# Cc121 fader works not correctly

**URL:** <https://forums.steinberg.net/t/cc121-fader-works-not-correctly/969862>\
**Category:** CC121\
**Created:** [February 2, 2025, 11:33pm UTC](https://forums.steinberg.net/t/cc121-fader-works-not-correctly/969862 "2025-02-02T23:33:08Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![slowhand73](https://avatars.discourse-cdn.com/v4/letter/s/c2a13f/32.png) [@slowhand73](https://forums.steinberg.net/u/slowhand73)\
**Post date:** [February 2, 2025, 11:33pm UTC](https://forums.steinberg.net/t/cc121-fader-works-not-correctly/969862/1 "2025-02-02T23:33:08Z")

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My fader works not correctly. Have a new fader installed but the same. When I move the fader, the fader in Cubase Mixer works, but when I move the Mixer-Fader in Cubase the fader on cc121 doesn’t move correctly - is there a defekt in the circuit board ?

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**Author:** ![st10ss](https://dub1.discourse-cdn.com/steinberg/user_avatar/forums.steinberg.net/st10ss/32/145012_2.png) [@st10ss](https://forums.steinberg.net/u/st10ss)\
**Post date:** [February 3, 2025, 5:35pm UTC](https://forums.steinberg.net/t/cc121-fader-works-not-correctly/969862/2 "2025-02-03T17:35:41Z")

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Is the power supply correct?  
If that is not sufficient, the fader doesn’t follow.

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**Author:** ![SF\_Green](https://dub1.discourse-cdn.com/steinberg/user_avatar/forums.steinberg.net/sf_green/32/735_2.png) [@SF\_Green](https://forums.steinberg.net/u/SF_Green)\
**Post date:** [February 4, 2025, 4:10am UTC](https://forums.steinberg.net/t/cc121-fader-works-not-correctly/969862/3 "2025-02-04T04:10:14Z")

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The fader motor requires the power supply be connected. Everything else on the CC121 will work off just the USB power, but the fader motor doesn’t work without the PS.

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**Author:** ![slowhand73](https://avatars.discourse-cdn.com/v4/letter/s/c2a13f/32.png) [@slowhand73](https://forums.steinberg.net/u/slowhand73)\
**Post date:** [February 4, 2025, 8:33pm UTC](https://forums.steinberg.net/t/cc121-fader-works-not-correctly/969862/4 "2025-02-04T20:33:29Z")

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Yes I know for what PS is. And yes, PS works perfect.

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**Author:** ![Mark\_Oakley](https://dub1.discourse-cdn.com/steinberg/user_avatar/forums.steinberg.net/mark_oakley/32/2866_2.png) [@Mark\_Oakley](https://forums.steinberg.net/u/Mark_Oakley)\
**Post date:** [March 8, 2025, 3:35am UTC](https://forums.steinberg.net/t/cc121-fader-works-not-correctly/969862/5 "2025-03-08T03:35:39Z")

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I have a power supply with a switchable voltage and a few days ago I accidently switched the voltage to 5 volts. Exactly as you describe-everything worked except the fader movement. I could control the on-screen faders from the CC121, but its fader wouldn’t follow. When I switched back to 12 volts, everything worked perfectly.

Thanks for the heads up.

-Mark