MonsterBash
Well-known member
After reading a bunch of post here..I had no idea these were such a POS.
So I capped a dead one and it came back to life...the problem is with the B+ measurement.
I was getting about 94~96VDC (123VDC required) at the B+ test point. I thought that was extremely low and probably not adjustable. After removing the glue from the B+ pot..whenever I try to adjust it it goes from one extremely to the other. Just moving the POT a CH clockwise will send it to 135VDC...if i continue with moving it same direction..it will drop to 92VDC. Almost like hitting the ends of the adjustable range..but nothing in the middle.
I OHMed out the POT and it seems correct.
Double checked the CAPs and polarity
I've tried a couple DMM with the same results. I've tried grounding directly to the ground stud on the transformer and the monitor chassis
The flyback did have a small crack in it that was fixed with silicon.
As for the picture..it looks fine..every once in a while I'll get a little pulse in the screen but once it's been on for a while (say 5 minutes) that seems to go away.
Right now I have the POT set were it was glued
I'd really like to keep using this monitor as it has almost a perfect tube. VERY little..if any burn
So I capped a dead one and it came back to life...the problem is with the B+ measurement.
I was getting about 94~96VDC (123VDC required) at the B+ test point. I thought that was extremely low and probably not adjustable. After removing the glue from the B+ pot..whenever I try to adjust it it goes from one extremely to the other. Just moving the POT a CH clockwise will send it to 135VDC...if i continue with moving it same direction..it will drop to 92VDC. Almost like hitting the ends of the adjustable range..but nothing in the middle.
I OHMed out the POT and it seems correct.
Double checked the CAPs and polarity
I've tried a couple DMM with the same results. I've tried grounding directly to the ground stud on the transformer and the monitor chassis
The flyback did have a small crack in it that was fixed with silicon.
As for the picture..it looks fine..every once in a while I'll get a little pulse in the screen but once it's been on for a while (say 5 minutes) that seems to go away.
Right now I have the POT set were it was glued
I'd really like to keep using this monitor as it has almost a perfect tube. VERY little..if any burn