# \#1007 midimuso midi-cv

**URL:** <https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446>\
**Category:** FAQ\
**Created:** [July 15, 2020, 1:06pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446 "2020-07-15T13:06:09Z")\
**Posts on this page:** 1\
**Showing post:** 140

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**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\
**Post date:** [September 25, 2020, 8:33pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/140 "2020-09-25T20:33:17Z")

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FIXED 🙂

I bet your thihngking great, he’s fixed it and not going to spill the beans like so many techincal threads on forums.

So.

I had a better look at the schematic, determined the opamp must just be acting as a biased buffer.

Not a lot to go wrong there really.

I was going to check the output voltage of the opamp, but thought I should check the power rails first. +12 was fine, - 12 was awol. It was awol on all the 74’s

I quickly checked my new PSU and that was fine

I then started looking at the board.

 ![DSC_7894](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/6/69b4c2de8106fd5b58beb622d6fe919581183fca.jpeg)

AHHHEMMMMM

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