Amiga A600 Sound

[grobda]

had a weak audio channel; as with many early 90's caps one was dud, theyre just behind the audio output jacks;

pain to remove I ended up removing the jacks first to get at the caps

while i was in there i noticed this shoddy bit of workmanship, looks like it left the factory like this

;

miggy now happy again blasted out the turrican 2 title theme and the missus asked me if i was having an eighties meltdown.

 

[guddler]

Did you replace those two with non polarised versions? Was a design error apparently and they should be non polar.

 

[grobda]

just replaced like for like - the pcb is marked for polarity.

any reason non-polar ones should be preferable? i've only ever seen polar electrolytics tbh i didnt know non-polar ones existed.

 

[guddler]

You'd have to google it, there's a lot of debate out there on it because obviously Amiga never put out anything saying there was a design error or anything like that, but it's generally accepted that they should be non polar. If you get a kit from AmigaKit the two they supply are polarised so I guess it's nothing worth worrying about now you've done it, you just might find that they'll need doing again at some point.

When I did my 600 (just recently) I had some non-polar ones of the right value lying about so I used them. I didn't have SMT ones so I just bent the legs out into an L shape and soldered them to the pads that way. The value in question means standard radials are very small and fit just fine on their side.