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Russell H.
Russell H., Service Tech
Category: Consumer Electronics
Satisfied Customers: 10298
Experience:  8+ years of professional experience
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I'm troubleshooting a dead Fishman Aura Spectrum DI guitar

Customer Question

I'm troubleshooting a dead Fishman Aura Spectrum DI guitar preamp. There are three input transistors marked M6G3 1G & 1G. It looks like the first stage is a High impedence configuration, the next voltage gain & the 3rd current gain. Signal dies between the 2nd stage in & out. Is there a parts list or schematic available got this unit so I can get spare parts?
Submitted: 11 months ago.
Category: Consumer Electronics
Expert:  Russell H. replied 11 months ago.
Hi, thank you for contacting My name is Russell. I will do my best to provide the right answer to your question. There are no schematics available, that I can find after an extensive search for them, nor are there repair manuals, service manuals, nor parts lists for your Fishman amplifier. I suggest that you contact Fishman and ask if they can provide you with a schematic or parts list for your Aura Spectrum DI preamp. the CONTACT link to contact Fishman.) As for the 2nd stage voltage amplifier, I would examine all resistors for subnormal or obviously supernormal measured values (in case the biasing is now off, shutting down the amplification) and after that I would replace any capacitors or other components that are either bulging or leaking, or burnt looking, or have left a brown spot on the reverse side of the circuit board, or just the active components in the 2nd stage (since active components, transistors and chips, are quite often defective after a time.)

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