Sharp LC-50LE442U Service Manual
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Sharp LC-50LE442U Service Manual

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SERVICE MANUAL
LED COLOR TELEVISION
MODEL:
LC-50LE442U

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  • Page 1 SERVICE MANUAL LED COLOR TELEVISION MODEL: LC-50LE442U...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTION IMPORTANT SERVICE SAFETY PRECAUTION ................………………………2 CHAPTER 1. SPECIFICATIONS [1] SPECIFICATIONS ............................4 [2] DIMENSIONS ..............................5 CHAPTER 2. REMOVING OF MAJOR PARTS [1] REMOVING OF MAJOR PARTS ....................... 8 CHAPTER 3. ADJUSTMENT PROCEDURE [1] ADJUSTMENT PROCEDURE ........................ 24 [2] SERVICE MODE .............................

  • Page 5: Specifications

    CHAPTER 1. OPERATION MANUAL [1]SPECIFICATIONS...

  • Page 6: Dimensions

    [2]DIMENSIONS LC-50LE442U VESA-compatible wall TV screen size (Inches) Screw type bracket (millimeters)(W*H)
  • Page 7 50'' 400*400mm Metric 8*14mm Setting the TV on the wall (LC-50LE442U)

  • Page 8: Chapter 2. Removing Of Major Parts

    CHAPTER 2. Removing of Major Parts LC-50LE442U 1. Assy/Panel Removal Notes: Please put your machine on soft material to avoid scrape panel when you disassemble it. Front view Fig.1 Back view Fig.2...
  • Page 9 Step1. Remove the Base Assy. Remove the 4 screws as Fig.3 and pull out the base. Fig.3 Step 2. Remove the REAR COVER Assy. 1. Remove the 19 screws, around the REAR COVER as Fig.4. Fig.4...
  • Page 10 2. Remove the 3 screws at the IO area as Fig.5. Fig.5 3. Remove the 3 screws to release AC cable as Fig.6 .Fig.7 Fig.6 Fig.7...
  • Page 11 Step3. Remove the Main, Power, IR board, Key Pad ASSY, and the Speakers. Fig.8 1. Remove the 8 screws and disconnect 4 cables .Detach the Main board ASSY as Fig.9 Fig.9...
  • Page 12 2. Remove the 4 screws and 3 Cables. Detach the Power board as Fig.10. Fig.10 3. Remove the 1screws. Detach the IR board as Fig.11. Fig.11...
  • Page 13 4. Remove the 2screws.Detach the Key Pad ASSY as Fig.12. Fig.12 5. Detach the Speakers as Fig.13. Fig.14. Fig.13 Fig.14...
  • Page 14 Step4. Remove BASE SUPPORT. Remove the 8 screws. Detach the BASE SUPPORT as Fig.15 Fig.15 Step5. Remove PANEL module. 1. Detach the PANEL HOLDER (9 pcs) as Fig .16 Fig.16...

  • Page 15: Chapter 3. Adjustment Procedure

    CHAPTER 3. ADJUSTMENT PROCEDURE [1]ADJUSTMENT PROCEDURE 1. Main Menu (The default value is marked in red) Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Picture Settings AV Mode User/ Standard/ Movie/ Game/ PC/ Dynamic/ Dynamic(Fixed) Off/ On Disable when AV mode is Backlight...
  • Page 16 Reset Yes/No (Only reset currect AV mode settings.) Power Control No Signal Off Enable/ Disable Power Saving Disable when Off/ On AV mode is Dynamic(Fixe System Options View Option View Mode Freeze Change Audio Mono/ Stereo/ Audio English/ Language Spanish/ French Change CC Analog Closed Off/ CC1/ CC2...
  • Page 17 HDMI Setup HDMI Mode Auto/ Graphic/ (For HDMI only) Video Speaker On/ Off Caption setup Caption Style Default/ (For TV & AV Custom only) Caption Size Small/ Standard/ Large Foreground Color Black/ White/ Green/ Blue/ Red/ Cyan/ Yellow/ Magenta Foreground Opacity Solid/ Translucent/ Transparent...
  • Page 18 All Data Clear Yes/No Language English/ Español/ Français Individaul Setup Secret No. New Secret No. (Input Secret Confirm Secret No.) (For TV & AV Parental CTRL V-Chip MPAA G/ PG/ only) PG-13/ R/ NC-17/ X/ NONE TV Guidelines TV-Y/ TV-Y7/ TV-G/ TV-PG/ TV-14/ TV-MA/...
  • Page 19 2. Display adjustment Only adjust HDMI Mode and copy to all of input source General set-up: Equipment Requirements: Minolta CA-210 or Equivalent Color analyzer or equivalent instrument. Input Signal Type: 1. Internal full white pattern. 2. Select Picture mode to Standard mode and check the x, y data. Input Injection Point: HDMI cable Alignment method:...

  • Page 20: Service Mode

    2. Before adjusting, all color analyzers (CA-210) should be coordinates with a same reference TV set. 3. Luminance>=240 cd/m2 in the center of screen when Brightness control at 100,Contrast control at 100,Backlight control at 100.(For LC-50LE442U ,Test color mode: User mode) [2] SERVICE MODE Enter factory mode menu: press MENU + Numeric keys “3481”...

  • Page 21: Software Upgrade Procedure

    [4] SOFTWARE UPGRADE PROCEDURE 1. Connect to TV USB port to upgrade the software firmware Please follow the following steps to upgrade the firmware. Turn on TV. Press MENU; select Information Identification to check "Version" III. Copy the correct software firmware (*.pkg) to USB disk. NAS2A_89.pkg Ex: Version: V2.0, copy to USB disk.
  • Page 22 The sound is not emitted from the speaker though the picture has come out. No sound output in all models? TEREMINAL TEREMINAL Is the audio signal output of pin (96) (AOSDATA0), pin (95) (AOBCK), pin (94) Check IC U2102 and its peripheral circuits. (AOLRCK) and pin (93) (AOMCLK) of IC U2102 normal? Is audio signal input to pin (6) (AOSDATA0),...
  • Page 23 No sound (during the reception of TV broadcasting) Does not the sound go out though the picture has come out when UHF/VHF is received? MAIN UNIT: Check the tuner and its peripheral circuits. Replace as Is the DIF signal output from pin (10) and pin (11) of required.
  • Page 24 No sound from external input devices (1) Does not the sound of the audio signal input to input (Component) go out? MAIN UNIT: Is the audio signal properly sent to pin (8) and pin Check the connection to CN1202 and the external (10) of CN1202? input device.
  • Page 25 No sound from external input devices (2) Does not the sound of the audio signal input to VGA go out? MAIN UNIT: Is the audio signal properly sent to pin (3) and pin Check the connection to CN1102 and the external (2) of CN1102? input device.
  • Page 26 No sound from external input devices (3) Does not the sound of the audio signal input to USB go out? Is USB stick audio format correct? Change to correct mp3 format MAIN Is the USB +5V Q7105 sent to pin (1) of CN1104? Check the connection to Q7105 and the external input device.
  • Page 27 The audio signal is not output No audio signal output from Headphone terminal (CN6201). Terminal Is audio signal output from pin (12) (OUTL) and pin Check the connection to HPOL(R) OUT and (3) (OUTR) of IC U6201 to Jack (CN6201)? external devices.
  • Page 28 The audio signal is not output No audio signal output from SPDIF terminal (CN6202). Terminal Is input source on HDMI? The SPDIF out not Change input source to others (AV, TV, etc.). support HDMI source. Is the audio signal output from IC U2102 pin (92) Check the line between IC U2102 and CN6202.
  • Page 29 No picture on the display (1) The picture doesn't appear in all modes. Main UNIT: Check LVDS signal output from IC U2102 or not? (O0N/O0p),(O1N/O1P),(O2N/O2P),(O3N/O3P),(OCKN/OCKP), (E0N/E0p), (E1N/E1P), (E2N/E2P), (E3N/E3P), (ECKN/ECKP) Check IC U2102 and its peripheral control circuits. Check signal Check relative components are ok or not.
  • Page 30 No picture on the display (2) Does not the picture come out when VHF/UHF is received? Main UNIT: Check TU_VCCr/VCCK/DDRV/AV33/DV33/+3V3SB Check each power IC and peripheral is applied to Tuner and U2102 or not. components are correct or not. Is the DIF signal output from pin (10) and pin (11) of Check the tuner and its peripheral circuits.
  • Page 31 <External input Input (Side HDMI)>No picture on the display (3) Does not the picture display when HDMI cable plugged into HDMI1? Terminal Check the line between pin (78) of IC Is the HOT_PLUG detection function of U2102 and CN8103. pin (19) of HDMI terminal (CN8103) Check the connection and setup with Main UNIT: Is TMDS signal input into pin...
  • Page 32 <External input Input (Rear_HDMI2)>No picture on the display (4) Does not the picture display when HDMI cable plugged into HDMI 2? Terminal Check the line between pin (7) of IC Is the HOT_PLUG detection function of U2102 and CN8101 pin (19) of a HDMI terminal (CN8101) Check the connection and setup with Is TMDS signal input into pin the external HDMI devices.
  • Page 33 <External input Input(Rear HDMI3)>No picture on the display (5) Does not the picture display when HDMI cable plugged into HDMI 3? Terminal Check the line between pin (1) of IC Is the HOT_PLUG detection function of U2102 and CN8102. pin (19) of a HDMI terminal (CN8102) Check the connection and setup with Is TMDS signal input into pin the external HDMI devices.
  • Page 34 <External input USB>No picture on the display (6) Does not the picture display when USB cable plugged into USB port? Change to correct .jpg or .jpeg or .png or Is USB stick video format correct? .bmp format. Main UNIT: Check the fuse F1101 and the external Is the USB +5V sent to pin (1) of input device.
  • Page 35 <External input (Component)>No picture on the display (7) Does not the picture display when RCA cable plugged into component? Terminal Is Component Y/Pb/Pr signal sent to pin Check the setting of an external input (2)/Y, (4)/Pb, (6)/Pr of CN1202? device that connects of CN1202 Main UNIT: Check the line between IC U2102 and <External input...
  • Page 36 <External input D-SUB>No picture on the display (8) Does not the picture display when VGA cable plugged into D-SUB ? Set the timing which TV is support? Is Video format correct? Terminal Is R/G/B/H/V signal sent to pin (1)/RED, Check the setting of an external input (2)/Green, (3)/BLUE, (14)/H sync#, device that connects of CN1101 Main UNIT:...
  • Page 37 Power unit operation check Are the power cord and harness in the Power cord and harness in the unit unit connected Line filter unit? LX103 ,LX104 or RT101 If F102 normal is out of order? Does BD101 output 169V when AC Change a new full-wave rectifier diode to input 120V? check the output voltage.

  • Page 38: Chapter 5. Major Ic Informations

    CHAPTER5. MAJOR IC INFORMATIONS [1]MAJOR IC INFORMATIONS 1.1. U2102 (MT5389) The MediaTek MT5389FUNU family consists of a DTV front-end demodulator, a backend decoder and a TV controller and offers high integration for advanced applications. It combines a transport de-multiplexer, a high definition video decoder, an audio decoder, a dual-link LVDS transmitter, a mini-LVDS transmitter (option), an EPI transmitter (option) and an NTSC/PAL/SECAM TV decoder with a 3D comb filter (NTSC/PAL).
  • Page 39 11. LVDS, mini-LVDS (option), EPI (option) 1.2. U3101 ( NT5CB64M16DP Description The 1Gb Double-Data-Rate-3 (DDR3/L) B-die DRAMs is double data rate architecture to achieve high-speed operation. It is internally configured as an eight bank DRAM. The 1Gb chip is organized as 16Mbit x 8 I/Os x 8 banks or 8Mbit x 16 I/Os x 8 bank devices. These synchronous devices achieve high speed double-data-rate transfer rates of up to 1866 Mb/sec/pin for general applications.
  • Page 40 1.3. U6102 (YAMAHA YDA175) Features ・Supply Voltage Range VDDP 5V*1) to 18V ・Input Digital Audio Interface (Stereo) Sampling Frequency: 32kHz, 44.1kHz, 48kHz Left-justified, MSB first, 1-bit delay, Digital Audio Data 24-bits ・Max. Instantaneous Output 15W×2ch (VDDP=15V, RL=8Ω, THD+N=10%) 10W×2ch (VDDP=12V, RL=8Ω, THD+N=10%) 10W×2ch (VDDP=12V, RL=6Ω, THD+N=10%) ・Max.
  • Page 41 · Operates With 3-V to 5.5-V VCC Supply · Operates up to 250 kbit/s · One Driver and One Receiver · Low Standby Current . . . 1 μA Typical · External Capacitors . . . 4 ´ 0.1 μF ·...

  • Page 42: Chapter 6.Block Diagram/Wiring Diagram

    CHAPTER 6.BLOCK DIAGRAM/WIRING DIAGRAM [1]BLOCK DIAGRAM LVDS OUT TUNER H702F 1Gb DDR3 HDMI1 Side Rear HDMI2 8MB FLASH HDMI3 Rear Side MT5389 PC INPUT YDA175 SPEAKER AUDIO AMP YPbPr+CVBS ASPDIF SPDIF Output (NAFTA) Hotel Mode RS 232 (NAFTA) Earphone Earphone amp.DRV632 Side...

  • Page 43: Power Management Block Diagram

    [2]POWER MANAGEMENT BLOCK DIAGRAM There are 1 part circuits in Power board of this project (fig.1), Power circuits which is a single layer board, There are 3 output in the power parts, one is interface board including USB and TV tuner et; the other is inverter board and audio circuit.+24V output is inverter part.

  • Page 44: Wiring Diagram

    [3]WIRING DIAGRAM...

  • Page 45: Main Unit Printed Wiring Board

    CHAPTER 7.PRINTED WIRING DIAGRAM [1]MAIN UNIT PRINTED WIRING BOARD TOP :LC-50LE442U...
  • Page 46 BOTTOM: LC-50LE442U...

  • Page 47: Power Unit Printed Wiring Board

    [2]POWER UNIT PRINTED WIRING BOARD Top Layer...
  • Page 48 Bottom Layer...

  • Page 49: Key Unit Printed Wiring Board

    [3]KEY UNIT PRINTED WIRING BOARD [4] IR UNIT PRINTED WIRING BOARD...

  • Page 50: Chapter 8.Schematic Diagram

    CHAPTER 8.SCHEMATIC DIAGRAM [1]MAIN SCHEMATIC DIAGRAM 01 System POWER...
  • Page 51 02 MT5389...
  • Page 52 03 DDR3 DRAM/Flash.
  • Page 53 04 Peripheral / IR/Keypad /ESD...
  • Page 54 05 HDMI...
  • Page 55 06 VGA/RS-232/USB...
  • Page 56 07 YPbPr...
  • Page 57 08 Audio amp.
  • Page 58 09 Headphone/ line out /SPDIF...
  • Page 59 10 LVDS 11 Tuner...

  • Page 60: Power Schematic Diagram

    [2]POWER SCHEMATIC DIAGRAM 1) AC Input and EMI Filter:(fig.7) Fig.7 CN101 is a connector for connecting AC Power.F102 is fuse to protect all the circuit AC. Input voltage is single 120V. CY101, CY102, CY103 are used high frequency noise of primary between common GND.LX103,LX104,CX101, CX102 is used to filter low frequency noise.
  • Page 61 2) Standby Control&DC-DC&ACD Circuit:(fig.8) Fig.8 Fig.9...
  • Page 62 BD101 is a rectifier in which there are 4 build-in diodes, inverting AC to DC. CP110,CP111 is used to smooth the wave from rectifier. FR801 is a fuse resistor to protect the following circuit when inrush current is too large. UM102 is a current-mode PWM controller with excellent power-saving operation, It features a high-voltage current source to directly supply the startup current from two half-wave rectifier diodes further to provide lossless startup circuit.
  • Page 63 UM102 is powered on to start issuing the gate drive signal , the high-voltage current source is then disabled ,and the Vcc supply current is provided from the auxiliary winding of the transformer PIN3. UM102 Pin3 is protection PIN.RM101 are sense circuit, UM102 detects the MOSFET current, from the CS in.

  • Page 64: Key Schematic Diagram

    [3]KEY SCHEMATIC DIAGRAM ME. Top Down Sequence (Before 2K12 H1) POWER_KEY INPUT MENU VOL- VOL+ 電阻 PULL HIGH 10K, Tolerance:5% ME. Top Down Sequence ( 2K12 H2) 增加一個 與線材決定是否連接 GND, VOL+ VOL- MENU INPUT POWER_KEY CN901 4P 2.0mm 90° (W/L) ADC1 ADC0 C901...

  • Page 65: Chapter 9.Parts Guide

    CHAPTER 9.PARTS GUIDE LC-50LE442U Recommended Spare Parts List Material 751205A00-600-G Region Description LC-50LE442U Updated date 2013/01/11 Item Catalog Component no. Object description Photo LCDModule,TFT,TV, 50Inch,1920*1080,30 Panel 9JY76040T100531G 0cd/m**2,5000:1,8ms ,G,V500HJ1-LE1 LC-50LE442U/CTN0 9JY0150CTN06100 6,Mother Board LC-50LE440U/ 9JY0950CTN02000 CTN02,Power Board PCBA LC-50LE440U/ 9JY0350CTN02000...
  • Page 66 9JY00900011928 ASSY BASE,CTN02 ASSY 9JY02500013949 NECK-SUPPORT,CT ASSY SIDE 9JY02500013939 BRACKET,CTN02 ASSY BACK 9JY00900011926 COVER,CTN02 FUNCTION 9JY01201019574 KEY,CTG04 9JY02501022530 SHIELDING ,CTL02 PANEL 9JY02500013942 HOLDER,CTN02 9JY01201019663 AC COVER,VT464D LCD Cable 9JY35101YM00600G Assembly,350mm, +10/-0mm,G Cable AC Power 9JY35071BT00600G Cable,1.6m+0.25m, +/-50mm,18AWG,...
  • Page 67 FFC Cable Assembly, 9JY35110J100600G 403mm,+6/-0mm,0.5 mm," LCD Cable 9JY35101T100600G Assembly,700mm, +14/-0mm,G LCD Cable 9JY35101YQ00600G Assembly,1350mm,+ 15/-0mm,G Speaker Speaker 9JY57020RH0035CG Unit,6ohm,10W,G, 603-0001-8016 Remote Accessory 9JY600153G00886G Controller,IR,NEC,8 m,G,RC-LCDTV-5 SCREW,B,CROSS,M Screw 9JY06004013247 5*25L-Φ5*30,BLK-Zn ,ROHS...

  • Page 68: Cabinet Parts

    [2]CABINET PARTS LC-50LE442U...

  • Page 70: Supplied Accessories

    [3]SUPPLIED ACCESSORIES LC-50LE442U Item Sharp PN DESCRIPTION 1 9JY600153G00886G Remote Controller,IR,NEC,8m,G,RC-LCDTV-520 2 9JY89010330021YG Primary Battery,1.5V,Zn-Mn Battery(????) 9JY00900011928 ASSY BASE,CTN02 9JY06004013247 SCREW,B,CROSS,M5*25L-Φ5*30,BLK-Zn,ROHS 4 9JY08300012493 USER MANUAL,CTN06 5 9JY08300011102 CONNECTION GUIDE,CTN02...

  • Page 71: Packing Parts

    [4]PACKING PARTS LC-50LE442U...
  • Page 72 LC-50LE442U ASSY,PACK,40H FOR S360,CTN02 Item Sharp PN Description Q'TY 9JY08401019830 CARTON,BOTTOM,CTN02 9JY08400019768 CUSHION BOTTOM-LEFT,CTN02 9JY08400019769 CUSHION BOTTOM-MIDDLE,CTN02 9JY08400019771 CUSHION BOTTOM-RIGHT,CTN02 9JY08400019770 BAG EPE PO L1300xW850xT0.5x0.05mm,CTN02 9JY751205A00600G LCD TV,LED LCD,50Inch,1920x1080,CTN06 9JY00900011928 ASSY BASE,CTN02 9JY08400019764 BAG LDPE L650xW400xT0.05MM,CTN02 9JY08400019765 CUSHION TOP-LEFT,CTN02 9JY08400019766...

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