baritonomarc
Member
Hi all,
i am trying to figure out what is wrong in my Hantarex Polo 28 MF (dual frequency).
The monitor shows the image, does not go hot, B+ is a stable 142 V DC and voltages are correct (i measured B+ on one leg the white ceramic big resistor, TP9 → 15V, TP10 → 12V). Replaced C112 and C114 since i had them and are known to be faulty caps.
The following images can give an idea of the prob:
Essentially, it's almost impossible to get rid of those raster white orizontal/diagonal lines (even toying with the flyback knobs or the brightness/contrast pots... they are responsive, the lines can be heavier or lighter but they stay there).
As you can see, another problem is that the brigtness is different in different regions of the screen.
In addition, there's a 2 inches tall white horizontal bar on top of the image
… and the image shakes heavily vertically (non interlaced signal).
Could anyone suggest me what to check?
Thanks
i am trying to figure out what is wrong in my Hantarex Polo 28 MF (dual frequency).
The monitor shows the image, does not go hot, B+ is a stable 142 V DC and voltages are correct (i measured B+ on one leg the white ceramic big resistor, TP9 → 15V, TP10 → 12V). Replaced C112 and C114 since i had them and are known to be faulty caps.
The following images can give an idea of the prob:
Essentially, it's almost impossible to get rid of those raster white orizontal/diagonal lines (even toying with the flyback knobs or the brightness/contrast pots... they are responsive, the lines can be heavier or lighter but they stay there).
As you can see, another problem is that the brigtness is different in different regions of the screen.
In addition, there's a 2 inches tall white horizontal bar on top of the image
… and the image shakes heavily vertically (non interlaced signal).
Could anyone suggest me what to check?
Thanks
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