jerry1973 Posted July 30, 2015 Share Posted July 30, 2015 I have had this AP 113 on location for close to 2 years and it has always worked great. This last Friday, It was brought to my attention that one of the entire shelves errors with "make another selection". I of course have checked and made sure that the shelf is plugging into the connection in the back of the cabinet when closed. I also swapped shelves with another one in the machine and the problem followed the shelf to its new position. That tells me that the problem is in the shelf and not the chassis or connections or harness, I also checked all the wires to the motors and everything looked good and tight. Any ideas of what would cause an entire shelf to not oporate that I have not thought of? Link to comment Share on other sites More sharing options...
AngryChris Posted July 30, 2015 Share Posted July 30, 2015 Check to see if any of the motors are disconnected. Also check for excessive gunk built up on the male connector. I don't think it happens on APs, but sometimes you have to test vend motors on some machines to get them to be recognized. Link to comment Share on other sites More sharing options...
falls Posted July 30, 2015 Share Posted July 30, 2015 Looking at the cct diagram for the machine would hazard a guess at a problem with the wire on pin 12 of the shelf plug. This is the shelf selector wire (ie shelf A, shelf B, etc) and is then commoned to 1 side of all the motors. Check the wire with a multimeter or buzzer for continuity - it is possible for a wire to appear visually intact and connected but not be electrically connected. This could either be a dry joint (solder joint that appears intact but has flux/oxidisation electrical failure) in which case resoldering the joint will cure it, or a wire that has become brittle and has stretched or broken from repeated bending (fatigue) inside the insulation. If the latter you will need to replace that length of wire with a new one. Link to comment Share on other sites More sharing options...
SCOTT1963 Posted July 30, 2015 Share Posted July 30, 2015 One thing I like to do is use a 9volt battery to test motors when you have a tray out the machine. I solder leads onto a 9volt, crimp alligator clips on the other end, and then touch each motor to see if it spins. It is also good for testing transport and stacker motors in Validators. Anyway, if the problem follows the tray you have a bad motor(or homing switch on the motor) that is shorting out or the motor harness usually. Link to comment Share on other sites More sharing options...
AZVendor Posted July 30, 2015 Share Posted July 30, 2015 Check all the shelf rollers on the suspect shelf to ensure they are there and TIGHT. If the shelf doesn't line up properly when slid back in the pins on the shelf connector or in the cabinet connector can be damaged. If this happens you'll find either one pin on the shelf shorter than the others or one slot in the cabinet connector won't have two shiny metal pieces in it. Each slot should have two visible shiny contacts and each shelf pin should be out at the same distance. If either connector has an issue then that's probably where the problem is. Since this issue traveled with the shelf then check the pins. Don't forget to use the shelf position selections for testing and not the shelve's selection numbers after you've moved the shelf. Link to comment Share on other sites More sharing options...
rmorris1953 Posted July 31, 2015 Share Posted July 31, 2015 Very good answers here... I would like to add sometimes the male plug on the back of tray can push a pin in a bit and not make contact. My guess is it would be on the common. Or like mentioned a broken wire on the common. Link to comment Share on other sites More sharing options...
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