Hi All, this is the last of the issues I have found on my new machine. Would really appreciate some input on nxt troubleshooting step.
Backbox GI lamps connected to green and yellow wires aren't working (lamps connected to purple works).
Lower playfield lights (such as inlanes etc.) connected to the yellow wires aren't working.
I have followed the excellent pinwiki guide here: http://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Introduction
What I have done so far:
J120 pin 3 to Triac Q14 tab - OK
J120 pin 9 to J115 pin 6 - OK
J115 pin 11 to Triac Q14 pin 1 - OK
J115 pin 6 to J120 pin 9 - OK
J121 pin 3 to J120 pin 3 - OK
J121 pin 9 to J120 pin 9 - OK
Lower board GI Lamp sockets
Lamp socket to J120 pin 9 - OK
Lamp socket to J120 pin 3 - OK
J120 cable connector pin 3 and J120 cable connector pin 9 (yellow) - 0v
J120 cable connector pin 2 and J120 cable connector pin 8 (orange) - 6-7v
J120 cable connector pin 1 and J120 cable connector pin 7 (brown) - 6-7v
J121 cable connector pin 6 and J121 cable connector pin 11 (purple) - 6-7v
J121 cable connector pin 5 and J121 cable connector pin 10 (green) - 2.3v Huh?!
J121 cable connector pin 3 and J121 cable connector pin 9 (yellow) - 0v
J115 cable connector pin 3 and J115 cable connector pin 11 - 6-7v
I have also tested related fuses, F108, 107, 106, 109, 110. All good. I'm slightly puzzled why I get half the voltage on the green wires?!
While doing the troubleshooting I also found the J115 pin 10, 11 and 12 are slightly melted (black) so I need to order and replace the 12 pin connector, cable and board. But, going through the test it does look like these are still working and connect to the correct places.
J115 seems to have all the right voltages and I do have connectivity between J115 pin 6 through the F108 fuse to J120 pin 9 as well as from J115 pin 11 through the Q14 Triac and then down to J120 pin 3. hmmm. I guess a possibility is that the Q14 Triac is broken? Is there a way to test this?
Any input/guidance is appreciated! =)