Lexmark 13P0150 - C 750dtn Color Laser Printer Service Manual page 102

Error Code 132 - Cold Hot Roll
Error Code 133 - Cold Backup Roll
Step Action and Questions
1
Lamp continuity Check, Hot Roll - Check continuity of the
hot roll lamp. The continuity can be checked by measuring
between pin 1 and pin 5 on the single line AC fuser
connector located on the bottom of the fuser frame. Go to
"LVPS Fuser Connectors" on page
Is there continuity?
2
Hot Roll Lamp incorrectly installed or damaged - It is easier
to check the lamp by removing it from the right side of the
fuser frame assembly. Check to make sure the lamp is not
broken, cracked or open.
Is there a problem with the lamp or its installation?
3
Lamp continuity Check, Back Up Roll - Check continuity of
the back up roll lamp. The continuity can be check by
measuring between pin 1 and pin 4 on the single line AC
fuser connector located on the bottom of the fuser frame.
Go to "LVPS Fuser Connectors" on page
Is there continuity?
4
Back Up Roll Lamp incorrectly installed or damaged - It is
easier to check the lamp by removing it from the right side
of the fuser frame assembly. Check to make sure the lamp
is not broken, cracked or open.
Is there a problem with the lamp or its installation?
Error Code 126
Hot Roll Thermistor or thermistor circuits are open.
Step Action and Questions
1
Thermistor Resistance Check, Hot Roll - The thermistor
resistance can be checked between pins 6 and 8 on the ten
pin fuser control connector on the fuser assembly. Go to
"LVPS Fuser Connectors" on page
resistance of the hot roll thermistor assembly. The
resistance measures as follows:
Thermistor Hot: approximately 4.0K ohms
Thermistor Cold: Approximately 256K ohms
Note: The resistance will vary between 4k and 256k ohms
depending on the temperature of the thermistor.
Is the resistance correct?
2-82
Service Manual
5060-XXX
5-20.
5-20.
5-20. Measure the
Yes No
Replace the Go to step 2
"Fuser" on
page 4-15
Reinstall the Replace the
lamp. Replace "Fuser" on
as necessary. page 4-15
Replace the Go to step 4
"LVPS" on
page 4-14
Reinstall the Replace the
lamp. Replace "Fuser" on
as necessary. page 4-15
Yes No
Go to step 2 Replace the
"Fuser" on
page 4-15