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03-09-2010, 04:14 AM
| | Registered User | | Join Date: Jul 2003 Location: Keighley, W.Yorkshire, England | |  What is CN2 for on the EHX Micro POG's circuit board? (Photo content)
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Exactly as the thread title. Just took a glance at the circuit board of my EHX Micro POG and on there, is a little 5 pin connector.
I'm just being inquisitive. It's got to be for something. Anybody know, or fancy having a theorise.. 
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03-09-2010, 04:47 AM
|  | Vinny Boombats | | Join Date: Jul 2007 Location: Toronto Ontario, Canada | | | Usually these are used for brining in external power either AC or DC. If you notice further down there is an unpopulated CN3.
I'm not to familiar with the EHX but, is the plug/connector beside CN2 for the power cord? If so then CN2 could be used to supply power to a daughter board (a second board installed), or component.
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03-09-2010, 05:13 AM
| | Registered User | | Join Date: Jul 2003 Location: Keighley, W.Yorkshire, England | | | Yeah, that's what I initially thought. I wonder....you don't usually put connectors on a circuit design just for fun.
Daughterboard..hmm. If you were a daughterboard that connects to the circuit of an octave effect, what would you be?
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Last edited by Femto : 03-09-2010 at 05:14 AM.
Reason: Yes, the connector next to CN2 is the socket for the power supply.
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03-09-2010, 01:22 PM
|  | Registered User
Owner, Iron Ether Electronics | | Join Date: Dec 2002 Location: LA US | | | They use the same board for several of their digital pedals, which is cheaper than having different boards for everything. Then they only populate the areas of the board that are needed for that particular circuit. Note for example the unpopulated U7 next to U9, and CN3.
In this case I'd guess it's a test point. A testing fixture connects to CN2, pipes some signal through and measures what comes out to make sure the board is operating properly.
Last edited by Taylor Livingston : 03-09-2010 at 02:44 PM.
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03-09-2010, 02:06 PM
| | Registered User | | Join Date: Jul 2003 Location: Keighley, W.Yorkshire, England | |  Yeah, I'll go with that. Thanks.
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03-09-2010, 02:07 PM
| | Registered User | | Join Date: Jun 2006 Location: Halifax, Nova Scotia | | Quote:
Originally Posted by conical johnson  They use the same board for several of their digital pedals, which is cheaper than having different boards for everything. Then they only populate the areas of the board that are needed for that particular circuit. Note for example the unpopulated U7 next to U9, and CN3.
In this case I'd guess it's a test point. A testing fixture connects to CN2, pipes some signal through and measures what comes out to makes sure the board is operating properly. | This.
Probably a test point for calibrating the pedal before it leaves the factory.
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03-10-2010, 09:02 AM
| | | | could also be used to power the boards during the burn in. Burn in is when a device is powered up for a pre determined amount of time, usually 8-16 hours, and usually in a really warm room. Kind of a stress test. But using it to power up at testing/ calibration stations is very likely. | | Thread Tools | Search this Thread | | | | 
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