Gradation Adjust - Minolta CF1501 Service Manual

(17) Gradation Adjust

This adjustment must be made in the following case:
• Color reproduction performance becomes poor.
Adjustment Procedure
1. Call the Tech. Rep. Mode to the screen.
2. Touch "Gradation Adjust."
3. Press the Start key to let the copier produce a test pattern.
4. Place the test pattern produced on the Original Glass.
5. Place ten blank sheets of A3 paper on the test pattern and then lower the Original
Cover.
6. Press the Start key (to let the copier start scanning the original).
✽ When the copier completes scanning the data on the original, the "Tech. Rep. Mode" ini-
tial screen reappears.
7. Repeat steps from 2 to 6 twice (a total of three cycles).
8. Touch "Gradation Adjust" and check the Conv. Value on the screen.
Results:
If Max. falls within 0 ± 100 and Highlight within 0 ± 60, then it completes the adjustment
procedure.
If neither Max. nor Highlight falls outside the specified range, perform steps from 2 to 6.
If the specifications are not met after another cycle of steps 2 to 6, make a copy and check
the image.
9. For any image quality problem, take action by referring to TROUBLESHOOTING.
D-87