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#1 2015-09-30 17:55:22

Schmoburger
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From: Australia
Registered: 2015-04-21
Posts: 281
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Flyback transformers for Macs that never really had them?

It is no secret that during the late 90's and early 2000's, before LCD displays became the way of the future, that Apple products with CRT's had some really bad flyback circuitry, which is rather a shame given that among the affected equipment were some of the best CRT's in existence. iMacs,  5x00-series Powermacs, blue and graphite Studio Displays, G3 AIO's... all will eventually succumb to bad transformers and cease to function one day or another, and many already did very early in their lives.

In adition to the failed transformers, they usually seem to blow a few other components on their way out the door. These themselves arent necessarily a big issue to replace, however The question I ask is this... are there suitable replacement transformers themselves still available for the various models of equipment on which they readily fail??

They really are the Achilles heal of so many otherwise exemplerary machines, in particular the iMac G3 and the Diamondtron-based Studio Displays of the early 2000's, so it'd be great if an avenue of supply exists to obtain them.


Stay hungry... Stay foolish.
G5 2.0DC, Yikes G4/500 Sonnet-Enhanced, B+W G3/450, 9600/200MP, 7600/200, iMacs DVSE Graphite and 600 Snow, 7220/200, WGS 7350/180, 6360/160, 5500/250 DE, Pismo, 2x Lombards, 6100/66DOS, 2x CC's, 3x Pluses, 512K, SE/30, SE Superdrive, 2x Classics, IIvx, IIci, IIsi, 3x LC520, 4x LC575, 5x P580, LC, LCIII, //gs LE, 2x ROM 02 //gs', IIe... and I'm outta characters!

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#2 2015-09-30 18:05:25

mcdermd
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From: Corvallis, OR
Registered: 2014-05-12
Posts: 950
Website

Re: Flyback transformers for Macs that never really had them?

It's just the nature of the beast. Flybacks are a common failure for lots of CRT displays, not just Apple kit. You'll most likely see the HOT blow if you get a bad flyback.


Daily Drivers: 27" iMac 2.8 GHz Quad-Core i7 (Late 2009), 21.5" iMac 2.7GHz Quad-Core i5 (Late 2013), 11" Macbook Air 1.6 GHz i5 (Mid-2011)
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#3 2015-09-30 18:16:50

bbraun
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Registered: 2014-05-29
Posts: 1,064
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Re: Flyback transformers for Macs that never really had them?

I don't know about availability for the powermac era machines, but uniserver pointed out replacements for the 128k-SE/30 era machines in this thread.
If you do locate replacements, I would be curious.  For some bizarre reason I've gotten a desire for a 5x00 series machine.

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#4 2015-09-30 20:05:17

Schmoburger
Member
From: Australia
Registered: 2015-04-21
Posts: 281
Website

Re: Flyback transformers for Macs that never really had them?

Mmmmm I did locate some part numbers for the Rev. A-D iMacs on doing a search.... not entirely sure how old the resource was that I was reading however. It's quite likely the writeup was from 10 or more years ago.

http://www.gileskennedy.com/panthereats … sembly.htm or thereabouts

Tbh, I still  think the 5500 is among my favourite oldworld PowerMacs, as they are a nice package... especially the DE.  Shame about the flyback issues and such. sad


Stay hungry... Stay foolish.
G5 2.0DC, Yikes G4/500 Sonnet-Enhanced, B+W G3/450, 9600/200MP, 7600/200, iMacs DVSE Graphite and 600 Snow, 7220/200, WGS 7350/180, 6360/160, 5500/250 DE, Pismo, 2x Lombards, 6100/66DOS, 2x CC's, 3x Pluses, 512K, SE/30, SE Superdrive, 2x Classics, IIvx, IIci, IIsi, 3x LC520, 4x LC575, 5x P580, LC, LCIII, //gs LE, 2x ROM 02 //gs', IIe... and I'm outta characters!

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