Led driver Hantek DSO5202P

anton0456

Hello! Couple years ago bought this scope. Now screen is blinks and half screen not lighting. Half leds in screen not working. And led driver on max brightness not working correctly. Led driver chip is uknown. Google doesn't know about this chip. I can buy leds, but i can't buy led driver. Can anybody say, what chip is using there? Or where i can buy new display?

amy

Sir, please send a message to me caiyijun@hantek.com

anton0456

Firmware doesn't slove the problem.

amy

Sir, please use the two firmwares to update.


Can one of them improve the screen flash problems?
Please tell me the result.

amy

Sir, please press "Utility->System information" and give us the sw version to study.

anton0456

The display has 15 LEDs. Five lines of 3 serial connected LEDs. Each LED consumes 30mA. Total result is 150mA. The maximum voltage that leddriver gives is -10.8V. To get a current of 150mA, we need to apply Ohm's law, which says: R = U / I. We substitute our values into the formula and get R = 10.8 / 0.15 = 72 Ohm. Disconnect the LEDs from the board and replace them with a 72 Ohm resistor. Measure the voltage across the resistor. Up to 9V, the voltage behaves normally, after 9V it starts to jump. Conclusion. It broke not only the light in the display, but the LedDriver installed on the "LCD Adapter" board. It's easy.

I just need to know what is LEDDRiver chip installed on "LCD ADAPTER" board. Or where I can buy this board. That's all.

amy

Sorry, I can't understand.
Which one LED?

anton0456

Instead of LEDs, I connected a resistance of 70 Ohms and measured the voltage - continues to jump, as with LEDs

amy

Sir, please tell how you make sure that the LED driver is broken.

anton0456

OK, but where is "LCD Adapter"? Led driver is broken too.