GRAPHTEC SignJet JS310-25ES, Service Manual, Page: 85 / 141

8. Print Head Adjustment Procedures
78 JS310-UM-251-9370
(6) Adjust the spacing between diagonal lines for the front and rear print head.
Adjust the spacing so that the diagonal lines are perfectly aligned with each other.
The line printed
by the print head
of rear.
The line printed by
the print head of
front.
Upper screw
Upper screw
Rera Print Head Left screw
Left screw
Rigth screw
Rigth screw
1
3
2
Front Print Head
1
3
2
How to up the printing line:
Loosen an upper screw, and then tighten
a left and a right screws.
How to down the printing line:
Loosen a left and a right screws by the
same rotation, and then tighten an upper
screw.
(7) Print the adjustment pattern once again and check the results of the adjustments made.
Repeat the printing and adjustment procedures until the positions of the vertical and diagonal lines are
satisfactorily aligned.
This pattern is printed by a front
and rear print heads.
(8) Perform the same adjustment procedures for the magenta, black, and yellow print heads.