Macintosh Portable, Re-work.

[uniserver]

I have done many re-caps of these so far.

In fact i have an 11 board job coming.

I'v noticed re-work on many of these boards, both the 5120 and 5126.

Replaced Regulators

Replaced VLSI chips

Replaced ROM chips.

Wrap directly from the 68000 cpu to an other i/c.

I am wondering if these re-works were apple care or factory.

Seems like the whole Macintosh Portable idea was a bit of a mess… and super expensive too.

6 / 7 K for one.

 

[Trash80toHP_Mini]

It's likely the patch wiring was factory fresh, some of the component rework as well. Productions runs were relatively small (price premium vs. economies of scale) and rework was common practice. Folks rarely opened Macs, or any other computers, just to look at the insides back in the day. Few installed upgrades, RAM or Cards in the Portable era, much less so in the later PowerBook era and those that did so were old hand micro geeks who almost expected to see patchy repair jobs.

That's my take on it anyway. With current fab methods, high production runs and impractical repair methodology, chucking a completed board reject is the least expensive option. This was not always so.