Hello ,
suddenly the dec began an unusual behavior
first with digital terrestrial channels and then with satellite.
after about half an hour the image starts to block then starts again and so on. I thought they were channels that are not well received but it is not so because attacking the other my dec and verifying the signals with the antennist are all good.
I do not understand if it's a power problem

Most probably the capacitors from the PSU are becoming old and doesn't give enough anymore...

Look here, it's good to replace these capacitors by high quality Rubyconn 105° ones.

http://www.ourdreambox.com/ubbthreads.php?ubb=showflat&Number=1606#Post1606

Admin

thanks
but the scheme of where these capacitors are located where I can find them

You can find them with the ID printed on the PCB of the PSU,

Change the small electrolytic caps under HS1 (heat sink1) and C6 just above.

C36 = 100 microF 25V - 105°
C31 = 10microF 50V - 105°
C38 = 1microF 50V - 105°
C23 = 47microF 25 - 105°
C6 = 1 microF 50V - 105°

Admin

Item is ETXEZ654M7F but the abbreviations of the capacitors shown above I can not find on the card there are other numbers

Take a photo of the PSU (Power Supply) board, and post here,

TS

Check also with Johnny from jb8a8f8.com, our Hardware Guru,

https://jb8a8f8.com/support/index.php?threads/dm7025-not-switching.236/

Admin

Photo

It's the same PSU as for DM8000HD, please check with johnny from jb8a8f8.com, and your box is then most probably a DM7025+,

Admin

check from jb8a8f8.com but if so, can not the capacitor change be applied?