caiusfabricius
Member
Hi all,
my Philips CM8833-II monitor, which served me faithfully for many years, suddenly some time ago shut down so I put it aside.In these days I'm trying to repair it.I replaced the flyback transformer, the horizontal and vertical deflection transistor with no luck then I swapped the tube with another faulty CM8833-II and it powers up now, so the problem was the tube or the jokes.But I get the attached picture (the video signal is from an arcade PCB via RGB).I tried to adjust the FOCUS and SCREEN with no luck.I also swapped the chassis with the one of the other monitor (after replaced the LOPT, horizontal and vertical transistor also on this) but I get the same issue.
I have checked in-circuit all the electrolytic capacitors and they have good ESR.The B+ DC voltage is exactly +128V.
I'm about to give up but I'd really don't want to scrap this monitor since it's soooo good
Any help/suggestion is highly appreciated.Thanks in advance.
my Philips CM8833-II monitor, which served me faithfully for many years, suddenly some time ago shut down so I put it aside.In these days I'm trying to repair it.I replaced the flyback transformer, the horizontal and vertical deflection transistor with no luck then I swapped the tube with another faulty CM8833-II and it powers up now, so the problem was the tube or the jokes.But I get the attached picture (the video signal is from an arcade PCB via RGB).I tried to adjust the FOCUS and SCREEN with no luck.I also swapped the chassis with the one of the other monitor (after replaced the LOPT, horizontal and vertical transistor also on this) but I get the same issue.
I have checked in-circuit all the electrolytic capacitors and they have good ESR.The B+ DC voltage is exactly +128V.
I'm about to give up but I'd really don't want to scrap this monitor since it's soooo good
Any help/suggestion is highly appreciated.Thanks in advance.
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