Kaon Internal Fuse

Uk2cyp

Hi

My receiver is a Kaon KSC 570 and does boot at all(no power).According to the manual there is an internal fuse but I cant see one inside.Does anyone know where i can find it

Thanks Pete

spiney

Quite often, the fuse doesn't look like a fuse, instead it's soldered to the board and looks like a component, and you have to solder in a repacement. In which case, to i.d. it, you need to follow the circuit board tracks from mains input .....

Often, the fuse itself looks like a small black or blue cube, whereas everything else around it is clearly either a capacitor or resistor or transformer, or some type of semiconductor. That might help, but do then check that it really is the fuse.

It's done like that because the fuse isn't expected to blow unless there's a serious power supply fault ..........

It goes without saying, observe safety precautions, do any work with receiver disconnected from mains, etc .........

Uk2cyp

*Spiney

I think the only way to fix it is to buy a new
power supply board.I was quoted 39 pounds from Shebasat.
I might as well buy a new receiver at 70 pounds


I have taken a photo of the board if someone can show me where the fuse is
for future reference

http://homepage.ntlworld.com/odellp/images/kaon.jpg

Regards

Llew

It's the Wickman fuse, the black cylinder, at the bottom right of the large white connector (top left of the PSU in your picture).

Can't read the rating though.

Llew

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Uk2cyp

Tyanks Llew

I can only just see the rating on the fuse
Its something like
SR-5 ?
T2A 250V

I found a website that sells these

http://www.signalsuk.com/
I think its one of these two
just enter into the search field
T2A5WM
T2WM

I will phone them tomorrow

Thanks again

Llew

T2A on their site, but it's a quick- blow. Normally you use anti-surge (slow-blow) fuses for mains input circuits due to surges on switch-on, transients etc.

Be aware that a fuse blows for a reason - faulty component in your STB or, if you're lucky, a large power surge at the mains or perhaps a voltage spike within the PSU has blown the fuse. Hopefully one of the latter.

Try http://www.grandata.co.uk/ (fuse section) for a Wickman A/S fuse.

Llew

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spiney

Yeah, sorry! I forgot to say that type of fuse can also be a cylinder, and might be mistaken for an electrolytic capacitor!

Generally, these solder-onto-board type fuses are available from the usual components suppliers ...... (cpc, grandata, possibly RS, etc).

Llew

Do you know what SR -5 might indicate spiney? Slow blow rating?

Llew

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spiney

www.hy-line.de/en/com/power-components/products/protection-devices/bussmann/sr5-fuse/ .

I think it's just a product serial number! Following above link to data sheets might find something, but there's a lot there!

(That's not much help in selecting the correct replacement, I know!).

Uk2cyp

I've ordered Fuse 90 from Grandata
Wickman slow blow 2A fuse
I think this is the correct one
Hopefully it will arrive in the next few days
Also managed to remove the old fuse this morning
First time i've used a soldering iron for about 20 yrs!!

Llew

Cheers, more data sheets to add to my files

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Llew

OK odellp, hope it does the business.

Llew

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spiney

Well, in absence of other info, I'd have thought a standard sat receiver would use maybe up to 30W (at full 500mA lnb current!), and a PVR type maybe something like 80-100 Watts.

So, for normal receiver, yes, maybe a 3A fuse, allowing for switch-on surge.

Good luck.

Uk2cyp

Hi again

Soldered the new fuse but no joy
Looks like i will have to get a new receiver

Thanks for your help guys.It was worth a try

Regards