I had a Sansui amplifier years back with the same protection circuit
and it did the same thing, it looks for a short across the speaker
terminals after you switch on, if all ok the light goes off.



On Sun, 9 May 2010 06:57:21 -0700 (PDT), Brasto
wrote:

I have a Sansui AU-D55X amplifier which when pressing POWER-ON shows a
RED Flashing light labelled Protection.
The light will flash aprox 10 times in 5 seconds before the speakers
are switched on and sound is heard.
The Amplifier performs flawlessly in all functions and outputs
selected.
I just donot know whether such a delayed start is normal or not, more
over as the original owner stated that it behaved that way since day
one....

I like the idea of ...If it ain't broken, do not fix it, I have no
Operating Instructions so I am not sure.....it could be a self test?