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Crown XS1200 Amplifier PIC Controller

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simonp1100 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote simonp1100 Quote  Post ReplyReply Direct Link To This Post Topic: Crown XS1200 Amplifier PIC Controller
    Posted: 25 May 2016 at 7:01pm
Hi All, hope someone out there can help me.

I have a Crown XS1200 amplifier for repair and have found the fault to be the main PIC processor (some of the lines are near shorts when taken out of the board RC0, RC1 & RC2). Has anyone got a faulty amp (XS1200 or Crown Pulse) or know where i can get a new processor from or does anyone have a second hand one ????.

Any info no matter how remote.

Cheers (here's hoping).Wink
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2016 at 8:22pm
See PM and drop me an email, I might just be able to help!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jacethebase Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2016 at 9:24pm
Brit Row Have a pile of XS left. I bought all of their remaining Pulses last year.
www.deltastarevents.com

www.dss-audio.co.uk
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2016 at 9:33pm
Not a fan of the XS.  IMO Crown took the Pulse design, failed to fix any of the issues and just engineered in some more!
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simonp1100 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote simonp1100 Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2016 at 5:06pm
Hi, Big thanks to Chris (Ceharden) & Kevin (Kedwardsleisure) with all their help & advice regarding a repair on a Crown XS1200 amplifier & PIC firmware (thanks Chris). Amplifier now working fine and new lower gate charge IGBT’s also fitted (UIS). Thanks guys, nice to know there a people out there who can and will help out. Cheers ClapClap
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 05 June 2016 at 1:16am
Cool

Glad it's back up and running.

I'm rebuilding a Pulse that someone did a horrible repair job on.  They'd done a partial output transistor replacement but tighten the bolts too far so they cut through the insulation washers, shorting the power supply to the heatsinks.  Unfortunately it's one of the many issues with the Pulses you have to watch out for.  I learnt about it the hard way the first time...  Kapton washers help to avoid it, they're harder to cut through.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DanyyX Quote  Post ReplyReply Direct Link To This Post Posted: 10 July 2016 at 10:49pm
Hello!

I'm glad, that I found this topic!
I've got two Pulse 2x1100 amps for repair and both have a same problem... the faulty PIC16C57 controller. One of the amps is untouched, and I'm the first who tries to fix it, but the other one have problems beyound the MCU. The American crown support told me, the Pulse is not a crown developement, just moved from C-Audio and they have no documentation for it, so they can't help with parts or firmware, but I can try the locan distributor in my country. The local distributor suggested me to buy a new XS amp, because XS is better, and they have them in stock...

I have experienced in PIC MCU-s, I've got some programmers, a lot of controllers, etc... Can someone have a code for the MCU in the pulse, and is it possible to send me via email or something?

Thanks, 
Daniel
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 10 July 2016 at 11:30pm
Hi Daniel,

I would send you private message but they aren't enabled until you have 10 posts to your name.

Try this link....

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DanyyX Quote  Post ReplyReply Direct Link To This Post Posted: 10 July 2016 at 11:38pm
Perfect! I successfully downloaded them, more than thank you!
Tomorrow I am going to burn the controllers, and I hope... at least one comes to life.


Edited by DanyyX - 10 July 2016 at 11:39pm
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 10 July 2016 at 11:48pm
Good luck!

I was given them many years ago by Lee Basham, ex C-Audio engineer.

I believe as the story goes, the Pulse Amplifiers weren't even designed by C-Audio either.  If you compare the style of PCB design to BSS products of a similar vintage you will see some similarity.

I'll give you another tip for free.  The E-core gate drive transformers WILL fail on every Pulse eventually!  The solution is to wind new ones on toroidal cores.  I think it's N97 ferrite I've used in the past and go for about 1 turn per Volt.  Mine usually ended up at about 27 turns primary and 17 turns for the secondaries.  Works perfectly.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote VentureSound Quote  Post ReplyReply Direct Link To This Post Posted: 11 July 2016 at 9:11am
Are those files HEX for burning straight on to a PIC, Chris?
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 11 July 2016 at 9:14pm
Yes, they may require a change of file format depending on what programmer you're using but they are the binary firmware image.
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