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Hisense NT72690 Service Manual
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Hisense NT72690 Service Manual

Hisense NT72690 Service Manual

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LCD Television
Service Manual
Chassis： NT72690
Version: V 1.0
Hisense Visual Technology Co.，Ltd.
Jan 29, 2023

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Summary of Contents for Hisense NT72690

  • Page 1 LCD Television Service Manual Chassis： NT72690 Version: V 1.0 Hisense Visual Technology Co.，Ltd. Jan 29, 2023...
  • Page 2 REVISION HISTORY Version Revise content Reviser Date V1.00 First issued Lixiantao 2023-01-29 - 2 -...
  • Page 3 Contents Contents ..................................- 3 - Service Manual ................................- 4 - 1. Precautions and notices ............................. - 4 - 1.1 Warning ..............................- 5 - 1.2 Notes ............................... - 7 - 2. TV boards: ..............................- 10 - 2.1 Main board layout ..........................- 10 - 2.2 TV boards part list ..........................
  • Page 4 USE OF NON-AUTHORIZED PARTS WILL VOID THE MANUFACTURE'S WARRANTY Proper service and repair is important to the safe, reliable operation of all Hisense Equipment. The service procedures recommended by Hisense and described in this Service Guide are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose.
  • Page 5 Ref. No. in the parts list. Use of non-manufacturer's recommended parts may create shock, fire, or other hazards. Under no circumstances should the original design be modified or altered without written permission from RCA. Hisense Eassumes no liability, express or implied, arising out of any unauthorized modification of design.
  • Page 6 1.1.4 When replacement parts are required, be sure to use replacement parts specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards and will void the manufacturer's warranty.
  • Page 7 (3) If a foreign substance (such as water, metal, or liquid) gets inside the panel module, immediately turn off the power. Continuing to use the product may cause fire or electric shock. (4) If the product emits smoke, and abnormal smell, or makes an abnormal sound, immediately turn off the power.
  • Page 8 • At all times other than when adjusting and checking the product, be sure to turn OFF the POWER Button and disconnect the power cable from the power source of the TV during servicing. • To prevent electric shock and breakage of PC board, start the servicing work at least 30 seconds after the main power has been turned off.
  • Page 9 problems resulting from scratches on the parts, the deformation of parts, and short-circuits due to residual electric charge. • Perform a safety check when servicing is completed. Verify that the peripherals of the serviced points have not undergone any deterioration during servicing. Also verify that the screws, parts and cables removed for servicing purposes have all been returned to their proper locations in accordance with the original setup.
  • Page 10 2. TV boards: 2.1 Main board layout 2.1.1 The top of main board (RSAG2.908.12913-01\ROH) - 10 -...
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  • Page 13 2.2 Wiring diagram ( example for 32A33EXVT): 面板驱动(TCON) 光纤 内置TCON USB1 USB2 电源板 HDMI1 HDMI2 主板 机内 插座 耳机 Tuner Wlan Wifi 遥控+指示灯 按键 扬声器 扬声器 XP1002：60pin miniLVDS jacket Panel terminal jacket definition Main board terminal jacket definition Config illustration definition MLVF5N MLVF5P...
  • Page 14 MLVFCLKN MLVFCLKN MLVFCLKN MLVFCLKP MLVFCLKP MLVFCLKP MLVF2N MLVF2N MLVF2N MLVF2P MLVF2P MLVF2P MLVF1N MLVF1N MLVF1N MLVF1P MLVF1P MLVF1P MLVF0N MLVF0N MLVF0N MLVF0N MLVF0N MLVF0N I2C WP I2C WP WP_X I2C SDA I2C SDA SDA_S I2C SCL I2C SCL SCL_S VDDD VDDD HAVDD HAVDD...
  • Page 15 VGHD VGHD VGHD CLK8 CLK7 CLK6 CLK5 CLK4 CLK3 CLK2 CLK1 XP7：Speaker jacket illustration definition Wire color 黑 Left speaker positive wire 白 Left speaker negative wire 白 right speaker negative wire 红 Right speaker positive wire Ties,clamps and tapes: to show the positions where ties and clamps and tapes should be, for checking after servicing, Before disassemble the TV ,besure to take photes for the TV assembly example for 32A33EXVT.
  • Page 16 2.2 TV boards part list Main board Boards function difference For Series Main chassis type 32A33EXVT 1. Lateral terminal and vertical terminal. NT72690 RSAG2.908.12913-01\ 2. TCON part on the board. - 16 -...
  • Page 17 - 17 -...
  • Page 18 3. Factory/Service OSD Menu and Adjustment 3.1 Remote Control - 18 -...
  • Page 19 3.2 Factory OSD Menu figure -1 Factory OSD menu list: if you want to learn more about TV, you’d better read it but would not adjust the value please. The Factory menu may be have difference for diverse market and customer. Take for example.
  • Page 20 Options: Write keys: - 20 -...
  • Page 21 Note: Check whether the Key information under the current Version is OK, if appears “NG” or such as following red surround irregular information then need rewrite the key. - 21 -...
  • Page 22 Factory menu Remark Description White Balance data adjusting, different source White Balance has different WB values. Before adjusting, please change to desired source. channel init TV Produce signal preset, during the factory produce using. Option Items can choose Clear all initial the TV，EEPROM reset Soft version current software version information...
  • Page 23 Channel init huangdao old Qing Dao TV Produce signal preset, during the factory produce using. huangdao new …… - 23 -...
  • Page 24 "M" used in factory product. Option ToFAC "U" used in user state. Clear All Region Emerging country Country choose Logo Customer logo choose Language Language choose VCOM Panel voltage, UART On/off (when choose "on" then can serial port connect with Tool successfully) On/off PQ COM If MAC key code lost, you can write.
  • Page 25 If Widevine key code lost, you can write . Widevine Note: The Factory menu may be have difference for diverse market and customer, above Factory menu only for reference. The factory menu data varies according to different sources. Incase changing the factory data by error, you can choose to “Clear all”, by which you can resume the default value.
  • Page 26 automatically to update, till call up “Loading data……” interface , update process bar is 1%. 4.1.3 If the above USB upgrade methods fail, you can rename the upgrade software to usb_NOVATEK_DEV_EU.bin,next use serical “cu” to update 4.1.4 When upgrade successfully, We must ensure the TV mode of running correctly. Paths: Factory---Design –Project ID Once choose another TV mode ,must AC power off and power on the TV to reboot.
  • Page 27 ID code 、 decipher& burn the Mboot program the EMMC flash first. then USB disk to upgrade the “ ”file. NOVATEK_72690_EU_2K_NOVATEK_ICCOPY_emmc_HD2K-HIS_20230129.tar.gz Hardware connecting Connect the unit to your pc with Hisense USB-serial port cable. USB port connects to your PC and earphone port to TV’s HDMI1. As following. - 27 -...
  • Page 28 4.2.1 Open the UART serial option UAR serial choose “on “ Menu: Factory-->Options–>UART–>on - 28 -...
  • Page 29 If finish the updating and data adjust UART serial, UART choose “off “ 4.2.2 Novatek USB-serial driver It’s the same as Mstar bebug Tool. If First use Mstar bebug Tool, you have to install drive software PL2303_Prolific_DriverInstaller_v1160 for bebug board. If your PC is Windows XP system: First install SecureCRTPortable file in your PC.
  • Page 30 Another: If your PC is Win7 system, you will have to install PL2303_Prolific_DriverInstaller_v1160 file，and then open the software of SecureCRT in your PC. 4.2.3 Stop board serial connect with SecureCRT Run SecureCRT,printing information includes three status:Mboot\Supernova\no print information. Current steps: 1) Run SecureCRT.exe 2) TV power on.
  • Page 31 5. Trouble shooting 5.1 Troubleshooting for Remote Control Remote control does not work Try new batteries Replace battery Replace RC Replace remote control Check IR receiver Change Led & IR board Replace Led & IR BD Change Led & IR cable Replace Led &...
  • Page 32 5.2 Troubleshooting for Function Key Buttons does not work Check solder connections and see if Check switches any switches are stuck. Replace Key BD Check key board Check Key BD cable Change Replace main board - 32 -...
  • Page 33 Work Replace Main Replace Main BD Power on Replace Panel (to contact Hisense tech support.) Replace Power BD Notice: NT72690 AU market： TV work normally indication led is no light. TV standby indication led is red. - 33 -...
  • Page 34 5.4 Troubleshooting for Audio No sound Reconnect Check connecter Replace speaker wire Check speaker wire Replace speaker set Check speaker set Replace main board Power Supply Board - 34 -...
  • Page 35 5.5 Troubleshooting for TV/VGA/HDMI input No picture on the screen Check Signal Source Make sure signal source is available Reconnect Check connect Replace cable Check cable Replace main board - 35 -...
  • Page 36 5.6 Troubleshooting for YPbPr input No picture on the screen Check Source work or not Check Source Device Reconnect Check connect Check Wires (Green Blue, Red) Replace wires Replace main board - 36 -...
  • Page 37 5.7 Troubleshooting for Video input No picture on the screen Check Source work or not Check Signal Source Reconnect Check connect Replace Cable/Wires Check Cable/ Wires Replace main board - 37 -...
  • Page 38 6. Signals Block Diagram & power assign & schematic diagram - 38 -...
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