Re: High Voltage Shocker - components blown in new machine
Replaced the MOV and fuse. Machine working again!
Then the step down transformer blew after about an hour's use. Easily replaced. Wrong values.
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Re: High Voltage Shocker - components blown in new machine
WOW, multimeters are cheap! Just found one (new, free postage) for roughly $5 US on Ebay UK. [url]http://tinyurl.com/ml7vgq9[/url]Re: High Voltage Shocker - component.../ml7vgq9[/url]
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Re: High Voltage Shocker - components blown in new machine
Yes, the fuse in the photos is the one that blows still (before changing the MOV, but with a step-down convertor in use).
I've not managed to do any resistance testing (but will try to get the gear to do this).
Also, the machine is stored at a friend's house. I'll try to photograph the board (both sides) asap.
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Re: High Voltage Shocker - components blown in new machine
Thanks. It sounds like there's a half-shorted component in that case, because the new fuse blows clear.
Next step ideas? From earlier posts, it sounds as if I need to work out a way to test the resistance of components around the fuse. So there may well be another 1/2/3/4/5 components to replace.
Are you optimistic of this being reparable? I may be able to buy/borrow testing gear. But don't want to waste anyone's time.Last edited by Douglasbell01; 10-17-2013, 11:33 AM.
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Re: High Voltage Shocker - components blown in new machine
Just to double-check, is this an appropriate voltage convertor for the machine, or is the Amp output too low? [url]http://tinyurl.com/o5wguur[/url]
The convertor that I've bought has a 45VA Output (just checked). While the unit's label states 0.9A Input... so it seems likely that I actually need a converter with 100VA output.
(Workings: 0.9A v 110v = 99VA)
To expand on testing methodology: I've recently removed the broken MOV.
Before removing the broken MOV, I tested...
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Re: High Voltage Shocker - components blown in new machine
Found these on eBay (in China, but cheap Int'l shipping) [url]http://tinyurl.com/kkvfpsp[/url]Re: High Voltage Shocker - component.../kkvfpsp[/url]
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Re: High Voltage Shocker - components blown in new machine
Hopefully these additional pictures will help. There's not much info with this machine regrettably, but there is a label on the bottom (picture #2).
I'm trying to find a 10mm MOV with those values on ebay.co.uk without success.
Following the advice in the previous post (thanks!)... the closest component I have found is a 7mm MOVs on eBay UK with those values (271K / 175 VAC): [url]http://tinyurl.com/nc64or4[/url] - would that replace the blown part, or is there something critical about the...
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Re: High Voltage Shocker - components blown in new machine
Thank you all for such good feedback. It may be that there are other blown parts, but I will try to fix the varistor/fuse and re-test.
The machine is for the US market, so operates at 150v rating.
It's a 10mm Varistor. Just found one on eBay (150v) for £1.15, thanks to above comments.
[url]http://www.ebay.co.uk/itm/VARISTOR-10MM-DISC-150V-ERZV10D151-1845440-/271241150184?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item3f273b7ee8[/url]
So... I could/should fit...
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High Voltage Shocker - components blown in new machine
I recently bought a 110v screen printer (Yudu), shipped over from The USA to The UK. Very rare in the UK. Almost no info online about repairing it (probably discontinued by the manufacturer).
The UK's 240v mains supply did not go down well, as the Yudu was plugged in excitedly without thinking about the different US/UK voltages. I've since bought a voltage converter.
Switched it on and... Pop! Spark, smell, noise. The fuse blew out, and a ZNR1 Varistor too. Maybe more. Photos attached.
[ATTACH]72402[/ATTACH]
[ATTACH]72403[/ATTACH]...
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