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Boss ME-50 issue
Boss ME-50, originally with no power. Found voltage rails but seemed to be missing the 3.3V. Replaced a couple blown capacitors, a blown transistor, and...
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Line 6 FM4 startup issue
Anybody have any thoughts on FM4 that won't kick on? Had a short on the 3.3V line that located to the 56364 IC at U2. Replaced the IC and seem to have proper...
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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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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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1980 EHX Small Stone - Power Filter Issue?
Hi everyone,
I'm currently working on an EHX Small Stone Phaser, made ~1980. I think this is close to the "Issue J" circuit, with "EH1048"...
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Help with Arion SCH-1 Chorus/Vibe Mod
Hi everyone,
I've been working on an Arion SCH-1 chorus pedal from the 80s. It had a sketchy footswitch, so I decided to convert the whole thing...
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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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Twin Reverb '65 Reissue Reverb Effect Not Working
Help please! My reverb channel doesn't seem to be working properly. I can hear the reverb responding when i tap on the tank but it's not affecting the guitar...
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Yamaha DSC-20M Schematic
Anybody have the schematic for the Yamaha DSC-20M chorus pedal? Pedal works under battery, but plugging adapter in kills all life; D2 diode also does not...
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Squealing / Drill -ish Sound from Amp.
Hey Guys,
so i finally tried to fix my old Valvestate vs100. Iam far away from an Expert. I can repair my guitars and stuff but never tried...Last edited by Jaoon; 05-12-2022, 06:33 PM.
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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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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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Custom Pedal Switch Build - Tone affected by relay
hi,
I'm building a customized guitar pedals switch. I tried two different kinds of relays, first I tried with the TQ2-5V-3 Panasonic Low Signal...
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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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'65 Deluxe Reverb Amp Buzz
Hey guys,
I've just turned on my '65 Deluxe Reverb and it has a very loud buzz to it now. Tried changing power source incase it was dirty power,...
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Boss DD-7 Modding advice - Effects loop
Hi everyone,
I've been tinkering with some mods on a Boss DD-3, replacing the direct out jack with a normally closed stereo jack (effects loop...
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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,...