Another Bell Question

[crzipilot]

Sorry for the bell questions I guess.   

I have gotten the correct bell for two of my machines.   I had to create harnesses for them, and they all test ok.    1 machine running 05 1271   and 006174   I was able to hook it up, and turn it on in the settings menu, and it rings on all payouts.  Works great. 

Second machine is running 5 0731   with 4252.     I put the second bell and harness in here and got it turned on in the menu settings.    It does not ring.   I put this harness and bell in other machine,  and it works.   So I know the harness and bell is good.   

What I found strange on the 0731 machine,  is when pressing the white button.   It was a little different sequence.    the first press of the button,  a 2 shows up in the credits screen.   The next press has only a 0 in the coins played,   Third press I believe is a 0 in credits played.   Then on the 4th press it shows 5  0  in the winner paid window.   Turning the jackpot key from there showed me the 6  0  in winner paid.  So I changed that to 6  1.   I'm assuming I was in the right menu? 

Any ideas how to get this thing to ring?   

Thanks

[shortrackskater]

Here is the PSR screenshot showing the bell settings, but I added the entire PSR as well.

[Stayouttadabunker]

IGT programmers made slight changes over the years when producing the SP chips, to accommodate extra internal accounting options they wanted to add for various state gambling commissions and markets.
There's marked differences in the programming between the earlier SP631's versus the newer SP1271's!

[crzipilot]

I have to correct settings set.     Bell is 6. 1


Still doesn’t ring.    Could it be the connection on the motherboard?   

[Stayouttadabunker]

One problem could be the motherboard too....possible broken circuit trace?
or oxidized pins....like the green stuff on car battery terminals.

I'd stick a multimeter on the two pins, test the power output of those two pins in the test options.

If there's no circuit power registering on the multimeter, then the bell wont ring.

Your only choices are at that point are to either fix the broken traces or obtain another motherboard.

[sixcardmark]

To test the bell:  Press white test button until you get 2 in coins played window, then turn jackpot key until you get 16 in winner paid window. Press the spin button to ring bell.

[crzipilot]

Thanks.  I should have thought of that.     

I had gotten in the test menu but I visibly bell didn’t ring.    I’ll try the dmm and see what happens


Thanks

[jay]

You could always swap the MPU between chassis and prove that problem moves with the MPU.

This eliminates other cabinet/harness issues as a problem and will focus the issue as being a MPU issue.

[crzipilot]

Just put the DMM on pins.   

Non ringing machine  12v

Ringing machine 24v.   

So either a bad pin,  or bad trace or something on the mother board.   


Don't have time to swap those out so I'll have to try swapping the MPU at a later time.     

How much does a new MPU go for, for a s+.    Not sure on my board repair skills.  HA

[crzipilot]

So bad news.   Finally swapped motherboards.    Put working mb in and get into setup.   Bell buzz. Doesn’t ring.   Smell something.  Turn machine off.  Take out mother board  and burned trace.    Look on non working board.   Burned trace.   

Previously good board on left.  Bad board on right. 

Looks like bad bell board has another trace burnt out.   So where do I look for these over voltages? 

[Stayouttadabunker]

Something is shorted out in the cabinet...burning out MB's.

Better unplug the machine, pull out the power supply and take it apart.

[crzipilot]

Would it be easier to just replace power supply?    When you say take apart the power supply,   am I looking at rebuilding the thing or what? 

Could it be a short somewhere other than power supply?        The original board had two traces burned out.    I don't notice anything not working on the machine except for the bell.   That obviously is the trace that burnt out on the good MB.     but I didn't play the machine,  so it didn't have a chance to burn out the other trace, whatever it may be, on the good mb

[Trisail]

I don't know where you got your information to build the bell harness.

There are S and S+ machines and motherboards.

The 2 boards you posted pictures of that have burnt traces are not the same 'revision' 'artwork' the one on the left is 75903932 REV B  the one on the right is 75903932 REV A. Probably not a problem. Not all of the connectors are visible.

The burnt trace on the left board goes to J6 pin 5. That pin is 24 VAC Hot for the bill acceptor for an S+ machine as the S machines I believe did not have bill acceptors. Plus the S+ machines have a separate power supply to power the bill acceptors (BV - bill vaidators). None of the machines I have or have worked on had anything plugged in to that connector.

The burnt trace on the right board goes to P/J 2 pin 4 - which I believe goes to the payline 1 lamp on the S machine. And payline 6 on the S+. The other burnt trace is obviously the same one on the left board going to J6 pin 5.

According to the schematics I have - J11 is the 'jackpot' connector which I am assuming is the bell. It is powered by 24 VAC (see picture). On my machine the plastic cover on top of the motherboard is covering that connector, and others, as if they were not used. Looks like you could break off the plastic and plug in a connector.

With the burnt traces on the bad board and now the once good board. I would suggest some troubleshooting and voltage measurement testing on connectors and pins, using the bell test to determine the actual bell connector? And the output voltage before you connect another bell. Using a schematic which may or may not be the correct one may help.

You said your harness works (worked) in one machine but not the other. I would assume the 2 machines are not the same at this point. Looks like one may be an S and the other an S+?

Sorry I didn't look into this earlier to help. The good news is you can repair the traces on the motherboards. The bad ones on J6 you probably don't have to worry about has that connector is not used on the S or S+. If that is any consolation.

More info on S machine in my next post.

[Trisail]

Here is the information I could find for the S machine on the jackpot signal.

Hope this information helps you get your jackpot bells working.



Just an FYI for other members that read this post now and in the future -

As new members to the forum it is always best to post pictures of the machine outside, inside and boards. This way experienced members can tell what what type of machine you are working on and posting about. As new members and 1st time posters it does take a bit of searching, and reading FAQ's to get enough information to know how to post and ask questions for the best results. I was there 3 years ago, still struggling at times, but getting better everyday. I will check the FAQ's and see if maybe there might need to be a 1st time member/poster FAQ that would help.

[crzipilot]

Thanks for the info.   I’m pretty sure they are both  s+ Machines. 

The bad one was operating fine until I started activating the bell option.   Your right about the bill validator as it was working and now it lowers up and does the initialization but the acceptance lights don’t light now.    I jumpered the burnt traces,  it plays   But no bell and no validator.   I jumpered the burnt trace in that one and the bell works fine in the machine it was in.     I tried putting bad board in machine that bell was working but couldn’t get past the errors it was throwing,  so gave up on that.

[crzipilot]

Here some more