开云体育

Hi Dave, Many thanks! For your comments, I did make some headway today ,haven't found any bad components yet but did get some smooth voltage adjustment from the Master side, No the metering is not working correctly! Could be my fault got some connectors mixed up for the metering shouldn't be too hard to figure out.
The metering does light up and appears to work but not reading correctly, I dlo have extra chips if needed.I took my measurements right from the Master output terminals ,in place of relying on the internal meters, seems like at first I has full range to 31volts but when I checked again it was only half of that, not sure whats going on , when you adjust voltage the relays are clicking like a pinball machine!
Hope I dont have a bad relay could be hard to replace, actually the relays and the transformer are the only difficult components to replace everything else is commom easy to get stuff.
Earlier I took a look at tekscopes for other threads on the PS280 there were some, I would really like to hear what users think about the relibality and Quality of it , I see no one learned their lesson on using counter sunk screws in cheap plastic!
How about using a counter bore, And pan head screws!
I'm working one handed due to a couple strokes, doing well considering but work is slow!
On the plus side there is a Theroy of design in the manual I got from Tekwiki , Many Thanks to whoever did that nice work!
Unfortunately the manual is the wrong revision for the one I have.? Seems there was 3 versions or revisions mine seems to be the latest and has the heatsink inside? and one main board with a zillion connectors.
The schematic is usefull in a general way just the connections are wrong fot the revisions, I looked for a different manual but wasn't able to come up with anything usefull. If anyone has one Please post it!
I'll do my best to keep you posted on my progress or lack of it.
There are a ton of these on ebay most bad which makes me think there is a design flaw ? Any comments welcome!
The PS 280 is branded with the Tek Name but wasn't built or designed by Tek , It was aftet sold out to Danaher I think and built and designed by Goodwill a Taiwaneese company Wich explains the Asian capacitors and transistors in it.
Best regards to all.
Daven9ooq