Exposure Control Rap; (W/ Tag/ Mod 30) Rap - Xerox 3050 Service Manual

(Continued)
0
Position the DMM and the
Electrometer as shown in Step 7 ,
Figure 3. Ensure that the doors are
closed.
16. Press the Stop button.
Background (Exposure) Check and
Adjust
Q
The background voltage on the drum
is adjusted by adjusting the voltage
to the exposure lamp.
A
WARNING
T ere will be a time delav between the
time the code (0921-31 is entered 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.
17. Enter the code [0921-31.
(9 When code [0921-31 is entered, the
setpoint will automa tically start at
191.
18. Adjust the exposure voltage.
A. Wait 15 seconds and note the average
readings at set point [9].
B. If the voltage measured in Step A is
more than 0.200 VDC, check the
following:
a Electrometer to meter leads are in
the correct position (refer t o
Figure 3)
Check the Exposure Control RAP
(CQ 27)
a
Document Handler is in place
a Ensure that the lens i s clean
a
Ensure that the (2) sheets of white
paper are on the entire surface of
the platen.
a
Ensure that the photoreceptor was
not exposed to sun light. If it was,
rest the photoreceptor overnight.
Ensure that the correct
Photoreceptor Drum is installed
(1 R8l).
a If the voltage at set point [9] is still
above 0.200 VDC and all the above
conditions are checked and
correct, replace the Photoreceptor
Drum.
Scroll down from [9] stopping at each
setpoint (8,7,6, ...). At each setpoint
wait 15 seconds and note the meter
reading. At the first setpoint that
displays
an
average reading of 0.020 to
0.050 VDC over the average reading
noted at set point (91, press thestart
button to enter this setpoint value into
NVM.
If the exposure voltage can not be
adjusted to specification, go to C Q 27
Exposure Control RAP.
19. Press the Stop button and switch off
Electrometer.
20. Switch the power off
2 1. Remove the Electrometer.
22. Remove the Document Handler and the
two (2) sheets of clean 20 pound (80 gsm)
white paper.
23. Reinstall the Document Handler.
24. Switch the power on.
I f the copy quality at this point is
unacceptable, and the Electrostatics
are set correctly, DO NOT CHANGE
THE EXPOSURE. Shifting o f the
nominal electrostatic setup
introduces premature failures and
early recalls. Go to the appropriate
Copy Quality Procedure.
(Continued)
ADJ 9.2