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Messiah2 V1.22 problems.
Messiah2 V1.22 problems. –
I purchased 10 Messiah2 chips,V1.22(eur) & the track has been cut(at the factory i asume),but I still meter across the diode to be safe. 3 of the chips still have a short across the diode.Removing the diode from the cct, then metering again,the diode is ok,so the short exists across the diode pads.
What i want to know is:
1)Has anyone seen/heard of this fault??
2)Will it affect operation??
The short should obviously not be there,so it may a production fault???One of them also exhibits a strange reading:it meters a "reverse bias" across the diode points with the diode removed,ie, + of meter to Cathode, - of meter to Anode.
I don't want to instal them as i may void my warranty
Maybe one for Charlie to answer,or anyone for that matter.
Can you post a picture ?
I would simply say - does the Messiah 2 work? This is the sort of thing I might go into on a chip that doesn't work - if so, what symptoms? I'm not going to get the meter out right now!
If you're worried about the power diode, just drill the via out with a 1.5mm dremmel/drill.
I think u guys misunderstood me.....the via has already been drilled,but the short still exists,even with the diode removed.
I don't want to instal one in case it has ramifications to the mod &/or PS2.
The short should only exist when the track is not cut/drilled...but it still does with the track cut in my case
You need to set your multimeter to resistor value and not LOGIC.
And then, just check if you get any value (any short), if so, then you have a problem, if not it's all good.
Thanks Gradius & Charlie,
I found that the pre-drilled hole(at factory??) was still causing continuity,& therefore a short across the diode tacks.I scrapped that area & found the short to go away.Fixed this prob on 3 chips
I still however,have one chip that meters a reverse bias across the diode(i know u said not to use logic mode),but the good chips don't.If u could explain why???Otherwise I'll just return it for warranty
I believe just that M2 is defective, you should NOT read 0 ohms, on diode (anode point) or +3V5 point with the track in the other side.
No,no.....i fixed the ones that read 0 ohms by ensuring the track was cut......its just the one that reads a reverse bias(on diode mode),but reads ok on the others that I'm concerned about