The Sinclair QL Forum

Hi,

Just taken my PSU apart, seeing the inside.
I was curious about the condition of elyt cap, actually found two inside,
cannot read the capacity, 300... uF?

A potentiometer covered in white pigment of some sort?
Elyts visually looking good, no leaks apparent.

Cannot tell the wiring applicable to me, also pros cons of these?
[Dilwyn's H/W section]
http://www.dilwyn.me.uk/docs/hardware/psu1.jpg
http://www.dilwyn.me.uk/docs/hardware/psu2.jpg
Many thanks
Tom

tcat wrote: cannot read the capacity, 300... uF?

Those are 3300uF. I've replaced a few before just because I was 'inside' but I don't think they tend to fail that often. Is the PSU broken?

Not broken, just health inspection.
Do I have a thyristor version or the other, cannot tell?
Also is the thyristor one considered better / worse over the other?

There was a discussion long ago, about the wiring types, as there are two; that I cannot find now.

Many thanks
Tom

tcat wrote:Not broken, just health inspection.
Do I have a thyristor version or the other, cannot tell?
Also is the thyristor one considered better / worse over the other?

There was a discussion long ago, about the wiring types, as there are two; that I cannot find now.

Many thanks
Tom

As the components used are the same I think you'd have to follow the circuit to see what version you have. I didn't even know there were 2 different types, so if it works and the caps looks good, may as well leave it as it is.