giobbi
Veteran Member
...I'm sure with this title everybody will read the post :D
>>> Dave, Mike, don't worry: it wasn't the 3032! ;-)
The fact: I was trying to fix a minor issue on my spare 8032-sk. I programmed a flashROM for the Nicolas Welte's RAM/ROM adapter and, since the instructions talk just about PET 2001 and PET 2001/N, I was wondering if it is compatible with the 8032 model too.
I switched on the computer and in totally relaxed and zen state of mind I was trying to look at the monitor (an opened 8032-sk has the crt towards the desk so you have to duck to see it). Few seconds later an explosion make me jump some meters far from it, scared, and a white smoke started to exit from the computer. It was a big "boomm!", definitely!
The first, irrational thought was: "well, it isn't compatible, indeed!" :D
When I disconnected the plug from the outlet I looked at the board, expecting to find it totally burnt. Nope. Clean and cold. Some smoke seemed to arrive from inside the monitor, so I opened it but it was all clean, too. The traf was cold and apparently clean, too.
Then I find something like a small capacitor close the interruptor and the fuse-holder that was black and smoky (I'm not talking about the big capacitor on the secondary line).
I looked at the schematics from Zimmers.net, but there's no trace of this component. However it is an original component put by Commodore, indeed; or, at least, all point in that direction: the way it is installed, the presence of a connector for it, etc.). So I cleaned it and I discovered it should be a line filter: 0,1 uF + 2x2500pF x2 (? - the "x2" is almost deleted so I'm not sure) + 2 x 100 uH - 250v.
Since this computer was built in West Germany for the european market (220v - 50 Hz), maybe they added this... filter? for some reason.
Nice part: nothing more seems to be damaged: even the fuse is still good! And the blowed filter is in series with it!
Here in Brazil we have 110v and 220v @ 60 Hz instead of 50 Hz; until now, however, nothing I took from Europe reacted so bad to the different frequency
Questions:
- Does anybody has seen something like that in the past?
- Could be depend from some other cause?
- What should I do before to switch the computer on again?
- Will it work fine without this filter, since not even the original project mention it?
-- Giovi
>>> Dave, Mike, don't worry: it wasn't the 3032! ;-)
The fact: I was trying to fix a minor issue on my spare 8032-sk. I programmed a flashROM for the Nicolas Welte's RAM/ROM adapter and, since the instructions talk just about PET 2001 and PET 2001/N, I was wondering if it is compatible with the 8032 model too.
I switched on the computer and in totally relaxed and zen state of mind I was trying to look at the monitor (an opened 8032-sk has the crt towards the desk so you have to duck to see it). Few seconds later an explosion make me jump some meters far from it, scared, and a white smoke started to exit from the computer. It was a big "boomm!", definitely!
The first, irrational thought was: "well, it isn't compatible, indeed!" :D
When I disconnected the plug from the outlet I looked at the board, expecting to find it totally burnt. Nope. Clean and cold. Some smoke seemed to arrive from inside the monitor, so I opened it but it was all clean, too. The traf was cold and apparently clean, too.
Then I find something like a small capacitor close the interruptor and the fuse-holder that was black and smoky (I'm not talking about the big capacitor on the secondary line).
I looked at the schematics from Zimmers.net, but there's no trace of this component. However it is an original component put by Commodore, indeed; or, at least, all point in that direction: the way it is installed, the presence of a connector for it, etc.). So I cleaned it and I discovered it should be a line filter: 0,1 uF + 2x2500pF x2 (? - the "x2" is almost deleted so I'm not sure) + 2 x 100 uH - 250v.
Since this computer was built in West Germany for the european market (220v - 50 Hz), maybe they added this... filter? for some reason.
Nice part: nothing more seems to be damaged: even the fuse is still good! And the blowed filter is in series with it!
Here in Brazil we have 110v and 220v @ 60 Hz instead of 50 Hz; until now, however, nothing I took from Europe reacted so bad to the different frequency
Questions:
- Does anybody has seen something like that in the past?
- Could be depend from some other cause?
- What should I do before to switch the computer on again?
- Will it work fine without this filter, since not even the original project mention it?
-- Giovi
