DX-style Operator (Thru-Zero FM/PM oscillator - FM Ogre)

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toneburst
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Post by toneburst » Mon Aug 12, 2019 4:45 pm

wsy wrote:
toneburst wrote:I assume the pots all behave "normally" (all switches off?)
They seem to, yes. I'm not going to be able to look into this in detail for a while, but my plan then was to check the soldering of the DSPIC pins, then if that doesn't fix it, try and trace back from there to the switch, and check all the components are properly soldered.

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Slomen
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Re: DX-style Operator (Thru-Zero FM/PM oscillator - FM Ogre)

Post by Slomen » Wed Apr 29, 2020 11:59 am

My FM Ogre has died... No sound, no signal, no lights. Anyway I can troubleshoot it?

I found out when a friend borrowed it. I dont think he has burnt it, and I cannot see or smell anything burnt...

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woodster
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Re: DX-style Operator (Thru-Zero FM/PM oscillator - FM Ogre)

Post by woodster » Thu Apr 30, 2020 6:34 pm

Yes, there is a way to troubleshoot it, but not from the info you've provided.
You'd need a DMM, or maybe a scope with probes.

Another way to solicit help would be to upload hi res pictures of all sides of all pcb's.

Octofish88
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Re: DX-style Operator (Thru-Zero FM/PM oscillator - FM Ogre)

Post by Octofish88 » Mon Jun 29, 2020 7:06 am

Hey I posted this elsewhere but I wonder if this is a more appropriate place.
I've also just bought an FM Ogre second hand and I wonder if mine is faulty? The first problem is that, with nothing patched into the FM input, the FM knob raises the pitch. It goes up by about an octave across the range of the knob. Is this normal behaviour, I'm assuming the pitch should stay the same, it makes it very hard to dial in FM ratios. The second problem is that when the PM amount is high there is an audible click each time the P<0 LED blinks on and off.
If you've got this module can you confirm whether this behavior is normal or with there is a fault with my module?
Thanks very much!

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