FUNAI LT6-B32BB Service Manual
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FUNAI LT6-B32BB Service Manual

32" color lcd television
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SERVICE MANUAL

This Service Manual is for the
Rating Label
LT6-B32BB(A8CF5BP) model.
For the LT6-B32BB(A8CF5BP)
model, the letter (A8CF5BP) is
printed on the Rating Label on the
back of the unit. Refer to the
Rating Label on the right.
"A8CF5BP"
32" COLOR LCD TELEVISION
LT6-B32BB

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Summary of Contents for FUNAI LT6-B32BB

  • Page 1: Service Manual

    SERVICE MANUAL This Service Manual is for the Rating Label LT6-B32BB(A8CF5BP) model. For the LT6-B32BB(A8CF5BP) model, the letter (A8CF5BP) is printed on the Rating Label on the back of the unit. Refer to the Rating Label on the right. "A8CF5BP"...

  • Page 2: Table Of Contents

    32″ COLOR LCD TELEVISION LT6-B32BB 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: Instructions For Handling Semi- Conductors

    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 A8CF5DC...
  • 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-14) (S-14) (S-14) [9] Power Supply CBA (S-13) Fig. D2 A8CF5DC...
  • Page 15 [18] Front Cabinet [12] LCD Module Assembly [17] Speaker (S-18) [16] Speaker Holder (L,R) (S-18) [17] Speaker (S-18) [16] Speaker Holder (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 A8CF5DC...
  • 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 General Note: “CBA” is abbreviation for How to set up the service mode: “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: White Balance Adjustment

    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 A8CF5BLS...
  • Page 22 Video Block Diagram A8CF5BLV...
  • Page 23 Audio-1 Block Diagram A8CF5BLA1...
  • Page 24 Audio-2 Block Diagram A8CF5BLA2...
  • Page 25 Digital Signal Process Block Diagram A8CF5BLD...
  • Page 26 Inverter Block Diagram A8CF5BLINV...
  • Page 27 Power Supply Block Diagram A8CF5BLP...

  • 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. A8CF5SCP1...
  • Page 31 Power Supply 2/4 Schematic Diagram A8CF5SCP2...
  • Page 32 Power Supply 3/4 Schematic Diagram A8CF5SCP3...
  • Page 33 Power Supply 4/4 Schematic Diagram A8CF5SCP4...
  • 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 A8CF5SCF...
  • Page 36 IR Sensor & Junction-A Schematic Diagram A8CF5SCIR...
  • 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 A8CF5SCD1...
  • 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 A8CF5SCD2...
  • 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 A8CF5SCD3...
  • 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 A8CF5SCD4...
  • Page 41 Digital Main 5/6 Schematic Diagram 8-14 A8CF5SCD5...
  • 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 A8CF5SCD6...
  • 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 BA8CF0F01012-4 BA8CF0F01012-3 8-20...
  • Page 48 Junction-A CBA Junction-A CBA Top View Bottom View BA8CF0F01012-2 Junction-B CBA Junction-B CBA Top View Bottom View BA8CF0F01012 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 A8CF5WI 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 A8CF5CEX...
  • Page 53 Packing Some Ref. Numbers are not in sequence. Packing Tape X2-9 Tape Packing Tape Tape Packing Tape 11-2 A8CF5PEX...

  • Page 54: 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 A8CF5BP ---------- carefully the product safety notice in this service GASKET A71F0UH 1EM424393 manual.

  • 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. C224 ELECTROLYTIC CAP . 47µF/16V M CE1CMASDL470 Before replacing any of these components, read C225 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 carefully the product safety notice in this service C226...
  • Page 56 Ref. No. Description Part No. Ref. No. Description Part No. C323 CHIP CERAMIC CAP .(1608) CH J 390pF/50V CHD1JJ3CH391 C656 ELECTROLYTIC CAP . 1000µF/6.3V M CE0KMASDL102 C324 CHIP CERAMIC CAP .(1608) B K 1µF/10V CHD1AK30B105 C657 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 C327 CHIP CERAMIC CAP .(1608) B K 1µF/10V...
  • Page 57 Ref. No. Description Part No. Ref. No. Description Part No. CONNECTORS D336 ZENER DIODE MTZJT-773.9B QDTB0MTZJ3R9 D337 ZENER DIODE MTZJT-775.6B QDTB0MTZJ5R6 CN101A FMN CONNECTOR TOP25P 25FMN-BTK- JCFNG25JG019 A(LF)(SN) or D338 ZENER DIODE MTZJT-775.6B QDTB0MTZJ5R6 FFC CONNECTOR IMSA-9615S-25A-PP-A or JC96J25ER007 D401 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 CONNECTOR PRINT MES 00 6232 025 006...
  • Page 58 Ref. No. Description Part No. Ref. No. Description Part No. D645 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 L801 CHOKE COIL(22µH) LHL10NB220K or LLARKGQTU220 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 POWER INDUCTORS CWKBNP-220K LLF2200KV002 D646 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 L802 CHOKE COIL(22µH) LHL10NB220K or LLARKGQTU220 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148...
  • Page 59 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 100 Ω Q631 TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P RRXA101YF002 CHIP RES. 1/10W J 100 Ω or TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P R215 RRXAJR5Z0101 RES CHIP 1608 1/10W J 100 Ω TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F RRXA101YF002...
  • Page 60 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 100 Ω CHIP RES. 1/10W J 47k Ω or RRXA101YF002 R343 RRXAJR5Z0473 CHIP RES. 1/10W J 75 Ω or RES CHIP 1608 1/10W J 47k Ω R307 RRXAJR5Z0750 RRXA473YF002...
  • Page 61 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 2.2k Ω or R601 PCB JUMPER D0.6-P5.0 JW5.0T R654 RCX4JATZ0222 CARBON RES. 1/4W J 22k Ω or RES CARBON FILM T 1/4W J 2.2k Ω R605 RCX4JATZ0223 RCX4222T1001 RES CARBON FILM T 1/4W J 22k Ω...
  • Page 62 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 0 Ω RRXA000YF002 CLN400 WIRE ASSEMBLY ANALOG-INV 2PIN 2PIN/ WX1A8CF0-006 90MM/AWG18 CHIP RES. 1/10W J 39k Ω or R710 RRXAJR5Z0393 JK202 JACK RCA PCB S 03 RCA-347HT-03 or JXRJ030YUQ01 RES CHIP 1608 1/10W J 39k Ω...
  • Page 63 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W G 4.7k Ω or R121 RCX4GATZ0472 C1002 CHIP CERAMIC CAP .(1608) B K 1000pF/50V CHD1JK30B102 RES CARBON FILM T 1/4W G 4.7k Ω RCX4472T1002 C1003 CHIP CERAMIC CAP .(1608) B K 1000pF/50V CHD1JK30B102 CARBON RES.
  • Page 64 Ref. No. Description Part No. Ref. No. Description Part No. C1362 CAP CERAMIC (AX) 1500pF/50V/B/K or CA1J152TU061 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 CERAMIC CAP .(AX) B 1500pF/50V CCK1JKT0B152 D1002 ZENER DIODE MTZJT-776.2B QDTB0MTZJ6R2 C1365 CAP CERAMIC (AX) 1500pF/50V/B/K or CA1J152TU061 D1003 ZENER DIODE MTZJT-776.2B QDTB0MTZJ6R2 CERAMIC CAP .(AX) B 1500pF/50V...
  • Page 65 Ref. No. Description Part No. Ref. No. Description Part No. DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 D1936 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D1168 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 D1970 ZENER DIODE MTZJT-775.6B QDTB0MTZJ5R6 D1210 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D1971...
  • Page 66 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 1.0M Ω NPN TRANSISTOR 2SC5343MG-AT or NQSG2SC5343M RRXA105YF002 CHIP RES. 1/10W J 1k Ω or NPN TRANSISTOR 2SC5343G-AT NQSG02SC5343 R1053 RRXAJR5Z0102 RES CHIP 1608 1/10W J 1.0k Ω Q1971 TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P...
  • Page 67 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 100k Ω or CHIP RES. 1/10W J 20k Ω or R1160 RRXAJR5Z0104 R1265 RRXAJR5Z0203 RES CHIP 1608 1/10W J 100k Ω RES CHIP 1608 1/10W J 20k Ω RRXA104YF002 RRXA203YF002 CHIP RES.
  • Page 68 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 47k Ω or R1931 RCX4JATZ0473 BC1931 BEADS INDUCTOR FBR07HA121SB-00 LLBF00STU030 RES CARBON FILM T 1/4W J 47k Ω RCX4473T1001 BC1932 BEADS INDUCTOR FBR07HA121SB-00 LLBF00STU030 R1932 PCB JUMPER D0.6-P5.0 JW5.0T F1901! FUSE 4A/250V(PB FREE) 0215004.MXP...
  • Page 69 LT6-B32BB A8CF5BP 2008-12-08...

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