The TV is a 40" TV, brand Medion. This brand is sold in Europa by Aldi (Hofer in Austria)
and is known for its "basic" quality. I guess the price was around 250-300€ (I found an offer of 299€ for a 55" TV).
On the Medion homepage, there is no useful information for this device. No firmware files, but a store for some spare parts.
If you open the TV, there are basically 3 PCBs:
- The mainboard, marked with 17MB82S. There is a Mediatek MT5820LUNU processor, a CI slot, all the HDMI/AV/DVB-S/DVB-T stuff and the amplifier for the built-in speakers. Maybe interesting: 2x SPI Flash chips: 25Q32FVS & 25Q64FVS
- The power supply
- The LCD driver board
After some research, I found following details:
- This TV is manufactured by Vestel, it seems they are a big contract manufacturer for TVs
- You will easily find a technical manual for the 17MB82-S mainboard.
- Firmware upgrades are done by: pressing the OK button on the remote & power-on. The firmware will be loaded from a FAT32 USB flash drive.
- According to the technical manual, there are UART pins on the SCART plug: pin 18 is GND, pin 12 is RX of the CPU, pin 10 is TX of the CPU. 115200, 8N1
- Vestel's technical manuals are funny: copy & paste images from datasheets, marked as confidential
- Do not trust the manuals: there are many different revisions of boards out there
Time spent: 20h, mostly for finding infos on the internet
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