Need Help Mutoh VJ1204 Print problem missing half black HELP

[scott dunacn]

Mutoh VJ1204 Everything is perfect except the one section. Done everything except new print head.
the first test print only half black is working so i saw this post. A good way to troubleshoot is to simply swap the black damper's positions, run a cleaning cycle and then another test print. If the channel that wasn't printing before still isn't printing, most likely your head is fried. If the problem moves however, it could be an air leak or plumbing issue above the head that is causing the issue. It could also just be clogged in which case a good head soak and strong cleaning should help if not a full on manual flush with a syringe. so i put new dampers on black new 0 ring this is before the test print this is after cleaning and this a print please help

 

[Modman]

Keep running the clean cycles and see if it gradually improves also check your drain tubes leading down into waste bottle to make sure your not partially plugged off

 

[scott dunacn]

i fixed it thanks for the info

 

[Jim Hancock]

What fixed it?

 

[scott dunacn]

cleaned the manifold, 5 cleanings, new dumpers, 0 ring, brass nuts works like a new one

 

[Modman]

Good deal

 

[Jim Hancock]

Excellent! It's all about ink tight integrity - no air leaks allowed...

 

[scott dunacn]

? my mutoh 1204 has a life times (head) & life times (PF motor) happens when i turn the printer on how do fix