Transformer part ID please

[Adrian Graham]

On 21/01/2017 21:59, "Tony Duell" <ard.p850ug1 at gmail.com> wrote:

> On Sat, Jan 21, 2017 at 8:43 PM, Adrian Graham
> <witchy at 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?