Instruction Manual for Hisense models including: Chassis NT72690, NT72690 LCD Television, NT72690, LCD Television, Television
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DocumentDocumentLCD Television Service Manual Chassis NT72690 Version: V 1.0 Hisense Visual Technology Co.Ltd. Jan 29, 2023 Version REVISION HISTORY Revise content Reviser Date V1.00 First issued Lixiantao 2023-01-29 - 2 - 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 ................................................................................................................................- 16 - 3. Factory/Service OSD Menu and Adjustment..................................................................................................- 18 3.1 Remote Control.....................................................................................................................................- 18 3.2 Factory OSD Menu...............................................................................................................................- 19 - 4. Software Upgrading........................................................................................................................................- 25 4.1 USB Upgrade........................................................................................................................................- 25 4.2 Novatek Tool upgrading .......................................................................................................................- 27 - 5. Trouble shooting .............................................................................................................................................- 31 5.1 Troubleshooting for Remote Control ....................................................................................................- 31 5.2 Troubleshooting for Function Key........................................................................................................- 32 5.3 TV won't Power On..............................................................................................................................- 33 5.4 Troubleshooting for Audio....................................................................................................................- 34 5.5 Troubleshooting for TV/VGA/HDMI input..........................................................................................- 35 5.6 Troubleshooting for YPbPr input..........................................................................................................- 36 5.7 Troubleshooting for Video input...........................................................................................................- 37 - 6. Signals Block Diagram & power assign & schematic diagram ......................................................................- 38 - - 3 - Service Manual 1. Precautions and notices BEFORE SERVICING THE LCD TV, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. USE ONLY MANUFACTURER SPECIFIED REPLACEMENT PARTS WHEN SERVICING. 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. The special tools should be used when and as recommended. It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may damage the equipment and pose risk of personal injury . It is also important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. Service should only be performed by an experienced electronics - 4 - techician trained in the proper Television safety and service methods and procedures Hereafter throughout this manual. 1.1 Warning 1.1.1 Critical components having special safety characteristics are identified with a by the 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. Servicetech assumes all liability. 1.1.2. All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, be sure to use anti-static table mats and properly use a grounding wrist stra. Keep components and tools also at this same potential. IMPORTANT: Always disconnect the power cord from AC outlet before replacing parts or modules. 1.1.3 To prevent electrical shock, use only a properly grounded 3 prong outlet or extension cord. - 5 - 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. 1.1.5 Safety regulations require that after a repair the set must be returned in its original 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 connectors are properly insulated and do not have any bare wires/lead exposed 1.1.6 (1) Do not supply a voltage higher than that specified to this product. This may damage the product and may cause a fire. (2) Do not use this product: > High humidity areas > In an area where any water could enter or splash into the unit. High humidity and water could damage the product and cause fire. - 6 - (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. Continuing to use the product, it may cause fire or electric shock. (5) Do not pull out or insert the power cable from/to an outlet with wet hands. It may cause electric shock. (6) Do not damage or modify the power cable. It may cause fire or electric shock. (7) If the power cable is 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 it with a dry cloth. Otherwise, this can lead to fire. (9) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over 1.2 Notes Notes on Safe Handling of the LCD panel and during service The work procedures shown with the Note indication are important for ensuring the safety of the product and the servicing work. Be sure to follow these instructions. · Before starting the work, secure a sufficient working space. - 7 - · 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. Especially when installing and removing the power board, start servicing at least 2 minutes after the main power has been turned off. · While the main power is on, do not touch any parts or circuits other than the ones specified. If any connection other than the one specified is made between the measuring equipment and the high voltage 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 perform the work. · When the surface of the panel comes into contact with the cushioning materials, be sure to confirm that there is no foreign matter on top of the cushioning materials before the surface of the panel comes into contact with the cushioning materials. Failure to observe this precaution may result in, the surface of the panel being scratched by foreign matter. · Be sure to handle the circuit board by holding the large parts as the heat sink or transformer. Failure to observe this precaution may result in the occurrence of an abnormality in the soldered areas. · Do not stack the circuit boards. Failure to observe this precaution may result in - 8 - 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. The lightning flash with arrowhead symbol, within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock. The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature. . - 9 - 2. TV boards: 2.1 Main board layout 2.1.1 The top of main board (RSAG2.908.12913-01\ROH) - 10 - - 11 - - 12 - 2.2 Wiring diagram( example for 32A33EXVT): (TCON) 60pin miniLVDS Wifi TCON + USB1 USB2 HDMI1 HDMI2 AV Tuner Wlan XP100260pin miniLVDS jacket Panel terminal jacket definition Pin definition illustration 1 NC 2 GND 3 NC 4 NC 5 NC 6 NC 7 NC 8 NC 9 GND NC GND NC NC NC NC NC NC GND Main board terminal jacket definition Pin Config 1 NC 2 GND 3 MLVF5N 4 MLVF5P 5 MLVF4N 6 MLVF4P 7 MLVF3N 8 MLVF3N 9 GND - 13 - 10 MLVFCLKN 11 MLVFCLKP 12 GND 13 MLVF2N 14 MLVF2P 15 MLVF1N 16 MLVF1P 17 MLVF0N 18 MLVF0N 19 GND 20 NC 21 I2C WP 22 I2C SDA 23 I2C SCL 24 GND 25 NC 26 NC 27 VCC 28 VCC 29 NC 30 GND 31 HAVDD 32 HAVDD 33 AVDD 34 AVDD 35 AVDD 36 NC 37 NC 38 GND 39 GND 40 NC 41 XPOL 42 XSTB 43 GND 44 VSSG 45 VSSQ 46 LC2 47 LC1 48 NC 49 ST 50 GND MLVFCLKN 10 MLVFCLKP 11 GND 12 MLVF2N 13 MLVF2P 14 MLVF1N 15 MLVF1P 16 MLVF0N 17 MLVF0N 18 GND 19 NC 20 I2C WP 21 I2C SDA 22 I2C SCL 23 GND 24 NC 25 NC 26 VCC 27 VCC 28 NC 29 GND 30 HAVDD 31 HAVDD 32 AVDD 33 AVDD 34 AVDD 35 NC 36 NC 37 GND 38 GND 39 NC 40 XPOL 41 XSTB 42 GND 43 VSSG 44 VSSQ 45 LC2 46 LC1 47 NC 48 ST 49 GND 50 - 14 - MLVFCLKN MLVFCLKP GND MLVF2N MLVF2P MLVF1N MLVF1P MLVF0N MLVF0N GND NC WP_X SDA_S SCL_S GND NC NC VDDD VDDD NC GND HAVDD HAVDD AVDD AVDD AVDD NC NC GND GND NC POL TP GND VSSG VSSQ LC2 LC1 NC STV GND 51 52 53 54 55 56 57 58 59 60 XP7Speaker jacket VGHD HC8 HC7 HC6 HC5 HC4 HC3 HC2 HC1 NC VGHD 51 HC8 52 HC7 53 HC6 54 HC5 55 HC4 56 HC3 57 HC2 58 HC1 59 NC 60 VGHD CLK8 CLK7 CLK6 CLK5 CLK4 CLK3 CLK2 CLK1 NC Pin definition illustration Wire color 1 L+ Left 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 should be, for checking after servicing, Before disassemble the TV ,besure to take photes for the TV assembly example for 32A33EXVT. - 15 - 2.2 TV boards part list Main board Boards function difference RSAG2.908.12913-01\ ROH 1. Lateral terminal and vertical terminal. 2. TCON part on the board. Main chassis type NT72690 For Series 32A33EXVT - 16 - - 17 - 3. Factory/Service OSD Menu and Adjustment 3.1 Remote Control - 18 - 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 32A33EXVT for example. - 19 - Options: Write keys: - 20 - 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 - Factory menu White Balance channel init Option Clear all Soft version Menu Version MAC Adr HDCP2.2 key ESN WIDEVINE key Service No. Description White Balance data adjusting, different source has different WB values. Before adjusting, please change to desired source. Remark TV Produce signal preset, during the factory produce using. Items can choose initial the TVEEPROM reset current software version information Software Version information MAC address information The TV's electronic Serial number WIDEVINE key code LTDNXXXXXXY-P0001 - 22 - Channel init huangdao old Qing Dao huangdao new ...... TV Produce signal preset, during the factory produce using. - 23 - Option Write keys ToFAC M/U Clear All Region country Logo Language VCOM UART PQ COM CI+ MAC HDCP2.2 Netflix "M" used in factory product. "U" used in user state. Emerging Country choose Customer logo choose Language choose Panel voltage, On/off (when choose "on" then can serial port connect with Tool successfully) On/off If MAC key code lost, you can write. If Netflix key code lost, you can write . - 24 - Widevine If Widevine key code lost, you can write . 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. To clean the EEPROM: a. Select the item "Option"--"Clear all" in Factory mode. b. Press button to clear the EEPROM data. c. Close the OSD menu after 5 seconds. d. Restart the TV. e Also the Keys information must been checked, if appear "NG", then must rewrite key code. 4. Software Upgrading 4.1 USB Upgrade Main software upgrade directly with USB The main software can be upgraded with USB disk. It includes two modes: user mode factory mode. Take 32A33EXVT for example. 4.1.1 TV in user mode a. Decompress NOVATEK_72690_EU_2K_pkg_ YYYYMMDD.tar.gz (YYYYMMDD is the year/month/day when the software is being built, such as NOVATEK_72690_EU_2K_pkg_20230129.tar.gz) and copy usb_NOVATEK_DEV_EU.bin file to the USB root directory. Please make sure the USB disk format is Fat32 and there are no other "*.bin" files in the root directory of USB disk . b. AC power off the TV, insert the USB disk to the USB 2.0 port, TV in standby status,next long press the "power key . If "Loading data......" is shown on TV, it means TV successfully enters 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 indicate the progress. It needs about s5 minutes to complete the whole software upgrade. d. After upgrade, TV can automatically reboot. e. Enter the Factory OSD Menu to check the main software version, and then choose "option""Clear All" to do clean up. 4.1.2 TV in factory mode a. If TV is in Factory mode, only have difference from chapter 4.1.1 b. as following. others are same. b. TV is in factory mode, only AC power off TV and insert the USB disk, next AC power on, TV can identify - 25 - 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. Firgure-1: Upgrading software - 26 - Firgure-1 4.2 Novatek Tool upgrading If USB upgrades failure, TV crashed and SecureCRT no print message. Repairer must read IC device ID code decipher& burn the Mboot program the EMMC flash first. then USB disk to upgrade the "NOVATEK_72690_EU_2K_NOVATEK_ICCOPY_emmc_HD2K-HIS_20230129.tar.gz"file. 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 - 4.2.1 Open the UART serial option UAR serial choose "on " Menu: Factory-->Options>UART>on - 28 - 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. This is a drive software of Mstar PL2303_Prolific_D SecureCRTPortab riverInstaller_v1160.exe le.rar - 29 - Another: If your PC is Win7 system, you will have to install PL2303_Prolific_DriverInstaller_v1160 fileand 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. 3) SecureCR tool print information can appear or not. How to distribute the three status? 1) appearing "N62501_EMMC_SEC>" that meaning is in Mboot status; 2) Rolling many informmation automatically that meaning is in Supernova status; 3) No any print information that meaning the eMMC of board is no program. Stop board serial with SecureCRT 1) In Mboot status: N62501_EMMC_SEC> Input "shift" and "~" key to ensure, then close the SecureCRT window. 2) If no any print information with SecureCRT,then can directly close the SecureCRT window. - 30 - 5. Trouble shooting 5.1 Troubleshooting for Remote Control Remote control does not work Try new batteries NO Replace RC YES Replace battery YES Replace remote control Check IR receiver Change Led & IR board NO Change Led & IR cable NO Replace main board YES Replace Led & IR BD YES Replace Led & IR cable - 31 - 5.2 Troubleshooting for Function Key Buttons does not work Check switches NO Check key board NO Check Key BD cable Change Key BD NO Replace main board YES Check solder connections and see if any switches are stuck. YES Replace Key BD YES OK - 32 - 5.3 TV won't Power On TV won't power on Is LED NO light? YES No light RED Panel Bright NO YES Check signal Source YES NO Replace Main BD NO YES Replace Panel (to contact Hisense tech support.) OK Check Power Output NO YES Make Sure Power source is live Check Cord Power YES Replace Power Cord NO Try Power on by Only one works RC and Button Check/replace IR BD or Keypad PCA Neither works Replace Main BD Both Work Power on YES OK NO Replace Power BD Notice: NT72690 AU market TV work normally indication led is no light. TV standby indication led is red. - 33 - 5.4 Troubleshooting for Audio No sound Check connecter NO Check speaker wire NO Check speaker set NO Replace main board Power Supply Board YES Reconnect YES Replace speaker wire YES Replace speaker set YES OK - 34 - 5.5 Troubleshooting for TV/VGA/HDMI input No picture on the screen Check Signal Source NO Make sure signal source is available Check connect NO Check cable NO Replace main board YES Reconnect YES Replace cable - 35 - 5.6 Troubleshooting for YPbPr input No picture on the screen Check Source work or not YES Check connect NO Check Wires (Green Blue, Red) NO Check Source Device YES Reconnect YES Replace wires NO Replace main board - 36 - 5.7 Troubleshooting for Video input No picture on the screen Check Source work or not YES Check connect NO Check Cable/ Wires NO Replace main board NO Check Signal Source YES Reconnect YES Replace Cable/Wires - 37 - 6. Signals Block Diagram & power assign & schematic diagram - 38 - - 39 -Microsoft: Print To PDF