Main > Monitor/Video Forum
hantarex polo 28 blows fuse
perjmolsen:
Hi
Now my second monitor in Time Chrisis II need my attention. ::)
Tonight it went bang... and bad smell. :badmood:
I can see that the big 150uf 400V cap has become bad, it also only reads 32uf
The main fuse is also blown
So I have changed the 150uf 400V cap and the fuse - but the fuse still blows :(
What would be the best way to isolate the power-supply from the rest of the board?
Is it to remove the HOT, then if it is the flyback or hot the fuse will not blow?
Then I also can test my volts?
Or what do you mean ? :D
perjmolsen:
Bridte rectifier diodes tests OK
HOT tests OK
perjmolsen:
hmm..
I think that it is the T101 - when I removed the clamp that hold the transistor in place, the transistor felt apart :laugh:
So I have ordered 10 new IRFBC30 in china
perjmolsen:
Hi
I have a Question.. ;D
I can see that the blown T101 is a P4NA60, if i google it the data sheet -> https://pdf1.alldatasheet.com/datasheet-pdf/view/24416/STMICROELECTRONICS/STP4NA60.html
I have a K3567 in an old chassis from a tv.. can that replace the P4NA60?->https://alltransistors.com/mosfet/transistor.php?transistor=14506
Both are N -Channel MOSFET and 600V.. but what values need to be the same when replacing a transistor?
perjmolsen:
Hi
I now have change the T101 with a replacement K3567 n-channel mosfet and now the fuse does not blow.
But I do not have any B+ at tespoint TP6 it is just 0V
If i look at the diagram it says, check R103 it might be open - but i can not find that resistor.. I assume it needs to be in the power supply area...