How old is it? I had to replace FFC cables in UJF-3042 from 2010 to get power enabled to slider board (Mimaki checks for good connection before sending power), it could be a similar issue. The cables themselves tested end-to-end ok (metered), but I think the exposed connector ends just got too compressed/worn out to make a reliable enough connection in the sockets.
FFC cable is cheap - I'd look there first.
That is a very good suggestion. My machine is 2018 ucjv300. I did a similar check end-to-end with meter. How did you narrow down which FCC cable was the issue? Did you end up replacing boards only to find out still not getting power?
- Did you try any techniques that tipped you off which FCC was bad.
I see the main PCB has a led or two lit up even with the power off (plugged in, but not fully on). Do you know if any other boards are supposed to have a similar led on before the power is turned on at the control panel.
- I am a newbie to Mimaki so sorry for any silly questions
- When you say it checks for good connections: is it checking all the way down the chain of components? For example : I have no power at my Station IV PCB, as well as CT PCB, and LED Drive PCB. Can I isolate and test cables just for Station IV PCB, and leave cables to other boards disconnected until I get some LED's on station IV pcb. Or will leaving the dependent connections downstream prevent even the host board from getting powered up. ( I believe CT PCB depends on power from Station IV, so I am calling CT PCB "downstream" and Station IV its "host"). Sorry for the made up terms. Hope it makes sense. I was basically thinking if there is way to isolate and focus on one board getting power, then move on to the next.
Thank you!