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LCD Television 

Service Manual 

 

 

 

 

 

 

     

 

Chassis：

 

NT72671 

 

 

 

 

Version:    V 1.0 

        Hisense Visual Technology Co.

，

Ltd. 

          December 2, 2020 

 

 

 

Содержание NT72671

Страница 1: ...LCDTelevision Service Manual Chassis NT72671 Version V 1 0 Hisense Visual Technology Co Ltd December 2 2020...

Страница 2: ...2 REVISION HISTORY Version Revise content Reviser Date V1 00 First issued Zhangxue 2020 12 4...

Страница 3: ...ctory OSD Menu 19 4 Software Upgrading 25 4 1 USB Upgrade 25 4 2 Novatek Tool upgrading 27 5 Trouble shooting 30 5 1 Troubleshooting for Remote Control 30 5 2 Troubleshooting for Function Key 31 5 3 T...

Страница 4: ...ve methods of performing service operations Some of these service operations require the use of tools specially designed for the purpose The special tools should be used when and as recommended It is...

Страница 5: ...from RCA Hisense Eassumes no liability express or implied arising out of any unauthorized modification of design Servicetech assumes all liability 1 1 2 All ICs and many other semiconductors are susce...

Страница 6: ...iginal condition In addition prior to closing set check that Note All wire harnesses and flex cables are properly routed and secured with factory tape and or mounted cable clamps All cables and connec...

Страница 7: ...damaged or if the connector is loose do not use the product otherwise this can lead to fire or electric shock 8 If the power connector or the connector of the power cable becomes dirty or dusty wipe i...

Страница 8: ...e power supply block it can result in electric shock or may trip the main circuit breaker When installing the LCD module in and removing it from the packing carton be sure to have at least two persons...

Страница 9: ...emoved for servicing purposes have all been returned to their proper locations in accordance with the original setup The lightning flash with arrowhead symbol within an equilateral triangle is intende...

Страница 10: ...10 2 TV boards 2 1 Main board layout 2 1 1 The top of main board RSAG7 820 10588 ROH...

Страница 11: ...11 NT72671...

Страница 12: ...terminal Pin definition Pin definition 1 GND 1 GND 2 BL_EN SW 2 BL_EN SW1 3 DIMMING2 PWM2 3 DIMMING2 DIM1 4 DIMMING PWM 4 DIMMING PWM1 5 VCC_A 5 VCC_A VCCA1 6 GND 6 GND 7 VCC_A 7 VCC_A VCCA1 8 GND 8 G...

Страница 13: ...E 5 X0B_YCLK 63 LC 6 X0B_LC 62 YDIO1 7 YDIO1 61 GND 8 GND 60 P2P12N 9 X0B_1P 59 P2P12P 10 X0B_1N 58 GND 11 GND 57 P2P11N 12 X0B_2P 56 P2P11P 13 X0B_2N 55 GND 14 GND 54 P2P10N 15 X0B_3P 53 P2P10P 16 X0...

Страница 14: ...18 GND 51 GND 17 NC 52 T_nWR 16 S_SCL I2C_CLK 53 T_SCL 15 S_SDA I2C_DATE 54 T_SDA 14 GND Ground 55 GND 13 GND Ground 56 GND 12 GND Ground 57 GND 11 GND Ground 58 GND 10 GND Ground 59 GND 9 NC No Conn...

Страница 15: ...t speaker positive wire 2 L Left speaker negative wire 3 R right speaker negative wire 4 R Right speaker positive wire 2 3 Ties clamps and tapes to show the positions where ties and clamps and tapes s...

Страница 16: ...16 2 2 TV boards part list Main board Boards function difference Main chassis type For Series RSAG7 820 10588 RO H 1 Lateral terminal and vertical terminal 2 TCON part on the board NT72671 50A683FEVS...

Страница 17: ...17 3 Factory Service OSD Menu and Adjustment 3 1 Remote Control...

Страница 18: ...18...

Страница 19: ...19 3 2 Factory OSD Menu figure 1...

Страница 20: ...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 HE55A7000EUWTS for examp...

Страница 21: ...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...

Страница 22: ...l 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 Version Software Versio...

Страница 23: ...23 Channel init huangdao old Qing Dao TV Produce signal preset during the factory produce using huangdao new...

Страница 24: ...can write HDCP2 2 If HDCP key code lost you can write Netflix If Netflix key code lost you can write Widevine If Widevine key code lost you can write Note The Factory menu may be have difference for...

Страница 25: ...upgrading status c Waiting TV is trying to load the software and it will spend about 2 minutes After that UPGRADING SOFTWARE PLEASE DO NOT TURN OFF will be displayed and upgrade process bar will indic...

Страница 26: ...26 Firgure 1 Upgrading software Firgure 1...

Страница 27: ...burn the Mboot program the EMMC flash first then USB disk to upgrade the usb_NOVATEK_DEV_EU bin file Hardware connecting Connect the unit to your pc with Hisense USB serial port cable USB port connec...

Страница 28: ...ata 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 for bebug board If your PC is...

Страница 29: ...power on 3 SecureCR tool print information can appear or not How to distribute the three status 1 appearing N62020_A32_SEC that meaning is in Mboot status 2 Rolling many informmation automatically tha...

Страница 30: ...ote Control Remote control does not work Try new batteries Replace RC Check IR receiver Change Led IR board Change Led IR cable Replace main board Replace battery Replace remote control Replace Led IR...

Страница 31: ...or Function Key Buttons does not work Check switches Check key board Check Key BD cable Change Key BD cable Replace main board Check solder connections and see if any switches are stuck Replace Key BD...

Страница 32: ...NO Check Power Cord Only one works Replace Main BD Try Power on by RC and Button Neither works Both Work Power on OK YES NO Replace Power BD YES NO RED No light Panel Bright NO Replace Main BD NO YES...

Страница 33: ...4 Troubleshooting for Audio No sound Check connecter Check speaker wire Replace main board Reconnect Replace speaker wire YES YES NO NO Check speaker set Replace speaker set YES NO OK YES Power Supply...

Страница 34: ...Troubleshooting for TV VGA HDMI input No picture on the screen Check Signal Source Check connect Check cable Replace main board Make sure signal source is available Reconnect Replace cable NO YES YES...

Страница 35: ...Troubleshooting for YPbPr input No picture on the screen Check Source work or not Check connect Check Wires Green Blue Red Replace main board Check Source Device Reconnect Replace wires NO YES YES NO...

Страница 36: ...7 Troubleshooting for Video input No picture on the screen Check Source work or not Check connect Check Cable Wires Replace main board Check Signal Source Reconnect Replace Cable Wires NO YES YES NO Y...

Страница 37: ...37 6 Signals Block Diagram power assign schematic diagram...

Страница 38: ...38...

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