First issue has to do with the two center rollovers in the hoop. When pushed they light up the following letters on the cabinet in Silverball- ERBA. Plus nothing registers when the ball rolls over them. In switch test mode 02 flashes.

Next issues is the B target when pushed makes the arrow under the Center target or N target light flash rapidly along with the left 1000 when lit above the E target. The B will not register when hit.

The A on the right far out lane makes the I, N and 1000 when lit above the A right target flash rapidly. The A will not register when rolled over.

I have check all the switches and diodes all seem fine. All the boards in this game are about a year old from Alltech Systems from what I was told when I got it. Been working great until recently. This is been a bit of a head scratcher.

Now looking for shorted wires or bad connections on the boards.

Thanks in advance for any help guys.

Frankie

No work other than replacing some blown bulbs. Here are some pictures of all the boards.

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Also yes there are caps on them.

Ground braid is attached I checked that earlier. Yeah the ERBA lights in the backbox in Silverball. I feel like when the roll overs are pushed down the power from the rollover switch is back feeding to those 4 lights. I have checked everything that I can think of.

I know how to solder and read schematics. I will try to tackle anything but this is a bit out of my norm. I have 8 pins and only 2 are giving problems. Silverball and Addams Family. Right now I am focusing on SM.

I will check but pretty sure it’s not. I have checked all the connectors don’t think I’m off one pin. I will be home from work around 11 am so I will look at then.

Checked the J1 connector and it is right. Addressing the issue of black taped wires. Soldering then and heat shrinking them.

I cut one cap leg on each rollover. Good news is the lights on back board don’t come on but roll overs still don’t work. I also cut one cap leg on the B target and A rollover so now the lights don’t flash on them either.

Making progress but rollovers and B target still not registering.

Ok so I have gotten the wires that were twisted together with tape on them soldered with heat shrink on them now.

Check continuity from rollover switches up to A4 board all is good there. Switches check out good. They are gapped right at 1/16”. Caps are cut so lights aren’t flashing as stated about. Switches still don’t respond. Trying to figure out my next move.

Thinking now I may have an issue on the A4 board. Going to pull it out and look it over. Will post any findings in a bit.

I forgot I had another Alltek board in six million dollar man. Swapped boards and has same issues. So it’s not the board. Seems it’s something else. I don’t know if I am relieved or more aggravated now.

Also found these 2 wires taped together under the playfield yellow/red and white/orange.

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Well so far I have fixed the twisted together wires that had black tape on them. I cut one leg on each cap to the four switches so random bulbs would quit flashing rapidly when one of those four switches were activated. It appears that someone had a field day soldering on this machines playfield.

One thing that I just thought of was to double check those wires that I soldered to make sure that they are going to the correct position on the board. I would think that if a couple are switched up it could make weird things happen. All of the wires on J3 were cut and a different connector was spliced in. I am starting to wonder if a couple wires could be mixed up.

Current situation is as follows:

Left "B" target does not work
Right out lane "A" rollover switch does not work
Both center rollovers in the hoop do not work

Everything other that those four switches work fine.

Actually come to think of it I should go ahead and check the wires on J1 and J4 on MPU as it looks like the connectors are new. Maybe its just a couple crossed up wires. Could I get that lucky?

I can do that when I get off work. I should be home around 4 and will let you know.

I can tell you that when I go into switch test mode right now it flashes 02 which is the 2 center rollovers. All the other switches work except for 02, 18 and 26 but only 02 flashes in test mode.

Ok will do. I was looking over the switch matrix and I think the a couple of the coin chutes have been disconnected. I will do the sequence as you have said and will report back around 5 this evening.

Ok I will check them out. Thank you very much. Once I get this one working the real fun begins. I saved the hardest for last The Addams Family. Going to be some real fun.

Ok so here is what I have been able to find out so far. If I unplug the J2 connector the 02 fault goes away. So this means the fault is on the playfield or from the J2 connector down to the playfield.

I mean it could be a pinched wire or a wire that isn’t soldered in the right spot.

Yeah they should only flow one way. I checked everyone on the playfield. They all checkout good. I am a bit stumped now. I have looked at everything on the playfield. Heck I even pulled it out and laid it on my pool table to get a better look.

Ok so I have tracing all the wires to make sure they are right on the connectors that have been replaced. In the picture this J4 if you look at pin 7 in the schematic it is supposed to be 25 or blue/white but this one is black/white. Is this a big deal?

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I hooked up the diodes like they are suppose to be after I checked them. Yeah looked at those too. Every diode tests good forward voltage they read .560 and the reverse voltage read OL. What is weird is the #34 switches work just fine and they are on I1. I pretty much fried my brain yesterday evening. I worked on it from about 4-10pm.

Nothing happens. 02 will still flash in test mode.

Ok I will check that this evening and just go down the chain. Hopefully I find something.

Ok I desoldered all the white/brown #56 wires one pair at a time and the 02 code is still flashing.

Ok I found the issue. Here is a picture. Pinched wire under lamp socket.

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Thank you guys for the guidance on finding the issue. Starting to understand how the matrix works now. So now I move on to the bigger problem machine that I have TAF.

One more quick question what cap do I need to put on the switches?