Service Manual
B-1
Appendix
B
Test Patterns
Figure B-1 Inspection /check pattern
0
64
00
1111
17
12345678
000 0
12345678
0 0
12345678
0 0000
12345678
0 0 0
12345678
0 00 0
Engine firmware level
Print count
Eight-step
increments
Gradations
are seen in
this range
Gradations
are seen in
this range
128
step
gradation
128
step
gradation
100% fills
Thermal head temperature set:
This indicates the currently set
value of DIP switches 2-1 through
2-8. 0 means ON. The four other blue
bars are alternate settings for lighter
or darker printing.
Vertical banding
Horizontal banding:
Check Y-motor action
and drum belt tension
(Chapter 9)
Gray fill
(acceptable)
Note: Gray fill appears
"plum"-colored
Dropout caused by
thermal head misalignment.
Adjust printhead skew
(Chapter 9) to correct.
Registration marks
Gray fill
9015-30