Boss PS-5 No output when turned on

Forum dedicated to helping people debug and troubleshoot non-functional pedals or builds. Please use an clear and informative title, indicating circuit and basic problem. Don't forget to mark the issue as fixed if this is the case.
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GroundFox
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Post by GroundFox »

I just received a broken Super Shifter from a friend. When it is turned off my guitar signal passes through just fine except on Tremolo arm mode and Flutter. When the pedal is turned on I get no output on any of the modes and the red power light is on for all modes except for T. Arm and Flutter. So I think the problem lies there. The only problem is that I am having a hard time finding a diagram of this pedal. Sadly the only post I found on here has dead links. Also this is my first pedal I am troubleshooting. I have wired up a guitar before but thats the furthest I have gotten. Any advice would be a life saver. I am already looking at some of the beginner guides on here and they have great advice. Thanks in advance for the help!

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CheapPedalCollector
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Post by CheapPedalCollector »

Likely a dead op amp, start checking the voltage at the +/- inputs, should be around 4.5V , if they are around 9V then you found your dead op amp.

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The G
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Post by The G »

I'm afraid that if the circuit is feeding the LED directly from the CPU like in PS-3 and other Boss digital effects, not much can be done, except hope it's something wrong with the rotary switch.
Scrap that, it wouldn' affect the LED.

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