Is it possible for transformer substitution?

[R_J]

Re: Is it possible for transformer substitution?

but it looks very bodged - so who knows - and look at the same switch handling mains and secondary - thats insane!

The switch is only connected to the primary, not the secondary

[stj]

Re: Is it possible for transformer substitution?

it looks like the led connects

[R_J]

Re: Is it possible for transformer substitution?

The blue lead from the positive terminal connects to one lead of the led, the other lead of the led likely has a resistor inside the insulated tube that connects to the negative terminal. the three blank terminals on the other half of the switch don't connect to anything.

[eccerr0r]

Re: Is it possible for transformer substitution?

Rukycon!

[eccerr0r]

Re: Is it possible for transformer substitution?

BTW a so-called Dim Bulb Tester is the most excellent test unit to see if the transformer is still any good.
Connect a 60W incandescent lamp in series with the primary (or in parallel with the burnt fuse) and see if it lights up when you plug it in (with no load on the output). If it doesn't glow, the transformer may still be good. If it doesn't glow and then you short the output of the PSU (the red and black terminals) and then it starts glowing, then your transformer may still be very operational.

If it lights brightly with no load on the output of the PSU, do not pass go, do not collect $200, transformer probably belongs in the bin.

[mikey5791]

Re: Is it possible for transformer substitution?

but it looks very bodged - so who knows - and look at the same switch handling mains and secondary - thats insane!

Is there any danger of accidentally eletrocuted from a wet finger touching the same switch handling mains and secondary? Kindly advice any better way to modify this setting.

[eccerr0r]

Re: Is it possible for transformer substitution?

You should always exercise caution regardless, but as R_J said, the switch is half-used and only on the primary side.

[stj]

Re: Is it possible for transformer substitution?

is dodgy as fuck using that type of switch with mains, the clearance between the contacts and metal frame is way too small

[mikey5791]

Re: Is it possible for transformer substitution?

Dear all,
With helpful assistance and kind tips with schematic and lots of patience, i finally unsolder the donor transformer from the burned pcb and moved it to the kent unit. Put in an incandescent light bulb in place of the 3A glass fuse, and switched on the main. The light bulb doesn't glow, no smoke or spark and i set the front switch to 12v. The led indicator lights on, and measuring the output gives a reading of 16.2vdc.
Wow, thanks so much guys. Finally you made me a happy guy today. This forum has been a great source for helping those in need in getting things fixed and therefore reduce waste in the landfill.
Bravo!

[stj]

Re: Is it possible for transformer substitution?

i love the ghetto mains connections!
specially the clip designed for papers

[eccerr0r]

Re: Is it possible for transformer substitution?

Next you need to mod it so that it actually regulates voltage down to a common value... like this supposedly commercial but may well be homemade PSU: https://www.badcaps.net/forum/showthread.php?t=110815