Sound Problems (A500+, 1084S)

[sim085]

Hello,

Yesterday I connected the sound cables between my A500+ and the 1084S monitor. Well sound does come out, but there is something missing. It is as if not everything is being played. I do not know how to explain this ... missing notes maybe??

Does anyone know what this could be? If coming from the A500+ or the 1084S monitor? The problem is I do not have a pare of speakers which match with the amiga. The only speakers I have are for PC.

[bbond007]

Hello,

Yesterday I connected the sound cables between my A500+ and the 1084S monitor. Well sound does come out, but there is something missing. It is as if not everything is being played. I do not know how to explain this ... missing notes maybe??

Does anyone know what this could be? If coming from the A500+ or the 1084S monitor? The problem is I do not have a pare of speakers which match with the amiga. The only speakers I have are for PC.

You just need and RCa to 3.5 mm adapter like this.


http://www.ebay.com/itm/3-5mm-TRS-Female-Headphone-to-2x-RCA-Phono-Splitter-Audio-Lead-Cable-Adapter-/170805620163?pt=UK_Computing_CablesConnectors_RL&hash=item27c4ceedc3#ht_1497wt_754

[orange]

you are probably missing left or right channel. check the cables.

[sim085]

You just need and RCa to 3.5 mm adapter like this.

I had a cable like that at home. I tried it out but still the same problem.

you are probably missing left or right channel. check the cables.

I tried different cables and still the same problem.


Could it be a speaker in the 1084S monitor? Can I connect PC speakers with the A500+ easilly? (for testing)...

[Speelgoedmannetje]

You can connect pc speakers to the Amiga. Any amplifier with an AUX port will do just fine, actually.

[dougal]

Try unplugging one of the cables (either left or right) from the Amiga and see if:

A: All the sound goes
B: Remains the same
C: You can hear ALL the sound but only from 1 speaker

After try unplugging the other (left or right) cable and see if A,B or C happens. It is possible that there is a short somewhere, either in the cables or the Amiga.

[sim085]

Try unplugging one of the cables (either left or right) from the Amiga and see if:

When I remove cable from AUDIO-R sound only comes from left speaker. When I remove cable from AUDIO-L sound only comes from right speaker. I will try to find some PC speakers and see what comes out of it.

[sim085]

Connected PC speakers and the problem persisted. Therefore I must think the problem is with the A500+ does anyone know what it might be and if can be fixed?

[dougal]

Could be many things but i'm quite sure its an easy fix.

Check that all the socketed chips are pressed in place. Also check for any short near the the jack sockets on the Amiga. Could also be dry joint or broken solder.

[bbond007]

Could also be dry joint or broken solder.

I had that problem with my A500. I just had to remove the MB and reflow the solder on the RCA jacks.

Don't use those ridiculous "monster" RCA cables. They put too much stress on the RCA jacks...

[sim085]

I am afraid the acidity from the battery may still be doing damage, even though I had cleaned it. Here is a photo of my A500+ motherboard as is right now!

http://img29.imageshack.us/img29/9982/img3225ut.jpg

I will try to pull the motherboard out to see if there are any dry joints.

[dougal]

I am afraid the acidity from the battery may still doing damage, even though I had cleaned it. Here is a photo of my A500+ motherboard as is right now!

http://img29.imageshack.us/img29/9982/img3225ut.jpg

I will try to pull the motherboard out to see if there are any dry joints.

I doubt the problem has anything to do with the battery and i've got 500 Plus's which suffered worse battery damage and had no problems with the audio.

It sounds to me like you either have a short or a dry joint. Check the jacks with a digital multimeter. Try different cables. I am 99% positive there is nothing serious and you will be able to find and fix the problem easily.

If it keeps giving you hassles feel free to bring it over and i'll take a look at it

[sim085]

It sounds to me like you either have a short or a dry joint. Check the jacks with a digital multimeter. Try different cables. I am 99% positive there is nothing serious and you will be able to find and fix the problem easily.

I should have a multimeter so I'll try to see if I understand where the problem is.

If it keeps giving you hassles feel free to bring it over and i'll take a look at it

Thanks

[sim085]

Ok, found what the problem was. After playing with the multi meter for a few minutes I realised that my PC PSU (converted to work for the A500+) had the -12V not connected correctly!!! Put in everything in place a the sound is back on.

From one side I am happy since all is working, however I don't know if turning the Amiga without the -12V for these last few days may have damaged something!! The truth is that apart the sound all seemed to be working fine!!

[paul1981]

Ok, found what the problem was. After playing with the multi meter for a few minutes I realised that my PC PSU (converted to work for the A500+) had the -12V not connected correctly!!! Put in everything in place a the sound is back on.

From one side I am happy since all is working, however I don't know if turning the Amiga without the -12V for these last few days may have damaged something!! The truth is that apart the sound all seemed to be working fine!!

I think the -12V is strictly for the audio circuit, so no damage would have been done.