Roland CJ500 weird issue

[Carlo]

Hello, I own a roland cj500 and I have a weird print issue, when I make a test print it is perfect, but when I start to print after 4 to 5 inches I loose the yellow. I pause the printer and resume the print and everything goes back to normal, but after 4 to 5 inches of print it starts again and I loose the yellow. If I cancel and do a test print, It is perfect. Any suggestion please? this is driving us crazy.... I did a deep cleaning and nothing changed.

 

[J Hill Designs]

perhaps a bad damper, or slight leak in yellow line

 

[Carlo]

I will change the damper, however it is always full with yellow, I'll post the result, Thanks!