troubleshooting static in punch 45HD

damage · 6th October 2008, 03:40 AM

Hi!

I'm kinda going in blind in this one. Amp powers up. Right side plays fine. Left side plays fine a minute or two then bad static. Signal is still there, but static covers it up. adjusting gain doesn't affect the static.

I pulled the outputs to test, except I can't find any data sheet on them, SS254 and SS264. So not sure really what to do here. I touched up solder points on the cards and pretty much everywhere.

So I'm kinda stuck.

ppia600 · 6th October 2008, 03:47 AM

The area for that channel on the input board probably had leaky caps and they ate away at the board traces. Its the vertical board directly behind the rca jacks. Happened a lot on that series

Clipped · 6th October 2008, 04:02 AM

try poking around the opamps...i had an orion that would do that and it ended up being a cap(tantalum) connected to an opamp.

Perry Babin · 6th October 2008, 04:37 AM

I think ppia600 is probably correct. This ebay item will likely solve your problem.
170268245637

damage · 6th October 2008, 12:46 PM

That definitely is the problem. I know I looked at before. But upon re-inspection, I noticed a little tiny black circle around the metal cap.

Thanks ya'll!

6th October 2008, 03:40 AM	#1
damage diyAudio Member Join Date: May 2006	troubleshooting static in punch 45HD Hi! I'm kinda going in blind in this one. Amp powers up. Right side plays fine. Left side plays fine a minute or two then bad static. Signal is still there, but static covers it up. adjusting gain doesn't affect the static. I pulled the outputs to test, except I can't find any data sheet on them, SS254 and SS264. So not sure really what to do here. I touched up solder points on the cards and pretty much everywhere. So I'm kinda stuck.

6th October 2008, 03:47 AM	#2
ppia600 diyAudio Member Join Date: Jun 2007 Location: Louis y ana	The area for that channel on the input board probably had leaky caps and they ate away at the board traces. Its the vertical board directly behind the rca jacks. Happened a lot on that series __________________ Don't worry... you can always turn the gain down!

6th October 2008, 04:37 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I think ppia600 is probably correct. This ebay item will likely solve your problem. 170268245637 __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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6th October 2008, 04:02 AM	#3
Clipped diyAudio Member Join Date: Mar 2005 Location: home	try poking around the opamps...i had an orion that would do that and it ended up being a cap(tantalum) connected to an opamp.

6th October 2008, 12:46 PM	#5
damage diyAudio Member Join Date: May 2006	That definitely is the problem. I know I looked at before. But upon re-inspection, I noticed a little tiny black circle around the metal cap. Thanks ya'll!

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