STK410-030D & STK411-230D

Deadly Sones · 10th March 2011, 04:35 PM

My Kenwood VR307 is going into protect. There was a popped cap and a bad resistor but I changed them and it still goes into protect.

If I pull out one or both of the STK IC's would/should I be able to power it properly without damaging anything? I know there would be no output, but just to see if the protection stops...

I have a new STK410-030D here, but I didn't want to install it if it can get damaged by the old (possibly damaged) STK411-230D. I have no problem ordering one of them too, but would like to know if there was a way to "test" by removal.

Are they independent in a sense that I can pull one at a time and test to see if it stops going into protect?

Thanks in advance for your help, you guys have SO much knowledge on this forum.

Paul B

dragonxwas · 10th March 2011, 04:42 PM

yes, you will be able to power the device, just check whether you can reset the reciver/amp if possible before resorting to repair; if you are sure that the ic itself is faulty then remove one by one and turn it on, if it turns on replace both of the ics because you will have tonal issues as one will be burnt in after countless hours of listening and the new one will sound fresh, so not to create an imbalance, replace both...

Deadly Sones · 10th March 2011, 04:50 PM

Excellent... I have them both removed right now, so I'll install the new STK410-030D, put it back together and see if it powers up properly with the STK411-230D out of circuit. If it powers up properly, I'll order a new STK410-230D just for good measures.

Thanks for your help.

Deadly Sones · 10th March 2011, 04:55 PM

I've gone over just about every component in the main board and other than the popped cap and one smoked resistor everything else seems good. Those IC's appear to be a pain to test (even after looking over the data sheets/ schematics)... the removal test seems simplest to me.

Deadly Sones · 05:39 PM

I installed the new STK410-030D, put it all back together and it fires up fine. So I'm going to order the 411-230D and replace it too. Thank you again for your help.

10th March 2011, 04:35 PM	#1
Deadly Sones diyAudio Member Join Date: Feb 2011 Location: Windsor, Ontario	STK410-030D & STK411-230D My Kenwood VR307 is going into protect. There was a popped cap and a bad resistor but I changed them and it still goes into protect. If I pull out one or both of the STK IC's would/should I be able to power it properly without damaging anything? I know there would be no output, but just to see if the protection stops... I have a new STK410-030D here, but I didn't want to install it if it can get damaged by the old (possibly damaged) STK411-230D. I have no problem ordering one of them too, but would like to know if there was a way to "test" by removal. Are they independent in a sense that I can pull one at a time and test to see if it stops going into protect? Thanks in advance for your help, you guys have SO much knowledge on this forum. Paul B

10th March 2011, 05:35 PM	#5
Deadly Sones diyAudio Member Join Date: Feb 2011 Location: Windsor, Ontario	I installed the new STK410-030D, put it all back together and it fires up fine. So I'm going to order the 411-230D and replace it too. Thank you again for your help. Last edited by Deadly Sones; 10th March 2011 at 05:39 PM.

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10th March 2011, 04:42 PM	#2
dragonxwas diyAudio Member Join Date: Feb 2010	yes, you will be able to power the device, just check whether you can reset the reciver/amp if possible before resorting to repair; if you are sure that the ic itself is faulty then remove one by one and turn it on, if it turns on replace both of the ics because you will have tonal issues as one will be burnt in after countless hours of listening and the new one will sound fresh, so not to create an imbalance, replace both...

10th March 2011, 04:50 PM	#3
Deadly Sones diyAudio Member Join Date: Feb 2011 Location: Windsor, Ontario	Excellent... I have them both removed right now, so I'll install the new STK410-030D, put it back together and see if it powers up properly with the STK411-230D out of circuit. If it powers up properly, I'll order a new STK410-230D just for good measures. Thanks for your help.

10th March 2011, 04:55 PM	#4
Deadly Sones diyAudio Member Join Date: Feb 2011 Location: Windsor, Ontario	I've gone over just about every component in the main board and other than the popped cap and one smoked resistor everything else seems good. Those IC's appear to be a pain to test (even after looking over the data sheets/ schematics)... the removal test seems simplest to me.

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