Hot Fuser Service Check; Lvps/Hvps Service Check - Lexmark X203n Servise Manual

7011-2xx / 3xx

Hot fuser service check

Note: Ensure correct fuser is installed.
FRU
Fuser AC cables
LVPS/HVPS
Fuser

LVPS/HVPS service check

FRU
LVPS/HVPS
2-28
Service Manual
Action
Measure the resistance of the thermistor. The resistance measures
from approximately 1K ohms immediately after printing or POR to
approximately 240K ohms when thermistor reaches room
temperature. (It may take 30 minutes to cool.)
Replace the fuser assembly as necessary.
Action
LVPS portion of board
Fuses that open typically indicate a faulty LVPS/HVPS.
Use the voltage meter to verify the appropriate voltage at the MFP
end of the power cable.
Remove the LVPS/HVPS assembly from the MFP.
Check continuity on the fuses.
If either fuse has opened, replace the card.
Ensure the switch is off, and plug the power cord into the card.
Turn the switch on.
CAUTIONThe card has several points where AC voltage is
exposed.
Carefully verify the AC voltage between pins 1 and 2 matches the
power cable (wall) voltage.
• If voltage is incorrect, replace the card assembly.
• Verify +24 V dc from pins 8 and 9 at CN201.
• If voltage is incorrect, replace the card assembly.
HVPS portion of board
Problems with the HVPS are exhibited in the print quality. See
quality service checks" on page 2-35
"Print
for more information.