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Hantarex MTC 9000 width problem
princess prin prin:
On authentic Hantarex chassis the silkscreening for C42 is always polarized except on the earliest version of the chassis (MZ04). I don't think you'd have problems with a polarized cap if you respect the polarization (negative to ground). The only problem with an electrolytic is that in this location there's a lot of heat and no airflow so they fail. As gunblade said Hantarex later stopped using an electrolytic here and replaced it with a film cap. They sticked to a film cap for EW filtering on their next monitor too (Polo).
CHRIS-F:
Thanks for your help, It is very much appreciated, I fitted a new cap today and I am happy with the results, as you can see from the attachment i can now shrink the width and fit the whole game on screen, I have some other issues, like my image is slightly rotated a degree or two and possibly a linearity problem on the right the border is slightly smaller than on the left, but that's a problem for another day :-)
Thanks again,
Chris.
CHRIS-F:
As both of you have mentioned a film cap, I should really get a replacement for next time it fails, is it ok to just replace that one cap with a film and leave the others, silly question but what do i search for and what do they look like? I've searched for polypropylene film caps and all i could find were yellow axial can types for use in audio.
Thanks,
Chris,
princess prin prin:
It was never implied that you should replace all electrolytics with film caps.
An axial cap is what Hantarex used as other types won't fit:
CHRIS-F:
--- Quote from: princess prin prin on July 03, 2022, 03:24:16 am ---It was never implied that you should replace all electrolytics with film caps.
An axial cap is what Hantarex used as other types won't fit:
--- End quote ---
Thanks for that conformation and sorry i should have made my question more clear, what I actually meant was, is it o.k. to only replace that particular cap C42 with a film cap or do any others in that part of the circuit or anywhere else on the board also need replacing?
Regards,
Chris.