Behringer EP2500 Bridge mode not working - diyAudio
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Old 24th July 2013, 11:30 AM   #1
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Default Behringer EP2500 Bridge mode not working

Ok, so I repaired this amp. CH2 was fried. Replaced o/p transistors and two Fets. Both channels now work great into a load. When I switch the dip switched to bridge mode, (yes I know how to bridge these amps with these switches), I get a very feint signal and the CH1 clip LED lights with only a very small volume setting. Waveform on scope looks pretty distorted.
Any ideas? I can post a schematic.
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Old 24th July 2013, 04:32 PM   #2
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Could you post the schematic? Could be a dud opamp used to invert one channel for bridge operation or something but without the circuit it's just a guess.

In the meantime, have you checked the DIP switches? Do all of them still make and break contact as they should?
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Old 25th July 2013, 06:42 AM   #3
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Hi I have checked the dip switches and ribbon cable. All check fine. I agree its something to do with the inversion cct somewhere. Strange thing is both channels work separately ok.
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Old 28th July 2013, 09:36 AM   #4
Tarzan is offline Tarzan  Belgium
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Here the schematic.
It's in fact a .7z but I had to change it to .ZIP to get it through.
It can shed a light on the problem.
Attached Files
File Type: zip EP2500 REV G.zip (173.0 KB, 24 views)
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Old 28th July 2013, 09:44 AM   #5
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Quote:
Originally Posted by diy didi View Post
When I switch the dip switched to bridge mode, (yes I know how to bridge these amps with these switches), I get a very feint signal and the CH1 clip LED lights with only a very small volume setting. Waveform on scope looks pretty distorted.
Do you connect speaker to Red output connectors?

Regards zeoN_Rider
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Old 28th July 2013, 12:46 PM   #6
amptech is offline amptech  Scotland
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this was posted on different forum ...anz was ic6 solved
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