mulletchuck

help: ez1073-500 mic input clicks and pops
« on: December 23, 2011, 12:46:57 AM »
howdy.   So, one of my ez1073-500s has stopped working on the mic input circuit.   The line-input circuits work fine.   

Symptoms include:   No signal level. 
Oscillating click that gets louder if i physically touch the microphone that is connected to the module. 

Where do i start for troubleshooting?   I disassembled the unit and nothing appeared broken or unsoldered.  this unit used to work fine.   no caps appeared blown.
www.youtube.com/mulletchuck for all my recordings


Re: help: ez1073-500 mic input clicks and pops
« Reply #1 on: December 23, 2011, 11:49:25 AM »
Try another microphone and/or microphone cable before digging in too deep (you've probably already done this, I'll bet.   ...but just in case).

Slenderchap

Re: help: ez1073-500 mic input clicks and pops
« Reply #2 on: December 23, 2011, 12:12:54 PM »
Just had a mail from Chuck... it is the rack slot itself which has a bad connection.... works fine in another slot.

Colin
www.audiomaintenance.com

mulletchuck

Re: help: ez1073-500 mic input clicks and pops
« Reply #3 on: December 23, 2011, 01:52:28 PM »
that's right.   Gotta troubleshoot why this particular slot is defunct.   there aren't that many moving parts...
www.youtube.com/mulletchuck for all my recordings

pucho812

Re: help: ez1073-500 mic input clicks and pops
« Reply #4 on: December 23, 2011, 10:49:05 PM »
colin, way to be ontop of things. right on.

As for the slot
bent edge connector pin, faulty solder joint. not much else in the api 500 racks I think
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

mulletchuck

Re: help: ez1073-500 mic input clicks and pops
« Reply #5 on: December 24, 2011, 04:17:58 PM »
yeah, i'll have to de-house the backplane and check the joints for that one slot.    Right now, the Input xlr Pin tied to ground/chassis won't make a solid connection for whatever reason.   
www.youtube.com/mulletchuck for all my recordings


 

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