Emerson LC320EM8 Service Manual
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Emerson LC320EM8 Service Manual

32″ 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
32" COLOR LCD TELEVISION
LC320EM8

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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 32″ COLOR LCD TELEVISION LC320EM8...

  • 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 > ANT. Input ---------------------- 75 ohm Unbal., F type Reference Level--------------- 20 Vp-p (LCD Green Cathode) Test Input Signal -------------- 400 Hz 30% modulation Description Condition Unit Nominal Limit Picture 45.75 1. Intermediate Freq. Sound 41.25 CH-2 dBµV 2.

  • Page 4: 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 5 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 6 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 7 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 8: 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 9 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 10 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 11 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 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-4) (S-4) (S-6) [5] Function CBA (S-5) (S-4) [4] Rear Cabinet (S-1A) (S-4) (S-1B) (S-1B) (S-4) [3] Stand Cover [2] Stand Hinge [1] Stand Base Plate (S-2) (S-3) (S-2) (S-3) (S-2) Fig. D1 L4406DC...
  • Page 14 [8] Jack Holder(A) [6] Chassis Bracket (S-7) (S-9) (S-7) (S-10) [9] Shield Box (S-7) (S-10) (S-7) (N-1) [7] Jack Holder(D) (S-8) Fig. D2 L4406DC...
  • Page 15 (S-13) [12] Inverter CBA (S-14) (S-11) (S-15) [13] PCB Holder (S-15) (S-12) [11] Digital Main CBA Unit [10] Main CBA Fig. D3 L4406DC...
  • Page 16 [14] Panel Holder [20] Front Cabinet (S-17) (S-16) [18] Speaker (R) (S-17) (S-17) (S-17) (S-16) (S-18) (S-20) (S-16) (S-18) (S-19) [15] T-CON CBA [17] LED CBA (S-16) (S-21) [19] Speaker (L) (S-17) (S-17) [16] LCD Module Assembly (S-17) (S-16) (S-17) [14] Panel Holder (S-17) (S-16)
  • Page 17 TV Cable Wiring Diagram To LCD Module Assembly To LCD Module Assembly Inverter CBA CN1050 CN1150 CN1250 CN214 CN1100 CN211 CN1200 CN1300 CN213 CN212 Function CBA CN111 CN101 T-CON CBA CN1000 Main CBA Digital Main CBA Unit CN1121 CN253 CN1505 CN111 CN1111 CN1112...

  • Page 18: 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 19 1. Purity Check Mode The following adjustment normally are not attempted in the field. Only when replacing the This mode cycles through full-screen displays of red, LCD Panel then adjust as a preparation. green, blue, and white to check for non-active pixels. 2.
  • Page 20 3. Auto Calibration 4. Flicker Adjustment Purpose: To bring the color adjustment of each *This adjustment is required when reparing T-CON component into standard alignment. CBA. 1. Enter the Service mode. (See page 5-1.) Symptom of Misadjustment: If this adjustment is incorrect, component signals do not reproduce the 2.

  • Page 21: How To Initialize The Lcd Television

    HOW TO INITIALIZE THE LCD TELEVISION How to initialize the LCD television: 1. To turn the power on, press [POWER] button on the normal remote control unit or the unit. 2. Use the service remote control unit. (Refer to “ELECTRICAL ADJUSTMENT INSTRUCTIONS” section.

  • Page 22: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram L4406BLS...
  • Page 23 Video Block Diagram L4406BLV...
  • Page 24 Digital Signal Process Block Diagram L4406BLD...
  • Page 25 Audio Block Diagram L4406BLA...
  • Page 26 Inverter Block Diagram L4406BLIV...
  • Page 27 Power Supply Block Diagram L4406BLP...

  • 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 Main 1/5 Schematic Diagram VOLTAGE CHART CN112 Pin No. Voltage CN114 Pin No. Voltage L4406SCM1...
  • Page 31 Main 2/5 Schematic Diagram VOLTAGE CHART CN113 Pin No. Voltage L4406SCM2...
  • Page 32 Main 3/5 Schematic Diagram VOLTAGE CHART CN111 Pin No. Voltage 32.7 L4406SCM3...
  • Page 33 Main 4/5 Schematic Diagram L4406SCM4...
  • Page 34 Main 5/5 Schematic Diagram CAUTION ! NOTE: Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. CAUTION ! : For continued protection against risk of fire, If Main Fuse (F601) is blown , check to see that all components in the power supply The voltage for parts in hot circuit is measured using replace only with same type 4 A, 125V fuse.
  • Page 35 Function Schematic Diagram VOLTAGE CHART CN101 Pin No. Voltage L4406SCF...
  • Page 36 LED Schematic Diagram L4406SCL...
  • Page 37 Inverter Schematic Diagram 8-10 L4406SCINV...
  • Page 38 Digital Main 1/8 Schematic Diagram L4406SCD1 8-11...
  • Page 39 Digital Main 2/8 Schematic Diagram L4406SCD2 8-12...
  • Page 40 Digital Main 3/8 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC1504. IC1504 is divided into four and shown as IC1504 (1/4) ~ IC1504 (4/4) in this Digital Main Schematic Diagram Section. L4406SCD3 8-13...
  • Page 41 Digital Main 4/8 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC1504. IC1504 is divided into four and shown as IC1504 (1/4) ~ IC1504 (4/4) in this Digital Main Schematic Diagram Section. L4406SCD4 8-14...
  • Page 42 Digital Main 5/8 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC1504. IC1504 is divided into four and shown as IC1504 (1/4) ~ IC1504 (4/4) in this Digital Main Schematic Diagram Section. 8-15 L4406SCD5...
  • Page 43 Digital Main 6/8 Schematic Diagram L4406SCD6 8-16...
  • Page 44 Digital Main 7/8 Schematic Diagram 1 NOTE: The order of pins shown in this diagram is different from that of actual IC1504. IC1504 is divided into four and shown as IC1504 (1/4) ~ IC1504 (4/4) in this Digital Main Schematic Diagram Section. 8-17 L4406SCD7...
  • Page 45 Digital Main 8/8 Schematic Diagram 8-18 L4406SCD8...
  • Page 46 Main CBA Top View CAUTION ! Because a hot chassis ground is present in the power Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. supply circuit, an isolation transformer must be used. CAUTION ! : For continued protection against risk of fire, If Main Fuse (F601) is blown , check to see that all components in the power supply Also, in order to have the ability to increase the input...
  • Page 47 Main CBA Bottom View CAUTION ! Because a hot chassis ground is present in the power Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. supply circuit, an isolation transformer must be used. CAUTION ! : For continued protection against risk of fire, If Main Fuse (F601) is blown , check to see that all components in the power supply Also, in order to have the ability to increase the input...
  • Page 48 Function CBA Top View Function CBA Bottom View BL4300F01012-2 8-21...
  • Page 49 LED CBA Top View LED CBA Bottom View BL4300F01012-3 8-22...
  • Page 50 Inverter CBA Top View BL4400F01022 8-23...
  • Page 51 Inverter CBA Bottom View 8-24 BL4400F01022...

  • Page 52: 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 2 of CN113 Pin 13 of CN114 CVBS 0.2V 20µs VIDEO-Pb 0.2V 20µs Pin 21 of CN114 Pin 14 of CN114 20µs...

  • Page 53: Wiring Diagram

    WIRING DIAGRAM 10-1 L4406WI...

  • Page 54: Exploded Views

    EXPLODED VIEWS Cabinet Function CBA Inverter CBA SP802 CLN804 T-CON CBA Main CBA LED CBA CLN253 CLN803 LCD Module Assembly AC601 SP801 Digital Main CBA Unit See Electrical Parts List for parts with this mark. 11-1 L4406CEX...
  • Page 55 Packing Packing Tape Some Ref. Numbers are not in sequence. Packing Tape Packing Tape Tape Packing Tape Packing Tape Packing Tape 11-2 L4406PEX...

  • Page 56: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. RFID LABEL P7100UM ---------- Before replacing any of these components, read STAND SHEET L4300UA 1EM423161 carefully the product safety notice in this service ACCESSORIES manual.

  • Page 57: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. C451 CHIP CERAMIC CAP .(1608) F Z 0.1µF/50V CHD1JZ30F104 Before replacing any of these components, read C452 ELECTROLYTIC CAP . 100µF/10V M CA1A101SP085 carefully the product safety notice in this service C453...
  • Page 58 Ref. No. Description Part No. Ref. No. Description Part No. C606# ALUMINUM ELECTROLYTIC CAP 470µF/200V CA2D471NC190 C810 ELECTROLYTIC CAP . 10µF/50V M CA1J100SP085 C811 ELECTROLYTIC CAP . 100µF/10V M CA1A101SP085 C609 CERAMIC CAP . R K 1000pF/2KV CCD3DKA0R102 C813 ELECTROLYTIC CAP 1µF/50V M CA1J1R0SP085 C610 FILM CAP .(P) 0.033µF/50V J...
  • Page 59 Ref. No. Description Part No. Ref. No. Description Part No. D607# ZENER DIODE MTZJT-7727B QDTB00MTZJ27 Q537 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P D608 ZENER DIODE MTZJT-777.5B QDTB0MTZJ7R5 Q601# FET MOS 2SK3797(Q) QFQZ2SK3797Q D609 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q602# TRANSISTOR 2SC2120-O(TE2 F T) QQS02SC2120F D610 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133...
  • Page 60 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 10k Ω CARBON RES. 1/4W J 10k Ω R460 RRXAJR5Z0103 R545 RCX4JATZ0103 CHIP RES. 1/10W J 100k Ω CHIP RES. 1/10W J 1k Ω R461 RRXAJR5Z0104 R546 RRXAJR5Z0102 CHIP RES.
  • Page 61 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 33k Ω CHIP RES.(1608) 1/10W 0 Ω R704 RRXAJR5Z0333 R780 RRXAJR5Z0000 CHIP RES. 1/10W J 39k Ω CHIP RES. 1/10W J 33k Ω R705 RRXAJR5Z0393 R783 RRXAJR5Z0333 CHIP RES.
  • Page 62 Ref. No. Description Part No. Ref. No. Description Part No. JK704 5PIN JACK MSP-226V40-03 NI FE JYRL050LY033 DIODES JS803 PCB JUMPER D0.6-P5.0 JW5.0T D151 LED 333GT/E NPHZ00333GTE SCREW B-TIGHT D3X8 BIND HEAD+ GBJB3080 D152 LED L-53HT NP4Z000L53HT SA601# SURGE ABSORBER 470V+-10PER NVQZ10D471KB RESISTORS T601#...
  • Page 63 Ref. No. Description Part No. Ref. No. Description Part No. C1116 CHIP CERAMIC CAP . B K 2200pF/50V CHD1JKB0B222 D1060 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 C1117 CHIP CERAMIC CAP . B K 0.01µF/50V CHD1JKB0B103 D1061 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 C1161 CERAMIC CAP . SL D 10pF/3KV CCD3FDASL100 D1062 SWITCHING DIODE 1SS133(T-77)
  • Page 64 Ref. No. Description Part No. Ref. No. Description Part No. R1105 PCB JUMPER D0.6-P5.0 JW5.0T CHIP RES. 1/10W J 100k Ω R1110 RRXAJR5Z0104 IC1000 IC PWM CONTROLLER OZ9938GN-B-0-T2 NSZBA0TTMC03 CHIP RES. 1/10W J 20k Ω R1111 RRXAJR5Z0203 IC1001 IC MOSFET DRIVER OZ9982GN NSZBA0TTMC02 CHIP RES.
  • Page 65 Ref. No. Description Part No. CHIP RES. 1/10W J 10k Ω R1506 RRXAJR5Z0103 CHIP RES. 1/10W J 10k Ω R1507 RRXAJR5Z0103 CHIP RES. 1/10W J 10k Ω R1508 RRXAJR5Z0103 CHIP RES. 1/10W J 10k Ω R1509 RRXAJR5Z0103 CHIP RES. 1/10W J 10k Ω R1510 RRXAJR5Z0103 CHIP RES.
  • Page 66 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. LC320EM8 L4406UG 2007-03-15...

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