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Okay,
So this is my first post. I've only had this amp a few days. I bought it 2nd hand as something to tide me over until I get some insurance paid out on my recently stolen amp, which is why I've got something sort of cheap and nasty. It's also why I really want to get this working, rather than taking it back and get my money back.
So the issue is, that from the moment I got it home there has been no output to the speaker cab. The pre-amp seems to work as the line out works, as does the 'send' part of the effects loop. I've searched around a lot for this issue and I've tried a couple of things. First thing was to try new fuses, which didn't do anything (unless the fuse blew instantly in which case it's probably not the issue anyway). I've tried bypassing the speaker outs and going directly from red and black but it didn't achieve anything (probably a dumb/useless idea but I'm a complete novice).
I removed the heatsink as I've noticed people talking about thermistors shorting on the heatsink, there was a slight bend in one thermistor, but the result, with it removed was the same. I've closely inspected every solder and capacitor and join and I can't find anything that looks to be shorting, or badly connected. I've noticed there's two LED inside, one red, one green. The green comes on, the red doesn't (although I didn't notice the green one until I took off the heatsink so it MAY not have been on prior, but probably unlikely).
I'm now down to inspecting the ICs. There's two (could that be one for passive one for active or something?) either way they are apparently dodgy on other Behringer models so it stands to reason these could be the issue. I don't know how to test them, but assuming I can find replacements I could try replacing them.
I don't have multimeters, but I may pick some up tomorrow. So if there's things I can check, then let me know and I'll go from there. If anyone has any more ideas or advice it would be appreciated. I've attached a dodgy pic just to show you the gist of the thing... once again probably useless but it seemed like a good idea in my head.
thanks,
Dave
So this is my first post. I've only had this amp a few days. I bought it 2nd hand as something to tide me over until I get some insurance paid out on my recently stolen amp, which is why I've got something sort of cheap and nasty. It's also why I really want to get this working, rather than taking it back and get my money back.
So the issue is, that from the moment I got it home there has been no output to the speaker cab. The pre-amp seems to work as the line out works, as does the 'send' part of the effects loop. I've searched around a lot for this issue and I've tried a couple of things. First thing was to try new fuses, which didn't do anything (unless the fuse blew instantly in which case it's probably not the issue anyway). I've tried bypassing the speaker outs and going directly from red and black but it didn't achieve anything (probably a dumb/useless idea but I'm a complete novice).
I removed the heatsink as I've noticed people talking about thermistors shorting on the heatsink, there was a slight bend in one thermistor, but the result, with it removed was the same. I've closely inspected every solder and capacitor and join and I can't find anything that looks to be shorting, or badly connected. I've noticed there's two LED inside, one red, one green. The green comes on, the red doesn't (although I didn't notice the green one until I took off the heatsink so it MAY not have been on prior, but probably unlikely).
I'm now down to inspecting the ICs. There's two (could that be one for passive one for active or something?) either way they are apparently dodgy on other Behringer models so it stands to reason these could be the issue. I don't know how to test them, but assuming I can find replacements I could try replacing them.
I don't have multimeters, but I may pick some up tomorrow. So if there's things I can check, then let me know and I'll go from there. If anyone has any more ideas or advice it would be appreciated. I've attached a dodgy pic just to show you the gist of the thing... once again probably useless but it seemed like a good idea in my head.
thanks,
Dave
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