Mpc60 noise while playback

Hey there,
Yesterday my Mpc 60 made some noise in the background while playing the song I made. The noise is not connected to certain samples and also not connected to the master volume of the MPC. Does anyone know anything about solving this problem?

Flo

So the noise is there although the volume is down?? Does it sounds like a very high buzz?
Then I would say its the inverter of the display backlight. You can search here. There are some threads about inverters.


peace

I think the best way to describe it is a recording :
http://www.box.net/shared/mtig597okc

I know about the Inverterer and Backlight foil sound I had this earlier but this now sounds different.. like bad condensors or so

Perhaps someone else had the same issue

Do you actually hear the noise?

I can't hear much on my computer speakers -- I hear some crackling but it sounds like a vinyl sample to me.

Damn, it was good for while and I thought it was occured by a grounding problem. Now its there again. Some strange noise coming up while a sample is played, (not a specific one but if any sample is playing the some comes up sometimes. This is **** up. Does anyone know what i can do now?

Could it be a bad RAM chip or chips? If you fully load up the machine memory with samples, is the problem more obvious/continuous?

There was a thread where skylab001 was investigating this phenomenon. You may want to contact him to see if he figured it out.

viewtopic.php?f=4&t=123414

I m kinda shocked right now. The MPC plays crackling noises and the samples without play being pressed. I just hear this stuff when i amplify the signal with my mixer.

Could be Ghost in Machine issue. Could also be bad ram, or a bad hack. have you opened your 60 to see if it has the memory hack?

Hey, thanks for you answer.
Yes I opened the machine, the ram board looks like an official expansion or are they difficult to distinguish?

I hope that these mystic things with ghosts can be solved anytime otherwise sooner or later all mpc 60s will be the home of a ghosts.

SV1200 wrote:Could be Ghost in Machine issue. Could also be bad ram, or a bad hack. have you opened your 60 to see if it has the memory hack?

Although it could be an issue with the RAM expansion, it's not likely as some users have swapped RAM and have had the same issue.

The main issue that people have with the performance of the "memory hack" is due poor soldering work. My "hack" job in my 60II is still going strong after 2+ years.

Crackling in the audio path could be due to a bad connector, a bad capacitor, or a bad solder joint. Electronic components do change and drift over time. Remember these machines are 20+ years old!

yeah but how can I find out i a component is defect? I understand the electronic components, is there a way to check the capacitors besides changing them all?

Flub wrote:yeah but how can I find out i a component is defect? I understand the electronic components, is there a way to check the capacitors besides changing them all?

Take a good look at the components, looking for broken, burnt, puffy or burst electrolytic capacitors. It is very hard to accurately measure capacitors in series without something like a lcr meter. Most electrolytic caps dry up or change value after time -- at some point they will need to be changed -- this is just the nature of electronics.

Flub wrote:I m kinda shocked right now. The MPC plays crackling noises and the samples without play being pressed. I just hear this stuff when i amplify the signal with my mixer.

Is it in all parts of the audio path (stereo outs, individual outs, etc) or just the main L/R?