fish tales woes

original issue was no power up (which I found to be caused by the main harness from the transformer heating up and melting together shorting every wire in the harness as well as damaging the transformer and PDB (I believe part of this was caused by the 10 amp fuse I found in the main fuse block when I started troubleshooting as well as the large number of upgrades the customer had added including replacing the DMD with an LCD upgrade)). PDB was sent to anther company for repairs including new pin headers for J102 and J103, and replacing C2,C4, and C5 however once the customer received it back he just plugged it back into the machine the shorted harness caused more problems. which is when I was called.

I have repaired the PCB traces that were burnt out.

I have done a wire for wire replacement for the entire harness from the transformer to the PCBs

I have replaced the trash transformer

I also replaced BR2 as most of the traces under it were burnt out and I didn't want to have to worry about it after repairing the traces.

I also replaced a blown C11 as well as Q1 and R260 all were visibly blown figured Id change out C6 and C7 while I was swapping C11 as well.

the main fuse blows the moment I plug in J102 to the PDB. I haven not checked the other plugs yet as I have a fixed amount of 8 amp fuses right now.

the thermistor in line with the EMF and the main fuse looks ok. (I only mention this as when I search for this issue, this comes up as an issue in a few threads)

I'm honestly at a lost now as to why I'm still blowing the main fuse and why it would do this with just J102 plugged in. the obvious reason would be a short on the PDB, but I can not find any signs of one.

any ideas where I should start looking next would be greatly appreciated.

Nah it clearly labeled 110v (well 115v but obviously not 220) and he just had it plugged into a normal 110 outlet in the house.

Glad I bought extra. I'll look at the others

Agreed it shouldn't have happened but it did have a 10 amp in the main when I got it and it's supposed to be an 8 so now I have melted parts. All the fuses were checked when I found the wrong one in the main and it was the only one that was wrong it wasn't the only blown fuse though. I did a wire by wire swap to make sure I didn't cross anything when I built the new harness, so I'm confident that isn't an issue.

as suggested i checked the other bridges and BR4 was bad and has been replaced. unfortunately that did not stop it from blowing the main. I hadn't thought about pulling the fuses on the board but Ill give it a try and see what happens.

I don't have the fliptronics board plugged in yet but I'll check the bridge on it to make sure it doesn't cause a problem down the road.

ok I lied i did have J901 on the fliptronics board plugged in. unplugged it and it did stop blowing the main. so as suggested I checked BR1 but its testing good. Im down to my last 3 8 amp fuses now, so I cant check all the other plugs one by one.

Not sure what I did but I'm back to blowing the main 8amp with just j103 and j102 plugged in on pdb. I pulled f111 thru f114 with the same results.

J103 was ran to the blue/white from the transformer when I got it and I wired it back up the same way when I built the new harness.

As requested I unplugged j103 and just have j102 plugged In with all 4 fuses removed and it is still blowing the main 8amp.

after you said J103 shouldn't have anything connected to it I went back the the schematic and that turned out to be the problem. I'm at fault here I should have checked it against the diagram instead of assuming it was right when I got it. It does explain how he burnt out the ground pins on the PDB though. I double checked all the wires from the transformer against the schematics after that and the rest are ok. I just powered it up with all power, and then power and playfield plugged in, and I'm finally booting up into the game. only thing left is to wire the LCD upgrade correctly and I should be right as rain.

Thanks again for the help and again My apologies for not checking the specs first and wasting everyones time.