3200 has 2 channels that have intermittent static?

[Craighuddy]

Just started tonight.
I have channels 1-16 routed to M/L ins and channel 3-4 suddenly start having random static bursts in them. I have unplugged the snake from the back but the bursts are still there. Any idea what would be causing this or if I can fix it?
Thanks.
CH

 

[Jarno]

First you should check where the problem is:
Route something elseto ch3/4.
* If the noise is still there, the problem is in DSP engine, which might be imposssible to fix yourself.
* If the noise is gone, problem is in analog section (preamps), which can be fixed by skilled electronic technician.

 

[berl]

I will add this to Jarno's answer :
I had problems that came from the jack insert itself.
Try to clean the DM internal contacts of the insert jack with F2 or other.

 

[Craighuddy]

I'm thinking in might be heat related and in the pre. Today after desk was off over night and temps were cooler it never missed a beat. It was a long hot session last night when it failed. Setting the ins on channel 3-4 to nill or any other source stopped it last night when it was hot. I'll have to keep an eye on it. Thanks guys!

CH

 

[Will Miho]

When the weather changes or it gets humid, often the tiniest bit of dirt in a mic pre knob or connector will make noise. The "shumutz" factor. First thing to try is twisting the micpre knob a few times, reseating the mic cables a few times, plugging something in and out of the insert jack.