Hello Golfo,
Thank you for your help Relayer.
You're welcome
The problem is that I don't know the correct rating and delay time of the fuse.
The fuse rating is: 3.15A with time delay. You quoted the correct numbers at the bottom of your
last post.
The fuse will be a cylindrical micro 8mm high by 8mm diameter and in most cases colored black.
Also to the right of the big condenser it seems something has been removed.
I agree. I should have noticed it myself. :bang: It will be an 8 pin PWM Controller Integrated Circuit.
The IC could be an UCC38084 PWM Controller or a variant of it. Please don't quote me on that,
as there are a multitude of different types have made over the years and most are not interchangeable.
The fuse is of the type T3 15A 250V, stamped on the pcb. I can try. Do you think it's worth changing the capacitors/condensers too?
No. No point obtaining a fuse without replacing the missing IC. I doubt there will be anything wrong with any of the
capacitors, and as said, its not worth buying anything without the schematic.
That's why i wondering if anyone had the electrical diagram.
I have to agree, you will need to find a schematic diagram of the PSU. Otherwise you'll be flying blind.
I would also hazard a guess that when the unit was inspected by the service company, they realized that the IC in question
had more than likely been damaged to a point that it was impossible to identify it via its own printed number on top of
the component. They may have removed it in anticipation of being able to replace it, but never bothered to put it back
when they realized when they could obtain no information for themselves about the unit. Hence, they were also unable
to locate a circuit diagram to identify the IC, hence deciding not to pursue the repair.
There are only two possible options you have:
(1) - Contact Humax in the UK, and ask if they could provide you with a schematic diagram, or even a part number for that
missing IC. You only need to quote the model number of the PSU which is: PW1001 Rev. 1.0 and component location: IC1.
(2) - Purchase a 12 volt 2.5 Amp power supply and modify it to suit your decoder. Perhaps a plug-pack power supply.
Installing a DC jack into the back of the decoder and using the existing DC output wiring loom to attach it to the rest of the unit.
Sorry that I can't be of any more help to you.
Regards,
Relayer