Lexmark 4039-1XX Manuale Utente

Diagnostic Information

Black output is usually caused by an incorrect high voltage in the 
printing process, resulting in toner development on the entire 
photoconductor drum. Check the condition of each HVPS contact 
and make sure they spring back when pressed. Check the continuity 
of the HVPS cable. Make sure the following voltages are correct; if 
they are not, replace the system board.

Make the following voltage checks while printing and again while 
idling. If the voltages are not correct, replace the system board.

J14-5 to J14-4

 J20-5 to J20-4

J17-5 to J17-4

+24VDC

J14-6 to J14-4

 J20-6 to J20-4

J17-6 to J17-4

+24VDC

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 
0.5VDC

J14-1 to J14-4

Less than 
5VDC

0VDC

J14-2 to J14-4

Less than 
5VDC

0VDC