Login / Register
 
Software glitch malfunctioning faders or circuitry?
New Reply
Subscribe
skillz335
Thread Starter
#1
14th February 2013
Old 14th February 2013
  #1
Lives for gear
 
skillz335's Avatar
 
Joined: Sep 2012
Location: the stratosphere
Posts: 1,404
My Recordings/Credits

Thread Starter
skillz335 is offline
Software glitch malfunctioning faders or circuitry?

Hey Guys,

I have a MV 8800 that when I go to the mix section to edit, the software values of the levels corresponding to 4 of the 8 faders are constantly jumping around. the 4 effected faders are 1 2 3 and 4. To make it worse when I move fader 2, 3's value will change as well. the same happens when i move fader 4, some times fader 4 moves 5. the glitch aslo affects automation.
Ive tried reformatting, resting to factory default, cleaning the MV with compressed air. same issue. Is there anything I could do to hopefully fix this problem myself. or am I going to have to go to a electronics repair shop?
#2
14th February 2013
Old 14th February 2013
  #2
Gear nut
 
Joined: Nov 2012
Posts: 101

ArKay99 is offline
It sounds like there is a noisy multiplexer on the input of whatever adc is being used for those faders. The clue is when moving one fader, the next one's values move. Your best bet would be to take it to a recommended repair shop. JMHO.
skillz335
Thread Starter
#3
15th February 2013
Old 15th February 2013
  #3
Lives for gear
 
skillz335's Avatar
 
Joined: Sep 2012
Location: the stratosphere
Posts: 1,404
My Recordings/Credits

Thread Starter
skillz335 is offline
no chance im going to fix that. I have the technical ability of a chimp. thanks for the reply, I was hopeing to not have to take it to be repaired. Especially since the device has been discontinued. would it be cheaper to spend 500 bucks on ebay for a used 8800?
#4
15th February 2013
Old 15th February 2013
  #4
Gear nut
 
Joined: Nov 2012
Posts: 101

ArKay99 is offline
Quote:
Originally Posted by skillz335 View Post
no chance im going to fix that. I have the technical ability of a chimp. thanks for the reply, I was hopeing to not have to take it to be repaired. Especially since the device has been discontinued. would it be cheaper to spend 500 bucks on ebay for a used 8800?
I doubt that it would cost $500 to fix. It could be something as simple as a dirty board interconnect. On the other hand it could be a board level issue because it's all surface mount. I don't know the device, but I seriously doubt it would cost you all that much to repair, IF you got it to a reputable shop.
skillz335
Thread Starter
#5
15th February 2013
Old 15th February 2013
  #5
Lives for gear
 
skillz335's Avatar
 
Joined: Sep 2012
Location: the stratosphere
Posts: 1,404
My Recordings/Credits

Thread Starter
skillz335 is offline
I really appreciate your help. after researching what you said, and if i understand correctly,. I wouldn't know where to locate or isolate any bad soldering, but would trying to clean the board with isopropyl alcoho help? I already tried compressed air. also if with the alcohol would I just need to clean in the general area of the faders or should I just go over everything on the circuit board?
Thanks again,
Aaron

Last edited by skillz335; 15th February 2013 at 07:56 PM.. Reason: misspell
#6
15th February 2013
Old 15th February 2013
  #6
Gear nut
 
Joined: Nov 2012
Posts: 101

ArKay99 is offline
Quote:
Originally Posted by skillz335 View Post
I really appreciate your help. after researching what you said, and if i understand correctly,. I wouldn't know where to locate or isolate any bad soldering, but would trying to clean the board with isopropyl alcoho help? I already tried compressed air. also if with the alcohol would I just need to clean in the general area of the faders or should I just go over everything on the circuit board?
Thanks again,
Aaron
No. I was thinking there may be a connector linking sections of the mixer together. There could be a poor or 'noisy' connection carrying the signals used for the troublesome circuit. Sometimes a connector or pin will get tarnished and cause what's known as a high impedance connection. Sometimes just unplugging and re-plugging the connector will clean the connection by the scrubbing action of the two surfaces, the pin and the socket will clean themselves. You have to exercise great caution though as most of these circuits are static sensitive and you could zap a chip without knowing it and be in worse shape than what you started with. I wouldn't go cleaning the faders with alcohol as they have motors and grease/lube for both the track and the movement and the alcohol could dry out the bearings. Also, if you've already blown it out, I don't think you have a dirt problem.

My best advice at this time would be to get it in front of someone that knows about the device and has a schematic. It most likely has a lot of surface mount components and they take a different set of skills to repair than the older through hole componentry.
skillz335
Thread Starter
#7
15th February 2013
Old 15th February 2013
  #7
Lives for gear
 
skillz335's Avatar
 
Joined: Sep 2012
Location: the stratosphere
Posts: 1,404
My Recordings/Credits

Thread Starter
skillz335 is offline
cool thanks for all the help im going to do a bit of research now. and much thanks for the explanation. after some reading, Im off to find a shop.
#8
17th February 2013
Old 17th February 2013
  #8
Gear nut
 
Joined: Nov 2012
Posts: 101

ArKay99 is offline
Quote:
Originally Posted by skillz335 View Post
cool thanks for all the help im going to do a bit of research now. and much thanks for the explanation. after some reading, Im off to find a shop.
Just a suggestion, why not ask for an estimate before you turn the gear in to repair? Go to a few shops, that way you'll have a better idea of who wants your money, and who wants your business.
New Reply Submit Thread to Facebook Facebook  Submit Thread to Twitter Twitter  Submit Thread to LinkedIn LinkedIn  Submit Thread to Google+ Google+ 
 
Topic:
Thread Tools
Search this Thread
Search this Thread:

Advanced Search
Similar Threads
Thread
Thread Starter / Forum
Replies
AlexLakis / So much gear, so little time!
61
jsteiger / Geekslutz forum
11
chrisj / So much gear, so little time!
5
heartsbleedblue / High end
3
CareerTech1 / So much gear, so little time!
15

Forum Jump

SEO by vBSEO ©2011, Crawlability, Inc.