896 XLR out problem

steeler · Post by **steeler** » Tue Jan 09, 2007 11:19 am

Hi,
I've had a MOTU 896HD for about 3 years. I ran the main XLR outs to 2 channels of a mixer. I recently got a new mixer, a Mackie 1202. I set it up the same way and it worked fine. Yesterday I was moving some equipment around (not the 896) and unplugged the XLR cables. When I plugged them back in the sound was fuzzy without much volume and a there was a noticable hum. I've tried other cables, checked the inputs, etc. and everything - except the 896 outputs - is OK.
I can't believe the outputs went bad just by being unplugged and plugged in again. I've probably only unplugged them 5 times total before last night.
Any suggestions?
Thanks,
Dave

bleached04 · Post by **bleached04** » Tue Jan 09, 2007 3:46 pm

i had the same problem...my right main output was fuzzy and distorted at any volume...i had to send it back to motu...$80 service repair...

Hayman · Post by **Hayman** » Sun Jan 21, 2007 1:54 pm

The 896 has a BB DRV134 line driver IC at the outputs. I had a bad output and replaced the DRV134. Works fine now.

There is no DC blocking cap between the XLR pins and the chip. A 48V phantom power is probably what killed my DRV134.

Richard

dgbailiff · Post by **dgbailiff** » Sun Apr 22, 2007 12:37 pm

I just got back from a gig where I used my 896HD as an onstage mixer for my keyboard gear. The left main out is now faint and distorted. Do you think that it was killed by phantom power on the line?

Live and learn.

ballzar · Post by **ballzar** » Thu Jan 29, 2009 3:40 pm

Happened to me, too. DONT RUN THE OUTPUTS OF YOUR 896 OR 896HD INTO
THE INPUTS ON A MIXER WITH PHANTOM POWER ON. MOTU should really put this in the manual.

MOTUnation.com

896 XLR out problem

896 XLR out problem

Re: 896 XLR out problem