Hanatarex MTC 900E help! (video included)

andy251203

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I got an Outrun cab in a trade a few months back. The picture was very good in it. It was all original caps/flyback. One day the picture started to "bloom", get really large and bright, and then go back to normal. It keeps going back and forth between "blooming" and normal.

Tried capping it, no difference. Tried a new flyback, waste of money, no effect. I even touched up every solder point on the flyback PCB (FYI there's two separate boards on the chassis, the flyback board and the video input board) with no effect.

I posted a video on youtube to show what the monitor is doing. I have absolutely no idea on how to tackle this. Anyone have any ideas?

http://www.youtube.com/watch?v=wLLYOAj_EIE
 
No, havent tried those things yet. I guess I'll start with the HOT and regulator. Dunno if it's worth rejuving the tube. Don't know anyone who can do it besides a TV repair shop, and they'd want top dollar.
 
Mega bump from the dead...

I finally got this monitor out of storage and decided to take another stab at it. I ordered a new TIPL751 from an ebay seller in the UK. Finally arrived yesterday. While I was installing it, I noticed the wires going from the board to the very large white power resistor were very frayed and nearly detached. They look like they were burnt. Replaced them. Fired the monitor up and the problem is fixed! Dunno if the transistor was actually at fault, or if it was just the frayed wires.

And then disaster strikes! While replacing the neckboard, pin 1 on the tube completely broke off! I nearly had a heart attack! A perfect burn-free tube! Googling around I found out that pin 1 is usually the focus adjustment pin, which makes sense. I went ahead and fired up the monitor with the broken pin, and I am now having difficulty fine-tuning the focus. The broken pin is still inserted, and it may be making partial electrical contact.

For now the focus seems to be OK, but I guess only time will tell if this broken pin will be problematic. Lesson learned: be extremely careful when removing or installing neckboards, and try not to do it a lot.
 
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