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Emerson LD200EM8 Service Manual

20″ lcd tv/dvd
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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
20" LCD TV/DVD
LD200EM8

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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 20″ LCD TV/DVD LD200EM8...
  • Page 2 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: Table Of Contents

    TABLE OF CONTENTS Specifications ................1-1 Laser Beam Safety Precautions .

  • Page 4: Specifications

    SPECIFICATIONS < LCD TV Section > < TUNER > VHF/UHF Input : 75 ohm Unbal., F type Intermediate Freq. : Picture 45.75 MHz, Sound 41.25 MHz Description Condition Unit Nominal Limit 1. Video S/N 80dB >43 2. Audio S/N 80dB >45 <...
  • Page 5 < ATSC > Description Condition Unit Nominal Limit 1. RECEIVED FREQ. RANGE >100 (-28dBm) – VHF LOW BAND. CH.4 2. ATSC DYNAMIC RANGE VHF HI BAND. CH.10 -76/0 (min./max.) UHF BAND. CH.41 VHF LOW BAND. CH.4 3. ATSC SUSCEPTIBILITY TO VHF HI BAND.
  • Page 6 <DVD Section> < DVD > Description Condition Unit Nominal Limit 1. Horizontal Resolution (TDV-540 TIT.2 CHP.16) Line 2. Video S/N at CN3400 (TDV-540 TIT.2 CHP.6) 3. S/N Chroma (TDV-540 TIT.2 CHP.17) 4. Audio Distortion (LPCM 48 kHz, W/LPF) 0.03 0.07 (PTD 1-NOR TIT.1 CHP.1) L, 20 Hz 5.

  • Page 7: Laser Beam Safety Precautions

    LASER BEAM SAFETY PRECAUTIONS This DVD player uses a pickup that emits a laser beam. Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin. The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 30 cm away from the pickup lens when the diode is turned on.

  • Page 8: 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 9 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 10 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 11 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 12: Standard Notes For Servicing

    STANDARD NOTES FOR SERVICING Circuit Board Indications Pb (Lead) Free Solder 1. The output pin of the 3 pin Regulator ICs is Pb free mark will be found on PCBs which use Pb indicated as shown. free solder. (Refer to figure.) For PCBs with Pb free mark, be sure to use Pb free solder.
  • Page 13 around the flat pack-IC to protect other parts from With Soldering Iron: damage. (Fig. S-1-2) 1. Using desoldering braid, remove the solder from 3. The flat pack-IC on the CBA is affixed with glue, so all pins of the flat pack-IC. When you use solder be careful not to break or damage the foil of each flux which is applied to all pins of the flat pack-IC, pin or the solder lands under the IC when...
  • Page 14 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 15 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 16: Cabinet Disassembly Instructions

    CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart Removal Step/ This flowchart indicates the disassembly steps for the Remove/*Unhook/ 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 17 Reference Notes Note: (1) Order of steps in procedure. When reassembling, 1. CAUTION 1: Electrostatic breakdown of the laser follow the steps in reverse order. These numbers diode in the optical system block may occur as a are also used as the Identification (location) No. of potential difference caused by electrostatic charge parts in figures.
  • Page 18 [3] Rear Cabinet (S-4) (S-3) (S-3) (S-3) (S-3) (S-1) (S-3) [2] Stand Cover [1] Arm Assembly (S-2) Fig. D1 (S-2) A7440DC...
  • Page 19 [6] DVD Holder(Top) [5] DVD Mechanism (S-7) (S-6) (S-8) [7] DVD Holder (Bottom) (S-6) (S-5) [4] DVD Main CBA Unit Remove two screws A, then short the three short lands by soldering as shown in View for A. Chassis Cover Screws A Pin A Either of two places...
  • Page 20 [10] Main CBA (S-10) [8] Jack Holder (S-10) (S-10) (S-9) Module PCB Holder [9] DTV Module CBA Unit (S-10) Fig. D3 (S-10) A7440DC...
  • Page 21 (S-12) (S-12) (S-12) (S-12) (S-11) (S-12) [11] Tilt Stand Holder [12] LCD Module Fig. D4 A7440DC...
  • Page 22 [18] Front Cabinet (S-13) [16] Junction-B (S-13) [13] Function Speaker Holder (S-13) (S-15) Desolder [17] Speaker Speaker Holder Washer (S-14) [14] IR Sensor Desolder [17] Speaker (S-15) Speaker Holder [15] Junction-A Fig. D5 A7440DC...
  • Page 23 TV Cable Wiring Diagram To DVD Mechanism DVD Main CBA Unit CN201 CN301 CN801 Function CBA CN601 CL1107 To LCD Module CN401 Main CBA CN1202 CN1201 CN1301 CN401 CN1701 CN402 CN1651 Module CN403 Junction-A CN62 CN61 CL801 CN801 CN1302 CN802 Speaker CL802 Junction-B...

  • Page 24: 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 25 The following adjustment normally are not Button Data attempted in the field. Only when replacing the Item (on the service Value LCD Panel then adjust as a preparation. remote control) 2. Flicker Adjustment D2-BRT D2-CNT 1. Enter the Service mode. 2.
  • Page 26 3. White Balance Adjustment adjustment. Press [1] button to select “COR(C/ D1)” for Red adjustment. When “x” value and “y” Purpose: To mix red, green and blue beams correctly value are not within specification, adjust “COB (C/ for pure white. D1)”...
  • Page 27 3. Make sure that contrast and brightness controls are set to initial position. 4. Confirm “C” position was beginning to bright. 5. If “C” position was beginning to bright, no need to adjust. 6. If “C” position is not available or to be highly brightness, then adjust IIC-BUS dada.

  • Page 28: How To Initialize The Lcd Tv/Dvd

    HOW TO INITIALIZE THE LCD TV/DVD To put the program back at the factory-default, initialize the LCD TV/DVD as the following procedure. < DVD Section > < LCD TV Section > 1. Press [1], [2], [3], [4], and [DISPLAY] buttons on the 1.

  • Page 29: Firmware Renewal Mode

    FIRMWARE RENEWAL MODE 1. Turn the power on and press [EJECT] button on the 5. After programming is finished, the disc will be remote control unit to put the LCD TV/DVD into ejected automatically. Fig. e appears on the screen DVD mode.

  • Page 30: Block Diagrams

    BLOCK DIAGRAMS < LCD TV SECTION > System Control Block Diagram A7441BLS...
  • Page 31 IF/Video Block Diagram A7441BLIF...
  • Page 32 Audio Block Diagram A7441BLA...
  • Page 33 DTV Module Block Diagram A7441BLDTV...
  • Page 34 LCD Block Diagram A7441BLLCD...
  • Page 35 Power Supply Block Diagram A7441BLP...
  • Page 36 LCD Backlight Block Diagram A7441BLLB...
  • Page 37 BLOCK DIAGRAMS < DVD SECTION > System Control / Servo Block Diagram A7441BLSD...
  • Page 38 Digital Signal Process Block Diagram A7441BLD...

  • Page 39: 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 40 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 41 Main 1/6 Schematic Diagram < LCD TV Section > VOLTAGE CHART CN1201 Pin No. Voltage CN1202 Pin No. Voltage 24.4 24.4 10.8 -6.2 10-3 A7441SCM1...
  • Page 42 Main 2/6 Schematic Diagram < LCD TV Section > VOLTAGE CHART CN61 Pin No. Voltage CN62 Pin No. Voltage 10-4 A7441SCM2...
  • Page 43 Main 3/6, Junction-A & Junction-B Schematic Diagram < LCD TV Section > A7441SCM3 10-5...
  • Page 44 Main 4/6 Schematic Diagram < LCD TV Section > 10-6 A7441SCM4...
  • Page 45 Main 5/6 Schematic Diagram < LCD TV Section > CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. NOTE: 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 46 Main 6/6 Schematic Diagram < LCD TV Section > 10-8 A7441SCM6...
  • Page 47 Function Schematic Diagram < LCD TV Section > A7441SCF 10-9...
  • Page 48 IR Sensor Schematic Diagram < LCD TV Section > A7441SCIR 10-10...
  • Page 49 DTV Module 1/2 Schematic Diagram < LCD TV Section > 10-11 A7441SCDT1...
  • Page 50 DTV Module 2/2 Schematic Diagram < LCD TV Section > 10-12 A7441SCDT2...
  • Page 51 DVD Main 1/3 Schematic Diagram < DVD Section > 1 NOTE: Either IC461 or IC462 is used for DVD MAIN CBA UNIT. A7441SCD1 10-13...
  • Page 52 DVD Main 2/3 Schematic Diagram < DVD Section > A7441SCD2 10-14...
  • Page 53 DVD Main 3/3 Schematic Diagram < DVD Section > A7441SCD3 10-15...
  • Page 54 Main 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. CAUTION ! : For continued protection against risk of fire, 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...
  • Page 55 Main 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. CAUTION ! : For continued protection against risk of fire, 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...
  • Page 56 Function CBA Top View IR Sensor CBA IR Sensor CBA Top View Bottom View BA7420F01021-2 Junction-A CBA Top & Bottom View Function CBA Bottom View BA7420F01021-3 Junction-B CBA Top & Bottom View BA7420F01021-1 BA7420F01021-4 10-18...

  • Page 57: Waveforms

    WAVEFORMS < LCD TV SECTION > WF1 ~ WF7 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) Pin 71 of IC1202 Pin 56 of IC1202 CVBS 0.2V 20µs VIDEO-Pb...
  • Page 58 WAVEFORMS < DVD SECTION > WF8 ~ WF12 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) DVD Video (Power on (Stop) MODE) Pin 1 of CN1701 Pin 7 of CN1701 WF11 DVD-AUDIO(R)

  • Page 59: Wiring Diagram

    WIRING DIAGRAM < LCD TV SECTION > 12-1 A7441WI...
  • Page 60 WIRING DIAGRAM < DVD SECTION > DVD-ON+5V 20 CD/DVD 19 D 18 A 17 DVD-Y C 16 B 15 DVD-C NU 14 VREF 13 DVD-AUDIO(L) NU 12 DVD-MUTE GND 11 DVD-AUDIO(R) CD-LD 10 GND(LD) 9 DVD-SPDIF DVD-LD 8 PD-MONI 7 GND(DVD-PD) 6 GND(CD-PD) 5 TS(-) 4...

  • Page 61: System Control Timing Charts

    SYSTEM CONTROL TIMING CHARTS Disc In ~ Play/Play ~ Disc Out Disc Disc Disc Disc Play Rotation Stop 3.3V Disc IN (TL221) 1.65V Sled Drive (TP303) 1.65V Disc Drive (TP301) 1.65V Focus Drive (TP304) Tracking Drive 1.65V (TP302) 13-1 A7420TI...

  • Page 62: Ic Pin Function Descriptions

    IC PIN FUNCTION DESCRIPTIONS IC1202 (LCD Drive / LCD Signal Signal Name Function Process / TV Micro Controller) Crystal Oscillation Output 38 XOUT (27MHz) Signal Name Function 39 VSS VDD+3.3V +3.3V VDD 40 VSS VDD+3.3V +3.3V VDD 41 VSS KEY-IN-1 Key Input 1 42 VDD+3.3V +3.3V VDD...
  • Page 63 Signal Name Function Signal Name Function Component Video Y Signal 116 ER[1] Pixel Data Output (ER) 75 VIDEO-Y Input 117 ER[0] Pixel Data Output (ER) S-VIDEO-Y 118 VSS Luminance Signal Input /DVD-Y 119 VSS 77 AVDDA +3.3V VDD 120 VSS 78 VSS 121 VSS 79 VDD+3.3V...
  • Page 64 Signal Name Function 159 VSS 160 VSS 14-3 A7440PIN...

  • Page 65: Lead Identifications

    LEAD IDENTIFICATIONS KIA7805API/P KTA1267-GR-AT/P 2SA950-Y(TE2 F T) 2SC2120-Y(TE2 F T) KTA1281Y-AT/P KTC3199-GR-AT/P 1: IN 2: GND 3: OUT 1 2 3 E C B E C B 2SK3563(Q) LD1117V TC4053BF(EL N F) TC4052BF(ELNF) AN5832SA-E1V 1: Vin 2: Vo 3: GND 1 2 3 G D S AN17812A...

  • Page 66: Exploded Views

    EXPLODED VIEWS Cabinet Junction-B CBA SP802 Function CBA IR Sensor CBA SP801 CL1401 Junction-A CBA CL1402 LCD-1 See Electrical Parts List for parts with this mark. Main CBA CL1651 L3-10 DTV Module CBA Unit DVD Main CBA Unit CL1701 AC601 16-1 A7441CEX...
  • Page 67 Packing Some Ref. Numbers are not in sequence. Packing Tape Tape Packing Tape Packing Tape Packing Tape 16-2 A7441PEX...

  • Page 68: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. SET BAG L0301UB 1EM320014A Before replacing any of these components, read RFID LABEL P7100UM ---------- carefully the product safety notice in this service LABEL EAS(H3761UD) MAKER ---------- NO.ZLLFNSLE1...

  • Page 69: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. CHIP CERAMIC CAP .(1608) CH J 47pF/50V CHD1JJ3CH470 Before replacing any of these components, read CHIP CERAMIC CAP . F Z 1µF/10V CHD1AZ30F105 carefully the product safety notice in this service CHIP CERAMIC CAP .
  • Page 70 Ref. No. Description Part No. Ref. No. Description Part No. C714 CHIP CERAMIC CAP . F Z 1µF/10V CHD1AZ30F105 C921 ELECTROLYTIC CAP . 1000µF/6.3V M CE0KMASDL102 C715 CHIP CERAMIC CAP . B K 1500pF/50V CHD1JK30B152 C922 ELECTROLYTIC CAP . 470µF/6.3V M CE0KMASDL471 C716 CHIP CERAMIC CAP .
  • Page 71 Ref. No. Description Part No. Ref. No. Description Part No. C1359 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 D431 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 C1360 CHIP CERAMIC CAP .(1608) F Z 0.1µF/25V CHD1EZ30F104 D432 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 C1361 ELECTROLYTIC CAP . 47µF/16V M CE1CMASDL470 D433 SWITCHING DIODE 1SS133(T-77)
  • Page 72 Ref. No. Description Part No. Ref. No. Description Part No. D920 IC SHUNT REGULATOR KIA431-AT/P NSZBA0TJY036 L402 COIL CHOKE ELC10D101EL LLC101KMS003 D921 ZENER DIODE MTZJT-775.6C QDTC0MTZJ5R6 L403 COIL CHOKE ELC10D101EL LLC101KMS003 D922 ZENER DIODE MTZJT-775.6C QDTC0MTZJ5R6 L601# LINE FILTER 5.0MH 6Y075 LLBG00ZKT004 D923 IC SHUNT REGULATOR KIA431-AT/P...
  • Page 73 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 15k Ω Q1005 TRANSISTOR KTA1267-GR-AT/P NQS1KTA1267P R434 RRXAJR5Z0153 CHIP RES. 1/10W J 2.2k Ω Q1006 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P R435 RRXAJR5Z0222 CHIP RES. 1/10W J 10k Ω Q1007 TRANSISTOR KTC3199-GR-AT/P NQS4KTC3199P...
  • Page 74 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 100 Ω CARBON RES. 1/2W J 1.0 Ω R738 RRXAJR5Z0101 R914 RCX2JZQZ01R0 CHIP RES. 1/10W J 100 Ω CHIP RES. 1/10W F 1.2k Ω R739 RRXAJR5Z0101 R915 RRXAFR5H1201 CHIP RES.
  • Page 75 Ref. No. Description Part No. Ref. No. Description Part No. METAL OXIDE FILM RES. 1W J 0.39 Ω CHIP RES. 1/10W J 56 Ω R982 RN01R39ZU001 R1231 RRXAJR5Z0560 CHIP RES. 1/10W F 3.3k Ω CHIP RES. 1/10W J 56 Ω R985 RRXAFR5H3301 R1233...
  • Page 76 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W 0 Ω R1350 RRXAZR5Z0000 JS903 PCB JUMPER D0.6-P10.0 JW10.0T CHIP RES. 1/10W J 4.7k Ω R1352 RRXAJR5Z0472 SCREW B-TIGHT D3X8 BIND HEAD+ GBJB3080 CHIP RES. 1/10W J 15k Ω R1353 RRXAJR5Z0153 SA601#...
  • Page 77 IR SENSOR CBA Ref. No. Description Part No. IR SENSOR CBA ---------- Consists of the following: CAPACITOR C1142 ELECTROLYTIC CAP . 2.2µF/50V M H7 CE1JMAVSL2R2 RESISTOR CARBON RES. 1/4W J 120 Ω R1143 RCX4JATZ0121 MISCELLANEOUS CL1104 WIRE ASSEMBLY 5PIN SENSOR 20V 5PIN/ WX1A7140-002 305MM RV1142...
  • Page 78 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. LD200EM8 A7441UH 2007-03-08...

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