Connect with us

Coinco coin changer Logic Board

Discussion in 'Troubleshooting and Repair' started by rudy25, Dec 1, 2013.

Scroll to continue with content
  1. rudy25

    rudy25

    3
    0
    Nov 30, 2013
    Hi, just signed up, I am trying to repair a Coinco Lower Logic Board P/No 903037 rev 7 and there is a zener diode marked DZ7 609 for which I can find no info, is it 9 volts? supply to board is 18v ac then via a bridge rectifier and zener to the board's circuitry.
    I am also trying to draw a schematic but am getting a headache, anyone out there have a schematic already?
    The coin changer is out of a Dixie Narco vending machine, the whole coin changer is S75-9800A and the repair manual (available online) was printed July 1988 but does not go into circuit board level.
    Help would be most welcome
    PS I posted this in Manuals and schematics but Forum advice was to post it here so now it's in twice:confused:
     
  2. davenn

    davenn Moderator

    13,865
    1,956
    Sep 5, 2009
    Coinco Lower Logic Board P/No 903037 rev 7 ..... I dunno what one of those is ??

    maybe some pics would help us guys help you (sharp and well lit)

    I will delete the other post for you

    cheers
    Dave
     
  3. rudy25

    rudy25

    3
    0
    Nov 30, 2013
    Coinco coin changer

    Hi Dave, thanks for the response, the photo I'm sending has the back of the pcb superimposed so I can trace the circuit better but the big diode in the bottom right hand corner is where the zener should be, somebody said try that but luckily nothing blew up, I hope the photo is not too big as it's blown up a fair bit, I would have put the zener back in but haven't had time, maybe it's still good (I didn't take it out so maybe just the solder joints were burned a bit too much.
    Meanwhile here we go.
    Cheers ... Rudy
     

    Attached Files:

  4. rudy25

    rudy25

    3
    0
    Nov 30, 2013
    Hi Davenn, picked up from a forum dedicated to vending machines that the zener is 12 volts and I presume 5 watts.
    I tested the zener with two 9 volt batteries in series and a 1K resistor and it proved OK, found that the thermal fuse hidden under the transformer that supplies 18 volts to the circuit board (from 110 volt supply) had blown, put in a new one (119 deg C) and that fixed the whole machine (it's there to blow if there is a serious jam up and the transformer gets hot and it works!).
    Thanks again for your attention
     
  5. davenn

    davenn Moderator

    13,865
    1,956
    Sep 5, 2009
    no probs
    I couldnt really help too much on that one
    not something Im familiar with working with

    pleased you have had success :)

    cheers
    Dave
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-