Olsen 595 Output Problems

**jmksparks** · 12-03-2016, 10:12 PM

Originally Posted by Ronp

Nope 595 feeds 2803 then leds then rj45 so if leds work whats next lol

Would have to disagree with you their. LED,s on this version are powered by 595s then the 2803s after. I have these boards, homemade from plans from here.

**P. Short** · 12-03-2016, 10:36 PM

Based on the trace files from the wiki and provided by DVC2013, I'll agree with jmksparks.

**davdue** · 12-03-2016, 10:49 PM

Thanks everybody for your replies. I hope to have a chance tomorrow afternoon to try swapping some chips out. No time during the week because the show starts right after I get home from work and was busy today Christmas shopping.

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**Reddy_Kilowatt** · 12-03-2016, 11:24 PM

It sounds like there is at least a couple of versions of the board...

I dug up a post of a 595 with what appears to have the LED's after the ULN's. I believe it may be Macrosill's coop board...

http://doityourselfchristmas.com/for...564#post122564

Dave can you post a picture?

**davdue** · 12-04-2016, 03:55 PM

So I swapped a "potential" good 2803 chip from another spare board and no change. I guess I should swap another known good chip on the same board. Anyway attached are pictures of the LED's on the Olsen and the tester, what board I have, and the traces showing the 2803 drives the Led's and the outputs.

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**P. Short** · 12-04-2016, 04:03 PM

Looks like Ronp was right.

In any case, I would use a light and a magnifying glass to look inside the Rj45 connectors for the offending channels, checking for bent, corroded or otherwise damaged contacts. That is, if you haven't done this already. Also double-check for cold solder joints on the RJ45 connectors that may have decided to go open this year.

**davdue** · 12-04-2016, 04:06 PM

Yeah. This board was purchased already built so could definitely be a cold joint or problems with the RJ45 connector.

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**davdue** · 12-04-2016, 11:20 PM

So I found the problem. It was the RJ45 connectors. The stupid connectors that were used on this board. They have little fingers that the contacts are supposed to stay in but they get out of line and get stuck below the fingers and then don't spring back up to make contact with the connector. Apparently they didn't come from Mouser. Thanks for all your help.

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