Hantarex Polo 25 No Blue Colour ?

[EnlightX]

Hi guys just come across this site and thought u might be able to help

Iv just got an arcade machine (Used of Ebay)

im gonna MAME it only problem is there seems to be no blue at all

weres theres white theres just Yellow ect

this is from the orignal Jamma Game and also when i set the video Test jumper on the monitor itself

Iv tried altering the blue knob on the back and it seems to do nothing at all red and green do.

Iv been readin about cap kits ect would this fix it ?

If so were can i get 1 in the UK with diagrams

Or is it jsut the case of the monitor gun is dead and i just need to get a new monitor?

[EnlightX]

No 1 has never had this  ?

Its goda be a common thing a colour goin on a monitor ??


PLEASE PLEASE PLEASE HEELLPPP MEE

[PacManFan]

I know this may be obvious, but check your video connections , and make sure the blue wire is correctly connected, Use a multimeter to trace back to the jamma harness.

If it's not that, there may be damage to the connector on the monitor. re-flowing the solder around the connector may help. I've had to do that with a wells garner 4600 before.

-PMF

[MonitorGuru]

Determine if its the game board or monitor.

Turn up the SCREEN control (on the flyback transformer on the monitor under the Focus dial) and see if you get a white screen. If so, the monitor is perfectly fine, it's your game board that is defective or wiring between the gameboard and monitor. Adjust the blue gun DRIVE and CUTOFF controls and see if it makes any difference.

If it's your monitor it could be a number of items... Bad connector, bad transistor or IC in the circuit, disconnected cable between chassis and neck board, bad potentiometer controlling the blue gun, bad socket to the tube, broken pin on the tube, or dead gun in the tube, or broken solder joints on the monitor chassis.

[StephenH]

Try swapping the Red (or Green) wire for blue in your wiring temporaly, and see if you get any blue.  If you now get blue, your wiring is bad.  If not, the problem is probably in the monitor.

[EnlightX]

YAY replies

like i said in the 1st post iv set the video test jumper to on and the test signal is yellow also iv tried the video test in arcade os theblue test is just back

Iv tried blue pot on back and nothing happens at all

i took the flyback off and cleaned and checked wires ect everything seems okay

only 1 thing seems stange on the back of the monitor were u take of the flyback there the male socket for the flyback

there looks as if 1 pin is missin ?

has any 1 got one of these monitors too see if its correct ?

tommrow i think im gonna try soldering the red pot of and stickin it on the blue and see if that has any effect

thanks again for the suggestions any more will be great