Adjustments; Adj 3.1.1 Density And Color; Balance (C55/C55Mp) - Xerox DocuPrint C55 Service Manual

ADJ 3.1.1 DENSITY AND COLOR

BALANCE (C55/C55mp)

PURPOSE:
To adjust the Density and Color Balance of the
print generated by the ESS.
This procedure actually consists of three

adjustments.

ADJ 3.1.1A Color Density (C55/C55mp)
ADJ 3.1.1B Black Density (C55/C55mp)
ADJ 3.1.1C Color Balance (C55/C55mp)
CHECK:
NOTE: Do Not make changes in the Density
or the Color Balance without first consulting
the customer. The customer may have altered
the balance in the print drivers to achieve
specific results with their documents.
NOTE: It is often difficult to detect changes
when performing this procedure. You may find
it helpful to first run the Printer Diagnostic test
pattern (SERVICE, TEST PATTERNS,
DIAGNOSTICS). Once the adjustments have
been made, run another diagnostics pattern
and compare it to the first. Expect to see the
following:
Color Density adjustment; changes the Cyan,
Magenta, and Yellow, Density Rate Setpoints
and Developer Bias equally.
Black Density adjustment; changes the Black
Density Rate Setpoint and Developer Bias.
Color Balance adjustment changes the Cyan,
Magenta, and Yellow Density Rate Setpoints
and Developer Bias depending on the amount
and direction of change.
REPAIRS/ADJUSTMENTS
ADJ 3.1.1
Run a print of the Color Balance Test Pattern
(SERVICE, TEST PATTERNS, PATTERN
TYPE, PCL, COLOR BALANCE.
1. (Figure 1): Examine the existing density
and color balance with the customer.
2. If adjustment is required, refer to the
appropriate procedure.
Density And Color Balance Adjusment
Test Page
1. Adjust Color Density (30% Halftone): CYAN + MAGENTA + YELLOW
1 2 3 4
Current
Decrease Increase
2. Adjust Color Density (30% Halftone): BLACK / GRAYSCALE
7 8 9 10
Current
Decrease Increase
3. Adjust Color Balance: Choose The circle Which Best Matches The Gray Reference
abcdef abcdef abcdef abcdef abcdef abcdef
19
24
20
13
14
18
Gray Reference
Current
15
17
23
16
21
22
Xerox Corporation, 1996 ver 1.2
Figure 1. Density and Color Balance
Test Pattern
2/99
4-56
ADJ 3.1.1A Color Density
CHECKING THE COLOR DENSITY
1. Press On Line to put the printer in the Off
Line mode.
2. Press Menu.
3. Press Next until <SETUP > is displayed.
Press Enter.
4. When <COLOR ADJUST> is displayed
press Enter.
5. Analyze the test page and choose the
5 6
number which
Density the customer desires.
mind that this is a 30% gray. Darker is not
always better.
11 12
ADJUSTING THE COLOR DENSITY
1. Perform the Color Density Check.
abcdef abcdef
2. Press Next until <COLOR DENSITY> is
displayed. Press Enter.
3. When <CHOOSE NUMBER> is displayed,
press Enter.
4. Use Next/Previous
numerical setting.
5. Press Enter.
6. Confirm the change.
7. Analyze the test page and determine if
additional adjustment is required.
8. Press Next until OK ALL CHANGES is
displayed, then press Enter.
9. Press On Line to return the printer to the
On Line mode.
(C55/C55mp)
represents the Color
Keep in
to change the
DocuPrint C55/C55mp