Read Sharp AR-C250 (serv.man41) Technical Bulletin online
GMA050702
Sharp Electronics (UK) Ltd., Technical Services Group
If the colour patch is judged to be abnormal, select “Repeat” to reprint the test
pattern.
pattern.
Once the test pattern is rescanned and the colour patch is judged to be normal,
press OK. Wait until the message “Please Quit This Mode” is displayed before
exiting the test simulation.
After completion of this command, make test copies using the Sharp Colour Test
Chart (UKOG-0283FCZZ) and confirm copy quality. If the customer is satisfied with
the quality, calibration is complete.
If the copy quality is not acceptable, perform Manual Colour Balance adjustment:-
Manual Colour Balance
Test command 46-21:
This adjustment needs to be performed if:-
a) You are unable to get a satisfactory result from the automatic adjustment.
b) To suit individual customer needs.
a) You are unable to get a satisfactory result from the automatic adjustment.
b) To suit individual customer needs.
Enter Test Simulation 46-21, select “A3” paper, and verify that all values are set to
500.
500.
(After completion of TC 46-24, this is done automatically).
Press “EXECUTE”.
A colour patch image will be printed. Examine the printout, and determine the
following:
following:
1) Patch “A” of Y, C, M, and K is not visible.
2) Patches “B through E” are very faint. (“B” & “C” not visible is acceptable).
3) The patch density for each colour should change gradually from high
density (left) to low density (right).
4) Each colour should be roughly equal in density. For example, Cyan should
not be noticeably darker than Magenta, or vice- versa.
Note: If the four colour “gamuts” are too intense between “G” and “A”,
background may result. A noticeable “drop-off” in intensity should occur near
“G”.
background may result. A noticeable “drop-off” in intensity should occur near
“G”.
Cont’d
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