Need Help About Speaker Relay!

tommy1 · 6th February 2010, 12:25 AM

Thank you for relying.
What I mean was "can the relay kick on if the OUTPUT TRANSISTORS WERE TAKEN OUT OF THE CIRCUIT BOARD?"

Without the OUTPUT ...C: 33 Volts, Bass: 32 Volts, E: 0 Volts. When I put the OUTPUT back in the circuit board
then the Bass turns to be zero Volts ????
Last edited by tommy1; Yesterday at 09:54 PM.

kevvywevvywoo · 6th February 2010, 12:33 AM

It all depends on how the relay is driven. Different designs drive them in different ways. Most pro amps do a self-check before firing the relay, checking for alsorts of errors. I wouldnt power the amp up without transistors in anyway, it might cause heavy currents through other parts of the circuit, drivers etc

tommy1 · 6th February 2010, 12:40 AM

Thank you Kev,

tommy1 · 6th February 2010, 05:30 AM

Hi Kev,
Everything is fine , now. Except the relay, it won't kick on.
I found there is ac IC C1237, and I think it is broken.

6th February 2010, 12:25 AM	#1
tommy1 diyAudio Member Join Date: Jan 2010	Need Help About Speaker Relay! Thank you for relying. What I mean was "can the relay kick on if the OUTPUT TRANSISTORS WERE TAKEN OUT OF THE CIRCUIT BOARD?" Without the OUTPUT ...C: 33 Volts, Bass: 32 Volts, E: 0 Volts. When I put the OUTPUT back in the circuit board then the Bass turns to be zero Volts ???? Last edited by tommy1; Yesterday at 09:54 PM.

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6th February 2010, 12:33 AM	#2
kevvywevvywoo diyAudio Member Join Date: Aug 2008	It all depends on how the relay is driven. Different designs drive them in different ways. Most pro amps do a self-check before firing the relay, checking for alsorts of errors. I wouldnt power the amp up without transistors in anyway, it might cause heavy currents through other parts of the circuit, drivers etc

6th February 2010, 12:40 AM	#3
tommy1 diyAudio Member Join Date: Jan 2010	Thank you Kev,

6th February 2010, 05:30 AM	#4
tommy1 diyAudio Member Join Date: Jan 2010	Hi Kev, Everything is fine , now. Except the relay, it won't kick on. I found there is ac IC C1237, and I think it is broken.

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