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Emerson EWL20D6 Service Manual

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SERVICE MANUAL
Model EWL20D6 has A version and non-A version types.
This service manual is for the EWL20D6 non-A verion models.
For the A version models, suffix A is printed to the model number as
EWL20D6 A on the Rating Label, and for the non-A version models, suffix
A is not printed to the model number.
Refer to the Rating Label on the back of the unit to make sure model types.
20" LCD TV/DVD
EWL20D6

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  • Page 1 This service manual is for the EWL20D6 non-A verion models. For the A version models, suffix A is printed to the model number as EWL20D6 A on the Rating Label, and for the non-A version models, suffix A is not printed to the model number.
  • 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 2. Audio S/N 40/40 < LCD PANEL > Description Condition Unit...
  • Page 5 DVD Section < > Description Condition Unit Nominal Limit 1. Horizontal Resolution (TDV-540 TIT.2 CHP.16) Line 2. Video S/N (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 6: 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 7: 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 8 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 9 Precautions during Servicing A. Parts identified by the # symbol are critical for L. When connecting or disconnecting the internal safety. connectors, first, disconnect the AC plug from the Replace only with part number specified. AC supply outlet. B. In addition to safety, other parts and assemblies M.
  • Page 10 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 11: 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 12 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 13 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 14 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 15: 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 16 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 17 (S-1) (S-2) (S-1) (S-1) [1] Rear Cabinet (S-3) (S-1) [2] Tilt Stand Assembly Fig. D1 L2652DC...
  • Page 18 [6] DVD Holder [3] Jack Holder [5] DVD Mechanism (S-4) (S-8) (S-7) (S-5) (S-7) (S-4) (S-7) (S-6) [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...
  • Page 19 [8] Inverter CBA (S-9) (S-9) (S-10) (S-10) (S-9) [7] Main CBA (S-9) Fig. D3 L2652DC...
  • Page 20 [14] Front Cabinet [10] Function CBA (S-12) [12] Speaker(R) Speaker Holders (S-14) (S-11) [11] IR Sensor CBA (S-11) (S-13) (S-11) [13] Speaker(L) Speaker Holders (S-15) [9] LCD Module (S-11) Fig. D4 L2652DC...
  • Page 21 [15] Stand Cover [16] Arm Holder (S-17) [17] Sheet R [18] Arm Assembly (S-16) [17] Sheet L (S-16) Fig. D5 L2652DC...
  • Page 22 TV Cable Wiring Diagram To DVD Mechanism DVD Main CBA Unit Function CBA CN201 CN301 CLN904 CN801 CN601 CN401 To LCD Module Main CBA Inverter CBA CN1205 CN1206 CN1207 CN1201 CN301 CN404 CN304 To LCD CN302 CN1701 Module CN1651 CN303 CN310 CN801 CN1202...
  • Page 23 3. How to Eject Manually 1. Remove the Rear Cabinet. 2. To remove the DVD Main CBA Unit, remove a screw (S-6) in Fig. D2. Do not disconnect connectors. 3. To remove the Chassis Cover, remove two screws A as shown in Fig. D7. 4.

  • 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 3. If Flicker Adjustment is not fit, the screen becomes Button the following. [Use the attached Data Item remote control unit. Value (not service remote control unit)] VCOM D2-BRT D2-CNT D2-CLR-R [MENU] → [5] D2-CLR-B D2-TNT D2-SHR D3-BRT D3-CNT FLASH (Go and Off) D3-CLR-R [MENU] →...
  • Page 26 The following adjustment normally are not 5. [VIDEO1] attempted in the field. Only when replacing the Press “6” button to select “DB(C/D1)” for Blue LCD Panel then adjust as a preparation. adjustment. Press “4” button to select “DR(C/D1)” for Red adjustment. When “x” value and “y” value 3.
  • Page 27 Note: The optical receptor must be set perpendicularly to the LCD Panel surface. 4. [VIDEO1] Enter the Service mode. Press “VOL p” button on the remote control unit and select “C/D1-” mode. [VIDEO2] Enter the Service mode. Press “VOL p” button on the remote control unit and select “C/D2-”...

  • 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 L2652BLS...
  • Page 31 IF/Video Block Diagram L2652BLIF...
  • Page 32 Audio Block Diagram L2652BLA...
  • Page 33 LCD Block Diagram L2652BLLCD...
  • Page 34 Power Supply Block Diagram L2652BLP...
  • Page 35 LCD Backlight Block Diagram L2652BLLB...
  • Page 36 BLOCK DIAGRAMS < DVD SECTION > System Control / Servo Block Diagram L2652BLSD...
  • Page 37 Digital Signal Process Block Diagram L2652BLD...

  • Page 38: Schematic Diagrams / Cba's And Test Points

    SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS Standard Notes 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. Replacement parts that have these special safety characteristics are identified in this manual and its supplements;...
  • Page 39 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 40 Main 1/6 Schematic Diagram < LCD TV Section > L2652SCM1 10-3...
  • Page 41 Main 2/6 Schematic Diagram < LCD TV Section > L2652SCM2 10-4...
  • Page 42 Main 3/6 Schematic Diagram < LCD TV Section > L2652SCM3 10-5...
  • Page 43 Main 4/6 Schematic Diagram < LCD TV Section > L2652SCM4 10-6...
  • Page 44 Main 5/6 Schematic Diagram < LCD TV Section > 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 45 Main 6/6 Schematic Diagram < LCD TV Section > L2652SCM6 10-8...
  • Page 46 Function Schematic Diagram < LCD TV Section > L2652SCF 10-9...
  • Page 47 IR Sensor Schematic Diagram < LCD TV Section > L2652SCIR 10-10...
  • Page 48 Inverter Schematic Diagram < LCD TV Section > L2652SCI 10-11...
  • Page 49 DVD Main 1/3 Schematic Diagram < DVD Section > 1 NOTE: Either IC461 or IC462 is used for DVD MAIN CBA UNIT. L2652SCD1 10-12...
  • Page 50 DVD Main 2/3 Schematic Diagram < DVD Section > L2652SCD2 10-13...
  • Page 51 DVD Main 3/3 Schematic Diagram < DVD Section > L2652SCD3 10-14...
  • Page 52 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, 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 53 Main CBA Bottom View CAUTION ! 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 replace only with same type 4 A, 125V fuse.
  • Page 54 Function CBA Top View IR Sensor CBA IR Sensor CBA Top View Bottom View BL2500F01012-3 Function CBA Bottom View BL3150F01031 10-17...
  • Page 55 Inverter CBA Top View Inverter CBA Bottom View BL2500F01021 10-18...

  • Page 56: Waveforms

    WAVEFORMS < LCD TV SECTION > WF1 ~ WF12 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) CLKH STH1 S-VIDEO-C 1DIV: 1.0V 10 s 1DIV: 1.0V 10 s 1DIV: 200mV 20 s Pin 2 of CN1206 Pin 26 of CN1206...
  • Page 57 WAVEFORMS < DVD SECTION > DVD-AUDIO(R) 0.5ms DVD-Y 0.1V 20µs WF13 WF16 Pin 1 of CN1701 Pin 7 of CN1701 DVD-C 0.1V 20µs SPDIF 0.1µs WF14 WF17 Pin 3 of CN1701 Pin 9 of CN1701 NOTE: Input CD: 1kHz PLAY (WF15~WF17) DVD: POWER ON (STOP) MODE DVD-AUDIO(L)

  • Page 58: Wiring Diagram

    WIRING DIAGRAM < LCD TV SECTION > L2652WI 12-1...
  • Page 59 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 AUDIO-GND GND(LD) 9 SPDIF DVD-LD 8 PD-MONI 7 GND(DVD-PD) 6 GND(CD-PD) 5 TS(-) 4...

  • Page 60: 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 L2550TI...

  • Page 61: Lead Identifications

    LEAD IDENTIFICATIONS 2SC2785(F) 2SA1175(F) 2SC4881F KIA7805API/P 2SA950-O(TE2 F T) BA1F4M-T 2SC2120-O(TE2 F T) KTC3199-GR-AT/P 2SD400(F) 1: IN 2: GND 3: OUT B C E 1 2 3 E C B E C B TC4053BF(EL N F) TC4052BF(ELNF) M61116FP TF0G AN5832SA-E1V TL3472CDR 2SK3869(Q) BU4223G-TR...

  • Page 62: Exploded Views

    EXPLODED VIEWS Cabinet Function CBA SP802 CLN802 CL1205 CL1206 CL1207 CLN320 Inverter CBA IR Sensor CBA SP801 CLN801 LCD1 A9-1 A9-4 A9-4 A9-2 A9-5 See Electrical Parts List for parts with this mark. CL1701 A9-6 Main CBA L3-10 AC601 CL1651 A9-3 DVD Main CBA Unit A9-5...
  • Page 63 Packing Some Ref. Numbers are not in sequence. Packing Tape Tape Packing Tape Packing Tape Packing Tape 15-2 L2652PEX...

  • Page 64: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. SCREW P-TIGHT M3X8 BIND HEAD+ GBJP3080 Before replacing any of these components, read SCREW P-TIGHT 3X14 WASHER HEAD+ GCJP3140 carefully the product safety notice in this service SCREW P-TIGHT M3X8 BIND HEAD+ BLK...

  • Page 65: 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 . CH D 3pF/50V CHD1JD3CH3R0 Before replacing any of these components, read C501 ELECTROLYTIC CAP . 22µF/50V M H7 CE1JMASSL220 carefully the product safety notice in this service C502...
  • Page 66 Ref. No. Description Part No. Ref. No. Description Part No. C781A ELECTROLYTIC CAP . 10µF/50V M H7 CE1JMAVSL100 C1239 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 C782 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 C1240 CHIP CERAMIC CAP .(1608) B K 0.1µF/50V CHD1JK30B104 C785 ELECTROLYTIC CAP .
  • Page 67 Ref. No. Description Part No. Ref. No. Description Part No. CN1206 CONNECTOR PRINT MES G/28/R/28FMN- JCFNG28JG021 D660 PCB JUMPER D0.6-P5.0 JW5.0T STK-A(L D663 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 CN1207 CONNECTOR PRINT MES G/28/R/28FMN- JCFNG28JG021 D664 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 STK-A(L D681 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 CN1209...
  • Page 68 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 5.6k Ω L601 LINE FILTER 5.0MH 6Y075 LLBG00ZKT004 R404 RCX4JATZ0562 CHIP RES. 1/10W J 3.3k Ω L631 INDUCTOR 47µH-K-5FT LLARKBSTU470 R406 RRXAJR5Z0332 CHIP RES. 1/10W J 10k Ω L632 INDUCTOR 47µH-K-5FT LLARKBSTU470...
  • Page 69 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W 0 Ω CHIP RES. 1/10W J 2.7k Ω R656 RRXAZR5Z0000 R816 RRXAJR5Z0272 CARBON RES. 1/4W J 390 Ω CHIP RES. 1/10W J 47k Ω R657 RCX4JATZ0391 R817 RRXAJR5Z0473 CHIP RES.
  • Page 70 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W 0 Ω CHIP RES. 1/10W J 100 Ω R1270 RRXAZR5Z0000 R1355 RRXAJR5Z0101 CHIP RES. 1/10W J 2.2k Ω CHIP RES. 1/10W J 100 Ω R1271 RRXAJR5Z0222 R1356 RRXAJR5Z0101 CHIP RES.
  • Page 71 Ref. No. Description Part No. Ref. No. Description Part No. BC1655 PCB JUMPER D0.6-P5.0 JW5.0T C326 ELECTROLYTIC CAP . 10µF/50V M CE1JMASDL100 CF31 CERAMIC FILTER SFSRA4M50CF00-B0 FBB455PMR004 C327 CHIP CERAMIC CAP .(1608) B K 0.01µF/50V CHD1JK30B103 F601 FUSE STC4A125V U/CT PAGE20CW3402 C328 ELECTROLYTIC CAP .
  • Page 72 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES. 1/10W J 10k Ω D350 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 R336 RRXAJR5Z0103 CHIP RES. 1/10W J 10k Ω D351 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133 R337 RRXAJR5Z0103 CHIP RES. 1/10W J 390 Ω D352 SWITCHING DIODE 1SS133(T-77) QDTZ001SS133...
  • Page 73 Ref. No. Description Part No. CARBON RES. 1/4W J 4.7k Ω R915 RCX4JATZ0472 SWITCHES SW901 TACT SWITCH SKQSAB SST0101AL038 SW902 TACT SWITCH SKQSAB SST0101AL038 SW903 TACT SWITCH SKQSAB SST0101AL038 SW904 TACT SWITCH SKQSAB SST0101AL038 SW905 TACT SWITCH SKQSAB SST0101AL038 SW907 TACT SWITCH SKQSAB SST0101AL038 SW911...
  • Page 74 EWL20D6 L2652UC 2006-06-26...

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