mtc 9110 (I think) image is pulsing

shatter1

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It's labeled mtc9000 but from the reading I did, I believe it is a 9110. From what I read all 9110's have the fans installed? Please correct me if i am mistaken.

Anyway, I have the monitor working and have the image set pretty good. The problem is that the image is pulsing. It appears to be getting brighter for short periods and the image grows when it gets brighter. The brightness will go up and down on it's own. I don't work on these very much so I'm a bit lost. Other then this issue the image looks pretty good.

Any help would be appreciated.

thanks!
 
Try rotating the brightness pot (RV7) on the chassis, fully in both directions a few times, could be a bad contact on the wiper of the pot.

It is a 9110 btw, just an uprated version of the mtc9000, for 25 & 28" tubes
 
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