Hantarex Polo 25" does not power on

basscadet

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Hello,
I recently found an abandoned arcade cabinet and took it home to throw away its insides and install an old PC with ultimarc usb controller + joysticks & buttons I already had in an older setup. As I looked around I found out that it sports a Hantarex Polo 25 board on a tv tube I measured to be 28" (that's including the black stripe around screen). I read a bit about it and it looks like a great opportunity to use this one instead of a crappy old 19" AppleVision I had set up all along. It was left there for maybe hours so it wasn't rained on and is in top shape, clean with some minor wear.

see some photos here
http://img260.imageshack.us/gal.php?g=board2.jpg

Thing is, can I somehow connect this Hantarex monitor to a PC monitor output? There's a J106 connector (second from left)with 6 cables coming out (R, G, B, Ground, H sync, V sync) going to some connectors I suspect connected to the game circuit board (that board was missing).

also, where should that ground cable between the power jack and video jack connect to? It's hanging in mid air as you can see and I'm wondering whether I should attach it somewhere (unless it goes on the metal frame I saw in some Hantarex brochure photos).

I reconnected the cut power cable and found out why they dumped it. It's not working. The screen pops like all screens do at start up, there's a faint flash at the 4 corners for a split second... and then nothing. There's a faint glow at the back of the tube though (don't know if it's supposed to be brighter or if it's normal). I tried changing the TEST VIDEO jumper next to the Video Jack to ON in case it powers up the monitor showing some test pattern / lines /whatever but it still doesn't power up properly.

Could it be waiting for video signal and not powering up until it receives one? Any tips appreciated, thanks.
 
It is most likely looking for a video signal. It is powered up, as displayed by the flash and neck glow. These monitors don't show a 'search' indication like a PC monitor. There are adaptors available for connecting a pc to an arcade monitor. Just do a quick eBay search.

The ground wire may not be connected because the previous owner grounded it some other way. You can connect it to the common cabinet ground if no other ground path is observed.
 
Hello,
I recently found an abandoned arcade cabinet and took it home to throw away its insides and install an old PC with ultimarc usb controller + joysticks & buttons I already had in an older setup. As I looked around I found out that it sports a Hantarex Polo 25 board on a tv tube I measured to be 28" (that's including the black stripe around screen). I read a bit about it and it looks like a great opportunity to use this one instead of a crappy old 19" AppleVision I had set up all along. It was left there for maybe hours so it wasn't rained on and is in top shape, clean with some minor wear.

see some photos here
http://img260.imageshack.us/gal.php?g=board2.jpg

Thing is, can I somehow connect this Hantarex monitor to a PC monitor output? There's a J106 connector (second from left)with 6 cables coming out (R, G, B, Ground, H sync, V sync) going to some connectors I suspect connected to the game circuit board (that board was missing).

also, where should that ground cable between the power jack and video jack connect to? It's hanging in mid air as you can see and I'm wondering whether I should attach it somewhere (unless it goes on the metal frame I saw in some Hantarex brochure photos).

I reconnected the cut power cable and found out why they dumped it. It's not working. The screen pops like all screens do at start up, there's a faint flash at the 4 corners for a split second... and then nothing. There's a faint glow at the back of the tube though (don't know if it's supposed to be brighter or if it's normal). I tried changing the TEST VIDEO jumper next to the Video Jack to ON in case it powers up the monitor showing some test pattern / lines /whatever but it still doesn't power up properly.

Could it be waiting for video signal and not powering up until it receives one? Any tips appreciated, thanks.

I can tell you the following:

yes, it's waiting for a video signal.

and if you have powerup static crackling and neck glow, the beast works.

these are notorious for the high output transistor going out on them. yours is healthy, cause it's getting power. :) I have a Polo 25 that's been serviced twice already and it still continues to blow the HOT for some highly amusing reason.

here's a link to the manual if you're in need of tips on how to adjust it http://arcarc.xmission.com/PDF_Monitors/Hantarex Polo.pdf
 
Thanks for the manual link, I did what I read in an other forum and raised the value of the Flyback's SCREEN trimmer pot and it lights up fine! All I can see are scan lines of course however I can move on to the next step and get me one VGA to Arcade cable from Ultimarc ( http://www.ultimarc.com/JShopServer/section.php?xSec=2 - fourth from top). Couldn't find any other on ebay, only one was selling the above same cable ( http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=350023202879 )

Is there a simple/fast way to hack a cable and try it now? Could the video signal come from a dvd player scart out cable that splits to 3 rgb RCAs? I can see the 3 RGB cables on the monitor video jack but there's also one ground, one Horiz. and one Vert. Sync cables that would be left out...

One more thing, are the Flyback and HOT the one and same part?
 
Thanks for the manual link, I did what I read in an other forum and raised the value of the Flyback's SCREEN trimmer pot and it lights up fine! All I can see are scan lines of course however I can move on to the next step and get me one VGA to Arcade cable from Ultimarc ( http://www.ultimarc.com/JShopServer/section.php?xSec=2 - fourth from top). Couldn't find any other on ebay, only one was selling the above same cable ( http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=350023202879 )

Is there a simple/fast way to hack a cable and try it now? Could the video signal come from a dvd player scart out cable that splits to 3 rgb RCAs? I can see the 3 RGB cables on the monitor video jack but there's also one ground, one Horiz. and one Vert. Sync cables that would be left out...

One more thing, are the Flyback and HOT the one and same part?

the black box looking component where you turned the Screen up is the flyback. that's what provides the high voltage to the tube. :)

the HOT is a transistor mounted to the large heatsink on the right side of the chassis board (when looking behind)

by "scanlines" you're not talking about orange lines are you? if you, then you have the Screen turned up too much. wait until you get a picture signal to it before you adjust those.

I don't know anything about the signal converter you refer to. :(
 
The scan lines were light grey on white background and I switched it off soon as I have no idea whether that high value might harm the monitor. Thanks for clearing up the Flyback & HOT mess.
 
ok, so I got the arcade to VGA cable, connected it to the jack my polo has and... here are the results:

This is while it's out in the BIOS screen (woooo! the matrix!)
img0036he.jpg


This is while inside Win 98
img0042ib.jpg


tried all the knobs on the monitor chassis but they seem to regulate colour, contrast, lightness, sharpness, size etc. Nothing can be done to stop this mad scanline scrolling and get something legible on the screen. Should I have some special settings inside windows? Some screen driver or colour / Hz values in Win 98 display settings? The previous installation was using only the Hsync cable, so I tried taking out the Vsync for a moment but there was no change on the screen. Could it be that both V & H sync were soldered to one common cable somewhere on the JAMMA connectors and that one cable ended on the monitor's Hsync jack?
 
wow... thanks!!!

I'll try that Soft15 and see how it goes.

Edit: After some tries it worked! Win 98 desktop is clearly visible, colors are fine, screen works! I'm now transferring all the necessary files for MAME to see how the actual games look like. Is there some specific resolution I should use?
 
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