# Weired scale problem
**URL:** https://forum.moogmusic.com/t/weired-scale-problem/23210
**Category:** Minimoog Forum
**Created:** [April 3, 2025, 2:01pm UTC](https://forum.moogmusic.com/t/weired-scale-problem/23210 "2025-04-03T14:01:53Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Salomonander](https://forum.moogmusic.com/u/Salomonander)
#### Post date: [April 3, 2025, 2:01pm UTC](https://forum.moogmusic.com/t/weired-scale-problem/23210/1 "2025-04-03T14:01:53Z")
Hey guys,
I have a minimoog that has the following problem:
Oscillator 1 does not follow the keyboard. Meaning that if i play a scale, there is a point where the notes actually go down instead of up. The middle B is still good, but the following C is actually a Bb and so the D key is C so to say….
When switching octave, the problem still persists at the given position.
The other oscillators do not have this issue.
Where would i start the search? I did install new resistors on the right hand side of the oscillator board. Could i have messed up a value?
Thanks!
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### Author:  [@Salomonander](https://forum.moogmusic.com/u/Salomonander)
#### Post date: [April 4, 2025, 9:17am UTC](https://forum.moogmusic.com/t/weired-scale-problem/23210/2 "2025-04-04T09:17:47Z")
Actually, it jumps back to an A not Bb. Any tips on where to start my search are very welcome. Im not a synth expert, so i dont really know where to start looking…
Im also wondering if it is possible to extract the flag poles of the duo tyne card edge connectors without the specialized tool. I have some really bad looking contacts and deoxid cant even get them shiny. The dedicated extraction tool is still available but it costs a fortune,
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### Author:  [@Salomonander](https://forum.moogmusic.com/u/Salomonander)
#### Post date: [April 10, 2025, 9:14pm UTC](https://forum.moogmusic.com/t/weired-scale-problem/23210/3 "2025-04-10T21:14:41Z")
It turned out to be a bad solder joint at the summing 741 ic of oscillator 2. Somehow this messed up the tuning of oscillator 1. Its all good now.