PCB Guitar Mania Orbital Device (EQD Grand Orbiter) Troubleshooting Help

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andrewtobia
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Post by andrewtobia »

Hello! Longtime lurker, first time poster.

I recently built this pedal. All seems well but when I turn it on, I get a rhythmic clicking and the LED pulses at the same right. No signal is passed (though it passes freely when in bypass) and adjusting the rate knob does not alter the rate of the click/led. This seems like a very specific issue so I'm hoping there's *a* cause that somebody can direct me to?

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mauman
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Post by mauman »

Welcome! Here's the schematic for reference. If you could post some photos of the board, that would be very helpful.
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Orbital-Device-Schematic V-1-1.pdf
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andrewtobia
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Post by andrewtobia »

mauman wrote: 05 Feb 2022, 05:01 Welcome! Here's the schematic for reference. If you could post some photos of the board, that would be very helpful.
Thanks for the schematic. Although I know, roughly, how to read it, I'm not really sure how to wield it in a troubleshooting-type way.

Couple photos of the board:
PXL_20220209_185757472.jpg
PXL_20220209_184859379.jpg

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karul
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Post by karul »

IC4 (TL 072) orientation is wrong on your pcb. It might be damaged now. Test it, or use different one.
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andrewtobia
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Post by andrewtobia »

Wow, what a rookie mistake! Good looking out. I'll test it and try a new one (when they arrive) if it's busted. Thanks!

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