Problem with IGT Slot Machine doesn't issue coin credits

[JethroP]

New to this forum.   Hope I am posting to the right place.  Just got an IGT Double Wild Cherry slot.  It plays fine if I feed it paper money, but when I feed it quarters, the quarters go into the coin hopper but no credits are registered.  The LED is not lit on the coin comparitor if that is a clue to anything, and there is a resident quarter in the comparitor.  Any help would be appreciated.

[Badbaud]

The comparator light only comes on when the game door is closed.
Have you tried the pseudo coin button to see if it is accepted so a game can be played with the door open?

[JethroP]

Yes, I press the pseudo coin button and nothing happens.


Also, to see if the coin comparator LED comes on with the door closed I removed the comparator and fed the wire to it through an open hole to the outside of the machine and reconnected the comparator.  Then with the door closed and the comparator outside the machine I observed the LED and it never lit.

[Badbaud]

I would love to see a picture of that setup.
Have you checked all fuses with a meter?
Do you have a burnt pin on the white power connector plugged into the backplane board?

[JethroP]

I tried to upload a pic but said the file was too large.  I'll try to resize it.  Meanwhile:
There are 3 fuses I checked and they were all good.
I don't see any burnt pins on connectors anywhere.
So I also checked for voltage at the connector to the comparator.  No voltage present (door closed and game powered up).  I don't have a schematic, but wonder if the comparator gets its power from the coin optic sensor?  Or where the power is supposed to come from.

[JethroP]

Here's a pic of the coin comparator hooked up outside the game with door closed.

[Badbaud]

Excellent idea on the external CC16.
The CC16 gets it's 24VAC power from the main transformer.
Attached is a schematic of that circuit, coin lockout implies comparator power.

[Jim]

Its a lot easier to do what you are doing by just dropping the belly door, take the bracket off the coin head and you will have the entire unit available with the door closed to actually drop coins through and observe what is going on!

some things you said didn't make any sense, the only function of the cc-16 is to accept the type of metal object used as a sample,  in your case an American quarter, the fact that the quarters were accepted and went to the hopper is a clue, either the cc-16 is working, or it has been modified to accept coins (rake on the back shimmed out)

in the S+ section in the first category, find the "how to guides"  flip cards,  go to the output test #34,  it will test the lockout signal. there is also a test in the input tests to check all three optics and the coin input test button "pseudo coin"  this test will tell what is going on with the optics. 

these cards will allow you to test every feature on this machine, and tell you without a doubt if something is working or not.

Hope this helps
Jim

[JethroP]

Jim,
Thanks for the info on the self test.  I went to test #34 and when I activated the output (press the spin reels button) per the instructions there is no change in the display.


Also went the input section but not sure I am running the test correctly.  When coins played displayed a 1, and I got code 10_1, I dropped a coin though the coin slot, the coin was rejected, and nothing changed on the display.  Did I do this correctly?  Also tried 11_1 and 12_1. 


To see if I was running these test correctly I also tried the door open switch 13_1, and when I opened or closed the door nothing changed on the displays, and I know the door switch actually works during normal operation.  I must be testing wrong. 


BTW, regarding my earlier posting about no voltage present at the coin comparator, I was testing for VDC, not AC.  I haven't rechecked the voltage, but thought I would clarify that.  The schematic and comments from BADBAUD helped.  Now what do you suggest?  Thanks again for your assistance.

[jay]

We can deduce that your door optics are working fine since you said the machine plays fine with paper money.
This would mean your reels are stiff with the power on which would likely discount any issues on the main power connector.



 I don't like the fact that you press the optic credit button and it doesn't give you a credit. This seems to me that it might be a wiring harness issue.I would try changing the sample coin to another quarter. There is also a sensitivity dial on the CC16 that I would suggest making less sensitive but if there is a harness issue this is likely not going to be the silver bullet


It would be handy if you gave us a close up of the wiring harness that feeds the coin comparator and the 123Coin Optic .
For pictures - I usually take with my cell phone then email myself the pic, this triggers the option to send a small version which I upload to NLG.

[Jim]

for the coin optic test, set up the input test, 10_1 in the display, remove the cc-16 completely, now put a Popsicle stick or something similar down into the optic area and move it side to side, you should see the one change to a zero, do the same for 11 and 12, also with 11, you can press the tiny white button on the optic board and it should change as well.

as for the door optic, when in input test 13, just close the door and put down the latch, if the optics are aligned and working you should see a steady  alternating between 1 and 0, when you lift the latch, it will be a steady 1, .

is the rake on the back side of the cc-16 shimmed out so it does not interfere with the coins?

Jim

[JethroP]

Here are the results of the popsicle test: 
10_1 nothing changes.  Remains 10_1
11_1 changes between 1 and 0 with popsicle stick
12_1 changes between 1 and 0 with popsicle stick


Pressing the white button on coin optic sensor does nothing.


Test 13 when I close the door the state does not alternate.  Remains 0


Pics of wiring to cc-16 coming

[JethroP]

wiring to cc-16

[Jim]

as for the tiny white test button, it will only work in 11_1,

Jim

[jay]

Does the game still play with Bills ??


If so the door has to be closed .....

[Jim]

Jay, went back and read post #1,   he did say it worked using bills, so the door optics have to be working.

[Jim]

, but when I feed it quarters, the quarters go into the coin hopper but no credits are registered. 

is the rake shimmed out on the cc-16? ,  if not then the cc-16 must be working in order for the above to take place!

[Jim]

also noticed that the purple wire is connected in post #5  (between the red loop),   in the latest picture its not hooked up, ( or at least these old eyes don't see it correctly??)

[JethroP]

Good eye!  I must have broken that purple wire in-between pictures.  However, I repinned it and the problem still persists.  Here's a summary so far:


The optics sense the popsicle stick in test 11_1 and 12_1.  During test 10_1 the state remains at 1 and does not change to 0.  Also, during 11_1 the white button on optics board does nothing when I press it.


I wiped the door optics and test 13 now works.


I removed the coin optics boards and cleaned the 3 transmitter and 3 receiver sensors.  Makes no difference in the tests.


Yes, Everything else in the machine seems to work fine, accepts dollars and issues credits.  Game plays fine.  Cash (quarters) returned when cashing out.  Only thing that is not working is it won't issue credits when I put quarters in the coin slot.  If the power is off the coins are rejected to tray.  If power is on, the coins go to the inside coin hopper, but no credits are given for the quarter.

[JethroP]

SOLVED.  Wanted to close the loop and report what worked.  I removed Q4 from the coin in optics board and everything is working now.  Thank you all for the responses and guidance.  This forum rocks!