Nar The output section is all a bit confusing to me right now, all i know is that the two big chips with heat sinks are 2-diode rectifiers. Just jumper it if needed. Annoyingly i sold a big box of transformers on ebay about a month ago that i though i would never use. The other connector is the AC in. Does anyone have an idea of how to do this?
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Muramar The outputs are taken from windings on the transformer, rectified and filtered. Or have i got this all wrong? I removed J1 that links T1 to the center point of the two main filter caps.
From what i understand it is not needed usually. This makes me think i have been in completely the wrong area. Hi, good luck with replacing components, have you the tools to test capacitors? IR3M02 datasheet However its actually fine there. Not sure if connecting this is a good idea, with that Auxiliary PSU powering part of it. Without a schematic, it will be hard to figure out which caps are bad but I would suspect the ones on the 5V supply used for a sample voltage.
Yes my diagram is wrong, the circuit is correct however. I would first replace all smoothing caps on the 5V rail, most likely the four large ones at the upper right of the first pic. In fact I think this is the problem. Yes — looking at your drawing again. Most of my troubleshooting back in the day was using my scope as a DC meter also.
I think i can just about see where your are going. The capacitor is labeled: Hi, well i replaced the non-polar cap with a new one, and replaced the 5 electrolytic caps on the output side, but its still not working. The whole site, http: Make sure everything you soldered on, etc is back in place, including the selector switch.
Why do manufactures have to be so cryptic sometimes: Its been a while since I read the values on a power resistor, is the placement of the ohm symbol supposed to indicate the multiplier? Thanks for ir3n02 your help. LM on their outputs. Annoyingly i sold a big box of transformers on ebay about a month ago that i though i would never use. They are in the post but Xmas postage is a disaster. We took a break and went out to a bar for a couple of beers, then the solution came to me and I went back to the shop and fixed it.
That will give you a range of DC to expect at red. Best to come up with a substitute supply. AC across the yellow? Related Articles
IR3M02 DATASHEET PDF
I checked the electrolytic caps with my multimeter on the high ohms range and they started out low and went up. In V mode it is open. In fact I lr3m02 this is the problem. That will give you a range of DC to expect at red. I get about 7V on the 12V and 3V on the 5V for a second datasheef then it dies.
Good Idea I am going to try to get an early nights sleep to night. Something is wrong with your voltage switching. AC across the yellow? What is the voltage rating of C11? I removed J1 that links T1 to the center point of the two main filter caps.