MX4000 problems

5 replies
Mark Scharringa
Offline
Mark Scharringa
Bronze
Posted June 17, 2009 at 07:49 GMT
#1755802

The problem is that the picture tube seems to produce a electrical/buzzing sound. It is not to loud, but my old MX3500 did not have the problem.

Is this problem easy to fix?

DI
Offline
Die_Bogener
Bronze
Posted June 17, 2009 at 13:27 GMT
#1755803

Yes. Remove the rear cover, switch off all lights, start your MX and look at the mainboard from underneath. You will probably see a light called C102 ;)

Mark Scharringa
Offline
Mark Scharringa
Bronze
Posted June 18, 2009 at 04:05 GMT
#1755804

Thanks for the reply. I am not very technical can you tell me exactly wat C102 is and wat needs to be done?

thanks a lot for your time.

D(
Offline
dan88270 (archived)
Bronze
Posted June 18, 2009 at 17:55 GMT
#1755805

 

Hi, this link can help you...

/forum/the-workbench/workshop-how-to-rebuild-a-mx4000-mx6000-mx7000-and-av9000

Thanks to Die_Bogener for this verry good help for rebuild MX...

Best,

Daniel

DI
Offline
Die_Bogener
Bronze
Posted June 19, 2009 at 10:37 GMT
#1755806

I really ment a spark next to the cap C102. You can see and hear it in the dark, that is no joke!

Sounds like Bzzzbbbzzbbzzzzz are bad solders around the high frequency of the transformer or the big blue plastic caps. It really makes sense to watch these parts in the dark. These sparks are visible.

or
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