXA101YF002...
  • Page 60 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 75 Ω CHIP RES. 1/10W J 560 Ω or RRXA750YF002 R344 RRXAJR5Z0561 CHIP RES.(1608) 1/10W 0 Ω or RES CHIP 1608 1/10W J 560 Ω R308 RRXAZR5Z0000 RRXA561YF002...
  • Page 61 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 2.2k Ω or RES CARBON FILM 1/4W J 2.7k Ω R547 RRXAJR5Z0222 RCX4272FS002 RES CHIP 1608 1/10W J 2.2k Ω RRXA222YF002 R644 PCB JUMPER D0.6-P5.0 JW5.0T CHIP RES.
  • Page 62 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM 1/4W J 47k Ω RCX4473FS002 R853 PCB JUMPER D0.6-P5.0 JW5.0T CHIP RES. 1/10W J 10k Ω or R676 RRXAJR5Z0103 R854 PCB JUMPER D0.6-P5.0 JW5.0T RES CHIP 1608 1/10W J 10k Ω CHIP RES.(1608) 1/10W 0 Ω...
  • Page 63 Ref. No. Description Part No. Ref. No. Description Part No. D102 LED(GREEN) LTL-4234 or NPWZ0LTL4234 TACT SWITCH KSM0612B SST0101HH003 LED GREEN 333GT/E(FNA) NPWZ33GTEFNA SW114 TACT SWITCH SKQSAB or SST0101AL038 RESISTORS TACT SWITCH TC-1104(H=5.0) or SST0101DNG02 CARBON RES. 1/4W J 100 Ω or TACT SWITCH KSM0612B SST0101HH003 R101...
  • Page 64 Ref. No. Description Part No. Ref. No. Description Part No. C1067 CHIP CERAMIC CAP .(1608) B K 0.01µF/50V CHD1JK30B103 SAFETY CAP . 1000pF/250V KX or CA2E102MR050 C1101 CHIP CERAMIC CAP .(1608) B K 1000pF/50V CHD1JK30B102 CAP CERAMIC 1000pF/250V/M CA2E102MR086 C1103 CHIP CERAMIC CAP .(1608) B K 1000pF/50V CHD1JK30B102 C1911...
  • Page 65 Ref. No. Description Part No. Ref. No. Description Part No. D1068 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 D1266 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D1110 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 D1267...
  • Page 66 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W F 1M Ω or TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P RRXAFR5Z1004 RES CHIP 1608 1/10W F 1.00M Ω TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F RTW1004YF002 CHIP RES. 1/10W F 120 k Ω or NPN TRANSISTOR 2SC5343MG-AT or NQSG2SC5343M R1010...
  • Page 67 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W F 6.80k Ω CHIP RES. 1/10W J 1M Ω or RTW6801YF002 R1170 RRXAJR5Z0105 CHIP RES. 1/10W J 1M Ω or RES CHIP 1608 1/10W J 1.0M Ω R1070 RRXAJR5Z0105 RRXA105YF002...
  • Page 68 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W F 47.0k Ω RES CARBON FILM 1/4W J 2.2k Ω RTW4702YF002 RCX4222FS002 CHIP RES. 1/10W F 1.0k Ω or CARBON RES. 1/4W J 680k Ω or R1501 RRXAFR5H1001 R1940...
  • Page 69 Ref. No. Description Part No. HEAT SINK PMI ASSEMBLY A71F0UH 1EM424257 BC1000 PCB JUMPER D0.6-P5.0 JW5.0T BC1931 BEADS INDUCTOR FBR07HA121SB-00 LLBF00STU030 BC1932 BEADS INDUCTOR FBR07HA121SB-00 LLBF00STU030 F1901! FUSE 4A/250V(PB FREE) 0215004.MXP PBGZ20BAG021 FH1901 FUSE HOLDER MSF-015 LF (B110) XH01Z00LY002 FH1902 FUSE HOLDER MSF-015 LF (B110) XH01Z00LY002 SCREW B-TIGHT D3X8 BIND HEAD+...
  • Page 70 LT6-M32BB A8CFAEP/FBEP 2009-02-20...

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