charlesapex
Newbie
- Credits
- 21CR
Hi all,
A big thanks to Gunblade for his assistance so far with my first chassis repair.
The monitor worked for about a week or two after I got the machine, but conked out after that, it was sold as non working so can't complain.
I have given the chassis and neck board a full recap, reflowed a load of old old solder joints and a new flyback. I got power to the monitor and can use it again, however the red colour is the only problem.
I thought maybe it was the red gain or cutoff pot that was faulty. I swapped those around with a working colour (blue), but didn't make any difference. I have replaced the colour transistors on the neck board as well - green was faint and the replacement fixed it. I replaced the red, but again didn't make any difference. I've tried different variants of contrast etc.
I've used 3 different jamma boards with colour bars in test, they all give a similar result with the red.
Any suggestions welcome - please see pics.
A big thanks to Gunblade for his assistance so far with my first chassis repair.
The monitor worked for about a week or two after I got the machine, but conked out after that, it was sold as non working so can't complain.
I have given the chassis and neck board a full recap, reflowed a load of old old solder joints and a new flyback. I got power to the monitor and can use it again, however the red colour is the only problem.
I thought maybe it was the red gain or cutoff pot that was faulty. I swapped those around with a working colour (blue), but didn't make any difference. I have replaced the colour transistors on the neck board as well - green was faint and the replacement fixed it. I replaced the red, but again didn't make any difference. I've tried different variants of contrast etc.
I've used 3 different jamma boards with colour bars in test, they all give a similar result with the red.
Any suggestions welcome - please see pics.
