Help Fixing a C Audio Pulse 2x1100 |
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H3ct0r
Registered User Joined: 08 February 2022 Location: Cambridge, UK Status: Offline Points: 11 |
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Posted: 12 April 2022 at 11:12am |
Hello there everyone,
I am currently trying to fix a Pulse 2x1100 for my school and I am kind of back to square one. I thought that I had fully diagnosed the amp, ended up doing a swap on most of the semiconductors on the board, upgraded the IGBT’s and did a couple of the mods. After all of this was done, I isolated the power supply and powered it on, It seemed to run fine. I proceeded to connect the channels back up and powered the amp on, it seemed to run fine at first when all of a sudden, I saw a massive blue spark and both IGBT’s were split in half and my test resistor that I fitted instead of the soft start resistors got super hot. I now find myself with the same issue at the start, channel one tests fine with a multimeter and the output transistors on channel two are shorted, I have completely no idea on how to diagnose what the issue actually is and would need some advice from someone who has a bit more experience than me. Thanks in advance Br. Hector
Edited by H3ct0r - 12 April 2022 at 11:15am |
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H3ct0r
Registered User Joined: 08 February 2022 Location: Cambridge, UK Status: Offline Points: 11 |
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If you need any more info, feel free to ask as I am very keen to get this amp back up
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cravings
Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7442 |
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simonp1100 on this forum is the authority on these amps.. search his posts for wisdom, or maybe he'll appear and see this..
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H3ct0r
Registered User Joined: 08 February 2022 Location: Cambridge, UK Status: Offline Points: 11 |
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i’ll take a look
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4947 |
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Did you replace the insulating washers on the channel output transistors? They can easily punch through at the bolt holes especially if overtightened or old ones reused.
Edited by kedwardsleisure - 12 April 2022 at 12:48pm |
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Kevin
North Staffordshire |
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H3ct0r
Registered User Joined: 08 February 2022 Location: Cambridge, UK Status: Offline Points: 11 |
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I replaced most of them, i did also test between the case of the output device and the heatsink and it is completely insulated
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H3ct0r
Registered User Joined: 08 February 2022 Location: Cambridge, UK Status: Offline Points: 11 |
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I have found his profile but I am unable to PM him, any chance that you would be able to?
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APW
Young Croc Joined: 13 November 2012 Location: Kent, UK Status: Offline Points: 1174 |
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you need 10 points before you can PM, 3 or 4 more posts and you will then be good to go.
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H3ct0r
Registered User Joined: 08 February 2022 Location: Cambridge, UK Status: Offline Points: 11 |
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ill reply to this in order to stack up some more lol
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APW
Young Croc Joined: 13 November 2012 Location: Kent, UK Status: Offline Points: 1174 |
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only a few more to go...
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H3ct0r
Registered User Joined: 08 February 2022 Location: Cambridge, UK Status: Offline Points: 11 |
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Let’s hope this one does it
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H3ct0r
Registered User Joined: 08 February 2022 Location: Cambridge, UK Status: Offline Points: 11 |
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Dropped him a PM, hopefully I get a reply
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