Lexmark 4039-1XX - Manual (Page 28)

14 Service Manual
4039-1XX
.
If any voltages are not correct replace the system board.
Note: “Contrast” on the Diagnostics menu (changed to “Transfer” on
4039 plus machines) does not adjust the print contrast but changes
the transfer algorithm slightly.
Users who run large jobs with very dense graphics in high humidity
environments may get some print quality improvement from
changing this setting; users with more normal jobs will see no
difference.
Make sure the HVPS contacts to the transfer roll housing are in good
condition.
10R/12R/12C/
12L
16L
Voltage while
Printing Voltage while
Idling
J20-1 to J20-4 J17-1 to J17-4 Less than
1VDC +21-26VDC
J20-2 to J20-4 J17-2 to J17-4 Greater than
1VDC Less than
5VDC
J20-3 to J20-4 J17-3 to J17-4 The meter
should fluctu-
ate slightly
between
each page. Less than
5VDC
J20-8 to J20-4 J17-8 to J17-4 Less than
1VDC +21-26VDC
10P Voltage while Printing
Voltage
while Idling
J14-1 to J14-4 Less than 5VDC 0VDC
J14-2 to J14-4 Less than 5VDC 0VDC
J14-3 to J14-4 The meter should
fluctuate slightly
between each page. 0VDC
J14-8 to J14-4 1VDC 6VDC