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jtoff7273 4th December 2016 12:11 AM

Anyone have a Fishman Loudbox schematic to share?
I have one of these and the reverb isn't working. I've ruled out the tank and connectors. I though it might be worth a shot to see if anybody has one that they could share with me. I've looked and haven't been able to find one. Thanks!

dthodoris 28th January 2019 11:36 PM

Hi I have the exact same problem.Did you manage to find schematics?

kevinaston1 29th January 2019 09:22 PM

Fishman Loudbox
1 Attachment(s)
Here you go, hope it helps.


IceFyre13th 30th January 2019 05:27 PM


Originally Posted by kevinaston1 (
Here you go, hope it helps.


stephen_keller 30th January 2019 06:29 PM

There is a Loudbox schematic here:

This is the thread if the above link doesn't work: Loudbox mini

You may need to join the MEF to see the file.


kevinaston1 30th January 2019 08:58 PM

1 Attachment(s)
So sorry; it is a long time since I looked in my Fishman folder. This one any good?

Actually, the "joke" service manual is the one supplied to Fishman service centres, any fault and you replace the chassis.


marmotteinoz 3rd March 2019 12:27 PM

Dear Kevinaston1
Do you happen to have the schematics for the Loudbox Artist model?
By chance any mechanical drawings?

I am trying to fix one - can't seem to find a way to open the bottom "main" enclosure which contains the speakers, power transformer etc...
THX a lot

kevinaston1 5th March 2019 08:41 PM

Fishman Loudbox Artist
All the electronics for the artist are in the metal chassis at the top, remove three screws at each side at the top, and lift the chassis out - ensure you disconnect the loudspeaker lead before lifting the chassis right out.

If you need access to the "base of the unit", gently prise off the loudspeaker grille, and remove the bass driver - but it is just air in there.

Schematic attached.


marmotteinoz 12th March 2019 09:16 PM

Thanks a lot Kevin

Sorry for the delayed response, I wasn't logged in on my phone and your post somehow didn't sow up there :/

Was able to check the bottom part now indeed.

The schematics you have attached are not for the same model though.

The Artists model has a bank of 4 voltage regulators at -14, 14, 12 and 24V
See Fishman Loudbox Artist Repair question : GuitarAmps and Fishman2 - Google Photos

marmotteinoz 22nd March 2019 07:02 AM

Dear all,

I spent some time drawing this schematics for the main board. Lots of fun (first time I'm doing that!) , obviously lots of errors/incorrectness (I didn't do a proper set of hierarchical sheets ; not sure if my global labels are the proper way to do that ; R values are a bit all over the place:)

R1 looks weird. (see my other post). Would a burned resistor measure a higher value than its nominal? If not, why would it be one order of magnitude higher resistance than its three siblings R32 R33 and R34 ?
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