keskiviikko 26. kesäkuuta 2019

Inside another DVR


Our older top-set box/DVR unit was replaced actually long time ago now and this old unit has been sitting on my desk for a while now. Although I expected it to be as boring insides as previous one I opened, I decided to see what's inside it too.

And surprise surprise, it is as boring as I expected.


On top are rear connectors, from left to right power (black one), ethernet/USB, scart, HDMI, audio out, SPDIF and TV antenna in/out.

Under the heat sink is processor. I didn't feel like taking heat sink out; underneath there's very likely another MediaTek all-in-one media processor. And supporting chips around the board.

Curiously board has been divided to squared in silk screen print; from this view it's bit difficult to see but it's there, labeled A-D on vertical and 1-6 on horizontal. At least A and B can be seen at the right edge of the board. My guess is that this is for rework for (machine) visual inspection; "component 6042 missing at B2" or some such. Not something you see often.

Power button, led, front USB and IR reception are on smaller daughter board at the bottom, sitting above main board in a slight angle. I just wonder why they decided to use two cables to connect it to main board, instead of just one a bit wider flex, as other cable adds a bit to BOM price.

But on that daughter board is the most interesting part of this device; CC2533, which is Zigbee RF one-chip remove control solution. Not used, unfortunately, the remote that came with this is usual IR based one.

And nothing much more. Ah well, to trash - well, recycling - this goes.


Ei kommentteja:

Lähetä kommentti