(Topic ID: 224902)

WOZ problem


By DnDPins

2 years ago



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  • 10 posts
  • 4 Pinsiders participating
  • Latest reply 2 years ago by DCFAN
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#1 2 years ago

I am currently trying to resolve a WOZ ECLE problem and could use the assistance of the great Techs here on Pinside:

Problem: As soon as I turn the machine on, the upkicker to the castle playfield and ball lock bar solenoids fire continuously (munckinland playfiled)

What I have done:
1) Checked the switch matrix, shows both optos as expected for the solenoids to fire.
2) I have confirmed that the Optos, Cables and Opto boards good on both components

I figured the issue would have been somewhere along the opto chain but that is clearly not the case.

What else should I be checking?

Thanks,
Dave

#2 2 years ago

Tests - Switches - Matrixed , do those optos register on the screen when you pass something between them ?

LTG : )

#3 2 years ago

Yes the switches do register when I pass a pencil through the beam. I also confirmed the optos work by patching them to a different port on the Opto board and even swapped in one of my spare opto board and got the same results.

#4 2 years ago

Make sure the opto connectors are connected to the main opto board under the playfield.

#5 2 years ago

Yes the opto cables have been confirmed to be seated in the opto board.

#6 2 years ago
Quoted from LTG:

Tests - Switches - Matrixed , do those optos register on the screen when you pass something between them ?
LTG : )

Hi Lloyd,

Seems I responded incorrectly to your question earlier. It turns out that if I pass something through, neither opto registers in the switch matrix test screen. Does that point to bad optos?

Thanks,
Dave

#7 2 years ago
Quoted from DnDPins:

Does that point to bad optos?

Points to those optos not working.

Could be not plugged into opto driver board below the playfield or loose connector, bad optos ( not as likely ), broken wire at optos or other switches on same row or column, problem on opto driver board.

Using the manual, find the opto driver board pinouts. You can move the connector from a non working opto to a different known working spot, then if they don't work, then bad optos or poor connection from opto driver board to them. It they work ( they will register as a different switch on the screen ) then something else going on.

LTG : )

#8 2 years ago

My game had a similar problem. Verify that the castle door and VUK cable is connected to the correct position of the board under the playfield. The board has a row of 7 connectors. One of them is not used, it has a red stripe. The VUK cable connects beside the unused connector, it has a brown stripe. In my game the VUK was connected to the red connector and the castle doors and VUK operated continuously after power on. Moving it from red to brown corrected the problem.

35753857-DBB8-48BF-8E94-AC5BF9C8AC18 (resized).jpeg
#9 2 years ago

Unfortunately, using the unused port on either opto board did not work.

It seems that my troubleshooting has confirmed the problem is not the Optos, or cables to the optos or the opto boards. Therefore I guess all that is left is the connection from the MPU to each opto board. Interestingly, the problem is on the same port of both opto boards under the playfield.

Troubleshooting:
1) Plugged connector of failing opto to unused port of opto board and while it registers when plugged in, it does not resolve the problem
2) Plugging in the connector of a working opto into the port of the failing one does not register anything at all on the switch matrix
3) Plugging in a spare known good opto on the failing port does not register. (it does on a working port)
4) Swapping a new Opto board on either side results in the same exact conditions
5) Each switch in the same row have been tested as expected

Any ideas of where to go from here?

Thanks,
Dave

#10 2 years ago
Quoted from DnDPins:

Unfortunately, using the unused port on either opto board did not work.
It seems that my troubleshooting has confirmed the problem is not the Optos, or cables to the optos or the opto boards. Therefore I guess all that is left is the connection from the MPU to each opto board. Interestingly, the problem is on the same port of both opto boards under the playfield.
Troubleshooting:
1) Plugged connector of failing opto to unused port of opto board and while it registers when plugged in, it does not resolve the problem
2) Plugging in the connector of a working opto into the port of the failing one does not register anything at all on the switch matrix
3) Plugging in a spare known good opto on the failing port does not register. (it does on a working port)
4) Swapping a new Opto board on either side results in the same exact conditions
5) Each switch in the same row have been tested as expected
Any ideas of where to go from here?
Thanks,
Dave

It may help us help you if you post a picture of the main opto board under the playfield.

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