920, 922, 923-Fuser Unit Service Check - Lexmark C720 Service Manual

5024-001
920, 922, 923—Fuser Unit Service Check
FRU
1 Fuser Unit
2 • Fuser Low Voltage
Power Supply (LVPS)
• Main Engine (MCTL
P.W.B.) Board
2-54
Service Manual
Action
Check for dirt or any damage to the fuser
unit and replace, if necessary.
Turn the machine on and determine
whether the fuser heater is On.
If the heater lamp is On, check for the
correct input line voltage.
If the line voltage is correct and the error
still exists, replace the fuser unit.
Note: The fuser unit is a customer order
supply.
Turn the machine On and determine
whether the fuser is On.
If the heater lamp is Off, check the
following:
• Ensure the fuser is installed properly.
• Ensure the fuser connector is not
damaged and replace, if necessary.
If the problem still exists, replace the
following parts in the order given until the
error is cleared.
• Fuser unit
Note: The fuser unit is a customer order
supply.
• Low voltage power supply (LVPS)
• Main engine (MCTL P.W.B.) board