Main > Monitor/Video Forum
Hantarex Polo diagonal lines
KaYs3r:
Hi everyone,
I have bought an "old" arcade machine, and it comes with an Hantarex Polo. I've installed a Pandora Box DX, and it works :laugh:
I'm new at this, so, the questions:
1. How do I measure the screen to know it's size? Diagonal, measuring all the glass on the screen I have 28". Is this correct?
2. As you can see on the video, when I adjust the vertical amp pot, the top horizontal lines move on top of the other lines, look at the white dots on the video. What could be the problem?
Video -> https://photos.app.goo.gl/q9zD8FGAegFUE2cd7
I've made a partial cap kit. I've found a cap kit list, but some of the caps where completly different from the ones installed on the chassis, so I looked for the schematics, and the values on the schematics where different from the cap kit, and from the ones on the chassis ???
My chassis is the one that ony has one big cap on the power supply.
I've found that diode D106 is bad, will change it. Should I look for anything else?
Thank you, and sorry for my english.
KaYs3r:
Hi everyone,
I've finished the cap kit, but no change on image.
Here's another picture, on Pac-Man.
Thanks
KaYs3r:
Hello again,
After removing the diode, I've checked that it was not bad after all, but I've installed a new one, just in case.
The problem continues.
I've disconnected the Pandora Box, and turned the chassis on, and the lines are there, as you may see on the photo.
What else should I test?
Thanks
buttersoft:
sorry, i did watch the video but it didn't twig what i was actually seeing. It looks like vertical foldover of some description. Giving that termr a google would be a good idea. Normally fixed by swapping out the vertical pump-up capacitor, on consumer CRT's at least. Not certain about arcade chassis.
KaYs3r:
Thanks for tip buttersoft,
I'll try to find the pump-up capacitor, it has to be one of the film capacitors because I've changed all of the electrolic.
Do you think I should swap the vertical IC too?
Thanks 👍