The machine has a 24 volt mars dollar validator ( 2500 series) and a Coinco mdb coin mech.

Vend price is .75.

If, I insert change the machine will dispense the product. with no issues.

If, I insert 1 dollar bill the machine will dispense the product, but it will not drop the .25 cents in change.  Also, the LED will reflect the .25 cents credit. 

if I push the coin return, then it will drop the change/credit.

I have already swapped out the DBV, the coin mech, the harness and check the three fuses on the mother board.  I am stumped.

nrod7

1. Coinco BA50A validator- blinking (message bill path blocked)  

2. Mars trc 6800 or 6000 - plugged in and filled with coins, red light indicator not on ( next to toggle switches for vend price setting).  Will not accept coin,

    but the payout switches will dispense the coins out of the fill tubes

3. Column one works fine.  I can push vend switch on the motor and it turns.  All the other motors will not turn when pushing vend switch. However, I

    switched the wiring harness connected to vend motor on column one to column 2 and the motor turned.  I found no loose or broken connection on            

     harnesses.

Are these three problem related?

I have do have parts,  but could not get the machine working today.  

Will have to go back out tommorrow.

nrod7