While you wait for answers, we may have found some information which could help you.
Click here for Sony Str ProtectHow to increase audio output/Sony Amplifier TA-AV601?
How can I fix my old sony reciever?
how can i solve my sony str de-475 in protect mode ?
How to get cd playing with sound on Sony MIni HI_FI Model DHC_ZX50MD?
my sony cmt-spz90db micro system will not tune to radio?
replacement aerial for DAB Radio?