Author Topic: wvc 1200  (Read 287 times)

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Offline enti

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  • Country: fr
wvc 1200
« on: October 10, 2019, 02:52:29 pm »
Hai,
A new WVC inverter 1200 watts , after one day it died on me.
No warranty!!
Outside 40 degrees Celsius, input about 900 watt, and probably too hot.
I think there are  two resistors’ and  one  diode  burnt out.
Questions. Is there a way off finding out wat the value of the parts are.
Is overheating the reason of the failure. And can there me more  parts damaged.
And wat is the function of the broken parts.
And most important, can it be repaired?
Thanks, I hope the pictures can explain more than I can tell.
 

Offline f4eru

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  • Posts: 557
Re: wvc 1200
« Reply #1 on: October 13, 2019, 07:37:18 pm »
A new WVC inverter 1200 watts , after one day it died on me.
No warranty!!

Why no warranty ? any product sold in EU has the manufacturer, reseller and importer as responsible. (are you hte importer ?)

Questions. Is there a way off finding out wat the value of the parts are.
Sure. This is a part of a H-bridge. locate the opposite supposedly identical section, and reverse engineer those.
- RLC meter for passives.
- Google "SMD cookbook" if refs are visible on semiconductors
- cheap "transistortester" can often detect the type of component

And wat is the function of the broken parts.
seems to be mosfet driver or current measurement stuff.
Mosfets are probably blown too.

And most important, can it be repaired?
Yes, but why ?
it's often not economically interesting, and if badly designed will explode again.
I recommend changing for a better brand when the chinesium stuff explodes after one day, and has no warranty.

Thanks, I hope the pictures can explain more than I can tell.
Yep

PS: tu habites ou en France ?
 

Offline enti

  • Newbie
  • Posts: 2
  • Country: fr
Re: wvc 1200
« Reply #2 on: October 13, 2019, 08:00:00 pm »
Warrenty NO.  I did buy the inveter in May this year from a seller in Eastern Europa, using Amazon, I tried to contact seller via Amazon but  according to Amazon I never did buy the inverter in May of this year, so the did not want to help me further. Thats that!
Anyway, thanks for the info up until now.
One thing I don't understand is this answer
"""
Sure. This is a part of a H-bridge. locate the opposite supposedly identical section, and reverse engineer those.
- RLC meter for passives.
- Google "SMD cookbook" if refs are visible on semiconductors
- cheap "transistortester" can often detect the type of component
"""""
Can you please explain to me  (H-Brige ) what it means and where i can find the identical section?
I'm not a electronic nurt, I try to understand stuff, but please keep it simple!!
Living in France???? Yes, unfortunately!!!
Thanks

 
 
 

Offline f4eru

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  • Posts: 557
Re: wvc 1200
« Reply #3 on: October 15, 2019, 07:52:10 pm »
Ah, je suis en Alsace :)
For the H-bridge, as you cayn google H-bridge, you'll see it's typically made by two identiccal half-bridges.
So you have a similar/same circuit on the opposite leg presumably, and you can reverse engineer this one by measuring it's known good components
 


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