Pole Position monitor help, Matsushita tube

[Clu]

Hello all,

I'm trying to get my Pole Position ready to sell and was wondering if anyone worked on the monitor before.  The chassis # is nmx-l21g, model # is tm-202g, and the tube is a Matsushita.  I have read that the Matsushita tube might be the problem.

The monitor doesn't have any green.  Its a bit wierd because the lap counter is green, but nothing else.  It also seems to replace most yellow with red.  (lines on side of track and start sign)

I recapped the chassis and reflowed the solder at all the connectors, but no luck.  I swapped the blue and green wires going to the neckboard, but still could not get any green.  I also tried the board in my other PP and it worked fine. 

Thanks for reading.  Any ideas?

[Kevin Mullins]

What color adjustments have you tried to make ?

(turn red down, turn green up, etc)

[Clu]

I have the red and blue cut-off pots turned up all the way.  Adjusting the green cut-off pot has no effect on the picture.  Unfortunately, there is no green drive pot, only red and blue, and adjusting those has no effect on the green.

Adjusting the pots on the little input board has no effect on the green either.