Unfortunately I don't have a manual for this machine
However I did find this post from NickYerPesos, machine is now working fine without the note acceptor
to go into test.. have your machine on and open the top door. wait for it to say doors open or read meters or similar. then find a button that is located within the back area of the machine (not the little red button)... there should be another behind the wood where the reels are.. just feel around until you find it.. it may even be behind the bottom door area.. basically just find another push button switch. then push that at the same time as pushing the little red test switch on the mpu gamecard. the machine should say the word "test" and your in test mode.
use the transfer and exchange buttons to navigate through the menu untill you find note acceptor settings, or bnv key... press start to enter that menu.
then use hold 1 and 2 and exchange transfer buttons to change the bnv key to 0 0 0 0 0 0.. then press start abd it should update.
I mainly work with bellfruit so cannot guarentee the exact buttons or phrases used.. but you get the gist..