Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: dougal on January 13, 2012, 04:00:07 PM

Title: A500 Bad sound
Post by: dougal on January 13, 2012, 04:00:07 PM

The sound on one of my A500s is terrible. Most games i load have muddled sound or wrong instruments playing.

I don't know if it has anything to do with it but the floppy drive is not all that good as in it sometimes refuses to recognize disks or else gives disk errors.

Title: Re: A500 Bad sound
Post by: smf on January 13, 2012, 05:41:19 PM

Bad caps?

Title: Re: A500 Bad sound
Post by: Ral-Clan on January 13, 2012, 06:10:46 PM

Well, the Paula, which controls the audio, is also in charge of the floppy drive.  So it is possible the problems are connected.  My first suspicion with the floppy would be dirty / misaligned heads & rails though.

Title: Re: A500 Bad sound
Post by: freqmax on January 13, 2012, 10:26:53 PM

Chip loose?

Title: Re: A500 Bad sound
Post by: dougal on January 13, 2012, 10:48:48 PM

I tried another floppy drive and same results. But i noticed some traces look damaged. Don't know how as there is no battery on this old REV 5 A500.

I had paid 2 Euros for this Amiga from a carboot sale. It is very very dirty, filthy, dusty and the RF shield is all rusty and the floppy drive has corrosion (not rust). It must have been stored in a very damp place.

Title: Re: A500 Bad sound
Post by: freqmax on January 13, 2012, 11:09:56 PM

Clean it!
Alcohol is a tip. It's used in the electronics industry.

But I'm sure others can give better hints.

Title: Re: A500 Bad sound
Post by: Tenacious on January 13, 2012, 11:19:46 PM

Yeah, I would clean all the connections, reseat chips, etc.  Have you checked the power supply rails with a meter while it is running?

Title: Re: A500 Bad sound
Post by: freqmax on January 13, 2012, 11:39:45 PM

One should clean the circuit board as well because dirt may be conductive.