Oki LP-1040 Maintenance Manual page 644

(2) Gradation chart: Five positions
<Items to Check>
- Low density patches
- Density differences between sensors
<Check and Criteria>
- For low density patch
Check that the 2-density patch is printed.
When any of the 2-density patch is printed, the results are OK. If the 2-density patch is
missing completely, the results are negative.
- For density differences between sensors
Compare the gradation chart of neighboring sensors.
If, between the neighboring sensors, gradation charts' density difference level is one or
less (one deinsity level represents the value 2), the results are OK. When the level is
more than one, the results are negative.
Example:
The results are negative if:
- Block A's 2 density is higher than Block B's 4 density; or
- Block B's 4 density is higher than Block C's 6 density.
11-46
Compare with neighboring sensors