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Arion SCO-1 schematic
Anybody have the schematics for the Arion SCO-1 Stereo Compressor pedal? TIA.
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Glitchy Boss FRV-1 Fender Reverb
Boss FRV-1, bypass works, effect signal works. However, when the effect is on, there is also a repeating, pulsing sound continuously. The sound is similar...
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Boss DD3 Repair Mystery - Signal not passing IC
Hi everyone,
I've been working on repairing a Boss DD3 delay, here is the service manual: https://www.synthxl.com/wp-content/uploads/2018/04...
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Boss PS-2 weak effect
I got a Boss PS-2 that seems to have a weak effect signal. The bypass is fine, as the is the bypass in the mix, but the effect seems awfully soft. In the...
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Dunlop TS-1 Tremolo question
I took in a buddy's TS-1 Tremolo that's giving me a hell of a time. At this point I'm more annoyed by it, and just bugged to figure out the issue. The intensity...
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Boss ME-50 not powering up
I have a Boss ME-50 that isn't powering up. I have 9V at various places, but I believe I'm missing the 3.3V line. The schematic I found online doesn't zoom...
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Guyatone PS-024 Distortion H schematics
Does anybody have the schematics for the Guyatone PS-024 Disortion H pedal? Something in the back end is almost totally shunting my effect signal.
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Bizarre problem: Ibanez CP9 Compressor - No sound when off
Hi everyone,
I'm working on repairing a 1981Ibanez CP9 compressor pedal, with a very strange problem: It works seemingly perfectly when turned...
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Roland Jet AP-7 issue
Hey guys. I have a nice Roland Jet AP-7 that's giving me quite an issue. The "distortion" effect seems to work fine, but none of the positions...
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Boss DM2 Analog Delay Repair - Low supply voltage
Hi everyone,
I've been working on repairing a version 2 Boss DM2 analog delay, service manual attached. After sorting out a short at the potentiometers,...
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Vox AC15 custom - extension ouput
Hi,
Something broke in my Vox AC15 custom, maybe you are familiar with this kind of problem...
I tried to plugin in an acoustic guitar with a...
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1980s Ibanez FL-9 flanger repair
Hi everyone,
I've been working on repairing an original Ibanez FL-9 Flanger, and I'm quite stuck, to say the least. Here are the symptoms:- Only
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beginner amp builder questions
hello! I am new to guitar amp building and have some questions about how to go about building amps.
1. how do I figure out how much voltage I...
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Amp mash-up build
Hello, I have some questions about building an amp with sections from a few different amps. Would It be possible to take a solid state pre amp, add a graphic...3 Photos
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Ampeg SVT-350H problem
I have an Ampeg SVT-350H that isn't outputting to the speaker jacks. It outputs through the power amp out jack, so the problem must be in the power...
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Ibanez PT-9 Phaser Bias Adjustment
Hi everyone,
I've been working on repairing a Ibanez PT-9 Phaser, and have already made a lot of progress, thanks to help from this forum!...
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Ibanez PT-9 Phaser LFO Failure
Hi everyone,
I've been working on repairing an old Ibanez PT9 phaser (service manual attached). The unit had leaking capacitors and damaged tracks,...
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Electro-Harmonix Electric Mistress Repair
Hi everyone,
I recently got an Electric Mistress for repair, and had a question regarding voltages:
When I first got the pedal, one of...
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Ross Big Mouth Bass Amp
Hello,
I'm posting this here because I haven't been able to find much online, so this is a bit of a shot in the dark. A buddy of mine has a Ross...