Comparator Connector - Bally 5500 pro

[ThirdGenAmusement]

Hello,

I had bought this non working Diamond Lines 7s 5500 pro from a guy who couldn't get it working.  The main issue is it wont accept coinage.  The bv works as does the pseudo coin buttons.  Upon looking around I noticed that a transistor had been burnt(found in another thread recently on NLG during my search).  I had a spare known good board and replaced it but still isn't accepted coins. 

I know the connector that connects to the coin comparator was replaced since I did that in an attempt to repair it before I bought it.  I rewired it with what I thought was correct info.  Of course the wire colors dont match so I have included pics of the connector and pinout location as well as the colors that were originally part of the machine harness where I spliced in the new connector.

Can someone help with verifying the wires are correct on the connector?

[ThirdGenAmusement]

Doing some more searching in NLG, I see Trisail posted the diagram for my exact question which is great!  (http://newlifegames.com/nlg/index.php?action=dlattach;topic=34713.0;attach=104287;image) 

With this in mind, I think my wiring is mirror of what it should be.  I do not see an indication which pinout is 1,2,3 etc on the connector that plugs into the comparator. 

Per the diagram above, it looks like my wires should be Black pin 6, Yellow pin 4 and Purple pin 2.  So I guess now the question is which pin is 1?

[ThirdGenAmusement]

With a pic Jim sent, I was able to confirm my wiring is correct.  So on to the next step down the line on why this isn't registering coins.       

[Trisail]

See if this helps.

http://newlifegames.com/nlg/index.php?topic=32977.0

The coin comparator compares the coin and accepts it if it matches the sample coin. 

The optics board below it check it and sends a signal to but a credit on the machine.

Does the coin go in the coin tray or the hopper when inserted?

[Badbaud]

Is the coin mech switch on the front of the computer tray in the up position?

[ThirdGenAmusement]

See if this helps.

http://newlifegames.com/nlg/index.php?topic=32977.0

The coin comparator compares the coin and accepts it if it matches the sample coin. 

The optics board below it check it and sends a signal to but a credit on the machine.

Does the coin go in the coin tray or the hopper when inserted?

Thanks for the link to the detailed explanation of the coin comparator!  That does really help.

The coin goes through to the coin tray.  I have shimmed the rake so now it just goes to the hopper.  The led on the optics board does flicker so it is 'seeing' the coin./

I did check for voltage at the comparator connector and there is none.  I then checked connections including on the mother board.  Nothing looked bad.  I had read in a few instances the power supply was suspect so I checked mine.  I have attached pics.  You can see the cap with the arrow pointing to it is bulging and leaked and might be the reason why the transistor on the optics board popped.

I do have one more replacement power supply(new) to put in but before I do, is there anything I should check before firing it up with the new power supply?



I appreciate the thought BadBaud.  I can only wish that was the culprit! 

[ThirdGenAmusement]

I replaced the power supply.  No more hum etc heard over the speakers which is great!  I was really hoping this would be the issue since it was pretty crispy. However, still not accepting coins.  The led in the optics board still flashes as the coin passes through.  I did try both rake shimmed and not shimmed.  Both Pseudo buttons work.  The switch is up on the motherboard for coin mech.

So with the optics board that had the popped transistor, is it possible the mother board got damaged?

[Trisail]

Sure anything is possible.

Does the coin comparitor have voltage now?

Just because the optics led flashes does not mean the 'credit' signal is getting to the MPU board - connections wires etc.

Also if you look at the earlier post you did with the schematic you found I posted earlier - you will notice the optics pcb 'talks' to the coin comparitor pcb through a wire from one connector to the other. So if the coin comparitor pcb does not have voltage - it is probably not working electronically. That could possibly cause the problem with no credits bring put on the machine. And maybe why you had to shim it to get the coin to go into the hopper instead of the coin tray.

Looking at the wiring in the schematic - the optics coin sense signal comes from the coin comparitor. This makes sense as both units work in tandem to sense a proper coin so that a credit can be put on the machine. ( something the casinos and patrons were extremely interested in getting right - if you get my drift )

So -

See if the coin comparitor has voltage and will work. If not try to get it to work.

If the small white test button on the optics board will put a credit on the machine with the door open/in test mode, that should tell us the MPU is working OK, BUT is does not tell us the optics pcb is working ok - the white test button bypasses the electronics and just sends a ground to the MPU to tell it a credit is coming.

If that is true - then I would say the coin comparitor pcb may be bad
If that is false and the white test button does not put a test credit or 3 on the machine - the optics pcb is bad - or as you suggested maybe the MPU pcb is damaged.

Let us know what you find and ask questions if you have any.

Put the replacement power supply and see what happens. The old one went bad because the aluminum electrolytic capacitors are old and bad. It can be repaired so do not throw it away. I actually repair them at a very reasonable cost I have been told.

[ThirdGenAmusement]

Very good thoughts.

Coin comparitor isn't getting voltage still even after the power supply change. 

White test button on the optics does put up credits, so that's a plus. I do have a spare coming since I put my spare in this machine just to verify all is good there.  I will also put it in test mode to verify it is receiving the signal from the actual optic just to be sure.

I might try to test the transistor in position Q3 on the optics board or at least verify voltage to it since, per another thread I have read, mentioned it is part of the circuit that powers the comparitor.  This might answer the question if the optics board is doing what it should sooner than waiting for the replacement optics board. 

I will be able to try a few things in a couple of hours when I get back home.

Thanks again for the help and thoughts!

Sure anything is possible.

Does the coin comparitor have voltage now?

Just because the optics led flashes does not mean the 'credit' signal is getting to the MPU board - connections wires etc.

Also if you look at the earlier post you did with the schematic you found I posted earlier - you will notice the optics pcb 'talks' to the coin comparitor pcb through a wire from one connector to the other. So if the coin comparitor pcb does not have voltage - it is probably not working electronically. That could possibly cause the problem with no credits bring put on the machine. And maybe why you had to shim it to get the coin to go into the hopper instead of the coin tray.

Looking at the wiring in the schematic - the optics coin sense signal comes from the coin comparitor. This makes sense as both units work in tandem to sense a proper coin so that a credit can be put on the machine. ( something the casinos and patrons were extremely interested in getting right - if you get my drift )

So -

See if the coin comparitor has voltage and will work. If not try to get it to work.

If the small white test button on the optics board will put a credit on the machine with the door open/in test mode, that should tell us the MPU is working OK, BUT is does not tell us the optics pcb is working ok - the white test button bypasses the electronics and just sends a ground to the MPU to tell it a credit is coming.

If that is true - then I would say the coin comparitor pcb may be bad
If that is false and the white test button does not put a test credit or 3 on the machine - the optics pcb is bad - or as you suggested maybe the MPU pcb is damaged.

Let us know what you find and ask questions if you have any.

Put the replacement power supply and see what happens. The old one went bad because the aluminum electrolytic capacitors are old and bad. It can be repaired so do not throw it away. I actually repair them at a very reasonable cost I have been told.

[Stayouttadabunker]

It's my understanding that a Bally 5500 utilizes a glass prism on the coin-in optics.

Sometimes they fall out....I remember that happened to me once on a Bally I bought from JKMunch.

I remember finding the glass piece down under my car seat.

I could be wrong on this and this could of rather happened to my Bally6000 because I had both platforms at one time, side-by-side.

It was a long time ago.

I wish I was near one to show you what I mean.

I would snap a few photos for ya.

[ThirdGenAmusement]

Thanks Stayouttadabunker.  Good thought and something I will check.  We have snow and ice here today so I'll be home all day and will be able to spend some time on this again.  I do have another set of prism in the event that is gone or missing.  Nice you were able to find yours!  They are little suckers ha!

[ThirdGenAmusement]

I have 24v coming from pin 2 of the connector for the optic board.  I believe this is what powers the Comparator so it isn't the optic board.

Update:  Stayouttadabunker, prism there.  I did take it out and clean it as well as make sure the little holes for the led's as well as the led's were clean also.  Seen some weird things in them sometimes!  ha.

[ThirdGenAmusement]

I started to trace the wiring and found the Blue/Brown wire from the optics didnt complete a circuit to the Blue/Brown on the comparitor which is how the comparitor gets it's power.  I ended up finding a broken wire in the harness after the inner door holding the fluorescent light for the belly and where that loom gets secured at the door hinge.  After fishing around for the other end, I reconnected them and machine works like a charm.

Now it makes sense why the transistor on the optics board got burnt as bad as it did.

Thanks for everyone's suggestions and help along the way!  Time to get this cleaned up and on to the next!

[Stayouttadabunker]

ahhh! Good job finding that broken wire! 

Sometimes wires break inside of the vinyl wire covering and that makes it much harder to find,  especially when the covering is still attached to the end!

[ThirdGenAmusement]

Thanks sir.  It helps to relieve some of the pain from banging my head against this the last few days lol!  Nah, great feeling too get it figured out

[Trisail]

Fantastic. Glad you found and fixed the problem.  Hope all the posts have helped you greatly.