HELP Finding Rotary Encoder

[EEVblog]

I can't find a match for this faulty rotary encoder. Early-mid 90's vintage.
Any leads appreciated. Thanks.
No markings on it. Come from a swiss bit of kit.

[floobydust]

need a pic

[EEVblog]

need a pic

You can't see the pic?

[floobydust]

No, the post is only some text. No attachment.

[DavidAlfa]

Pic working here. Indeed very weird pinout!

[EEVblog]

No, the post is only some text. No attachment.

The pic is an inline URL. That's the first time I've heard of inline external pics not working.
https://pbs.twimg.com/media/F8dv97rbQAAEd6W?format=jpg&name=900x900

[EEVblog]

Pic working here. Indeed very weird pinout!

Yep, I can't find anything close.
And yet another repair video I can't complete because Murphy bites me on the arse.

[Peabody]

I can't see any pic in the original post either.

Edit:  I'm running Windows 10, and the picture does not appear in Firefox, but does in Edge.  Can anyone suggest what setting I can change in Firefox to get this to work?  I assume it has something to do with recent work done on inline images.

Edit2: I see the picture in Firefox if I turn off Advanced Tracking Protection for EEVblog/forum. So apparently Firefox doesn't like the link to the picture.

Edit3:  What's odd is that the link shown in post #5 is visible, and the picture comes up when I click on it.  But the picture still doesn't appear in post #1 unless I turn off tracking protection.

[Zenith]

A drop in new replacement is always the best and easiest way to go.

You might be able to take that apart and repair it. it doesn't look as if it's intended to be taken apart and it may require some surgery and gluing back together.

You may be able to use something else with the same functionality but a different pinout and bodge a connection with wires.

[coromonadalix]

the 2 small pins must be the shaft push switch 

and on each side (bigger ones),  the 2 pins  must be a switch and the other 2  the second one   

weird indeed

[fmashockie]

I assume you already tried resurrecting it with contact cleaner?  It looks to be a mechanical encoder which means some dirt in there is likely blocking the conductive traces or disk.  If you can't penetrate the internals with contact cleaner, why not try taking it apart to clean it as someone suggested? You've got nothing to loose at this point.  Could also make for an interesting video!

[wasedadoc]

Are those dome heads in the four corners cross-head screws?  Photo isn't clear enough to be certain one way or the other.

[DavidAlfa]

I assume you already tried resurrecting it with contact cleaner?

Looks sealed / glued. Any attempt at opening it will probably end in your trash bin.
But if lucky, maybe it's only the 4 plastic rivets holding it.

[floobydust]

I think it's basically a custom hen's tooth. I could not find the manufacturer. Pic of the topside could add more info.
Modern parts, instead of pins exiting under the middle, the encoder PC board is extended sticking out and the pins come out there.
Looks like Bourns ECW but EPS has the push switch.
Original bolts to the front panel, so the PCB doesn't give much support?

If I loved the piece of test equipment, I'd make an adapter PCB and fit a newer part (they are thinner, smaller, even slim SMT)- assuming the quadrature switches share a common on the main board.
The old part died from either wear or oxidation, so in desperation I would flood it with PPE to see if that fixes it. But it's plastic bushing and shaft so not a long life part in the first place. Or it got bashed.

Remote image loading issue appears to be due to private browsing, tracking protection: 'The resource at “https://pbs.twimg.com/media/F8dv97rbQAAEd6W?format=jpg&name=medium” was blocked because content blocking is enabled.'
This is on a few browsers I tried, unless I go directly to the URL.

[EEVblog]

I can't see any pic in the original post either.
Edit:  I'm running Windows 10, and the picture does not appear in Firefox, but does in Edge.  Can anyone suggest what setting I can change in Firefox to get this to work?  I assume it has something to do with recent work done on inline images.
Edit2: I see the picture in Firefox if I turn off Advanced Tracking Protection for EEVblog/forum. So apparently Firefox doesn't like the link to the picture.
Edit3:  What's odd is that the link shown in post #5 is visible, and the picture comes up when I click on it.  But the picture still doesn't appear in post #1 unless I turn off tracking protection.

Maybe that's a new change to Twitter that is mucking up with browser protections?

[Peabody]

Maybe that's a new change to Twitter that is mucking up with browser protections?

I've never used Twitter.  Is pbs.twimg.com a Twitter link?

[EEVblog]

Maybe that's a new change to Twitter that is mucking up with browser protections?

I've never used Twitter.  Is pbs.twimg.com a Twitter link?

I presume so because I just dragged the photo into the Twitter post.

[EEVblog]

Top side.

[EEVblog]

FOUND!
It's a german "angle pulse encoder" by EBE
https://www.buerklin.com/en/p/ebe/motion-sensors/48431-03103/75E480/#download
https://www.eevblog.com/forum/blog/eevblog-1572-haefely-16kv-esd-tester-teardown-repair-part-1/msg5115804/#msg5115804

[DavidAlfa]

Ahh "Drehimpulsgeber" how didn't  I try that!

[Kaluluka]

FOUND!
It's a german "angle pulse encoder" by EBE
https://www.buerklin.com/en/p/ebe/motion-sensors/48431-03103/75E480/#download
https://www.eevblog.com/forum/blog/eevblog-1572-haefely-16kv-esd-tester-teardown-repair-part-1/msg5115804/#msg5115804

WELL DONE!
Here (location is Germany) cheaper on EBAY:

https://www.ebay.com/itm/325846363879

[fmashockie]

After watching video and seeing the symptom I can see why he didn't consider penetrating with contact cleaner.  I would have still tried dousing it with DeoxIT 

[Peabody]

So if you didn't want to spend the time and money to replace it with the same item, how would you rig something up to duplicate the function using one or more regular rotary encoders?  You could use one of those 10-cent MCUs to service the regular encoder, then regenerate the ouput on two of its pins.  But is there any more direct way?  I can't think of one.

[EEVblog]

After watching video and seeing the symptom I can see why he didn't consider penetrating with contact cleaner.  I would have still tried dousing it with DeoxIT 

I did, it didn't do anything.

[EEVblog]

So if you didn't want to spend the time and money to replace it with the same item, how would you rig something up to duplicate the function using one or more regular rotary encoders?  You could use one of those 10-cent MCUs to service the regular encoder, then regenerate the ouput on two of its pins.  But is there any more direct way?  I can't think of one.