Hello,
I had an interesting thing happen last night with my Yamaha 01V, the 4 vocal channels
were distorting. The gains were not high or any indication of clipping. I didn't have any compression on them.
The instruments, keys, guitars, drums were fine, and to top it all off the board shut down.
I muted it and rebooted no problem, anyone else ever encounter this? On the plus side my T48's were killer
Thanks,
Jim
" Everyone Has a Photographic Memory, Just Not Everyone Has Film In The Camera"
I found the problem, after search Prosound web. apparently there was a known warranty repair due to a grounding issue between two circuit boards.
The fix was as follows:
01v Re-setting Fix ~ Read Me File
Hello Folks,
Well, I finally had time to try the one wire fix thang today. I'll give
you a rundown.
Earlier 01v models have been re-setting themselves without provocation
due to a grounding screw problem. The cause was determined to be a jar to
the right side of the 01v during shipment. The temporary fix issued to
Yamaha technicians, involves a jumper wire soldered to ST201 and ST202.
These are brass grounding points with a screw in the middle of each one. The
permanent fix is replacing the motherboard. All 01v's brought in under
warranty for any repairs, had the temp fix performed on them, ordered by the
Yamaha Electronics Division.
Take the 20 case screws out, 6 on either side and 4 in the front and 4
in the back. The 01v hinges on the front. After opening, place the V on it's
left side like an open book. Doing it this way allows you to keep the 15 or
so ribbon cables intact. On the analog circuit board PN-DC you will find
ST201 and ST202. Solder the jump wire from ST201 to ST202. This operation
can be easily done by someone with basic electronics skills.
My recommendations are:
Unhook the 4 conductor power snap that is next to ST201, that's the one
with 3 white wires and 1 red one. It looks just like the power connector to
a standard IDE hard drive. This will allow you better access to ST201 and
prevent the soldering gun from accidentally touching these wires.
Use a small amount of flux as the ground points are made of brass.
It is my opinion that the fix can also be done without soldering, by anyone
regardless of electronic skills, if you slightly back the screws out of
ST201 and ST202 and connect the wire underneath the screws and then screw
them back in.
It is also my opinion that the tape used to attach the wire to the
circuit board is unnecessary, if the wire you use is coated and is the
proper length. I added the tape anyway.
As a precaution with any electronic device, always unplug it and wait 5
minutes for power to subside before opening the case.
The diagram sent to the Yamaha repair departments, is in the 01v or
TheMIx files section. It's file name is 01v Solution Fax. I'll add this
message as a Read Me to both Files sections also.
I must add that I accept no responsibility what-so-ever for anyone that
follows my instructions and recommendations. You do this entirely at your
own risk. It was a piece of cake for me though. You may e-mail me personally
for answers to any questions.
Good luck and
Keep On Trackin'
Ronny
Attachments
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" Everyone Has a Photographic Memory, Just Not Everyone Has Film In The Camera"
