Monte Carlo
Gottlieb, 1987Working on a gottlieb Monte Carlo. The switches ending in 0,1, and 3 all show closed in test mode. 65 does as well. When you start a game 65 is the trough coil and constantly fires. What ties these vertical rows together? Want to understand this better and appreciate the help.
65A43F77-C33D-4DEE-BBED-373C41FA2A77 (resized).jpeghttps://www.pinwiki.com//wiki/index.php?title=Gottlieb_System_3&mobileaction=toggle_view_desktop#Switch_Matrix
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Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info
Thank you for replying Chris. So I found two ic chips were bad z11 & z13. So all switches are working now except 65 which confuses me which diode it is. Schematic says 14 but there are only 13 on there. I also found the one on the end of the board was blown. Wondering if I blew the chip again due to diode being bad
Quoted from Bax1:Wondering if I blew the chip again due to diode being bad
Nope. The worst that could happen would be a "ghost" switch would be reported, and that requires the diode to fail shorted.
For switch 65, my money is on a failed switch or a wire/diode touching where it should not be. Since the game is reporting it as closed, the diode is not the issue. The switch must actually be closed, via the contacts or other. Let's see a pic of it.
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Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info
Look at the lower switch blade. It has a shorter zinc plated retention blade just above it - they sit in the bakelite stack together so are connected.
Your retention blade is bent right up touching the upper switch blade = shorted switch..
See how the retention blade should be with its tip against the lower switch blade:
Quoted from Quench:Your tensioner blade is bent right up touching the upper switch blade = shorted switch..
Quench , Bingo.
Bax1 , Thanks for the pic. It was worth 1000 words.
Both of you, may I use these pics in the PinWiki?
Thanks!
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Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info
Quoted from ChrisHibler:@quench , Bingo.
@bax1 , Thanks for the pic. It was worth 1000 words.
Both of you, may I use these pics in the PinWiki?
Thanks!
ChrisHibler, no problem with me! if you want the PNG version before I compressed to JPG, PM me although I didn't compress it much. I probably need to PM you at some point anyway about adding other content to PinWiki.
Quoted from Quench:I probably need to PM you at some point anyway about adding other content to PinWiki.
Sure...I can see from your posts that you know what you are doing. I like reading your posts.
We can establish a PinWiki account for you. Editing and adding content is relatively easy.
Or, I'm happy to help. I'm retired from my day job now...so it's all pin all the time.
I added the image to the wiki...betting that Bax1 will be OK with it. Scroll down a bit. I want to do more work on this section. I wrote it a long time ago and I could never get my PowerPoint animation to work quite right.
https://www.pinwiki.com//wiki/index.php?title=General#The_Switch_Matrix
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Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
http://www.PinWiki.com - The Place to go for Pinball Repair Info
ok so have some more issues I am finding. I have a flasher and the coil for the left ramp are not working. So Lamp13 is the ramp and lamp 14 is the flasher. I just replaced the coil due to it being fried. must have been fried since I have had this. but anyways. pulled the driver board and tested Q14, Q15 transistors, also tested out Z4 ic. all test out good. what could I be missing? Really appreciate you guys helping.
ChrisHibler
Quench
Quoted from Bax1:tested Q14, Q15 transistors, also tested out Z4 ic.
Quoted from Bax1:Both q1 & q5 test good. Could these be tied to one of these little boards underneath the playfield?
How did you test the transistors and particularly Z4?
The lower left dome flasher lamp next to the left slingshot is on the same circuit as the upper left dome flasher lamp. Are both those left dome lamps not working?
It looks to me like the ramp coil has some sort of End Of Stroke (EOS) switch associated with it that's activated by movement of the ramp. Is that switch operating properly when the ramp is down and up? I guess the switch should be normally closed so the coil has higher power to lift the ramp.
What happens when you very briefly ground the base leg of transistors Q5 and Q1? Do their respective lamp/solenoids flash/activate?
for the Z4 I was in diode test. put the pos lead on the ground and made sure I was getting reading on the other legs. verified vs other like ic's. the flasher next to the slingshots do work. this is the only flasher that does not. the switch for the ramp is open when up and closed when down. so the coil should be activated most of the game play. you have to hit some shots to get it to lower which would close the switch. have not grounded the transistors. not sure which leg to ground and how I could with them being so low on the board. not able to get it at the back when connectors are on.
well
I am officially in the dummy club. I didn't check the fuse and what do you know, it works. the ramp works but the flasher doesn't yet. probably going to look at the socket itself. I have a feeling that is the problem. previous owner had wrong fuses in too. had a 1amp in a 2.5amp spot which obviously fried it and probably the coil too.
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Westland, MI