Our shop's Mimaki UCJV300-130 has been getting a motor x 401 error, From everything I read it said to start with the belt tension and try to adjust that. I did that and now when I turn the machine on I get System halt 1 for the slider board. I checked fuses, none were blown. I was told by another tech that it could be the cable between the main board and slider board but I'm not finding that connection. Does anyone here have a service manual or a wiring map of this machine or any tips on what to try next?