Looking for the part number on this , its to a Chrysler 1994 car stereo
P04704383AC, location is VR805
Only marking on it is

Alps
Japan

https://www.mediafire.com/view/lk899arhjefddsn/HPIM1410.JPG/file

https://www.mediafire.com/view/y5wpnrawhn47qem/HPIM1411.JPG/file

The shaft is broke, and does not seem to turn, but the 2 pins usually mean
its a push button type.

I do have a push button type in stock, but the shaft is larger and I guess
you have to know
the resistance on the 3 terminals?

Unable to locate a service manual or schematic for this model.

On Sun, 5 May 2024 14:56:40 -0400, "UFO" <tech@parts-link.net> wrote:

>Looking for the part number on this , its to a Chrysler 1994 car stereo
>P04704383AC, location is VR805
>Only marking on it is
>
>Alps
>Japan
>
>https://www.mediafire.com/view/lk899arhjefddsn/HPIM1410.JPG/file
>
>https://www.mediafire.com/view/y5wpnrawhn47qem/HPIM1411.JPG/file
>
>The shaft is broke, and does not seem to turn, but the 2 pins usually mean
>its a push button type.
>
>I do have a push button type in stock, but the shaft is larger and I guess
>you have to know
>the resistance on the 3 terminals?
>
>Unable to locate a service manual or schematic for this model.

It's probably not a resistive potentiometer. More likely a digital
shaft encoder:
<https://www.reddit.com/r/AskElectronics/comments/15bfj2i/volume_control_from_my_older_1996_chrysler_town/>
<https://www.amazon.com/DIYhz-Rotary-Encoder-Digital-Potentiometer/dp/B07D3DF8TK>
<https://m.media-amazon.com/images/I/71DJ0OfTXAL._AC_SL1200_.jpg>

--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558

On Sun, 05 May 2024 17:17:14 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:

>It's probably not a resistive potentiometer. More likely a digital
>shaft encoder:
><https://www.reddit.com/r/AskElectronics/comments/15bfj2i/volume_control_from_my_older_1996_chrysler_town/>
><https://www.amazon.com/DIYhz-Rotary-Encoder-Digital-Potentiometer/dp/B07D3DF8TK>
><https://m.media-amazon.com/images/I/71DJ0OfTXAL._AC_SL1200_.jpg>

Note that there are various types and styles of this rotary encoder:
<https://www.lgswitch.com/ec-rotary-encoder.html>
I can't determine which is the correct model because the shaft is
broken off. It could be anything from EC6 to EC21 and beyond.

--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558

That hit on Reddit is exactly the same board, so that must be how the
original shaft looks.
I am thinking Alps EC11 like these https://www.ebay.com/itm/113261494197
and the comments on reddit says they went with an EC11.

Not sure if its a D shaft...or curcular. He lists 15 or 20mm circular or D
shaft in the drop down.
Then the question is , are the detents the same. Guess I would have to take
this one
apart to determine the number of detents. Usually once you find the number
of detents
the electrical spec seems to match. 30 detents maybe....

On Sun, 5 May 2024 21:42:04 -0400, "UFO" <tech@parts-link.net> wrote:

Is this the radio?
<https://www.ebay.com/itm/404464506685>
I could't find a schematic or parts lists.

>That hit on Reddit is exactly the same board, so that must be how the
>original shaft looks.
>I am thinking Alps EC11 like these https://www.ebay.com/itm/113261494197
>and the comments on reddit says they went with an EC11.
>
>Not sure if its a D shaft...or curcular. He lists 15 or 20mm circular or D
>shaft in the drop down.

If you buy a cicular shaft, you can always use a file to convert it to
"D". Same with the length of the shaft, which can be cut shorter.
Stretching the shaft can be done by filling the both ends to a "half
shaft" and either pinning or gluing them together.

I'm not sure about the cost of shipping to/from UK, but at the stated
price, you could probably afford an assortment.

>Then the question is , are the detents the same. Guess I would have to take
>this one
>apart to determine the number of detents. Usually once you find the number
>of detents
>the electrical spec seems to match. 30 detents maybe....

Look at the specs near the bottom of the eBay listing:

2 Bit Gray Code
That's probably correct. Two pins for the push button and three pins
for the two phases.

Continuous Travel
That means there's no stops on rotation. That's probably correct.

Momentary push switch.
You can test that by grabbing the center shaft with a pair of plier
and see if it moves when you push or pull on the shaft.

20 position/pulses per 360 degree (rotation).
Hard to tell from here. I don't know. I think 24 steps per
revolution is more common. From the Reddit photo, it's the volume
control.

5-pin, 3 pins for the 'code' and 2 pins for the push switch.
Yes, that's standard.

Supplied with nut & washer
No clue on the thread type. Metric vs imperial?? Probably metric.

Rated Voltage: 5v DC
That's ok.

Conductor: min. 0.5mA max. 10mA
OK.

Operating temperature: -10°C~+70°C
Just fine.

I can't be sure if the eBay part is a suitable substitute but is seems
likely. If you have time, buy 1 or 2 and see if it works.

--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558

On Sun, 5 May 2024 21:42:04 -0400, "UFO" <tech@parts-link.net> wrote:

>That hit on Reddit is exactly the same board, so that must be how the
>original shaft looks.
>I am thinking Alps EC11 like these https://www.ebay.com/itm/113261494197
>and the comments on reddit says they went with an EC11.

Note that the "11" in EC11 means that the base is 11mm x 11m. You
should be able to measure the broken encoder with a rules.

Also, I think the Alps Encoder Product FAQ might be useful:
<https://tech.alpsalpine.com/e/products/faq/encoder/>

This is there selection of EC11 encoders:
<https://tech.alpsalpine.com/e/products/category/encorders/sub/01/series/ec11e/>

--
Jeff Liebermann jeffl@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558