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No noise
Posted: May 25th, '16, 03:49
by jbdiver
I'm having trouble getting a signal from the noise section. It's a bit embarrassing because I've worked on many builds, but have never had a problem this early in a project before.
I've checked the components and orientation. I've touched the solder pads to make sure I don't have a cold joint. I've verified the power values. When I apply power to the main board, pin 9 on IC33 (and IC32) connects to ground and stays there. Maybe a clocking issue? I'm not sure how to troubleshoot. Any advice appreciated.
Also, I just wanted to confirm the orientation for the 5218L chips. Is pin 1 to the left of the stripe?
Re: No noise
Posted: May 25th, '16, 04:33
by e-licktronic
Dear jbdiver,
IC27 is in the right way. Check +15v and -15v on IC27 pin4, 8 and +15v on IC31 pin 2 and 14, IC32 pin 14 and IC33 pin 14.
Best regards,
e-licktronic
Re: No noise
Posted: May 25th, '16, 15:01
by jbdiver
I checked all the power pins again and I'm seeing the correct values.
Re: No noise
Posted: Aug 17th, '18, 05:27
by macfadyb
Did you ever find a solution? Stuck in the same situation early in the build.
Re: No noise
Posted: Feb 7th, '19, 06:03
by liyanage
I'm stuck in a similar situation. Pin 9 on IC33 is at +15V. Some other pins have a square wave signal.
I checked the voltages above, and they are matching, except on IC27 the +15 and -15 are the reverse of what's given above.
Re: No noise
Posted: Jan 9th, '20, 20:17
by monomood
same here, all voltages as they should but unmodulated 15 V on PIN 9 of IC33. I just replaced IC33 with no change at all.
Is there any other way to trace back the signal? I want to avoid replacing IC32, too as desoldering ICs is such a pain.
Please help! Thanks in advance!
Re: No noise
Posted: Jan 20th, '20, 09:58
by monomood
Allthough the forum seems to be quite abandoned I want to share, that a faulty 14006 IC caused the problems mentioned above.
Noise is now working properly
Re: No noise
Posted: Jan 20th, '20, 14:29
by KlangGenerator
monomood wrote:Allthough the forum seems to be quite abandoned I want to share, that a faulty 14006 IC caused the problems mentioned above.
Noise is now working properly
Unfortunately most of those supplied with the kit are bad. I had 2 out of 10 working.
Re: No noise
Posted: Feb 23rd, '20, 14:19
by maglar
KlangGenerator wrote:monomood wrote:Allthough the forum seems to be quite abandoned I want to share, that a faulty 14006 IC caused the problems mentioned above.
Noise is now working properly
Unfortunately most of those supplied with the kit are bad. I had 2 out of 10 working.
A bit late finishing my build (been sitting i the shelf for over a year) but I seem to have the same issue with noise here. Anyone know where to source these 14006 IC:s?
Re: No noise
Posted: Mar 5th, '20, 20:42
by monomood
maglar wrote:KlangGenerator wrote:monomood wrote:Allthough the forum seems to be quite abandoned I want to share, that a faulty 14006 IC caused the problems mentioned above.
Noise is now working properly
Unfortunately most of those supplied with the kit are bad. I had 2 out of 10 working.
A bit late finishing my build (been sitting i the shelf for over a year) but I seem to have the same issue with noise here. Anyone know where to source these 14006 IC:s?
I got mine from ebay.
https://www.ebay.de/itm/MC14006CP-IC-18 ... SwQepbopML
https://www.ebay.de/itm/10x-MC14006BCP- ... Swy1ZdLQBg