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Old 28th May 2007, 09:03 PM   #1
Juko is offline Juko  Netherlands
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Default Cyrus 3i

Hi all,

I'm about to buy a Cyrus IIIi which gives a pop over the speakers when you turn it on. What kind of problem could this be?
And is it not to much trouble to repair it?
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Old 30th May 2007, 07:40 PM   #2
Juko is offline Juko  Netherlands
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I got the amp

Some more diagnostics:

when in standby I measure up to 7V DC on both outputs.
When turned on output DC goes down to zero.
When in standby again it develops the DC again.

Shouldn't be to hard to repair I think, but what could be the problem?
Any Cyrus experts?
Does someone have a schematic for me?

thanks in advance
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Old 31st May 2007, 05:43 AM   #3
jaycee is offline jaycee  United Kingdom
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There is probably a relay to disconnect the speakers, and either the relay or the circuit controlling it has stopped working. That's entirely a guess, to be honest!
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Old 31st May 2007, 07:05 PM   #4
Juko is offline Juko  Netherlands
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there are no speaker relays, so i don't think that's the problem
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Old 31st May 2007, 09:28 PM   #5
anatech is offline anatech  Canada
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Hi Jurriaan,
There is a problem all right. These do not have a relay to disconnect the speakers and normally do not pop. A 7 VDC offset needs to be repaired, don't continue use until it's fixed.

This is not a job I'd recommend that you attempt. There are 24 smt parts that need to be replaced as a proper fix. These are all transistors. You should send it to the factory for this. I do them in Canada. England isn't that far away from you and the guys at the factory do good work.

I used to troubleshoot the leaky transistor, but that is largely a complete waste of time. It is far more prudent to replace all of those things. If you attempt this yourself you must be extremely careful. Some of these parts are hard to get to, and the pads may be lifted if you are not experienced. I hate getting one of these in that have been "struck by technician".

Now for the good news. If done properly by a good Cyrus technician the fault will not reoccur.

-Chris
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Old 1st June 2007, 04:24 AM   #6
Juko is offline Juko  Netherlands
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Hi Chris,

Thanks for the advice. I send an email to Cyrus. I hope it can be repaired in the Netherlands.

Jurriaan
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Old 1st June 2007, 01:18 PM   #7
anatech is offline anatech  Canada
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Hi Jurriaan,
I understand your desire to have it done locally. The most important thing is the skill of the technician. That will have a great bearing on future performance.

I know a good technician there. I'll send him an email to see if he wants to do this ugly job. Understand that seeing one come through the door with this fault does not make me happy. I do them to the best of my ability and it's work.

-Chris

Edit: Request has been sent.
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Old 1st June 2007, 03:53 PM   #8
Juko is offline Juko  Netherlands
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Chris,
Many thanks, he already contacted me.

Edit:
I see it's in Belgium, well that's a pretty long drive for me, but we will see .
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Old 1st June 2007, 04:03 PM   #9
anatech is offline anatech  Canada
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Hi Jurriaan,
I think it's worth the drive. These are very easy to ship via post too. Hugo knows how to deal with this amplifier, so either go to him or use the factory - please.

-Chris
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Old 1st June 2007, 07:26 PM   #10
Juko is offline Juko  Netherlands
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I take your advice very seriously. But I don't have that much money (I'm a student), so I have to consider things wisely.
I hear from your words you love cyrus amps and wish them the best and Hugo sounds to me like a nice fellow. So don't be afraid that I let someone mess up my amp .
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