Hisense Lcd42p69p Service Manual

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
6 Software Upgrading 
The first upgrading method: 
 
The software is upgraded by a burning toll-MtkTool, which can burn the program file *.bin to the 
main board of the unit. 
6.1 Get ready for upgrading 
6.1.1 Install the driver 
 
Double click the icon 
MTKtools2.44.04+cp210xDriver.rar, install the driver. 
 
Select the default value, the driver will be installed step by step. 
 
6.1.2 Hardware connecting 
Connect the unit to your pc with a USB-to-serial port cable. USB port connects to your pc, and 
serial port to the TV’s RS232 port. 
 
USB connector: to PC. 
Serial connector: to TV’s RS232 
port. 
 
						

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
 
 
 
For the first connecting, the pc will recognize and automatically install the USB device. The 
process is just like the installation of a mini disk, see the following picture. 
 
 
 
 
 
 
						

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
 
 
6.2 Upgrading with the MtkTool 
 
    MTKtool is a green program needing no installation. It is saved in the folder 
  . There are five folders/files in this folder altergether. 
 
The MtkTool using log is restored in the MtkLog folder. It records the running time and date 
whenever the tool is used. The log will be a txt file named by the date and time. 
       
 
              After connecting the TV with your PC, double click 
icon, open the 
MtkTool. 
       If following error appears, it means the related port is not be set properly. 
       
 
              Ignore these errors, click “Confirm” and enter the MtkTool main interface, see the 
following picture. 
Flash chip model   
Please refer to follow steps to update the software: 
1—Select mode of Flash chip to MT8226 as the below picture. 
 
						

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
2—Refer to the next page instruction to select the communicate port. 
3—Press the icon beside the baud rate and make sure it is green as the below picture. 
4—Set the flash baud rate to 115200 as the below picture. 
5—Click the browse button to select the *.bin file that will be updated. 
6—Click the “start” button to update software. 
 
 
 
 
 
 
 
 
      
      
 
      
   
 
      
     
 
 
 
 
 
Select mode 
of Flash chip Communicate 
port Set Flash 
Baud Rate Select *.bin 
file  
Start upgrade
Information of upgrade 
process 
Choose the current 
USB conversion Port 
Later choose com5 
 
						

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
           
Open “Device Manager” and find which port is connected with the TV. In this operation, COM5 
is connected to the TV; so, select “COM5” in the MtkTool main interface. Select the right baud rate 
according to chip model. For this unit( chip model is MT8226), select 115200..So choose
 “Auto Set Flash 
BaudRate”
  
 
       Note: Whether or not click the “Auto Set Flash Baud Rate” in the “window” menu 
depends on the chip type. If the flash chip does not support high speed transport, do not select 
this option; otherwise, reserve the selected mood. 
                 
 
						

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
         
 
       Click “Browse” button, find the upgrading program file, and select it. Press “Upgrade” button 
and start upgrading. 
       The following interface appears on the screen, indicating upgrading successfully.   
       
 
 
 
						

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
6.3 Update with USB directly 
 T
he second update method is with USB directly: 
MTK8222 Series can update with USB, the software name should be HISENSE.bin. 
The Updating Steps is set the Source to DMP interface, insert the USB(the 
update file HISENSE.bin,which should be in root directory),The TV automatic 
identify the upgrading software. step by step according as the informations of the 
upgrading process. 
 
(USB to the Main board directly) 
 
 
						

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
 
 
 
 
  After upgrading, you must confirm the software in the Factory Menu and youd 
better CLEAR UNPROTECTLY. 
 
 
 
 
 
						

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
7. Troubleshooting 
7.1 Troubleshooting for Remote 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 BD 
Replace Led & IR cable 
YES 
YES  NO 
YES 
NO 
YES 
NO 
 
						

							 
 
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LCD TV Service Manual                         
Hisense Confidential 
7.2 Troubleshooting for Function Key   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Buttons does not work 
Check switches 
Check key board 
Check Key BD cable   
Change Key BD 
Replace main board 
Replace tact switch 
Replace Key BD 
OK 
YES 
YES  NO 
YES 
NO NO