Xerox 3050 Service Manual page 532

(Continued)
Initial Density Adjustment
25. Enter the diagnostic mode.
WARNING
There mav be a time delav between the time
the code i0921-41 is ente&d and the time the
fuser drive motor starts t o turn. The fuser
drive motor will not start until the fuser is at
the correct temperature.
26. Enter the code [0921-41.
@
STEP 28
8:
Each time the Copy contrast
down button is pressed, the next lower
LED will be lit, indicating a lower Control
Point setting. A control point o f 5.3 is
the lowest sensor voltage that can be
attained.
0
To prevent toner control faults, the
Control Point must be as close as
possible to the Sensor Reading before
running copies to check copy quality and
adjusting the density.
27. (Figure 8): Adjust the Control Point to read
as close as possible to the Sensor Reading.
28. Make a copy of the Test Pattern 82E5980.
Check that the density of the (1.0) Solid
square is between 0.7 and 1.0 on the copy,
using the output reference 82P520.
A. If the density is less than (0.7),
perform the Increase the lmage
Density Adjustment (ADJ 9.3).
B. If the density
is greater than (1.0),
perform the Decrease the lmage
Density Adjustment (ADJ 9.4).
.
.
OBSERVE THE CONTROb
POINT VOLTAGE AND THE
DOWN BUTTON
CONTRAST
Figure 8. Adjust the Control Point
ADJ 9.2