STK465 a power amp or pre+power?

[gilwe]

Is the STK465 a preamp or a power stage? I'm fixing an old Sanyo DCA303. One channel is totally dead, both via headphones and speaker out, and for all inputs, with the channel's VU meter not showing any signal. I was wondering if the STK is the actual preamp (and is probably bad) or if I should look elsewhere... thanks!

 

[Mooly]

It is a complete dual (stereo) power amp. Try comparing voltages between the pins for the two channels. Fwiw, STK's generally can and do fail although you should check all other possibilities as well.

STK465

 

[gilwe]

Thanks. There are STK465's on ebay sold for only a few bucks from Chinese suppliers. Is there a known issue of those being fakes? or, are they supposed to be inferior vs the original (sanyo) part?

1PCS POWER AMP IC MODULE SANYO SIP-16 STK465 STK-465 | eBay

 

[Mooly]

I wouldn't like to say on that I'm afraid as I've no experience at all of them in recent years.

There do seem to be some advertising originals:
STK465 "Original" SANYO 16P SIP IC 1 pc | eBay

 

[gilwe]

Thanks, it does come up that the STK is bad. With it being in the circuit, one channel doesn't look as should on my oscilloscope. With it out of circuit, pins 16 and 1 (inputs) show correct signals. I'll order one and just replace it.

 

[Mooly]

OK 🙂 Good luck.

 

[magui1]

Hi.
Several times i used "fake" STK465 from PMC (rapaired Telefunken RA100, Sony STR242, UNIVERSUM VT 23016).
"Fake" STK works good, but be carefull with more output power.