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FUNAI LT5-M32BB Service Manual

32? color lcd television
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SERVICE MANUAL

32" COLOR LCD TELEVISION
LT5-M32BB

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Summary of Contents for FUNAI LT5-M32BB

  • Page 1: Service Manual

    SERVICE MANUAL 32″ COLOR LCD TELEVISION LT5-M32BB...

  • Page 2: Table Of Contents

    32″ COLOR LCD TELEVISION LT5-M32BB TABLE OF CONTENTS Specifications ................1-1 Important Safety Precautions.

  • Page 3: Specifications

    SPECIFICATIONS < TUNER > VHS/UHF Input ----------- 75Ω Unbal., IEC Connector Intermediate Freq. ------- Digital 36.167MHz, SECAM-L 38.9MHz, SECAM-L’ 33.9MHz, PAL BG/DK 38.9MHz Description Condition Unit Nominal Limit 1. Video S/N 2. Audio S/N 40/40 < LCD PANEL > Description Condition Unit Nominal...
  • 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 5.0/5.0 4.5/4.5 2. Audio Distortion 500mW: Lch/Rch 1.0/1.0 4.0/4.0 -6dB: Lch 100 to 12 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-6) [5] Function CBA (S-4) (S-5) (S-5) (S-4) (S-1) (S-4) [3] Stand Cover [2] Stand Hinge [1] Stand Base Plate (S-3) (S-3) (S-2) (S-2) Fig. D1 A73F2DC...
  • Page 14 [11] Digital Main CBA Unit [8] Jack Holder(D) (S-12) (S-11) (S-10) (S-9) [12] DVB-T Module CBA Unit Shield Box [10] Shield Box Top Bottom [9] Shield Plate (S-15) (S-13) (S-16) (S-7) (S-7) (S-8) (S-14) (S-8) [7] Power Supply CBA (S-8) (S-7) (S-7) [6] Chassis Bracket...
  • Page 15 [17] Panel Holder (S-20) (S-21) (S-20) [13] Jack Holder (A) [14] Jack CBA (S-17) (S-18) (S-20) Desolder (S-18) (S-19) (S-21) [16] Junction CBA (S-20) [15] Inverter CBA (S-19) (S-19) (S-19) (S-19) Fig. D3 A73F2DC...
  • Page 16 [22] Front Cabinet [19] LCD Module Assembly [21] Speaker (S-25) (S-25) (S-24) (S-23) [20] IR Sensor Shield Plate (S-22) (S-25) (S-25) [21] Speaker (S-22) (S-22) [18] T-CON CBA (S-23) Fig. D4 A73F2DC...
  • Page 17 TV Cable Wiring Diagram DVB-T Module CBA Unit To LCD Module Jack CBA Assembly CN7003 T-CON CBA CN7001 CN9002 CN9001 CN9005 CN9003 J1 J5 To LCD Function CBA Module CN102 Assembly Digital Main Junction CBA Unit Inverter CBA CN3501 CN552 CN1050 CN3302 CL552A...

  • Page 18: How To Initialize The Lcd Television

    HOW TO INITIALIZE THE LCD TELEVISION How to initialize the LCD television: 1. Turn the power off. 2. To enter the service mode, while pressing [MENU] button, press [STANDBY-ON] button on the TV unit. - To cancel the service mode, press [STANDBY- ON] button on the remote control.

  • Page 19: 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 20 BUTTON BUTTON DATA DATA ITEM (on the remote ITEM (on the remote VALUE VALUE control) control) -] → [5] DG(C/D/S 1) -] → [6] DB(C/D/S 1) -] → [7] CLR-R SBR(C/D/S 1) [MENU(YUV)] → [4] YUV D4 -] → [9] CLR-B SBB(C/D/S 1) -] →...

  • Page 21: Flicker Adjustment

    2. Purity Check Mode 3. Flicker Adjustment This mode cycles through full-screen displays of red, *This adjustment is required when reparing T-CON green, blue, and white to check for non-active pixels. CBA. 1. Enter the Service mode. Test Point Adj. Point 2.

  • Page 22: White Balance Adjustment

    he following adjustment normally are not [YUV] Enter the Service mode. Press [ -] button on the attempted in the field. Only when replacing the remote control unit and select “C/D/S 2” mode. LCD Panel then adjust as a preparation. [RGB] Enter the Service mode.

  • Page 23: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram A73F2BLS...
  • Page 24 Video Block Diagram A73F2BLV...
  • Page 25 Audio-1 Block Diagram A73F2BLA1...
  • Page 26 Audio-2 Block Diagram A73F2BLA2...
  • Page 27 Digital Signal Process Block Diagram A73F2BLD...
  • Page 28 Inverter Block Diagram A73F2BLINV...
  • Page 29 Power Supply Block Diagram A73F2BLP...

  • Page 30: Schematic Diagrams / Cba's And Test Points

    SCHEMATIC DIAGRAMS / CBA’S 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 31 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 (F501) 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 32 Power Supply 1/3 Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. VOLTAGE CHART CN301 Pin No. Voltage 12.1 12.1 15.9 32.1 A73F2SCP1...
  • Page 33 Power Supply 2/3 Schematic Diagram VOLTAGE CHART CN302 Pin No. Voltage A73F2SCP2...
  • Page 34 Power Supply 3/3 Schematic Diagram VOLTAGE CHART CN303 Pin No. Voltage CN304 Pin No. Voltage A73F2SCP3...
  • Page 35 Inverter & Junction Schematic Diagram VOLTAGE CHART CN552 CAUTION ! Pin No. Voltage Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. CAUTION ! NOTE: For continued protection against fire hazard, If Main Fuse (F501) is blown , check to see that all components in the power supply The voltage for parts in hot circuit is measured using circuit are not defective before you connect the AC plug to the AC power supply.
  • Page 36 Jack 1/2 Schematic Diagram A73F2SCJ1...
  • Page 37 Jack 2/2 Schematic Diagram A73F2SCJ2...
  • Page 38 Function Schematic Diagram VOLTAGE CHART CN102 Pin No. Voltage A73F2SCF...
  • Page 39 IR Sensor Schematic Diagram 8-10 A73F2SCIR...
  • Page 40 Digital Main 1/6 Schematic Diagram 8-11 A73F2SCD1...
  • Page 41 Digital Main 2/6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3501. IC3501 is divided into four and shown as IC3501 (1/4) ~ IC3501 (4/4) in this Digital Main Schematic Diagram Section. 8-12 A73F2SCD2...
  • Page 42 Digital Main 3/6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3501. IC3501 is divided into four and shown as IC3501 (1/4) ~ IC3501 (4/4) in this Digital Main Schematic Diagram Section. 8-13 A73F2SCD3...
  • Page 43 Digital Main 4/6 Schematic Diagram 8-14 A73F2SCD4...
  • Page 44 Digital Main 5/6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3501. IC3501 is divided into four and shown as IC3501 (1/4) ~ IC3501 (4/4) in this Digital Main Schematic Diagram Section. 8-15 A73F2SCD5...
  • Page 45 Digital Main 6/6 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3501. IC3501 is divided into four and shown as IC3501 (1/4) ~ IC3501 (4/4) in this Digital Main Schematic Diagram Section. 8-16 A73F2SCD6...
  • Page 46 Power Supply CBA Top View Because a hot chassis ground is present in the power NOTE: supply circuit, an isolation transformer must be used. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input hot GND as a common terminal.
  • Page 47 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 circuit, 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 48 Jack CBA Top View 8-19 BA73F0F01032...
  • Page 49 Jack CBA Bottom View PIN 20 OF CN7001 PIN 18 OF CN7001 PIN 16 OF CN7001 PIN 14 OF CN7001 PIN 12 OF CN7001 PIN 10 OF CN7001 PIN 8 OF CN7001 8-20 BA73F0F01032...
  • Page 50 Inverter CBA Top View CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. CAUTION ! Because a hot chassis ground is present in the power If Main Fuse (F501) is blown , check to see that all components in the power supply For continued protection against fire hazard, supply circuit, an isolation transformer must be used.
  • Page 51 Inverter CBA Bottom View CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. CAUTION ! Because a hot chassis ground is present in the power If Main Fuse (F501) is blown , check to see that all components in the power supply For continued protection against fire hazard, supply circuit, an isolation transformer must be used.
  • Page 52 Function CBA Top View Function CBA Bottom View 8-23 BA73F0F01022-2...
  • Page 53 IR Sensor CBA Top View Junction CBA Top & Bottom View BA73F0F01042 IR Sensor CBA Bottom View BA73F0F01022-3 8-24...

  • Page 54: Waveforms

    WAVEFORMS WF1 ~ WF3 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 10 of CN7001 Pin 12 of CN7001 (VIDEO IN) (S-VIDEO IN) 20µs S-VIDEO-C 0.2V CVBS 0.2V...
  • Page 55 WF4 ~ WF7 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 16 of CN7001 Pin 8 of CN7001 0.5V 20µs AUDIO 0.5V 0.5ms Pin 14 of CN7001 0.5V 20µs Pin 18 of CN7001...

  • Page 56: Wiring Diagram

    WIRING DIAGRAMS A73F2WI 10-1...

  • Page 57: Exploded View

    EXPLODED VIEWS Cabinet Function CBA CLN102 LCD Module Assembly SP802 Jack CBA CLN802 CL3302 IR Sensor CBA CLN801 T-CON CBA SP801 CL4104 DVB-T Module CBA Unit Digital Main CBA Unit Inverter CBA Power Supply CBA Junction CL4105 CL7003 CL7001 See Electrical Parts List AC501 for parts with this mark.
  • Page 58 Packing Some Ref. Numbers are not in sequence. Packing Tape X2-2 Tape Packing Tape Packing Tape Packing Tape 11-2 A73F2PEX...

  • Page 59: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. ! have special characteristics important to safety. RUBBER CUSHION (10X10X20) A71F0UH 1EM424528 Before replacing any of these components, read RUBBER CUSHION (10X10X13) A71F0UH 1EM424527 carefully the product safety notice in this service SCREW P-TIGHT 4X14 BIND HEAD GBJP4140 manual.

  • Page 60: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. ! have special characteristics important to safety. POLYESTER FILM CAP . (PB FREE) 0.1µF/100V CA2A104DT018 Before replacing any of these components, read C607! SAFTY CAP . 1000pF/250V KX CA2E102MR101 carefully the product safety notice in this service C631...
  • Page 61 Ref. No. Description Part No. Ref. No. Description Part No. C801 ELECTROLYTIC CAP . 100µF/16V M or CA1C101SP085 C873 CHIP CERAMIC CAP .(1608) B K 5600pF/50V CHD1JK30B562 ELECTROLYTIC CAP . 100µF/16V M or CE1CMASTM101 C875 ELECTROLYTIC CAP . 4.7µF/16V M or CE1CMASDL4R7 ELECTROLYTIC CAP .
  • Page 62 Ref. No. Description Part No. Ref. No. Description Part No. D650 ZENER DIODE MTZJT-775.6B QDTB0MTZJ5R6 L805 INDUCTOR 22µH-K-5FT LLARKBSTU220 D651 SCHOTTKY BARRIER DIODE ERA81-004Q or QDLZRA81004Q L852 PCB JUMPER D0.6-P5.0 JW5.0T SCHOTTKY BARRIEA DIODE 11EQS04 or QD4Z011EQS04 TRANSISTORS SCHOTTKY BARRIER DIODE SB140 NDWZ000SB140 Q103 TRANSISTOR KTC3199-GR-AT/P or...
  • Page 63 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 3.3k Ω or TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P R663 RRXAJR5Z0332 RES CHIP 1608 1/10W J 3.3k Ω TRANSISTOR 2SC1815-GR(TE2 F T) QQS12SC1815F RRXA332YF002 CHIP RES. 1/10W J 6.8k Ω or RESISTORS R664 RRXAJR5Z0682...
  • Page 64 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 390k Ω or R802 RRXAJR5Z0394 BC601 BEADS INDUCTOR FBR07HA121SB-00 LLBF00STU030 RES CHIP 1608 1/10W J 390k Ω RRXA394YF002 BC602 BEADS INDUCTOR FBR07HA121SB-00 LLBF00STU030 CARBON RES. 1/4W J 1k Ω R804 RCX4JATZ0102 BC631...
  • Page 65 Ref. No. Description Part No. Ref. No. Description Part No. TACT SWITCH TC-1104(H=5.0) or SST0101DNG02 C7011 CHIP CERAMIC CAP . B K 2200pF/50V CHD1JK30B222 TACT SWITCH KSM0612B SST0101HH003 C7012 CHIP CERAMIC CAP . F Z 2.2µF/10V CHD1AZ30F225 SW112 TACT SWITCH SKQSAB or SST0101AL038 C7013 CHIP CERAMIC CAP .(1608) CH J 270pF/50V...
  • Page 66 Ref. No. Description Part No. Ref. No. Description Part No. C7701 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 DIODE ZENER SMD 015AZ5.6 Y QD1Y015AZ5R6 C7702 ELECTROLYTIC CAP . 47µF/16V M H7 or CE1CMAVSL470 D7008 ZENER DIODE EDZTE61 5.6B or QD1B00EDZ5R6 ALUMINUM ELECTROLYTIC CAP 47µF/16V H7 CE1CMAVSM470 DIODE ZENER SMD 015AZ5.6 Y...
  • Page 67 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 47k Ω or L7705 INDUCTOR 100µH-J-26T LLAXJATTU101 R7022 RRXAJR5Z0473 RES CHIP 1608 1/10W J 47k Ω TRANSISTORS RRXA473YF002 CHIP RES. 1/10W J 560 Ω or R7023 RRXAJR5Z0561 Q7001 TRANSISTOR KTC3199-GR-AT/P or...
  • Page 68 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W 0 Ω or CHIP RES. 1/10W J 100 Ω or R7058 RRXAZR5Z0000 R7706 RRXAJR5Z0101 RES CHIP 1608 1/10W J 0 Ω RES CHIP 1608 1/10W J 100 Ω RRXA000YF002 RRXA101YF002 CHIP RES.
  • Page 69 Ref. No. Description Part No. Ref. No. Description Part No. ELECTROLYTIC CAP . 47µF/35V M CE1GMASTM470 C1103 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 C515 PCB JUMPER D0.6-P5.0 JW5.0T C1104 CHIP CERAMIC CAP .(1608) CH J 390pF/50V CHD1JJ3CH391 C516 CAP POLYPROPYLENE 0.047µF/630V J CA2K473F7001 C1105...
  • Page 70 Ref. No. Description Part No. Ref. No. Description Part No. DIODES DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 D1110 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D502! DIODE 1N5408-B/P NDLZ001N5408 DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 D503! DIODE 1N5408-B/P NDLZ001N5408 D1111 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D504! DIODE 1N5408-B/P NDLZ001N5408 DIODE SWITCHING HSS4148TE-E...
  • Page 71 Ref. No. Description Part No. Ref. No. Description Part No. D1266 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 TRANSISTOR 2SC1815-GR(TE2 F T) QQS12SC1815F D1267 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 Q552 TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P DIODE SWITCHING HSS4148TE-E QDTZ0HSS4148 TRANSISTOR KTC3198-GR-AT/P or...
  • Page 72 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W F 8.2k Ω or CHIP RES. 1/10W J 3.9k Ω or R558 RRXAFR5H8201 R1043 RRXAJR5Z0392 CHIP RES.(1608) 1/10W F 8.2k Ω or RES CHIP 1608 1/10W J 3.9k Ω RRXAFR5Z8201 RRXA392YF002 RES CHIP 1608 1/10W F 8.20k Ω...
  • Page 73 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W F 10k Ω or R1118 RRXAFR5H1002 R1254 PCB JUMPER D0.6-P5.0 JW5.0T CHIP RES. 1/10W F 10k Ω or RRXAFR5Z1002 R1255 PCB JUMPER D0.6-P5.0 JW5.0T RES CHIP 1608 1/10W F 10.0k Ω CARBON RES.
  • Page 74 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 10k Ω or R1509 RRXAJR5Z0103 VARISTOR 10D 471K SVR NVQZVR10D471 RES CHIP 1608 1/10W J 10k Ω RRXA103YF002 SA503! SURGE ABSORBER 470V+-10PER or NVQZ10D471KB CHIP RES. 1/10W J 100k Ω or R1510 RRXAJR5Z0104 VARISTOR 10D 471K SVR...
  • Page 75 SUPPLEMENT SERVICE MANUAL This Service Manual shows only the differences between the LT7-M32BB(A93F1EP) model and the LH7-M32BB(A93F0FP) model. All other information is described in the service manual of the original LH7-M32BB(A93F0FP) model. For the LT7-M32BB(A93F1EP) model, the letter (A93F1EP) is printed on the Serial Number Label on the back of the unit.
  • Page 76 Different parts from the original model LH7-M32BB(A93F0FP) Ref. No. Description Part No. MECHANICAL PARTS STAND ASSEMBLY A93F1EZ 1ESA21199 DECORATION PLATE A93F1EP 1EM123554 REAR CABINET A93F1EP 1EM024046 POP LABEL A93F1EP ---------- ASSEMBLED SCREW ( D9 M3X6 ) A71F0UH 1EM424392B ELECTRICAL PARTS DIGITAL MAIN CBA UNIT A93F1MMA-003 POWER SUPPLY CBA...

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