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So today I decided to clean the inside of the lower Playfield window. Like a dumbass I disconnected the connectors on the lower playfield with the game on. Something must have touched and now the cannon is in like a search mode all the time and some of the lighting is not working correctly. Any thoughts? Thanks
I did check the fuses and they all seem to be okay. I have a coin taker backbox lighting kit in it and I also have the total Rock concert mod in it. Both only seem to be working partially
The back box kit is not flashing and attract mode nor is the total Rock concert mod
Canon switches are not registering. The cannon doesn't know where it is during gameplay or test mode. Some of the flashers are working on the back box kit. Some of the Flasher seem to be working on the total Rock concert mod. Both mods seem to be tied into the games flashers . Is it possible that I blew a transistor near j6. Because when I pull the j6 connector off of the board the Canon stops working and the flashers stop working. So it seems like all of my problems seem to be coming from that location
Something appeared to have touched and shorted. I am 99% sure. Because when I unplugged something from the mini Playfield it fell and touched something in the Canon started to move. I was just doing a switch test and the opto and cannon mechanical switches do not appear to be working
Ok...So here's where I stand. I friend suggested that I may have shorted a chip for switch matrix on mpu. I checked for all dead switches. I found these are dead:
Right ramp switch
Right orbit switch
No mini playfield switches work at all
Cannon opto and mechanical both don't work
Cannon fire switch not working
Quoted from TimeBandit:Well I'm pretty sure you're getting a strobing signal from there. The switch drive pulses between 0-4ish volts, so on average you get a percentage of that. On a scope it looks like this..
In this range though, the difference between 2.65V and 3.1V(which is what I get on a working machine) is significant, so there could be a chip problem, but you would need a scope to be sure. The difference may be in our meters.
Interesting. A few people have said that it may be a chip problem. But what does that exactly mean?
Quoted from arakissun:I'm not STERN expert,but know well Williams/Bally/DE/SEGA.
After little investigation from the manual you have Q4 at J1(Switch Columns) for the switch matrix which is 2N3904 and after that go to U1(74LV273).
2N3904 can be test easy-with DMM
Connect the multimeter’s positive probe to the transistor’s base lead(middle leg). Connect the negative probe to the transistor’s one time at to left leg after that to right leg.
After this connect red probe to left black to right.
And after that red probe to the right leg and red to the left leg.
You must not have values under .4 or full short .0
If you have under .4 your transistor is bad and you are lucky.It's cheap and easy for replace.
To be sure on 100% you can compare the values with the other transistors in switch columns-from Q1 to Q8.They are same and muse have same values
If not then may be U1 is bad.
Also trace the connections from J1(5 pin) to U1(9 pin).And from J1(5 pin) to the and of the wire whatever it end under playfield.May be to have broken wire somehow.
This can be do again with DMM.Get both probes no matter which one ant touch them on each of the begin/and trace.If you have connection you must hear "beep" or .001 or .002 lie values.
Do this on shut off machine.
Thank you for this but I'm lost. I'm best with th mechanical aspect of machines.
Quoted from elcolonel:Way more simple than either the op or most others are suggesting! Op seems to be more impatient than me(Did not think that was possible, but apparently is), slow down and closely inspect the area where you were working and you will find the problem. You very well might have done additional stuff after the fact, because you started panicking right out of the gate and when you have a sky is falling mentality, more bungles follow.
I wish it was that easy! I have inspected, inspected and reinspected. I can't find anything
Quoted from heme:did you do a continuity check btwn the backbox on the J1 green/ yellow wire and the various switches they are connected to?
Just looking over the basics again.
if it's not Q4 then eshhhh. that probably means surface mounting repairs or a new board.
I have continuity there.
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