FUNAI LH7-M19BB Service Manual
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FUNAI LH7-M19BB Service Manual

19″ color lcd television
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SERVICE MANUAL
This Service Manual is for the
Serial No. Label
LH7-M19BB (A93N2EP) model.
For the LH7-M19BB (A93N2EP)
model, the letter (A93N2EP) is
printed on the Serial Number Label
"A93N2EP"
on the back of the unit. Refer to the
Serial Number Label on the right.
19" COLOR LCD TELEVISION
LH7-M19BB

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Summary of Contents for FUNAI LH7-M19BB

  • Page 1 SERVICE MANUAL This Service Manual is for the Serial No. Label LH7-M19BB (A93N2EP) model. For the LH7-M19BB (A93N2EP) model, the letter (A93N2EP) is printed on the Serial Number Label "A93N2EP" on the back of the unit. Refer to the Serial Number Label on the right.

  • Page 2: Table Of Contents

    19″ COLOR LCD TELEVISION LH7-M19BB 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 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 3.0/3.0 2.0/2.0 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 (S-2) (S-4) (S-2) (S-2) (S-4) [2] Rear Cabinet (S-2) (S-2) (S-3) [1] Stand Assembly (S-1) Fig. D1 A93N2DC...
  • Page 14 [12] Front Cabinet [6] Shield Box (S-10) [5] Jack Holder [10] Junction (S-7) (S-8) (S-10) [9] Speaker (H-1) Speaker Holder (S-9) (S-12) (S-13) [11] Function CBA (S-8) [7] Digital Main [9] Speaker (S-12) CBA Unit (S-5) Speaker Holder [3] Tuner Shield (S-6) [8] LCD Module Assembly...
  • Page 15 TV Cable Wiring Diagram To LCD Module Assembly To LCD Module Assembly Power Supply CBA CN3901 CN301 CN302 CN3701 CN1001 CN303 CN3703 CN3702 CN404 CN3401 CN1002 CN401 CN3704 Digital Main CN802 CBA Unit CN801 CORD CN152 To Speaker To Speaker CN101 Junction CBA CN101A...

  • Page 16: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS 1. Purity Check Mode General Note: “CBA” is abbreviation for “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 17 2. VCOM Adjustment. 4. Auto Calibration [PC] Purpose: To bring the color adjustment of PC into Test Point Adj. Point standard alignment. Screen Symptom of Misadjustment: If this adjustment is buttons incorrect, PC signals do not reproduce the M. EQ. Spec.
  • Page 18 The following adjustment normally are not attempted in 4. Enter the Service mode. Press [ -] button on the the field. Only when replacing the LCD Panel then adjust service remote control unit and select “C/D” mode. as a preparation. 5.

  • 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: 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. (IC605, Q601, Q602, D602, D604, D605, D607, T601, R602) Is the AL+33V line voltage normal?
  • Page 21 FLOW CHART NO.5 AL+3.3V is not output. Is approximately 7V voltage supplied to the collector Check D637, C628 and their periphery circuit, and of Q605? service it if defective. Is approximately 4V voltage supplied to the base Check D634 and their periphery circuit, and of Q605? service it if defective.
  • Page 22 FLOW CHART NO.9 PANEL+24V is not output. Is approximately 33V voltage supplied to the cathode of D619? Is approximately 33V voltage outputted to the collector of Q612? Check D617, D636 and their periphery circuit, and service it if defective. FLOW CHART NO.10 PANEL+13V is not output.
  • Page 23 FLOW CHART NO.12 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.13 P-ON+3.3V is not output. Replace Q606. FLOW CHART NO.14 P-ON+11V is not output. Is approximately 12V voltage supplied to the base of Q609? Replace Q609.
  • Page 24 FLOW CHART NO.16 No operation is possible from the remote control unit. Check AL+3.3V line and service it if defective. Replace the RS101 (remote control receiver) or remote control unit. Check the line between Pin(1) of RS101 (remote control receiver) and Pin(13) of CN303, and service it if defective.
  • Page 25 FLOW CHART NO.18 Picture does not appear normally. Check the line between Pin(16, 18) of CN303 and Are the DIF signals outputted to Pin(16, 18) of CN303? Pin(4, 5) of TU10, and TU10(Tuner Unit), and service it if defective. Replace Digital Main CBA Unit or LCD Module Assembly.

  • Page 26: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram A93N2BLS...
  • Page 27 Video Block Diagram A93N2BLV...
  • Page 28 Audio Block Diagram A93N2BLA1...
  • Page 29 Digital Signal Process Block Diagram A93N2BLD...
  • Page 30 Inverter Block Diagram A93N2BLINV...
  • Page 31 Power Supply Block Diagram A93N2BLP...

  • Page 32: 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 33 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 34 Main 1/4 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 35 Main 2/4 Schematic Diagram A93N2SCM2...
  • Page 36 Main 3/4 Schematic Diagram A93N2SCM3...
  • Page 37 Main 4/4 Schematic Diagram A93N2SCM4...
  • Page 38 Function & Junction Schematic Diagram A93N2SCF...
  • Page 39 Digital Main 1/7 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. A93N2SCD1...
  • Page 40 Digital Main 2/7 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. A93N2SCD2...
  • Page 41 Digital Main 3/7 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. 9-10 A93N2SCD3...
  • Page 42 Digital Main 4/7 Schematic Diagram 9-11 A93N2SCD4...
  • Page 43 Digital Main 5/7 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. 9-12 A93N2SCD5...
  • Page 44 Digital Main 6/7 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. 9-13 A93N2SCD6...
  • Page 45 Digital Main 7/7 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. 9-14 A93N2SCD7...
  • Page 46 Main CBA Top View Because a hot chassis ground is present in the power CAUTION ! NOTE: supply circut, an isolation transformer must be used. Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input If Main Fuse (F601) is blown , check to see that all components in the power supply hot GND as a common terminal.
  • Page 47 Main CBA Bottom View Because a hot chassis ground is present in the power CAUTION ! NOTE: supply circut, an isolation transformer must be used. Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input If Main Fuse (F601) is blown , check to see that all components in the power supply hot GND as a common terminal.
  • Page 48 Function CBA Top View Junction CBA Junction CBA Top View Bottom View BA93N2F01012 Function CBA Bottom View BA93N2F01012B 9-17...

  • 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 2 of CN404 Pin 4 of CN404 20µs VIDEO-Y 0.2V 20µs VIDEO 0.2V 20µs Pin 27 of CN401 Pin 6 of CN404...
  • 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 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 51: Wiring Diagram

    WIRING DIAGRAMS A93N2WI 11-1...

  • Page 52: Exploded View

    EXPLODED VIEWS Cabinet Digital Main CBA Unit CL302 X3301 CL303 CL404 CL3901 CL301 Junction CBA SP802 CL401 CL802 SP801 Function CBA CL801 LCD1 Main CBA See Electrical Parts List for parts with this mark. AC601 Stand Assembly 12-1 A93N2CEX...
  • Page 53 Packing X2-1 X2-2 X2-3 Stand Tape Assembly Packing Tape Tape Packing Tape Packing Tape Some Ref. Numbers are not in sequence. Packing Tape 12-2 A93N2PEX...

  • 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 A93N2EP ---------- carefully the product safety notice in this service SCREW P-TIGHT 3X10 BIND HEAD+ GBHP3100 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. C404 CHIP CERAMIC CAP .(1608) B K 1µF/10V CHD1AK30B105 Before replacing any of these components, read C405 CHIP CERAMIC CAP .(1608) CH J 33pF/50V CHD1JJ3CH330 carefully the product safety notice in this service CHIP RES.(1608) 1/10W 0 Ω...
  • Page 56 Ref. No. Description Part No. Ref. No. Description Part No. CAP POLYESTER FILM 0.0027µF/100V J CA2A272SER02 C1024 CHIP CERAMIC CAP .(1608) B K 0.01µF/50V CHD1JK30B103 C622 ELECTROLYTIC CAP . 2.2µF/50V M CE1JMASDL2R2 C1025 CHIP CERAMIC CAP .(1608) B K 0.01µF/50V CHD1JK30B103 C623 ELECTROLYTIC CAP .
  • Page 57 Ref. No. Description Part No. Ref. No. Description Part No. D408 DIODE ZENER 5V6BSB-T26 NDTB5R6BST26 DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D409 WIRE CP STP-S-0.50 or XZ40F0REN001 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F WIRE CP STP-S-0.60 or XZ40F0REN002 D627 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 WIRE CP 6113-05603-0220 or XZ40F0SHG001...
  • Page 58 Ref. No. Description Part No. Ref. No. Description Part No. D801 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D1025 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 D802 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133...
  • Page 59 Ref. No. Description Part No. Ref. No. Description Part No. TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P Q607 TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F NPN TRANSISTOR 2SC5343G-AT or NQSG02SC5343...
  • Page 60 Ref. No. Description Part No. Ref. No. Description Part No. TRANSISTOR 2SA1015-GR(TE2 F T) or QQS12SA1015F Q1008 TRANSISTOR KTC3198-Y-AT/P or NQSYKTC3198P PNP TRANSISTOR 2SA1980Y-AT or NQSY02SA1980 TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P PNP TRANSISTOR 2SA1980 G or NQSG02SA1980 TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P PNP TRANSISTOR 2SA1980M Y or NQSY2SA1980M TRANSISTOR 2SC1815-Y(TE2 F T) or...
  • Page 61 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 0 Ω NPN TRANSISTOR 2SC5343MG-AT or NQSG2SC5343M RRXA000YF002 CHIP RES.(1608) 1/10W 0 Ω or NPN TRANSISTOR 2SC5343M Y NQSY2SC5343M RRXAZR5Z0000 RES CHIP 1608 1/10W J 0 Ω Q1017 TRANSISTOR KTC3198-Y-AT/P or NQSYKTC3198P...
  • Page 62 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 1.2k Ω WIRE CP 6113-05603-0220 or XZ40F0SHG001 RRXA122YF002 CHIP RES. 1/10W J 1.2k Ω or WIRE CP CP0.56 XZ40F0XRC001 R468 RRXAJR5Z0122 RES CHIP 1608 1/10W J 1.2k Ω R429 WIRE CP STP-S-0.50 or XZ40F0REN001...
  • Page 63 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM T 1/4W J 1.8k Ω or RES CARBON FILM 1/4W J 2.7k Ω R620 RCX4182T1001 RCX4272FS002 RES CARBON FILM 1/4W J 1.8k Ω RES CARBON FILM T 1/4W J 1.8k Ω or RCX4182FS002 R660 RCX4182T1001...
  • Page 64 Ref. No. Description Part No. Ref. No. Description Part No. RES CHIP 1608 1/10W J 43k Ω RES CARBON FILM 1/4W J 12k Ω RRXA433YF002 RCX4123FS002 METAL OXIDE FILM RES. 2W J 1 Ω RES CARBON FILM T 1/4W J 27k Ω or R697 RN021R0ZU001 R1014...
  • Page 65 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM 1/4W J 12k Ω RES CHIP 1608 1/10W F 12.0k Ω RCX4123FS002 RTW1202YF002 CHIP RES. 1/10W F 100k Ω or CHIP RES. 1/10W F 47.0 k Ω or R1052 RRXAFR5H1003 R1090...
  • Page 66 Ref. No. Description Part No. Ref. No. Description Part No. JK403 JACK RCA PCB S YELLOW 01/RCA-101H(YL) JXRJ010YUQ05 TRANSISTOR 2SA1015-GR(TE2 F T) or QQS12SA1015F PNP TRANSISTOR 2SA1980Y-AT or NQSY02SA1980 JACK RCA PCB S (YELLOW) 01 MTJ-032-04B- JXRJ010LY032 PNP TRANSISTOR 2SA1980 G or NQSG02SA1980 40 FE PNP TRANSISTOR 2SA1980M Y or...
  • Page 67 Ref. No. Description Part No. MISCELLANEOUS TU10 TUNER UNIT DT0S40AML201A UTNPSG0SM001 20090708 14-13 A93N2EL...
  • Page 68 LH7-M19BB A93N2EP 2009-07-23...

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