Williams PIN·BOT (Williams, 1986) G.I. deja vu.... now Pinbot G.I. problem

[new_pinhead]

G.I. lights on left side of playfield are not getting power. from bottom left side to top left side lamps on playfield. checked for broken wire or broken ground wires - nothing. looked at power board, and schematics and i'm looking at 3J7 - labeled 'g.i. power in' on board. schematics call for 5.8 vac coming in from each of the 2 yellow and 2 yellow/white wires which come from the transformer. my meter shows only 2.4 vac on the y/w wires and 1.2 vac on the yellow wires. all other g.i. lamps work on playfield and backbox. any help would be great, i've put a lot of time and money into reviving this machine. i'd really like to get everything working.

 

[pinballdaveh]

what is the manufacturer and machine title of your machine?

 

[new_pinhead]

1986 Williams 'Pinbot'.

 

[new_pinhead]

was wondering if anyone could help me with the problem i'm having with my Williams 1986 'PINBOT'. Williams system 11. new rottendog MPU just installed, all the rest is original. The G.I. lamps along the left side of playfield are not getting power. i can't figure it out. could anyone offer any help, i would really appreciate it.

 

[pinballdaveh]

have you tried jumpering the working gi side to the other to see if it comes on? when trying this make sure jumpers go to same wire colors. do 1 jumper at a time , you might find the non working line.

 

[new_pinhead]

thanks, i'll try that.