Lexmark Optra C710 Service Manual page 159

5016-001
FRU
4 HVPS
Grid Block 1
Grid Block 2
5 Fuser
6 Printhead
Action
Be sure the mounting screws in the HVPS are
tight and the HVPS board is correctly seated
against the high voltage contacts of grid block 2.
Examine the contacts on grid blocks 1 and 2 for
signs of contamination or damage. grid block 1
supplies the necessary high voltages to the print
cartridges and ITM Unit, while grid block 2
supplies the high voltage to the ITM and
Transfer Roll.
Examine the HVPS board for signs of damage,
especially to the jumpers that contact the grid
block high voltage contacts.
Check the hot roll and backup roll for signs of
damage or heavy contamination.
• If a problem is found, repair or replace the
fuser assembly.
• If no problem is found, check the discharge
brush for buildup, replacing it if a problem is
found.
Dirt or dust on the lens or mirrors in the
printhead can cause this problem. After all other
checks have been made, replace the printhead
assembly.
Diagnostic Information
2-93