Dear sir,
I'm repairing one Induction cooker, when receive from my customer cooker no power, i check found fuse and IGBT are shorted. I also check 2 transistor driver S8050 and S8550 are OK, diode N4148 is ok. I replace new IGBT and use one bulb 60w replace for fuse, turn on cooker but cooker not run, pls refer my video as link"

". To make sure problem is not solved I replace new fuse for bulb 60w and turn on cooker, and again fuse and IGBT shorted, cooker die again. I trying replace new N4148 but problem not solved. I trying to measure voltage at pin G of IGBT have voltage about 1 to 4VDC (voltage waver from 1 to 4 VDC), these are images of it:
http://i.imgur.com/Mq1sxGy.jpg
http://i.imgur.com/0a9B32F.jpg
http://i.imgur.com/hwXIv1z.jpg

tks & rg,
Quynhpham

 

I also replace new capacitors (0.3, 2 and 5mf ) but can not fix. pls guide to me or give me advice.

tks & rg,
Quynhpham

 

...not knowing much about the device, it would be helpful to have a circuit diagram. If there is no diagram, please list the brand and model number.

 

I advise you to consider forgetting about trying to fix this yourself.

If you don't have an 2 or more channel oscilloscope and working knowledge of how higher powered switching power supplies work (which I suspect you don't given what you have done so far) and are trouble shot you have near zero chance of fixing this unit.

 

Dear sir,
I'm repairing one Induction cooker, when receive from my customer cooker no power, i check found fuse and IGBT are shorted. I also check 2 transistor driver S8050 and S8550 are OK, diode N4148 is ok. I replace new IGBT and use one bulb 60w replace for fuse, turn on cooker but cooker not run, pls refer my video as link"

". To make sure problem is not solved I replace new fuse for bulb 60w and turn on cooker, and again fuse and IGBT shorted, cooker die again. I trying replace new N4148 but problem not solved. I trying to measure voltage at pin G of IGBT have voltage about 1 to 4VDC (voltage waver from 1 to 4 VDC), these are images of it:
http://i.imgur.com/Mq1sxGy.jpg
http://i.imgur.com/0a9B32F.jpg
http://i.imgur.com/hwXIv1z.jpg

tks & rg,
Quynhpham

Did you solved your problem...? If you please send clear information to (removed email to avoid spammers), same problem me facing from 3 months

 

https://forum.allaboutcircuits.com/...ker-200watt-igbt-fga25n120.91143/#post-663599

 

The r50 Constantan element is a thermocouple sensor. Have you checked it ... does it have continuity?