Lexmark Optra Color 1200, Service Manual

Page: 66 / 245

Diagnostic Information
2-27
5050-001
Service Checks
Fuser Service Check
When you work on the fuser be sure to reposition it to the original
mounting position. Also be sure the exit sensor and FUD sensors
are not damaged when you replace the fuser.
FRU Action
1 • Fuser
Heater
• Fuser
Thermostat
• Fuser
Thermal
Fuse
The fuser may not be fusing correctly or not fusing
at all.
Disconnect the fuser heater cable CN602 from the
power supply. Check for continuity of the heater
(11G0348 115 V, 11G0549 230 V), thermostat
(11G0349), and thermal fuse. The thermostat must
equal 240K Ohms at 25 degrees C (room
temperature).
Replace the failing part.
2 Power Supply With the paper exit cover interlock activated, check
for approximately 120 V or approximately 240 V on
connector CN602 pin 1 and 2.
3 • Fuser
Thermistor
• Printer
Controller
Board
Be sure connector CN119 is securely pugged into
the printer controller board.
If the problem remains, unplug connector CN119
and short pins 1 and 2 on the connector together
with the power on. If an error code displays, replace
the printer controller board. If no error displays,
replace the Thermistor (11G0353).
4 Springs Be sure the two large springs that hold the fuser
rollers together are securely in place.
5 • Fuser Roll
• Press Roller Be sure the fuser roll and the press roller are not
dirty or damaged. Replace as necessary.
6 • Separation
Pawl
• Detach
Fingers
Be sure the detach fingers are not dirty, damaged,
or out of position. Replace as necessary.
7 Fuser position Be sure the fuser mounting guides are adjusted for
proper paper exit tracking. Replace as necessary.