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Konica 7145 F-51-2 Error

I have a Konica 7145 copy machine that is producing an error of F-51-2 when I turn the unit on. I had a tech come out and told me that the control board is the problem. I replaced it with a known good board but I am still getting the error.

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  • wolf9545 Nov 06, 2008

    Thank you for the help. Sorry it took me so long to give a reply; I actually lost the email and had to dig it up again. I did the test and didn't hear the the motor turn. Ordered a replacement motor but now trying to figure out how to get the old one out. The reason I didn't rate your answer a full one is because even if I replace the motor there is a chance it may not fix it. Thanks again for the help.

  • wolf9545 Nov 06, 2008

    Well, found out how to replace it and replaced the motor. Tried running the code again and didn't hear the motor turn (little hard to see it). Still get the error when I turn the machine on. I have already replaced the big board that sits right in front of the fixing motor (was told by a copy machine tech that it was that problem, something to do with a fuse) so I don't know what else to try. Is there a code to have the machine reset the codes and do a search again?

  • Ty Schmidt Mar 19, 2012

    the main control pwb ( NOT the computer one) its on the right hand side under the area where the fax/print controler unit would be. its fun to get to. here is the part you need. 40LA -902 9 MAIN CONTROL BOARD UNIT. this part is not as easy as installing it. you need to load firmware on the pwb after installing it. it will code out as soon as you turn it on. the firmware requires a technician to install unless you can download the ISW software and then you need to have a computer with a parallel port and a parallel cable.
    The best way to do it is to get a used (but good) board. i may have access to one.
    This board controls all the sencors and motors. and this is why you are getting this code. contact me for more info



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Code F51-2 at start-up.
Code F51-2 at start-up.
CAUSE: Code F51-2 may be caused by a failed M11 fixing motor. To determine whether or not the motor has failed, use this procedure:
1. Enter the 47 mode (I/O check mode).
2. Input "40".
3. Input multicode "0". If the M11 motor turns, it is good; if it does not turn, the motor has failed.

SOLUTION: Replace the M11 motor (p/n 56AA80072 for 7222/7228/7235 and p/n 56GA73430 for 7145) if it has failed.

hope that help!!!

Posted on Nov 01, 2008


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