Macintosh 512k C20 and C5 capacitor values

[jake18125]

Bit of an odd one this. I was sent a 512k which was a little bit... erratic. Sometimes it will bong and flash the floppy icon, other times it will just get stuck on a corrupted screen. Thinking it was a RAM issue I took the logic board and found out that for some reason someone had removed C5 and C20 at some point (?!). I know there may be ram issues or potentially issues with the roms, but I just need to find the values for those two capacitors to rule that out as an issue! 

Hope you can help

 

[jake18125]

Oh just to clarify I mean C5 and C20 on the logic board. I'm baffled why someone would of removed them!

 

[jake18125]

Oops, C22! I need to find out what C22 is, not C20! 

 

[dochilli]

On my logic board C22 is a 4.7uF, 35V

 

[erichelgeson]

There was a good video just posted with all the details too