Rice Lake Okidata 320-390-420 Turbo - Service Guide - Manual (Page 91)

Page: 47
Service Guide ML320/321Turbo
Chapter 4 Adjustments
4. ADJUSTMENT
(1) Be sure to carry out these adjustments with the printer mechanism installed on the lower cover.
(2) Be sure to carry out these adjustment operations on a level and highly rigid work table (flatness: less
than 0.039 inch or 1 mm) so as to minimize adjustment error.
4-1-1 Gap between the platen and the printhead
1) Parallelism adjustment
Variation of value at the left, the center and the right shall be less than 0.02 mm. It shall be measured at 3
points: the left end, the center and the right end of the platen.