M542 Driver

[Swarfing]

Yes it could be a protection diode? problem is it is too chard to be sure about position and the number is V55. looking at the other components the ones labeled 'V' would suggest diodes? problem is 'V' can also mean 'variable component', those outside of being a resistor or cap. My guess is that he put the supply wires around the wrong way. I want to replace this first before i can apply any power to it.

I also scored a 2M88ON that has problems too, Tant has been replaced on that one already so will need to do some scope work to find the issue.

[Jonathan]

If you can find what the component is connected to that should make it fairly obvious...

My guess is that he put the supply wires around the wrong way. I want to replace this first before i can apply any power to it.

That's easily done as different drivers put them different ways round - if I recall correctly the 2M880n is the other way round. I've got some pictures of inside a 2m880N, but unfortunately they're mostly out of focus or too dark to see anything useful:



Just out of interest which mosfets does the 2m542 you have use? The one I looked at has IRF9Z34N

[mocha]

LOL, that looks like my 2280n!

Let me know if you need any pics of it...

If you can find what the component is connected to that should make it fairly obvious...



That's easily done as different drivers put them different ways round - if I recall correctly the 2M880n is the other way round. I've got some pictures of inside a 2m880N, but unfortunately they're mostly out of focus or too dark to see anything useful:



Just out of interest which mosfets does the 2m542 you have use? The one I looked at has IRF9Z34N