Macintosh Portable Power Supply CR-76U

campbellashe

New Tinkerer
Sep 8, 2025
11
3
3
Working on various parts of my Macintosh Portable as I await RAM to replace on my board.....
This is the M5136 (CR-76U) from my non back lit version.

Is this salvageable? Should I just Dremel the lower part off and re-tin it....


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PL212

Tinkerer
Dec 25, 2022
52
39
18
I recap'ed my Portable power supply that was in similar/worse condition... one tip is to (carefully!) do an output voltage test before you re-glue the case together, in case any adjustment is needed. Be careful of course as the line voltage is right there and lethal until the case is re-sealed.
 

campbellashe

New Tinkerer
Sep 8, 2025
11
3
3
Well removing the Sony transformer I lost some legs -- they were pretty brittle. Anyone have a similar issue and fix it?
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