25" Polo cap job

treborlicec

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Is the polo like the 7000 where you should go ahead and replace the flyback at the same time as a cap kit? The monitor has a real crisp clear pic. Just has some foldover at the bottom that I want to elimate w/ a cap kit.

Thanks,
Robert
 
Monitor guru's? Want to place an order with Mr. Roberts today. Need to know if I should go ahead and get the flyback. Thanks as usual.
 
foldover at the bottom?

are you sure it's not the horizontal linearity out of whack?
 
Well if we're talking about the stretch, then no. None of the adjustments fix it. Basically, the bottom 1 inch or so has a squished image. Totally ledgible, but shorter than it should be. Am I making sense?

Thanks,
Robert
 
yes, that would be horizontal linearity. :)

no need to do a cap job, as there's an adjustment pot on the Polo to fix this. I've had 2 Polo monitors with the same problem you speak of, and I was able to fix them both without replacing the caps.

I forget the location number on it, or if it even is marked "H Lin" or something like that, but if you look at the chassis from the very back, and look in the middle, the very first adjustment pot that you see is what controls Horizontal Linearity. if you're unsure, you can search on here for a thread about a Lethal Enforcers where the picture was huge on the bottom and squished badly at the top.

please note that this particular pot will require like a small screwdriver to adjust, there's no knob. be extra careful though.
 
Sweet. I'll check when I get home. Been bugging me and had wanted to cap that thing forever. Glad I asked first. Thanks.

Robert
 
Okay, there are no pots on the chassis. There are the usuals on the neckboard. I saw what looked like a horizonal width coil (copper wound w/ a slotted screw adjustment). That did not do anything when turned all the way clockwise and counter clockwise. Here are 2 pix.

http://webpages.charter.net/pinballarcade/Jam TE/

I didn't take a pic of it but the purple score bar at the bottom is much shorter than it should be based on screen shots on the web.

Also, you can see that there is some black space at the bottom. I can't make the pic go any lower w/ the adjustment all the way down.

See how the text gets smaller the farther down the screen it goes. Shouldn't a cap kit fix this?

Thanks,
Robert
 
I am so stupid. talking about "horizontal" things so much lately.

it's VERTICAL linearity. I'm on vacation right now, far far away from my machines, but...

polo.jpg


see the bottom blue pot? that's the Vertical Linearity one :) the one right next to the flyback

I hope you didn't mess with the width coil....

now that I think about it, you might be able to pop one of the green knobs off your remote board and use that to adjust. you won't have to turn it too much. I think you turn it clockwise to increase the height on the bottom portion of the monitor. make sure you have a convergence grid for a reference.... it'll make it monumentally easier. the Crosshatch Pattern in the NBA Jam TE test mode is excellent for this.
 
Thanks. I'll check that tomorrow. Too late now. The Horizontal Width coil adjustments didn't make a difference at all. I was expecting it to, even if not the correct adjustment, but nothing changed. I put the adjustment back to where it was before I turned it. Of course, I didn't try to make the horizontal image any bigger after my adjustment, so I probably wouldn't have seen a difference unless I tried that. Duh, I'm up too late. Will report back tomorrow evening. Thanks, Mecha
 
awesome. yeah. how's your remote board harness? the one on my KI monitor had some intermittent BS where it would tweak out on the vertical height and such. I just plugged the board directly into the chassis to fix it. probably have cold solder on the chassis. it works fine though, and when it comes to Polos, if they work, don't F with them. :)
 
Great info...any further?

Hi all...noob here. Been collecting arcade games for about 6 months, and am absolutely obsessed.
I found this post, and it actually is one of the problems I've been struggling with. I've got a Polo 25" in my UMK3 cab, and the bottom is so squished I have to stretch the entire screen out to compensate. So, in MK, the characters look ridiculous as they have legs that appear to be about one quarter the length they need to be. Aside from the humorous aspect, I also have no health/damage meters at the top, as it's so stretched to make up for the bottom. Anyway, I found the vertical linearity pot, and adjusting that DID help some...but it's still pretty bad. Am I to assume that this monitor may need some new caps?
Thanks in advance, and sorry for not posting my own thread. :)
 
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Hi all...noob here. Been collecting arcade games for about 6 months, and am absolutely obsessed.
I found this post, and it actually is one of the problems I've been struggling with. I've got a Polo 25" in my UMK3 cab, and the bottom is so squished I have to stretch the entire screen out to compensate. So, in MK, the characters look ridiculous as they have legs that appear to be about one quarter the length they need to be. Aside from the humorous aspect, I also have no health/damage meters at the top, as it's so stretched to make up for the bottom. Anyway, I found the vertical linearity pot, and adjusting that DID help some...but it's still pretty bad. Am I to assume that this monitor may need some new caps?
Thanks in advance, and sorry for not posting my own thread. :)

Hi and welcome. No need for caps. Do the adjustment discussed on page 1 of this thread. Using the lower blue adjustment pot in the pic posted by Mecha. That fixed mine.

Robert
 
Thanks for the welcome! I did find the Vert Linearity pot. I adjusted it.
It DID help....a little.
But the bottom of the screen is still squished, and I have to stretch out the whole screen to compensate.
Any other steps I can take when the pot has already been turned as far as it will go and still leaves the bottom squished?
 
you only have to turn it veeeery subtly. with the power off I'd rock the pot back and forth between extremes (called "wiping"), turn it back on and then give it another whirl. I saw a monitor on here last year where it was squished possibly worse than what you're describing, except it was like the top 1/3 of the screen was non-existent and the bottom 1/3 was like 2/3 size :p and they were able to sort theirs out.

if that doesn't fix it, then you're probably looking at a cap kit. :/ these boards are like the spawn of satan to work on, it's almost as if looking at it the wrong way will break them. lol

guys on KLOV hate these monitors, so it's up to people like me that know nothing to lend advice. :(
 
you only have to turn it veeeery subtly. with the power off I'd rock the pot back and forth between extremes (called "wiping"), turn it back on and then give it another whirl. I saw a monitor on here last year where it was squished possibly worse than what you're describing, except it was like the top 1/3 of the screen was non-existent and the bottom 1/3 was like 2/3 size :p and they were able to sort theirs out.

if that doesn't fix it, then you're probably looking at a cap kit. :/ these boards are like the spawn of satan to work on, it's almost as if looking at it the wrong way will break them. lol

guys on KLOV hate these monitors, so it's up to people like me that know nothing to lend advice. :(

Awesome, thanks for the info!
I'll have to give that a try. I'll let you know if it works!
...'spawn of satan', lol.
 
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