I was messing around with my SX-64 (which is on ePay as a working unit)
yesterday, having located some software & a joystick for it. I was going to
take a few photos of the new bits, etc.; for adding to the listing.
Then: *sharp snap/crack noise*, lights go out.
Aaaargh!
OK, first things first: There was no burning smell, and no (visible) magic
smoke released. The fuse wire in the glass fuse has been vapourised; the
mains fuse survived. I replaced the fuse, which has not since blown, but the
PSU is deader than a dead thing that's been dead for a week.
Some careful poking around with the multimeter (before the multimeter went
bang - ffs, I must have an anti-midas touch this week), then the
oscilliscope, reveals that a secondary transformer on the PSU has failed. I
presume it went dead short, then burnt itself + the fuse out simultaneously;
hence the reason the replacement fuse hasn't blown.
So, what I need to do now is replace the transformer, or get it repaired
somehow (ideally before Sunday, when the ePay auction runs out - or, to
definitely know it is unfixable in that timescale & thus cancel the
auction).
What I DO have, which might make a repair feasible, is a second SX-64; the
only difference is, this one has a US (117v) PSU. Obviously, the primary
transformer windings are going to be different, but is it possible/likely
that the secondary transformer will be the same? Going by the part nos. I'm
not terribly hopeful:
UK Part no: TDK 68-0409 B8326A
US Part No: TDK 68-0407 B8309A
A quick google on any of those numbers reveals nothing...
I don't have the means to create 117v 60hz power, so I can't test that way -
and even if I could, it turns out that the US PSU has taken a wallop at some
point, breaking the circuit board. :(
Hey ho... any help gratefully received.
TIA!
Best Regards,
Ade.
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13:25