Wednesday, November 18, 2015

AOC LE39D1440/20 SERVICE MODE AND POWER SUPPLY CIRCUIT

AOC LE39D1440/20 

SERVICE MODE AND POWER SUPPLY CIRCUIT 

Firmware Instruction
Step 1: Ready for F/W Upgrade
1.1 Change the software file name to “
install.img”.
1.2 Prepare a USB memory. Copy the file “
install.img” from your computer to the USB memory root directory, and
remove it from computer’s USB port.
Step 2: F/W Upgrade
2.1 Insert USB flash disk into TV’S USB
2.2 AC on the TV, the indicator light will shine after about tens of seconds, and the software will update automatically.
TV will auto restart after update the software.
2.3 After restart, press “menu+1999+back” keys in remote control into the factory menu. Check the version of MCU, and restart, software update is completed.
SERVICE MODE
Press "Menu +1+9+9+9+ Back" into the factory mode
Adjustment
White Balance Adjustment
1. In Component signal mode, Signal generator will select Tim 314, Pattern 141(80% White);
2. ENTER TO SERVICE MODE
3. Move the cursor to Current Source and choose component; Move the cursor to Color temp and choose color
temp(Cool, Normal, Warm), Move the cursor to the Gain and adjust RGB parameters to make the color temperature value within the cool color temperature specifications.
TROUBLE SHOOTING
No power
Power board output=5V? >Replace the power board
Check the IR board and LED
Replace the IR board
Replace the main board
Abnormal display
Enter factory mode to do “EEPROM initial”&“Reset”
Check the main board
Check the LVDS cable
Check the panel
Sound problem
Check the TV is muted, adjust the volume or enter the menu to reset?
Enter factory mode to do “Reset”
Check the speaker resistance value is in spec (Remark: The value is marked on the speaker)?
POWER ON PROBLEM
Power board output12/24V?
Check the power key is under control?
Check the IR receiver is normal?
POWER SUPPLY CIRCUIT 
CLICK ON THE IMAGES TO ZOOM IN