I am having some problems with my Flinstones.
Here is the Switch Matrix I am having problems with.

The items marked red do not work properly.
The items marked green on same row work fine.

Is it possible to have a faulty u-19 that 5 of the 7 switches work?

The 2 single targets do nothing. The middle of the 3 bank target does not register when knocked down so they do not pop up.
D rollover target at top does not register.

Ball popper sometimes works and sometimes does not. But on machine startup it pops 4 or 5 times.

I have cleaned the opto's and resoldered the popper connections. Checked all switches for shorts. I have continuity on the white/blue wire all the way from the bottom of chain to the plug J209-7. Taking out the CPU board and checked solder connections and possible bad tracks looks like new. Tracks ok.

It did work when I first got the machine and developed this fault. After 2 days the fault went away now it has reared it's ugly head.

Any suggestions as I am completely stumped.

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Hi thanks for the advice. I have pulled the batteries. Tomorrow I will try what I read on wiki making a lead and attaching to pin 1 and testing the other end on the switch matrix pins to see if the problem is on the board.

The problem did correct itself once and now its back again. I have made sure all chips are pressed in and have cleaned the opto's and resoldered the connections on the top popper.

I have also checked with my phone camera the transmitter is working.

When I turn the machine on the top popper pops about 4 to 7 times then stops.

Regards David

I have reseated all connectors several times and ribbon cables.

I have changed all diodes on all switches that were not working even though my dmm tester said they were good.

Took apart all targets and cleaned and checked them for shorts.

Found a burnt and stripped wire on one of the coils repaired that.

No battery leakage its a wpc -s MPU board so battery is housed in front of the board on its own dedicated pcb.

Removed connectors j206/207 and j212 clipped a homemade wires with crocodile clips on to J207 pin 1. Then other end touched to J209 and tested each pin to make sure they worked and showed only the switch that was relevant. Repaeated this across all pins of J207 everything tested out ok.

This points to problem not being on the MPU board.

I also tested continuity of the white/blue wire all the way from the connector to the end of chain and every switch in between. All was good.

Tested the voltage of pin 7 of j209 Blue/White and it was putting out 11.87 vdc

11.83 Vdc was also showing on each switch on the playfield.

The 3 target left bank is not registering on the sensor opto on the (E) of BED centre opto also happens to be the white/blu wire

I have a feeling it may be U19 or the security chip.

Taking a break after 5 straight hours.

I will double check the wires tomorrow and diodes again. plus anything else you cant think of.

pin 7 of j209 should 12v right?

Just checked all diodes they are correct orientation.

I just have found something that may help someone solve this for me.

The Switches on the row that work (2) give 12.2 vdc

The (5) switches on the row that do not work give me infinitum Vdc the meter keeps on going up and up to over 208vdc.

See my previous diagram to see which ones in row work ones that are green (2) of them and (5) in red that do not.

Cheers David

Well what a day it's been but I managed to get the problem sorted. One of the working switches has 2 blue wires going to it under very close inspection one of the wires had been soldered on by the plastic sleeve the wire wasn't even making contact it was still inside the sleeve. Plastic soldered to a metal tab.

However I am sure it was more than this as the many things I covered today was an experience and I managed to find other things that needed fixing or tidied up. I probably cured any other problems before hand.

Regards Dave

The funny thing was I never found it in the day light. My light had blown this evening and the room was dark I was using a led torch and the pure white light actually helped.

All I can say is Yabba Dabbah Doo!