Emerson LC320EM9 Service Manual
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Emerson LC320EM9 Service Manual

32? color lcd television
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See also: Owner's Manual
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
LC320EM9

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Summary of Contents for Emerson LC320EM9

  • Page 1: Service Manual

    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 LC320EM9...

  • 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. Description Condition Unit Nominal Limit 1. Audio Output Max Power Lch/Rch 10.0/10.0 9.0/9.0 (ATSC 0dBfs) 2. Audio Distortion (NTSC) 500mW: Lch/Rch 0.5/0.5 2.0/2.0 -6dB: Lch 70 to 10 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 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-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 A8AF1DC...
  • Page 15 [7] Digital Main CBA Unit [6] Shield Box (S-10) (S-11) (S-9) (S-11) (S-10) (N-1) [5] Shield (T) (S-12) (S-7) (S-8) (S-7) (S-12) [8] Power Supply CBA (S-12) Fig. D2 A8AF1DC...
  • Page 16 (S-14) (S-15) (S-14) (S-16) (S-14) [12] Stand Holder [11] PCB Holder (L,R) (S-13) Desolder (S-14) [10] Junction-B CBA (S-13) [9] Inverter CBA (S-13) Fig. D3 A8AF1DC...
  • Page 17 [19] Front Cabinet [13] LCD Module Assembly [18] Speaker (S-20) [17] Speaker Holder (L,R) (S-20) [18] Speaker (S-20) [17] Speaker Holder (L,R) (S-20) Desolder [14] Junction-A (S-19) (S-18) [15] IR Sensor [16] Function (S-17) Fig. D4 A8AF1DC...
  • Page 18 TV Cable Wiring Diagram To LCD Module Assembly Digital Main CBA Unit To LCD CL1000B CN1000 CN4501 CN4502 Module Junction-B Assembly Inverter CBA CN3601 CN3701 CN3704 CN1050 Power Supply CN1100 CL1000A CN301 CN302 CN303 CN501 CN1150 CN1200 CN1901 CN601 AC CORD CN1250 CN802 CN801...

  • Page 19: 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 20: Vcom Adjustment

    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 21: 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 22: 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 23: Block Diagrams

    BLOCK DIAGRAMS System Control Block Diagram A8AF1BLS...
  • Page 24 Video Block Diagram A8AF1BLV...
  • Page 25 Audio-1 Block Diagram A8AF1BLA1...
  • Page 26 Audio-2 Block Diagram A8AF1BLA2...
  • Page 27 Digital Signal Process Block Diagram A8AF1BLD...
  • Page 28 Inverter Block Diagram A8AF1BLINV...
  • Page 29 Power Supply Block Diagram A8AF1BLP...

  • 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: 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 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 23.5 13.1 -6.9 A8AF1SCP1...
  • Page 33 Power Supply 2/3 Schematic Diagram VOLTAGE CHART CN303 Pin No. Voltage A8AF1SCP2...
  • Page 34 Power Supply 3/3 Schematic Diagram VOLTAGE CHART CN302 Pin No. Voltage A8AF1SCP3...
  • Page 35 Inverter & Junction-B 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, The voltage for parts in hot circuit is measured using If Main Fuse (F1901) is blown , check to see that all components in the power supply replace only with same type 4 A, 125V fuse.
  • Page 36 Function Schematic Diagram A8AF1SCF...
  • Page 37 IR Sensor & Junction-A Schematic Diagram A8AF1SCIR...
  • Page 38 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. A8AF1SCD1...
  • Page 39 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 A8AF1SCD2...
  • Page 40 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 A8AF1SCD3...
  • Page 41 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. A8AF1SCD4 8-12...
  • Page 42 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 43 Power Supply CBA Bottom 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 44 Inverter CBA Top View Because a hot chassis ground is present in the power CAUTION ! supply circuit, an isolation transformer must be used. Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. Also, in order to have the ability to increase the input CAUTION ! : For continued protection against risk of fire, If Main Fuse (F1901) is blown , check to see that all components in the power supply...
  • Page 45 Inverter CBA Bottom View Because a hot chassis ground is present in the power CAUTION ! supply circuit, an isolation transformer must be used. Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. Also, in order to have the ability to increase the input CAUTION ! : For continued protection against risk of fire, If Main Fuse (F1901) is blown , check to see that all components in the power supply...
  • Page 46 Function CBA Top View IR Sensor CBA Top View Function CBA Bottom View IR Sensor CBA Bottom View BA8AF0F01022-3 BA8AF0F01022-4 8-17...
  • Page 47 Junction-A CBA Junction-A CBA Top View Bottom View BA8AF0F01022-5 Junction-B CBA Junction-B CBA Top View Bottom View BA8AF0F01031 8-18...

  • Page 48: 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 CVBS 0.2V 20µs VIDEO-Pb 0.2V 20µs Pin 19 of CN302 Pin 17 of CN302 20µs...

  • Page 49: Wiring Diagram

    WIRING DIAGRAM 10-1 A8AF1WI...

  • Page 50: Exploded Views

    EXPLODED VIEWS Cabinet Digital Main CBA Unit CL4502 CL4501 CL802 SP802 CL801 SP801 Junction-A IR Sensor CBA Function CBA LCD1 Inverter CBA Junction-B CBA See Electrical Parts List for parts with this mark. Power Supply CBA AC1901 11-1 A8AF1CEX...
  • Page 51 Packing Some Ref. Numbers are not in sequence. Packing Tape Tape Packing Tape Tape Packing Tape 11-2 A8AF0PEX...

  • Page 52: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. OWNERS MANUAL A8AF1UH 1EMN22959 Before replacing any of these components, read REMOTE CONTROL NF027UD 170/ NF027UD ECNLC6.501/NF027 carefully the product safety notice in this service DRY BATTERY(SUNRISE) R6SSE/2S XB0M451MS002 manual.

  • Page 53: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. C601# ELECTROLYTIC CAPACITOR 270µF/200V CA2D271DYG05 Before replacing any of these components, read C602 CERAMIC CAP . HR 470pF/2KV CCD3DKA0R471 carefully the product safety notice in this service C603...
  • Page 54 Ref. No. Description Part No. Ref. No. Description Part No. C807 CHIP CERAMIC CAP .(1608) B K 0.47µF/16V CHD1CK30B474 C7710 CHIP CERAMIC CAP . F Z 0.47µF/16V CHD1CZ30F474 C808 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 C7714 CHIP CERAMIC CAP .(1608) CH J 100pF/50V CHD1JJ3CH101 C809 CHIP CERAMIC CAP .(1608) B K 0.47µF/16V...
  • Page 55 Ref. No. Description Part No. Ref. No. Description Part No. D642 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q638 NPN TRANSISTOR POWER 2SC4881F HFE QQWZ2SC4881F MAX320 D644 DIODE 1ZC43(Q) QDLZ001ZC43Q Q639 TRANSISTOR KTA1267-GR-AT/P NQS1KTA1267P D645 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q645 TRANSISTOR 2SD400(E) QQUE002SD400 D646 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133...
  • Page 56 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 180 Ω CHIP RES.(1608) 1/10W 0 Ω R613 RCX4JATZ0181 R719 RRXAZR5Z0000 METAL OXIDE FILM RES. 1W J 1 Ω CHIP RES. 1/10W J 33k Ω R620 RN011R0DP003 R720 RRXAJR5Z0333...
  • Page 57 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 100 Ω CARBON RES. 1/4W G 4.7k Ω R7716 RRXAJR5Z0101 R121 RCX4GATZ0472 CHIP RES. 1/10W J 75 Ω CARBON RES. 1/4W G 2.7k Ω R7723 RRXAJR5Z0750 R122 RCX4GATZ0272 CHIP RES.
  • Page 58 Ref. No. Description Part No. Ref. No. Description Part No. C1004 CHIP CERAMIC CAP .(1608) B K 0.01µF/50V CHD1JK30B103 C1267 CHIP CERAMIC CAP .(1608) B K 0.01µF/50V CHD1JK30B103 C1005 CHIP CERAMIC CAP .(1608) CH J 1000pF/50V CHD1JJ3CH102 C1500 CHIP CERAMIC CAP .(1608) F Z 0.22µF/50V CHD1JZ30F224 C1006 CHIP CERAMIC CAP .(1608) B K 0.047µF/50V...
  • Page 59 Ref. No. Description Part No. Ref. No. Description Part No. D1162 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q1002 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P D1163 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q1020 TRANSISTOR KTA1267-GR-AT/P NQS1KTA1267P D1164 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 Q1100 FET POWER MOS SMD NP22N055SLE-E1-AZ QF2ZNP22N055 D1165 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133...
  • Page 60 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W F 6.8k Ω CARBON RES. 1/4W J 47 Ω R1118 RRXAFR5H6801 R1930 RCX4JATZ0470 CHIP RES. 1/10W F 6.8k Ω CARBON RES. 1/4W J 47k Ω R1119 RRXAFR5H6801 R1931 RCX4JATZ0473 CHIP RES.
  • Page 61 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. LC320EM9 A8AF1UH 2008-02-21...

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