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Home Forums Macintosh 128k 240v Analog Board Component Identification — #27 Macintosh 128k 240v Analog Board Component Identification — #27
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Good evening,

I have replaced most of the capacitors on the analog board; these include:

R uf V

C1 3.9 25 with 3.9uf 250v axial

C2 4700 16

C3 220 16

C24 2200 16

C27 2200 10

C28 1000 16

C30 2200 10

C31 220 16

C32 2200 16

C45 470 10

C42 470 10

I have not replaced C11: 10uf 160uf or the four large capacitors in the middle of the board: 100uf 200v.

Also the two components that failed, 2SC3260 and a RIFA metallised film capacitor, have been replaced.

For the first time in a while I reassembled the Macintosh and turned it on. Nothing, no chime or any indication that the Mac was alive. Nothing happens when the brightness knob is turned.

I have tested voltages on the floppy port and they all read under 1.00v.

I've compiled a list of capacitors on a spreadsheet which I will try to upload to the forums.

I really don't know where to start to solve this next problem? Any ideas would be much appreciated!

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mp.ls