Ade, I think you mean the small transformer with 6 wires attached, this transformer has 2 * 9VAC outputs and one AC-line input (230 or 110V depends on region) This transformer is the supply for the regulator IC's in the PSU the regulators are places on two small PCB's, on the large PCB there is a rectifier (Greatz) witch you have to check. If thats alright you have a reasonable change the PSU works after replacing the transformer with a similar type 2 * 9VAC 3 to 5VA. Rik -----Oorspronkelijk bericht----- Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] Namens Ade Vickers Verzonden: woensdag 28 mei 2008 18:38 Aan: 'General Discussion: On-Topic and Off-Topic Posts' Onderwerp: Transformer repairs 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. No virus found in this outgoing message. Checked by AVG. Version: 7.5.524 / Virus Database: 269.24.1/1469 - Release Date: 27/05/2008 13:25