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New model. I have all the old ones, the Blues cube etc. Roland will not send me one either... If you have one, let me know!
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That is the amp, yes. Do you have the schematic? All I'm seeing on your attachment is a single page with a picture of the amp.Originally posted by doctor View Post
The problem is I'm not getting anything out of the speaker, and need a schematic to troubleshoot. Thanks!Comment
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I know the attachment is not for the amp you have, but it may give us some pointers.
With power off, measure the speaker voice coil impedance, it should read between 2 & 10 ohms.
If that is ok, measure the power supplies. Low voltage supplies can be measured on any op amp, high voltage supplies on the power amp, either transistor leads, or pins of a power amp ic.
In the attachment there is a mute circuit on the input of the power amp. You may have something similar, and it may be shutting off the signal to the power amp.
it may also be a faulty switch on the headphone socket. If you plug headphones in, do you get sound ?
If you plug another speaker into the "extension speaker" socket, do you get sound ?
Do you get led's turning on on the control panel ?Comment
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Thanks for the schematic.
mozwell, I will dig further into this soon, will post the problem once I get it solved. Don't want to clog up the schematics section with troubleshooting posts. Will respond via PM.Comment
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Hi Atomic
Start a new thread under the amps / repair section.
First things to check are the power supplies, the speaker itself, headphone jacks & pwoer amp insert jacks (if any), internal fuses (if any)
It may just be a dirty jack, or a blown internal fuse.
If all of that checks ok, then start the new thread, detail what you have checked & the generous people here will try to help you. I will be away for work for several weeks & wont be able to help you much.Comment
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