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Old 5th January 2013, 05:50 PM   #1
JGAN is offline JGAN  United States
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Default Help me identify this part and find a replacement?

Hey guys,
The selector dial on my stereo receiver was malfunctioning, and I need to find a replacement part. I think it is either a rotary switch or rotary encoder, made by Mahsushita (now Panasonic). The only other markings on it are "012" and below it "12B" but I have not been able to find a datasheet on it. The base is about 15mm on each side, and the dial itself has one flat edge and a diameter of about 5.95mm. Also, it has no stop and turns infinitely.

Here are some pictures and the schematic symbol also: ImageShack Album - 5 images

Anybody know for sure what it is and what a suitable replacement part would be?

Thanks,
JGAN
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Old 6th January 2013, 04:55 AM   #2
JGAN is offline JGAN  United States
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Actually I just opened the case and it is a rotary switch, not encoder (there is no PCB). How do I determine how many ways, poles, and positions it has to find a suitable replacement?
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Old 6th January 2013, 09:27 AM   #3
yajnaS is offline yajnaS  India
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Have you googled for a service manual for your receiver ? (for the BOM in it)

It has to be an encoder otherwise the receiver has no way of knowing if you're rotating it clockwise or CCW.

Last edited by yajnaS; 6th January 2013 at 09:30 AM.
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Old 6th January 2013, 09:51 AM   #4
Mooly is online now Mooly  United Kingdom
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You'll have to do a bit of research but a quick search turned these up,
Incremental | CPC | Results
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Old 6th January 2013, 11:57 PM   #5
JGAN is offline JGAN  United States
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Quote:
Originally Posted by yajnaS View Post
Have you googled for a service manual for your receiver ? (for the BOM in it)

It has to be an encoder otherwise the receiver has no way of knowing if you're rotating it clockwise or CCW.
Ok, I think you're right. Most likely an incremental rotary encoder?
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Old 7th January 2013, 12:33 AM   #6
JGAN is offline JGAN  United States
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Also, it is not in the service manual. And I can't find any 4 pin rotary encoders.
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