Toobin PCB sending no Blue?

smpoponi

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Just got my chasis back from chad @ arcadecup and got it back in the machine, fires up well and pic is looking right except there is no blue. I crank the blue cutoff and drive and I can see blue on the whole screen but not in the test pattern specifically so that makes me think the game PCB is not sending blue to the monitor.

I checked the pcb to monitor chasis for continuity and its fine so I guess its a component on the game board?

Still totally playable but would love for it to be tip top.

What do ya think?
 
I think you should swap red and blue inputs to the monitor from the board to see if the problem follows the blue wire from the game board or if it really is a problem on the monitor.
 
I swapped red a blue and I get full blue (red pcb sending to monitors blue) but no red (blue pcb feeding monitors red).

That would suggest I am not getting blue from the PCB right?
 
Check page 34/48
http://pdf.textfiles.com/manuals/AR...t Printing) [Schematic Package] [English].pdf

There are 3 SIP resistor packs on the outputs you need to check for physical damage... same with the transistors driving the outputs.

If there is no physical damage then you start checking components on the outputs.

If the SIP resistor packs are damaged physically, give me the part # off of them as I may have one from a parts board.
 
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