Kivi 40U710KB Service Manual
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Kivi 40U710KB Service Manual

Msd6886 chassis
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This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
SERVICE MANUAL
WARNING
LED TV
Model No.
40U710KB
MSD6886 Chassis

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  • Page 1 SERVICE MANUAL LED TV Model No. 40U710KB MSD6886 Chassis WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.

  • Page 2: Table Of Contents

    Model No.: Chapter 1: General Information 1-1. Table of Contents 1. General Information................1-1. Table of Contents 1-2. General Guidelines 1-3. Important Notice 1-4. How to Read this Service Manual 2. Specifications..................3. Location of Controls and Components........... 3-1. Board Location 3-2.
  • Page 3 Model No.: 8. Measurements and Adjustments..…………......8-1. How to enter into the factory model 8-2. How to update software 8-3. How to enter into the hotel model 9. Trouble-shooting………….............. 9-1. Simple Check 9-2. Main Board Failure Check 9-3. Panel Failure...

  • Page 4: General Guidelines

    Model No.: 1-2. General Guidelines When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
  • Page 5 Model No.: 1-3-6 Safety Check after Repairment :onfirm that the screws, parts and wiring which were removed in order to service are put in the original positions, or whether there are the positions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or external metal and the AC cord plug blades.
  • Page 6 Model No.: Electrostatically Sensitive (ES) Devices Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the ncidence of component damage caused by static by static electricity.

  • Page 7: How To Read This Service Manual

    Model No.: 1-3-8. Photo used in this manual The illustration and photos used in this Manual may not base on the final design of products, which may differ from your products in some way. 1-4. How to Read this Service Manual Using Icons: Icons are used to attract the attention of the reader to specific information.

  • Page 8: Specifications

    Model No.: 2. Specifications Model 40U710KB Screen Size 40 inch Aspect Ratio 16:9 Resolution 3840x2160 TYP:9.5 (GRAY TO GRAY Response Time (ms) GRAY) Angel of View 89° Colors 1.07G No. of Preset Channels 1000 OSD Language English Color System PAL/SECAM...

  • Page 9: Location Of Controls And Components

    Model No.: 3. Location of Controls and Components 3-1 Board Location Description A Board Main board B Board Power board 3 - 2 Main Board...
  • Page 10 Model No.: 3-2-1 Function Description: Main Board Process signal which incept from exterior equipment then translate into signal that panel can display. 3-2-2 :onnector definition Main board connector...
  • Page 11 1.DC POWER CONNECTOR (CN18) 1.DC POWER CONNECTOR (CN18) 2.TROMPETTE CONNECTOR(CN601)
  • Page 12 Model No.: 3.KEY AND IR CONTRAL CONNECTOR(CN7) 4. WIFI AND BT CONNECTOR(CN20)

  • Page 13: Power Board

    Model No.: 3-3. Power Board 3-3-1 Function Description: Supply power for Main board, Panel. 3-3-2Connectordefinition QDPH +12V +12V 】 +5VSB ON/OFF...

  • Page 14: Lcd Panel

    Model No.: 3-4. LCD Panel( LSC400FN05-8)

  • Page 15: Disassemble And Assemble

    Service Manual Model No.: Model No.: 4. Disassemble and assemble 4-1 Remove the Pedestal Lay down the unit so that rear cover faces upward Remove the four screw from the rear cover indicated with Then remove the pedestal 4-2Remove the Back Cover Remove the these screw indicated on figure above by Then remove the back cover from the unit.

  • Page 16: Remove The Power Module

    Service Manual Model N 4-3 Remove the power module Remove the four screw indicated on the figure above by Then remove the power module 4-4 Remove the Main board Remove the two screw indicated on the figure above by Disconnected the coupler Remove the Main board Model No.:...

  • Page 17: Remove The Speaker

    Service Manual 4-5 Remove the speaker Take out the speaker 4-6 Remove the remote control take out the remote control board...

  • Page 18: Installation Instructions

    Service Manual 5. Installation Instructions 5-1 External Equipment Connections INSTALLATION...

  • Page 20: Hdmi Connections

    Service Manual Model No.: 5-2 HDMI Connections When the source device supports HDM How To Connect 1. Connect the source device to HDMI port of this TV with an HDMI cable(not supplied with this product). 2. No separated audio connection is necessary. How To Use If the source device supports Auto HDMI function, the output resolution of the source device will be automatically...
  • Page 21 Service Manual HDMI Cable (not supplied with the product) HDMI to DVI Cable ( not supplied with the product) Analog Audio Cable (Stereo to RCA type) (not supplied with the product) Power source TO USE AC POWER SOURCE Use the AC polarized line cord provided for operation on AC.

  • Page 22: Operation Instructions

    standard polarized AC outlet. NOTES: Never connect the A: line cord plug to other than the specified voltage. Use the attached power cord only. If the polarized A: cord does not fit into a non-polarized A: outlet, do not attempt to file or cut the blade. It is the user’s responsibility to have an electrician replace the obsolete outlet.
  • Page 23 Service Manual 6-3 Setting Up Your Remote Control...
  • Page 24 9. Trouble shooting 9-1. Simple check...
  • Page 25 Service Manual...
  • Page 26 Service Manual Model No.: 9-2. Main board failure check No picture but have sound Check if there is Check whether the normal +1-3V at Pin12 -13 Replace Power supply work of the backlight in CN18 Check if there is +12V at Replace Main board Replace the Change LVDS...
  • Page 27 Service Manual Trouble Shooting AV No sound but have picture Check if there is sound input signal Check the input source Check if there is signal at R1344 R1346 c1313 Check if there is signal at Change U201 c1312 Check if there is signal at LD11/ LD12/ LD13/ LD14 Check LD108 12 VPOWER Change UD3 Y es...
  • Page 28 Service Manual Trouble Shooting No sound No picture NO LED indicate Check if there is voltage in Change the CN18 PIN1/2 12V; power board Still having problems Check if L106(1.5 V) ， Change PU2/U12/U109/U703/U107 PL1(5V);L12(3.3V); L109(1V);L104(1V) Change Mainboard Change the mainboard To upgrade \SOFTWARE...
  • Page 29 Trouble Shooting Poor sound Poor sound Verify if sound system is Change Speaker correct . For ease of use, recommend that customer format the picture and sound settings in the automatic option. Update the software and Still having make the reboot; problems or change the Mainboard...
  • Page 30 Service Manual Trouble Shooting • Mainboard not work Panel not work  • 1. check if there is +12 1. check if the voltage input and  output on the power board output of voltage boost IC of the • 2.Verify if the DC/DC convertors backlight is OK ；...
  • Page 31 Trouble Shooting Power board not work  1.Verify if the power cord connect well；  2. check if +12Vstandby of the power  board part is functioning normally; 3. Check if voltage of the POWER  ON/OFF of the power board part is on the high level voltage;...
  • Page 32 9-3. Pannel failure Failure Mode Part Name Description Phenomena Failure cause racking Block Defect :TCP cracking or c Dim or L/D :TCP Sunken V B/D Vertical bar :TCP lead cracking :ACF bonding short :Awful environment and something electric ente V Dim Vertal gray line into LCD :Mis-align between TCP...
  • Page 33 Service Manual Part Name Description Phenomena Failure cause I n c o m i n g I n s p e c t i o n Standard Bright dot dark dot in Dot Defect pannel Bladder between Polarizer and top glass Polarizer Bubble Bladder in Polarizer P a n e l o r...
  • Page 34 Failure Mode Part Name Description Phenomena Failure cause White Screen B/L normal, only white screen display M a yb e c a u s e d by surge current Black Screen B/L normal, and EDS only Black screen display FIIcker Crosstalk Vcom imbalance Circuit...
  • Page 35 U201G AA17 AB17 AD17 CORE Power Standby Power 3.3V U201F AA13 VDDC_CPU VDDC_CPU +0.95V_VDDC VDDC AB13 VDDC_CPU AC13 VDDC_CPU AD13 3.7A,100mil VDDC_CPU AE13 VDDC_CPU +3.3V_Standby +3.3V_Standby +3.3V_Standby AVDD_DMPLL AVDD_DADC AF13 C301 C302 C303 C369 C304 C305 VDDC_CPU AA14 10mA,15mil VDDC_CPU AB14 10uF/6.3V 0.1uF...
  • Page 36 Ver. Date change list V100 2018.03.10 Initial 2018.04.03 Final version for layout of MST148B 对 对 对 对 改 改 ； V101 2018.04.12 Audio Linein R 7 1 4 / R 7 1 5 / R 7 1 8 / R 7 4 0 1 8 K 相...
  • Page 37 主 POWER +12V_PWR SY8105/5A +0.95V_VDDC 3500mA VDDC 4045mA 120mA DVDD_DDR 200mA AVDDL_HDMI 225mA AVDDL_MOD MSH6103A/3A +0.95V_VDDC_CPU 1000mA VDDC_CPU +12V_AMP AO3401A +12V_Panel SY8120 +5V_Normal USB/Panel 600mA EXT:DDR3 50mA AVDD_DDR SY8113A +3.3V_Standby SY8089 +1.5V_DDR3 250mA AVDD_DDR_A 2800mA 1395mA 200mA AVDD_DRAM 295mA AVDD_DDR_B 10mA AVDD_DMPLL 478mA...
  • Page 38 预 预 预 预 留 留 留 留 1 2V-5 V +3.3V_NORMAL DC-DC Connector PC17 IC-DCDC/563201 0.01uF-25V-M-0201-X5R-X7R +3.3V Power +12V_PWR +12V_PWR 工 工 工 工 4 7 7 K h z 占 占 占 4 3 % 工 工 工 工 1 .
  • Page 39 HDMI/Audio Block PCMCIA/TS/NAND/FE GPIO Pull up U201C U201B HDMI1-RX0N A_RX0N +3.3V_Standby HDMI1-RX0P A_RX0P HDMI1-RX1N C219 0.1uF YPBPR_AUL A_RX1N LINEIN_L0 DIFP KEY0-in HDMI1-RX1P C220 0.1uF C262 0.1uF R202 4.7K A_RX1P LINEIN_R0 YPBPR_AUR IP_T DIFP EMMC-D0 AH11 C263 0.1uF DIFM HDMI1-RX2N EMMC-D0 DIFM A_RX2N LINEIN_L1...
  • Page 40 AVDD_DRAM BA2,CSB1,CSB2 need GND shielding DDR3 4G bit 2133MHz AVDD_DDR_2_S AVDD_DDR_2_S U201A D_DDR3_WEZ A0 / WEZ / A8 / A9 D_DDR3_A15 A1 / A15 / A12 / A12 D_DDR3_A0 B-RSTZ NT5CB256M16ER-FL A-RST A2 / A0 / A2 / A7 D_DDR3_RASZ NT5CB256M16ER-FL A3 / RASZ / BA1 / A15 D_DDR3_CASZ...
  • Page 41 POWER eMMC +1.8V_Normal EMMC_VIO U501 eMMC EMMC_CLK EMMC_D4 C1326 C511 C512 EMMC_CMD EMMC_D5 EMMC_D0 EMMC_D6 0.1uF 2.2uF 0.1uF EMMC_D1 EMMC_D7 EMMC_D2 EMMC_DS R501 AGND EMMC_D3 EMMC_RST RESET +3.3V_EMMC VDD_IF EMMC_VIO NDD_IF VDD_IF VDD_IF +3.3V_Normal +3.3V_EMMC VDD_IF C515 C506 C507 2.2uF 0.1uF 0.1uF C508...
  • Page 42 4K2K TCON 時 時 時 座 座 座 座 ， 即 出 出 出 出 l a y o u t V B 1 S O C 過 過 座 座 過 出 過 座 座 V B 1 5 1 p i n CMI/LG/Samung 4K2K@60HZ P1104 NC/FI-RE68S-HF +Panel_VCC...
  • Page 43 SPDIF OUT U601 R619 HST-0041 P604 MDI_TP RJ45 MDI_TP NET_TD+ +5V_Standby NET_TD- R221 NC/0R SPDIFOUT MDI_TN P1102 MDI_TN R1339 R1338 SPDIFOUT SPDIF-OUT TDCT CH_GND D1028 COXICAL RDCT MDI_RP NC/TPD1E10B09 MDI_RP GND1 NET_RD+ NC/OPTICAL GND2 NET_RD- 光 光 光 光 MDI_RN MDI_RN R622 SPDIF-OUT...
  • Page 44 HDMI1(ARC) P801 HDMI/90D HDMI1_RX2P HDMI1-RX2P HDMI1-RX2P DATA2+ HDMI1-RX2P +5V_HDMI1 HDMI1-RX2N DATA2 SHIELD HDMI1_RX2N HDMI1-RX2N HDMI1-RX2N DATA2- HDMI1_RX1P HDMI1-RX1P +5V_HDMI1 HDMI1_HPD DATA1+ R802 HDMI1-HPD HDMI1-RX1P R801 R803 DATA1 SHIELD HDMI1_RX1N HDMI1-RX1P HDMI1-RX1N HDMI1-RX1N DAT1A- HDMI1_RX0P HDMI1-RX0P HDMI1-RX1N D1017 DATA0+ NC/TPD1E10B09 DATA0 SHIELD HDMI1_RX0N - ESD-TVS 5V 0.5PF DFN-10 H DMI...
  • Page 45 J605 I2C Interface Filter TUNER_3.3V DTMB Tuner_SCL I2C_SCL 100R Tuner_SDA I2C_SDA I2C_SCL 100R I2C_SDA BAV99 120PF 75 ohm line 33pF 33pF Addr 0xF6 RF_IN - filter noise from demod side CT10 J604 100pf/50v 6.8nH Close R842 IFAGC Circuit TUNER_3.3V 1.8P GZ1005D102CTF CT9 1000PF R103...
  • Page 46 WIFI USB Interface RU50 nc/0R BT_WAKE RU49 WIFI_WAKE CN20 RU38 WIFI_RESET WAKE +5V_WIFI WIFI-RESET USB2_D- +5V_USB_2 LD110 +5V_WIFI USB2_D+ +5V_Standby D1030 10 -4A D1029 目 目 ： 防 防 防 防 防 防 目 防 防 太 太 NC/TPD1E10B09 t r a c e NC/TPD1E10B09 C1329 USB_WIFI...
  • Page 47 PCMCIA CARD DETECT +5V_Standby +5V_PCMCIA P1101 PCMCIA_CNT R1118 R1119 PCM_CD1_N PCM_D3 CD1# TS0_D3 PCM_D4 PCM_CD1_N PCM_CD_N R1120 MDO3 TS0_D4 PCM_D5 MDO4 C1311 TS0_D5 PCM_D6 PCM_CD2_N R1122 R1123 C1107 MDO5 TS0_D6 PCM_D7 100K MDO6 TS0_D7 PCM_CE_N NC/33pf MDO7 CE1# PCM_A10 CE2# PCM_OE_N VS1# PCM_IORD_N...
  • Page 48 Head Phone +12VAMP +12V_PWR 9108/3113(3110)/2113 贴 贴 贴 贴 / 220 -500mA-0402 I=1.01A,Imax=2.6A EC903 PH_L LD108 10 -4A EARPHONE_OUTL J603 +12VAMP 耳 耳 耳 / Φ3.5 ， ， 三 三 ， 孔 孔 孔 2 .5 ， 带 带 带 ， 粉 粉 ， 卧 卧 贴...
  • Page 49 MStar China (ShenZhen) Limited MStar China (ShenZhen) Limited MStar China (ShenZhen) Limited Title Title Title MSD6886NQH MSD6886NQH MSD6886NQH Size Size Size Document Number Document Number Document Number R e v R e v R e v Custom Custom Custom <RevCode> <RevCode>...

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