mecha
Well-known member
this is lengthy, because I feel the need to share every little detail.
here's where I'm at. some few months ago or so I posted about a Polo that blows fuses. well I find out that little transistor on the heatsink in the power supply was the cause. I capped the monitor properly (some asshole before me had some caps installed backwards) and touched up a variety of other things.
during my quest to fix the power supply cause of the blown fuses, I borrowed a few parts from an extra 27" chassis I had. one of those being the T101, which is what stopped the fuses from blowing. I put a HOT that I thought was good in there, and well, it wasn't, it just ticked.
going based on Fromm's flowchart, I tested all the diodes and the the block caps by the HOT, and that was all fine. put the old HOT back in, the chassis actually works.
except one thing... it does this and emits an obnoxious buzzing sound.
this is not the original chassis for this monitor, the first one was one that got sent to PNL and Chad for 3 different repairs. I never got around to sending it back to Chad again. when it blew the HOT again after he fixed it, I called him about it and he suspected that maybe I had a bad yoke that could be causing it. this is the first time I've mated a working chassis to this tube since late 2009 however, and it never did anything strange before, soooooo...
how do I go about testing to make sure the yoke is fine? or could this be something where I dicked with something at the yoke plug on the chassis on accident? I checked over my work multiple times and nothing stuck out after the few little corrections I made.
would any of the power supply components I changed make a difference? I actually took a picture of what I changed after I capped it.
here's where I'm at. some few months ago or so I posted about a Polo that blows fuses. well I find out that little transistor on the heatsink in the power supply was the cause. I capped the monitor properly (some asshole before me had some caps installed backwards) and touched up a variety of other things.
during my quest to fix the power supply cause of the blown fuses, I borrowed a few parts from an extra 27" chassis I had. one of those being the T101, which is what stopped the fuses from blowing. I put a HOT that I thought was good in there, and well, it wasn't, it just ticked.
going based on Fromm's flowchart, I tested all the diodes and the the block caps by the HOT, and that was all fine. put the old HOT back in, the chassis actually works.
except one thing... it does this and emits an obnoxious buzzing sound.
this is not the original chassis for this monitor, the first one was one that got sent to PNL and Chad for 3 different repairs. I never got around to sending it back to Chad again. when it blew the HOT again after he fixed it, I called him about it and he suspected that maybe I had a bad yoke that could be causing it. this is the first time I've mated a working chassis to this tube since late 2009 however, and it never did anything strange before, soooooo...
how do I go about testing to make sure the yoke is fine? or could this be something where I dicked with something at the yoke plug on the chassis on accident? I checked over my work multiple times and nothing stuck out after the few little corrections I made.
would any of the power supply components I changed make a difference? I actually took a picture of what I changed after I capped it.