A600 no sound

[Castellen]

The A630 shouldn't effect the analogue audio stage in any way.  It only effects the data and address bus, plus various CPU control lines.
Also I've got one in my A600 and it runs fine.

I've repaired a few A600 with low/distorted audio faults caused by leaking electrolytic capacitors.  The 22µF ones are particularly bad.

Look for dark staining or discolouration on the soldered legs of the SMD capacitors (the silver aluminium ones).
Leaking capacitors have a very strong fish odour when you heat the terminals to desolder them.

Failing that the audio stage is fairly simple, just a few op-amps, which are easy to fault find.
Check the -12V supply is present, as the op-amps use this as one side of their dual rail supply.

Schematics here if you need them:
http://amiga.serveftp.net

Let me know if you need more info.

[Castellen]

Yeah, sometimes the pins in the square power socket can get bent outwards, making a poor contact.
It's not the best connector, but does a reasnoble job.

Normally if the -12V is missing, you'll still get half the audio waveform, but it'll of course sound badly distorted.


As for repairing the A600 (replacing capacitors).  Probably wouldn't be worth paying someone to do it professionally, as it would cost more than the A600.

Despite what you think, you can remove SMD electrolytics without proper rework tools.  Usually the best way is two soldering irons to heat both terminals at once.
Then just use solder wick to clean off any old solder, repair any open circuit tracks and vias as necessary.  Place a new capacitor and use a normal soldering iron to reattach it.
Obviously you need some semi-decent soldering skills to begin with :-P

I've heard it suggested you can remove the capacitors by "twisting" them off.  I wouldn't suggest this as it's very likely to lift PCB pads and tracks.