Hantarex Polo

Vis3c

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Hi guys

i have trouble with my Hantarex Polo.
its a long story, i had problems with my monitor, so i wanted to switch to a New VGA Monitor. You guys told me that i should keep the old CRT monitor so i did...

now i got myself a new Hantarex Polo chassis, because the old Hantarex 9300 died on me.
now i habe a problem called the Vertical Screen Collapse.
someone knows what causes the problem with my chassis?

i also read on this site: http://wiki.arcadeotaku.com/w/Hantarex_Polo_1
that part TP31 can cause the issue, best you read it yourself on the website above.

someone knows more / knows where these parts are located? i didnt saw it on the shematics and i dont thon i could find them by myself :)

thanks alot
 
Hi guys

i have trouble with my Hantarex Polo.
its a long story, i had problems with my monitor, so i wanted to switch to a New VGA Monitor. You guys told me that i should keep the old CRT monitor so i did...

now i got myself a new Hantarex Polo chassis, because the old Hantarex 9300 died on me.
now i habe a problem called the Vertical Screen Collapse.
someone knows what causes the problem with my chassis?

i also read on this site: http://wiki.arcadeotaku.com/w/Hantarex_Polo_1
that part TP31 can cause the issue, best you read it yourself on the website above.

someone knows more / knows where these parts are located? i didnt saw it on the shematics and i dont thon i could find them by myself :)

thanks alot

TP31 (Test Point 31) its not a component. you need to measure your voltage there.

Mecha should chime in on this since he is the polo master...
 
fairly certain you measure the presence of voltage for the vertical IC at TP31. I'm not really the master of Polos, M K L is :) I work on so much different stuff it's virtually impossible for me to master any one thing.

here's what I do know though. I worked on Polos at Arcadecup and using a FLIR gun on the handful of chassis I worked on I found that one of the vertical section resistors runs extremely hot. which is R167, it's on the bottom edge of the chassis slightly to the right of the middle. this is probably the most common failure to cause vertical collapse. there's another resistor that's near the vertical IC itself, that's R177, that one can fail as well. when these resistors go open you'll lose the 25VDC supply to the vertical IC and you will thus lose vertical deflection.

the last most obvious failure would be the vertical IC itself. you won't know this unless the resistors I mentioned are good.

there's also some capacitors that can cause this, so it's encouraged that you cap the chassis if the caps look old.

beyond that, if you have high voltage then you're about 3/4 of the way there cause that's the biggest problem with these. :p
 
today i noticed that my power supply jumps from 2 volts to 5 to 7 and so on... can the power supply cause that issue? or is it the wireing itself?
 
You hate it now...but you will learn to like it once you fix it. If you have vertical collapse, it could be a few things. First, start with a cap kit if you haven't recapped yet. I had vertical collapse on two diff chassis. One because of my mistake in putting a cap backwards...and the second because of a resistor. Check this forum for tips, but also first follow Randy fromm's flowchart
 
a friend of mine recapped it, he is in his hollidays at the moment, he is in australia for 5 months... lucky one :)
how do i see if a cap is in backwarts?
 
a friend of mine recapped it, he is in his hollidays at the moment, he is in australia for 5 months... lucky one :)
how do i see if a cap is in backwarts?
Follow the flowchart to see what specific caps could cause vertical collapse. Then lookup hantarex polo cap map to see the orientation. Or you can look on the parts side of the chassis to see if the negatives line up with the silkscreen part locations
 
I made a cap map years ago and posted it here. not sure if the attachment still exists but your search will probably turn up mine and it's got some inaccuracies that I'll need to redo someday.

everything I mentioned is straight from the flowchart; the most common causes of vertical collapse. there's other items including the exact caps.
 
i just wrote my friend a message to australia.. man that will be expensive on the bill end month xD
the dtrange thing was, that the chassis worked without problems at his machine, he mentioned, that it could be faulty wireing?
(also, if i turn the machine on without any game on the jamma harness, there is still a line on the monitor, is that correct that way? i just dont know, newer had that problem...)
 
the deflection board cracks very easily. for all you know it could be a blown trace.

I maintain that the resistors are open. just test them.
 
what should they read? how do i test them exactly? one leg should be shorter isnt it?
i never done this, i collect for 3 years now and the only problem i had so far was a cable wasnt right indide a socket xD

pls help :D

(@Mattspad should be, never changed someting there nad it worked like a champ like 3 months ago... one day to an other my hatnates MTC 9300 didnt work, the monitor didnt turn on at all anymore, but there was sound. so i sended it to my friend. he sended me a polo back. now the monitor turns on, but draws a vertical line on the screen.) maybe a dump question, but how can i check if it is correct?
 
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