Anyone familiar with Change Mate machines?

Frax

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Doesn't seem to be too much info floating around. These seem to be some cheapy coin changers. I got one from my in-laws that has been in storage for a good long while. Cleaned all the goo out of the acceptor and it's still not validating any dollar bills I have. Just reads and spits back out.

Is there any thing I can do to see why it's rejecting bills? It's a CM-50 and was made in 94 if that helps anyone. I'm noob to this stuff, and I'm not against wiring a button to the solenoid to get it to spit out 4 quarters but would like to see if I can fix it before hacking it.
 
what brand of validator is in it?? a lot of the bill validators will flash a diagnostic code if the problem lies in the validator....just a thought...
 
I don't have any clue lol. I will try and see but there were no markings on the pcb in the validator that I could see without completely removing them. Theres only two leds, two recievers, and a magnetic reader in there. Not much to it. The whole electronics bit is maybe three or four postage stamps in size as far as I can tell.

The whole validator is only attached to the machine chassis with one thimbscrew and a 4-wire harness.
 
Sorry to bump an old thread, but I just grabbed one of these and I'm wondering what's the easiest way to install a button to set off the solenoid. Will it only go off if a bill is validated or can you bypass that?

I have no experience will bill changers or this specific model, so any help is appreciated. I have a manual with schematics I can post later if that's helpful.

Juice%20Mate%20changer.jpg
 
ok i am glad to hear you have schematics. did they come with the manual? i just bought a cm-50 a little bit ago so i will be looking into it.
 
mine claims to come with the manual also so i will keep you posted. my plan likely is to wire in a replacement bv if i cant get the old one working. my impression from someone elses cm-50 on this site is that it is 1 pulse releases 4 quarters. so it shouldnt be to hard to put in a button or another bv.
 
Yeah, mine came with a manual with schematics. I can take pictures of it if need be.

Please scan that manual and schematics. There is presently no information on those EL CHEAPO changers out there and it would be of great help. Same with interior pictures. These changers show up alot on ebay because of their low price & small size.

It would be helpful to get the make, model, and operating voltage of the bill acceptor too from it's nameplate.

EDIT: Found this comment on another forum.

"I wouldn't spend a lot of time or money on these units. If I remember correctly they are the ones sold by Coffee Inns out of Arizona. The acceptor had no real logic and was easily beat. The biggest problem with these was the transformer dying and needing to be replaced."

Probably be a good unit for home arcade use.
 
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mine arrived. looking at the little manual that came with it it looks like the blue and red are 12v and the 2 green lines activate the coin slider. looking at it all that needs to be done for a button is get a 120v push button switch unplug the 4 pin plug. make a 4 pin plug wireing harness with push button using the 2 green lines. this doesnt do much for my problem as i would like to use the bv unit. I am likely going to wire in another bill validator myself. but it is not urgent at this point. ken do you know anything about this bill validator at all?
 
ken,

to be quite honest the bv looks like it was custom. on the bottom there is even a port to put batteries in it. the unit is a 12v dc accepter. the unit was made by automatic marketing industries this is the cm-50 model as opposed to the cm-100/cm-222 units that use dbv 10/20. the bv looks like it is ran by an I8031 and there is a 27c64 socketed rom. the unit indicates it was made in 1994
 

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I just got one of these machines for home use. Thanks for posting about about the details of the machine's wiring. I hooked a button up to dispense since the DBA is fussy. If you manage to get another DBA unit working please share your results!
 
Mine arrived. Looking at the little manual that came with it, it looks like the blue and red are 12v and the 2 green lines activate the coin slider. Looking at it, all that needs to be done for a button is get a 120v push button switch, unplug the 4 pin plug and make a 4 pin plug wiring harness with push button using the 2 green lines. This doesn't do much for my problem as I would like to use the bill validator unit. I am likely going to wire in another bill validator myself, but it is not urgent at this point. Ken, do you know anything about this bill validator at all?

I do not know anything about that bill acceptor. Judging by the schematic in that manual you scanned (thank you! ) it would appear the green wires are the relay switch for paying out and the red & blue wires are incoming power for the bill acceptor. You mentioned 12 volts for power. Is it AC or DC? If DC, I would assume red is +12 volts and blue is ground?

If that is the case, there are several brands and models of stackerless bill acceptors/validators that operate on 12 volts DC such as the Pyramid Acceptors' Trilogy series:

http://pyramidacceptors.com/trilogy-series/

Or their Apex series:

http://pyramidacceptors.com/apex-7000/
 
To Ken's point - that has been my experience with these little changers also. Check the power supply inside. After a while they fail under load. I fixed one with a wall wart once. A nice cheap and easy fix.
 
Rise!

Late to the party by 11 years, but I have some info for those that still have these change mate 50 machines! Now days even used change machines are too expensive and most large and bulky. The Change Mate 50 is great for home arcade use, cheap, and it's small profile is ideal. The 120v bypass momentary switch recommended above was a nice fix, but I wanted to feed it real bills for the nostalgia. If you are up for a little project here is how to do it!

The bill validators on these CM-50 units are a real pain and old only sometimes accepting $1 bills if you are lucky. I had 2 I tried to get to work, but even after a cleaning, recap, new magnetic heads, crisp bills, eeprom dump verifications, it would only accept maybe 1/50 times. I spent too much time trying to make it work, but there is another solution:

Upgrade to a Top TB74 12v Bill validator! It will work with the new $1,$5 even up to $20 bills, for this small change mate unit, I'll disable everything after $5. The TB74 has a small profile, and you can dremmel cut through the metal of the Change Mate CM50 lid and mount the TB74 into the top of the unit or you could do it on the side. We then can splice or piggyback solder into the CM50 wiring harness with a small latching relay board running the show and it will utilize the existing 120v solenoid and drop the bills right down into the change mate 50. The old CM-50 bill validator can remain in place to fill the bottom void.

First ensure the CM50 power supply is working. The power supply is behind some metal shielding and is simply a wall ac/dv 12v adaptor plug, 380-400mAH with its 12v output lines going to the oem bill validator harness and the incoming 120v going to the ac/dc plug prongs. While this power supply will run the TB74 validator, you would want to match the power requirements and swap out the plug with a higher mAH. The Top manual TB74 says 11-12v, 2A operating, but I ran it much lower without issue.

My TB74 came with 2 harnesses, a metal face bracket, sticker, a sticker surround (pic attached) around $65 shipped from Ali, prior to tariff increases.

The latching board will run on the existing CM50 12v lines. When the TB74 validates a bill it send a pulse to the latching board and will activate the 120V solenoid for a short pulse to dump the coins and then flip it off (set the TB74 dip switches for 2 pulses/ $1 bill). Wire up the latching board (see pic) and jump into the existing CM50 harness for all the wire hookups.

Its a tight fit for the TB74 between the side lid and the quarter dispensers on the top but it will fit with some metal dremmel cutting and filing. Use the TB74 metal faceplate as a template. See pics for my cutting spot measurements. I ended up mounting the TB74 so its light is facing the user, since bills are accepted in any direction, it works nicely. This also allows the wiring harness plug of the TB74 to not be smashed up against the side of the Quarter dispenser.

Dip switch settings bank 1, 1-3: Off, Off, On (2 pulses 1/dollar). Customize the rest of the dips if you want bills accepted or rejected. A $5 will send a 5 time activation to the CM50 solenoid automatically to dispense the 20 quarters.

Dip switch setting bank 2, left on default settings.

Now you can run $1, even $5! When you first power it on, it will dispense once. If the solenoid is stuck on humming, push the latching board red switch button so the LED light switches over to the Normally Open "N.O." spot. It will remember this moving forward.

Be careful with the live voltage, build a little project box to house the latching relay so it wont short out or you hit the bottom of the board when its live. Wear PPE when using the dremmel to cut the metal lid, it will cut through with a metal cutting blade.

Video of it operating, fyi only 1 quarter hopper was filled in that vid. fill all 4 tubes to have them dispense 4 quarters.

Good luck!
 

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Thanks for filling in the blanks. This will help someone.
Someday.
Probably 11 years from now.
 
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