Amiga 4000 Paula Audio

CU_AMiGA · 22 February 2007, 12:10

Hey Yo!

Upon getting my Amiga 4000 back from repairs yesterday, i have now experieced further bad luck. I installed the CSMK3 and Picasso IV just fine. I had trouble setting up CD audio to the Picasso but found it in the end. Now further disaster has struck! I noticed this morning, that the Paula audio coming from the Picasso external speakers are very quiet - so quiet that i have to turn the speakers volume up full blast to hear slight audio. I know for a fact it wasn't like this yesterday as i was running OctaMED from an old Amiga coverdisk and the audio was fine then. Is my Paula chip blown? Can i replace it easily? Help me please!

Regards

Calgor · 22 February 2007, 12:25

I had a similar sounding problem, one day it was fine, the next it went quiet/distorted.

Also have a picasso iv and it was the motherboard providing bad paula audio source, while the cdrom sound thru the picasso was fine.

I sometimes wonder if it was fitting the picasso iv etc that caused the problem to the motherboard.

http://eab.abime.net/showthread.php?t=20673

Zetr0 · 22 February 2007, 12:26

Heys CU

hmmmmmmm

this sounds familiar.... have you tried it without the csmk3 and picasso 4 ?
does the sound return to normal?

if so i believe it could be a power problem. you made need either a newer PSU or a higher rated PSU...

Zetr0 · 22 February 2007, 12:33

wow, looks like you a4k sound problem put you through the ringer Calgor!

Calgor · 22 February 2007, 12:41

Yeah, and i been too busy to send m/board to fix it up, if only AOS4 had come for classics then i would have been bothered, and also done some programming too

@CU_AMIGA
If it doesn't come good as Zetro suggested, then it may be the audio prob i provided in the link. I have 2 a4000s with that slightly similar problem. Don;t know how to diagnose for sure whether the latter is the prob unless u handy with multimeters etc.

CU_AMiGA · 22 February 2007, 12:59

Hi

Thanks for the replies. The only thing i can do is email the guy from France and see if he can help me out. I will try without the Picasso IV and see if i get anywhere. I was questioning the PSU yesterday actually as it seems very noisy indeed. Maybe it's that.

Regards

Zetr0 · 22 February 2007, 14:46

@CU

fingers *crossed* my friend

keropi · 22 February 2007, 15:24

psu can certainly cause audio probs, I faced it once.... I also sent a 4000 motherboard to JJB, he fixed it fine, but was pricey...
I wish u good luck!

CU_AMiGA · 22 February 2007, 15:53

Right done some investigation here. It lloks as though it is the PSU. I unplugged the CD-ROM drive and Hard Drive and i booted an amiga coverdisk with OctaMED tunes onit it and i get perfect sound. Now when i connect everything back up i either gets low volume sound output or sound output on either right or left (not both). So on evidence here it points to the PSU. Which begs the question, where can i get a spare Amiga 4000 PSU? Is this PSU i have either not enough power to power everything back up or is it just old age?

Regards

alexh · 22 February 2007, 16:24

You could try to modify a modern ATX PSU but that may be beyond your capabilities.

For a cost you can buy a ready made adapter.

Make sure you buy an ATX PSU that will fit in your A4000D case.

keropi · 22 February 2007, 16:43

I have a thread on prb.hardware.pics subforum showing how I fitted a mATX psu on my 4000D...

CU_AMiGA · 22 February 2007, 16:45

Quote:

Originally Posted by alexh

You could try to modify a modern ATX PSU but that may be beyond your capabilities.

For a cost you can buy a ready made adapter.

Make sure you buy an ATX PSU that will fit in your A4000D case.

Yes i was afraid of that. Is there any ATX PSU that size? And where would i put the switch?

musashi5150 · 22 February 2007, 16:51

Quote:

Originally Posted by CU_AMiGA

Is there any ATX PSU that size? And where would i put the switch?

Most ATX have a little black switch on the back - it would be easiest to live with that

CU_AMiGA · 22 February 2007, 16:58

I mean the switch that connect to the long plastic switch for the on/off switch at the front of the a4000!

CU_AMiGA · 22 February 2007, 16:59

keropi method looks pretty good. It doesn't require too much handy work does it? You knoe not using the dreaded soldering iron?

musashi5150 · 22 February 2007, 17:06

Quote:

Originally Posted by CU_AMiGA

I mean the switch that connect to the long plastic switch for the on/off switch at the front of the a4000!

That's what I meant, you don't bother with that switch anymore

But if you have another way then go for that.

CU_AMiGA · 22 February 2007, 17:13

I see, i totally missed the point. But i am gonna be a little fussy maybe. It would seem daft having a switch at the front and it not doing anything. I might look into keropi idea.

keropi · 22 February 2007, 17:38

there is no soldering iron on my "method"

just get an amiga4000->atx converter, it takes care all the power switch probs, and u get to use the front switch as normal...
but u need to cut the original psu case, mind that....

CU_AMiGA · 22 February 2007, 17:45

Cut it a? Would this require any special tool?!

keropi · 22 February 2007, 18:01

you need something to cut a small part of metal, I don't know how it is called in english, you can use either an electrical tool or special metal scissors...
anyway u can bypass the cutting and just remove the side and up cover that can be dissasembled... I have made adjustments now and I have a 2,5" 40GB HD under the mATX psu, if u don;t want to do that, u don't need to cut anything I guess...

22 February 2007, 12:10	#1
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	Amiga 4000 Paula Audio Hey Yo! Upon getting my Amiga 4000 back from repairs yesterday, i have now experieced further bad luck. I installed the CSMK3 and Picasso IV just fine. I had trouble setting up CD audio to the Picasso but found it in the end. Now further disaster has struck! I noticed this morning, that the Paula audio coming from the Picasso external speakers are very quiet - so quiet that i have to turn the speakers volume up full blast to hear slight audio. I know for a fact it wasn't like this yesterday as i was running OctaMED from an old Amiga coverdisk and the audio was fine then. Is my Paula chip blown? Can i replace it easily? Help me please! Regards

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22 February 2007, 12:25	#2
Calgor (Amigas && Amigos)++ Join Date: Sep 2005 Location: Anrea Posts: 999	I had a similar sounding problem, one day it was fine, the next it went quiet/distorted. Also have a picasso iv and it was the motherboard providing bad paula audio source, while the cdrom sound thru the picasso was fine. I sometimes wonder if it was fitting the picasso iv etc that caused the problem to the motherboard. http://eab.abime.net/showthread.php?t=20673

22 February 2007, 12:26	#3
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	Heys CU hmmmmmmm this sounds familiar.... have you tried it without the csmk3 and picasso 4 ? does the sound return to normal? if so i believe it could be a power problem. you made need either a newer PSU or a higher rated PSU...

22 February 2007, 12:33	#4
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	wow, looks like you a4k sound problem put you through the ringer Calgor!

22 February 2007, 12:41	#5
Calgor (Amigas && Amigos)++ Join Date: Sep 2005 Location: Anrea Posts: 999	Yeah, and i been too busy to send m/board to fix it up, if only AOS4 had come for classics then i would have been bothered, and also done some programming too @CU_AMIGA If it doesn't come good as Zetro suggested, then it may be the audio prob i provided in the link. I have 2 a4000s with that slightly similar problem. Don;t know how to diagnose for sure whether the latter is the prob unless u handy with multimeters etc.

22 February 2007, 12:59	#6
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	Hi Thanks for the replies. The only thing i can do is email the guy from France and see if he can help me out. I will try without the Picasso IV and see if i get anywhere. I was questioning the PSU yesterday actually as it seems very noisy indeed. Maybe it's that. Regards

22 February 2007, 14:46	#7
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@CU fingers crossed my friend

22 February 2007, 15:24	#8
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	psu can certainly cause audio probs, I faced it once.... I also sent a 4000 motherboard to JJB, he fixed it fine, but was pricey... I wish u good luck!

22 February 2007, 15:53	#9
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	Right done some investigation here. It lloks as though it is the PSU. I unplugged the CD-ROM drive and Hard Drive and i booted an amiga coverdisk with OctaMED tunes onit it and i get perfect sound. Now when i connect everything back up i either gets low volume sound output or sound output on either right or left (not both). So on evidence here it points to the PSU. Which begs the question, where can i get a spare Amiga 4000 PSU? Is this PSU i have either not enough power to power everything back up or is it just old age? Regards

22 February 2007, 16:24	#10
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,379	You could try to modify a modern ATX PSU but that may be beyond your capabilities. For a cost you can buy a ready made adapter. Make sure you buy an ATX PSU that will fit in your A4000D case.

22 February 2007, 16:43	#11
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	I have a thread on prb.hardware.pics subforum showing how I fitted a mATX psu on my 4000D...

22 February 2007, 16:58	#14
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	I mean the switch that connect to the long plastic switch for the on/off switch at the front of the a4000!

22 February 2007, 16:59	#15
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	keropi method looks pretty good. It doesn't require too much handy work does it? You knoe not using the dreaded soldering iron?

22 February 2007, 17:13	#17
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	I see, i totally missed the point. But i am gonna be a little fussy maybe. It would seem daft having a switch at the front and it not doing anything. I might look into keropi idea.

22 February 2007, 17:38	#18
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	there is no soldering iron on my "method" just get an amiga4000->atx converter, it takes care all the power switch probs, and u get to use the front switch as normal... but u need to cut the original psu case, mind that....

22 February 2007, 17:45	#19
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	Cut it a? Would this require any special tool?!

22 February 2007, 18:01	#20
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	you need something to cut a small part of metal, I don't know how it is called in english, you can use either an electrical tool or special metal scissors... anyway u can bypass the cutting and just remove the side and up cover that can be dissasembled... I have made adjustments now and I have a 2,5" 40GB HD under the mATX psu, if u don;t want to do that, u don't need to cut anything I guess...

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