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hantarex 28 polo star tri sync

Posted: May 23rd, 2016, 4:41 pm
by ahze
hi all
i recently buy my first cab
with an hantarex 28 polo star tri sync
i buy it with the naomi system
all going fine in 31khz with naomi and dreamcast
nice color ,nice geometry nice contrast and lumisoty

but,
when i put my mvs slot or cps2 system (15khz)
i have vertical waves on both sides,to stop this waves i have to turn down contrast and lumisoty but is totaly unplayable ..the screen is black or waves ..
i tried to play with G2 but i can t find a good compromise i think the problem is the auto switch give so mutch hight voltage to 15 khz
this is a screen from my problem
ondul.jpg
sorry for my bad english
and thx to all leeing me :)

Re: hantarex 28 polo star tri sync

Posted: May 23rd, 2016, 5:12 pm
by Andypc
I have a similar issue with my 25" polo star, but in 31khz. Would be interested to know the solution. I Was wondering if it needs a video amp and turn down the screen volts?

Re: hantarex 28 polo star tri sync

Posted: May 23rd, 2016, 5:30 pm
by ahze
someone tell me ,is too hight voltage ..but no more maybe the auto swtich don t do is job correctly
i ll try to find some similar issue on the web but nothing

Re: hantarex 28 polo star tri sync

Posted: May 23rd, 2016, 11:45 pm
by Andypc
Screen volts to high on Lopt?

Re: hantarex 28 polo star tri sync

Posted: May 24th, 2016, 12:18 am
by grantspain
could be one of the 100uf 250v caps in the power supply secondary

Re: hantarex 28 polo star tri sync

Posted: May 24th, 2016, 2:14 am
by ahze
I LL try to put one eye on this ,someone else tell me to see on east west board ... But nothing sûre

Re: hantarex 28 polo star tri sync

Posted: May 24th, 2016, 11:24 pm
by ahze
thx grantspain , are you speaking to the capacitor c109 ?

Re: hantarex 28 polo star tri sync

Posted: May 25th, 2016, 9:17 am
by grantspain
well not really but i would check that cap as well,if it were my chassis i would check caps c1,c11,c19

Re: hantarex 28 polo star tri sync

Posted: May 25th, 2016, 12:29 pm
by ahze
OK thx i chech this

Re: hantarex 28 polo star tri sync

Posted: May 27th, 2016, 5:02 pm
by ahze
hello
i have change all capacitor u tell me and nothing changed