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Help identifying front panel header pinout on Dec LPX 466d2 Motherboard

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First post, by elkbullwinkle

Posted on 
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Hi, I have this 486 motherboard coming off Digital dec LPX 466d2 computer and it has a weird proprietary front panel connector. It would be nice to identify the pins, judging by the photos the computer didn't have anything special on the front panel, so I believe it should be speaker, reset (mb), power and hdd leds.

Funny enough there is a service manual available online if you google dec LPX 466d2, however it doesn't have the pinout, just says fp header.

I thought mb if anybody has the same computer, might check out the actual pinout.

I have attached the photos of the header and the board itself, sorry if they're too big.

J32 header.jpg
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J32 header.jpg
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Fair use/fair dealing exception
board.jpg
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board.jpg
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1.71 MiB
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372 views
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Fair use/fair dealing exception

Cheers,
Sasha.

Reply 1 of 2, by PC Hoarder Patrol

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Welcome to VOGONS Sasha.

Looks like DEC used this same header on a number of boards for basic panel functions - as you look top to bottom in your first pic it's RESET, HD LED & POWER LED and will be simple to check which pins are for which functions. If you look at this blow-up from the web (links below) you'll see the same header on the slightly later DECpc LPx 560

DECpc FP Header.jpg
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DECpc FP Header.jpg
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Fair use/fair dealing exception

You can see the original sources at

http://jemascola.blogspot.com/2011/11/digital … pc-lpx-560.html
https://imgur.com/a/8ufkb from a Reddit article

Reply 2 of 2, by elkbullwinkle

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Cool, thanks I will double check. I assumed they were different as that service manual that I've found mentioned a different modification with a different pin header.

P.S I've been reading for a long time, just haven't posted. Also gotta check notification settings, as didn't get an email re your reply.

Cheers. 😀

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