Emerson LC195EM9 B Service Manual
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Emerson LC195EM9 B Service Manual

19″ color lcd television
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TM
EMERSON AND THE G-CLEF LOGO ARE REGISTERED TRADEMARKS
OF EMERSON RADIO CORP., PARSIPPANY, NEW JERSEY, U.S.A.
SERVICE MANUAL
19" COLOR LCD TELEVISION
LC195EM9 B
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  • Page 1 EMERSON AND THE G-CLEF LOGO ARE REGISTERED TRADEMARKS OF EMERSON RADIO CORP., PARSIPPANY, NEW JERSEY, U.S.A. SERVICE MANUAL 19″ COLOR LCD TELEVISION LC195EM9 B...

  • Page 2: Table Of Contents

    IMPORTANT SAFETY NOTICE Proper service and repair is important to the safe, reliable operation of all Funai Equipment. The service procedures recommended by Funai and described in this service manual are effective methods of performing service operations. Some of these service special tools should be used when and as recommended.

  • Page 3: Specifications

    SPECIFICATIONS < TUNER / NTSC > ANT. Input ---------------------- 75 Ω Unbal., F type Description Condition Unit Nominal Limit 1. AFT Pull-In Range ±2.3 ±2.1 TV.ch.4 dBµ 2. Syncronizing Sens. CA.ch.31 dBµ CA.ch.87 dBµ < TUNER / ATSC > Description Condition Unit Nominal...
  • Page 4 < AUDIO > All items are measured across 8 Ω load at speaker output terminal with L.P.F. / Video1 Input. Description Condition Unit Nominal Limit -6dB/10% THD: 1. Audio Output Power 1.0/1.0 0.8/0.8 Lch/Rch 2. Audio Distortion 500mW: Lch/Rch 1.5/1.5 3.0/3.0 -6dB: Lch 70 to 10 k...

  • 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 3. Design Alteration Warning - Do not alter or add 7. Product Safety Notice - Some electrical and to the mechanical or electrical design of this TV mechanical parts have special safety-related receiver. Design alterations and additions, characteristics which are often not evident from including, but not limited to circuit modifications visual inspection, nor can the protection they give and the addition of items such as auxiliary audio...
  • 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 for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards. 1.

  • 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: Top View Bottom View 1.
  • Page 10 3. The flat pack-IC on the CBA is affixed with glue, so With Soldering Iron: be careful not to break or damage the foil of each 1. Using desoldering braid, remove the solder from pin or the solder lands under the IC when all pins of the flat pack-IC.
  • Page 11 2. Installation 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 the foil of each pin of the flat pack-IC on the CBA flux which is applied to all pins of the flat pack-IC, so you can install a replacement flat pack-IC more you can remove it easily.
  • Page 12 Instructions for Handling Semi- conductors Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1 MΩ) that is properly grounded to remove any static electricity that may be charged on the body.

  • Page 13: 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 14 [4] Rear Cabinet (S-4) (S-4) (S-5) (S-4) (S-5) (S-4) (S-5) (S-1) (S-4) (S-3) [3] Fix Stand Holder (S-3) [2] Stand Neck (S-2) [1] Stand Cover Fig. D1 A8AN5DC...
  • Page 15 [15] Front Cabinet [13] LCD Module Assembly (S-8) [14] Speaker [6] Digital Main CBA Unit (S-12) (S-8) [14] Speaker (S-12) (S-7) (S-6) [5] Shield Box [7] Tuner Holder (S-10) [12] Function (S-9) [11] IR Sensor (S-11) (S-10) [10] Inverter CBA [8] Power Supply CBA (S-10) (S-11)
  • Page 16 TV Cable Wiring Diagram To LCD Module Assembly Inverter CBA Junction To LCD Module CN401 CL403 Assembly CN403B Digital Main CBA Unit CN403A CN4501 CN4502 CN402 CN3601 CN3701 CN3704 CN451 To Speaker Power Supply CBA CN102 CN301 CN303 CN302 CN309 Function CL102 CN306...

  • 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. [CH. o/p] 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 [POWER] button on the remote control unit.

  • Page 21: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram A8AN5BLS...
  • Page 22 Video Block Diagram A8AN5BLV...
  • Page 23 Audio-1 Block Diagram A8AN5BLA1...
  • Page 24 Audio-2 Block Diagram A8AN5BLA2...
  • Page 25 Digital Signal Process Block Diagram A8AN5BLD...
  • Page 26 Inverter Block Diagram A8AN5BLINV...
  • Page 27 Power Supply Block Diagram A8AN5BLP...

  • Page 28: 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 29 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE_A,_V FUSE. ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE_A,_V. 2.
  • Page 30 Power Supply 1/3 Schematic Diagram CAUTION ! NOTE: Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using CAUTION ! : For continued protection against risk of fire, If Main Fuse (F601) is blown , check to see that all components in the power supply hot GND as a common terminal.
  • Page 31 Power Supply 2/3 Schematic Diagram VOLTAGE CHART CN303 Pin No. Voltage A8AN5SCP2...
  • Page 32 Power Supply 3/3 Schematic Diagram VOLTAGE CHART CN302 Pin No. Voltage A8AN5SCP3...
  • Page 33 Inverter & Junction Schematic Diagram A8AN5SCINV...
  • Page 34 Function Schematic Diagram A8AN5SCF...
  • Page 35 IR Sensor Schematic Diagram A8AN5SCIR...
  • Page 36 Digital Main 1/4 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into four and shown as IC3301 (1/4) ~ IC3301 (4/4) in this Digital Main Schematic Diagram Section. A8AN5SCD1...
  • Page 37 Digital Main 2/4 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into four and shown as IC3301 (1/4) ~ IC3301 (4/4) in this Digital Main Schematic Diagram Section. 8-10 A8AN5SCD2...
  • Page 38 Digital Main 3/4 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into four and shown as IC3301 (1/4) ~ IC3301 (4/4) in this Digital Main Schematic Diagram Section. 8-11 A8AN5SCD3...
  • Page 39 Digital Main 4/4 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into four and shown as IC3301 (1/4) ~ IC3301 (4/4) in this Digital Main Schematic Diagram Section. A8AN5SCD4 8-12...
  • Page 40 Power Supply CBA Top View NOTE: CAUTION ! The voltage for parts in hot circuit is measured using Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. hot GND as a common terminal. CAUTION ! : For continued protection against risk of fire, If Main Fuse (F601) is blown , check to see that all components in the power supply replace only with same type 4 A, 125V fuse.
  • Page 41 Power Supply CBA Bottom View CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. NOTE: If Main Fuse (F601) is blown , check to see that all components in the power supply CAUTION ! : For continued protection against risk of fire, The voltage for parts in hot circuit is measured using replace only with same type 4 A, 125V fuse.
  • Page 42 Inverter CBA Top View BA8CN0F01021 8-15...
  • Page 43 Inverter CBA Bottom View BA8CN0F01021 8-16...
  • Page 44 Function CBA Top View Function CBA Bottom View 8-17 BA8AN0F01012-2...
  • Page 45 IR Sensor CBA Top View Junction CBA Top View Junction CBA Bottom View BA8CN0F01021 IR Sensor CBA Bottom View BA8AN0F01012-3 8-18...

  • Page 46: Waveforms

    WAVEFORMS WF1 ~ WF7 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) Pin 23 of CN302 Pin 16 of CN302 VIDEO 0.2V 20µs COMP-Pb 0.2V 20µs Pin 19 of CN302 Pin 17 of CN302 20µs...

  • Page 47: Wiring Diagram

    WIRING DIAGRAM 10-1 A8AN5WI...

  • Page 48: Exploded Views

    EXPLODED VIEWS Cabinet LCD1 Digital Main CBA Unit CL4502 CL4501 SP802 SP801 Function CBA Power Supply CBA IR Sensor CBA See Electrical Parts List Inverter CBA for parts with this mark. Junction CBA AC601 11-1 A8AN5CEX...
  • Page 49 Packing Some Ref. Numbers are not in sequence. Packing Tape Tape Packing Tape Packing Tape Packing Tape 11-2 A8AN5PEX...

  • Page 50: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a # have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don't degrade the safety of the product through improper servicing.

  • Page 51: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. C605 POLYESTER FILM CAP . (PB FREE) 0.001µF/ CA2A102DT018 100V J Before replacing any of these components, read C607# CAP CERAMIC 4700pF/250V/M/KX CA2E472MR101...
  • Page 52 Ref. No. Description Part No. Ref. No. Description Part No. C7715 CHIP CERAMIC CAP .(1608) B K 0.047µF/50V CHD1JK30B473 D648 IC SHUNT REGULATOR KIA431-AT/P NSZBA0TJY036 C7729 CHIP CERAMIC CAP . CH J 39pF/50V CHD1JJ3CH390 D649 ZENER DIODE MTZJT-7733B QDTB00MTZJ33 CHIP RES.(1608) 1/10W 0 Ω C7730 RRXAZR5Z0000 D650...
  • Page 53 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W F 4.7k Ω Q7201 CHIP TRANSISTOR KTC3875S-GR-RTK/P NQ14KTC3875S R632 RRXAFR5H4701 CARBON RES. 1/4W J 6.8k Ω Q7301 CHIP TRANSISTOR KTC3875S-GR-RTK/P NQ14KTC3875S R634 RCX4JATZ0682 CARBON RES. 1/4W J 270 Ω Q7302 CHIP TRANSISTOR KTC3875S-GR-RTK/P NQ14KTC3875S...
  • Page 54 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 100k Ω R7308 RRXAJR5Z0104 BC601 BEADS INDUCTOR FBR07HA121SB-00 LLBF00STU030 CARBON RES. 1/4W J 100k Ω R7309 RCX4JATZ0104 BC636 PCB JUMPER D0.6-P5.0 JW5.0T CHIP RES. 1/10W J 100k Ω R7311 RRXAJR5Z0104 BC701...
  • Page 55 Ref. No. Description Part No. Ref. No. Description Part No. D101 LED L-53HT NP4Z000L53HT D418 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 D102 LED GREEN 333GT/E(FNA) NPWZ33GTEFNA D419 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 RESISTORS D422 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 CARBON RES. 1/4W J 100 Ω D428 ZENER DIODE MTZJT-775.1B QDTB0MTZJ5R1...
  • Page 56 JUNCTION CBA Ref. No. Description Part No. JUNCTION CBA ---------- Consists of the following: CONNECTOR CN403A WIRE ASSEMBLY 12PIN WX1A8CN0-101 WX1A8CN0-101 MISCELLANEOUS CL403 242 SERIES CONNECTOR TUC-P12X-B1 WHT JCTUB12TG002 20080422 13-6 A8AN5EL...
  • Page 57 Misuse of any trademarks or any other content in this manual is strictly prohibited. Funai shall aggressively enforce its intellectual property rights to the fullest extent of the law. LC195EM9 B A8AN5UH 2008-04-28...

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