On 21/01/2017 21:59, "Tony Duell" <ard.p850...@gmail.com> wrote:
> On Sat, Jan 21, 2017 at 8:43 PM, Adrian Graham > <wit...@binarydinosaurs.co.uk> wrote: >> Hi folks, >> >> Does anyone know what this is? It's obviously a transformer coil(s) but >> image search and googling those markings produces nothing: >> >> http://www.binarydinosaurs.co.uk/la4543.jpg > > I think the LA number is the number for the ferrite 'pot core' not the > complete transformer. > > It looks to be part of a switching regulator circuit. Possibly to generate > other voltages from the 5V line. Can you post a picture of more of the PCB > around it. Its second output goes via an IN4148 to the -24V regulator: http://www.binarydinosaurs.co.uk/STCExecutelPowerRegulation.jpg The top black wire is from the PSU and goes left-right (in pairs) GND, +5, +12, -12. I'd do an underside pic too but the board's covered in analyser wires at the mo. The -24V regulator can be seen just above the 4 blue caps, The regulator that can be seen under the black wire is a 7812. The LF351N has -12V present at its bias outputs, the opamp to its right has no markings helpfully. Cheers, -- Adrian/Witchy Binary Dinosaurs creator/curator Www.binarydinosaurs.co.uk - the UK's biggest private home computer collection?
