Who does rotary encoder repair? It keeps skipping values.

goldtop

Do we know anyone who does encoder repair?

It's for a Sony multi-FX unit (HR-MP5) and it has the usual skipping-values problem, as described on this page: https://mysynthfetish.tumblr.com/post/162433746066/hr-mp5-encoder-fix ;

If they also do a PCB battery swap (soldered-in type to swappable), that would be ace.

Funkfingers

I fixed the encoder value skipping issue on my E-Mu Proteus 2000 rack synthesizer module. 

My recollection is that I opened up the encoder case, cleaned the contacts, bent a few of the prongs back into the same height alignment as the majority of them, put it all back together. That encoder works correctly to this day. 

goldtop

That looks to be the case. This particular one requires a housing to be desoldered in order to get at the innards. That's supposedly within my skill set, but I hate working on PCBs if I can pay someone else to do it!

TeleMaster

I use these guys. Fast and reliable. I'm not too far away which is cool.

http://www.audiorelated.com/

tampadragon

Sorry to jump into the thread but,
is there a way to identify the encoder specs on a board?
I am building a new control panel for my M Audio Venom and have damaged, beyond repair, one of the encoders on the board. I need to order new ones but can’t work out what spec they are.
I have asked M Audio for a service Manual for it, but they have not been forthcoming with a response.

axisus

I'm a diy sort of person. My old original AxeFx was skipping. Pulled it apart, bought a new encoder for about a tenner and soldered it in. Works perfick!

tampadragon

axisus said:

I'm a diy sort of person. My old original AxeFx was skipping. Pulled it apart, bought a new encoder for about a tenner and soldered it in. Works perfick!

How did you know what encoder to get? These don’t have any obvious markings other than that they are Alps one!   

axisus

tampadragon said:

axisus said:

I'm a diy sort of person. My old original AxeFx was skipping. Pulled it apart, bought a new encoder for about a tenner and soldered it in. Works perfick!

How did you know what encoder to get? These don’t have any obvious markings other than that they are Alps one!   

To be honest it was easier with the AxeFx as a few people had that problem and fixed it, so there was a bit more info floating around.

FYI: I emailed a company that seemed to specialise in Sony spares. They asked for the part number so they weren't very helpful in the end.

stonevibe

goldtop said:

Do we know anyone who does encoder repair?

It's for a Sony multi-FX unit (HR-MP5) and it has the usual skipping-values problem, as described on this page: https://mysynthfetish.tumblr.com/post/162433746066/hr-mp5-encoder-fix ;

If they also do a PCB battery swap (soldered-in type to swappable), that would be ace.

If I can't be arsed to do it myself, then I use one of two local guys in and near Exeter. But, I would suggest you look near where you live.

Cost wise its an hourly wage, plus parts and so you could easily waste £100 plus VAT on a simple job like this one.

normula1

Try squirting some de-oxit or servisol (not wd40) into the encoder and give it lots of twists back and forth. IIRC I put my TC GMajor on its rear enge and ran the cleaner down the shaft. Has been fine since.

thermionic

normula1 said:

Try squirting some de-oxit or servisol (not wd40) into the encoder and give it lots of twists back and forth. IIRC I put my TC GMajor on its rear enge and ran the cleaner down the shaft. Has been fine since.

There are different types of “rotary encoder”, some could be an analog pot with peripheral circuitry to generate digital values such as 0-99. This is what is in my Vox Tonelab (desktop) - it suffered from skipping values and a squirt as you suggested cured it. There are more sophisticated rotary encoders and this may not work for those. Pots move less than 360 degrees (or multiple turns) whilst true encoders will rotate indefinitely in either direction.

normula1

The TC ones are def rotary encoders.