131 Error Code - Lexmark C750 Service Manual

131 Error code

The fuser backup roll does not reach the correct standby temperature.
Step Action and questions
1 Measure the voltage on connector J10-12 on the
engine board. See
the location of the connector. The voltage should
measure approximately +0.13 V dc to 0.64 V dc as the
backup roll lamp turns on and off.
Is the voltage correct?
2 Remove the fuser from the printer. Check the continuity
of the backup roll lamp by measuring between pins 2
and 5 on the AC fuser connector on the fuser
assembly.
Is there continuity?
3 Check to make sure the backup roll lamp is installed
correctly.
Is the lamp installed correctly?
4 Carefully remove the lamp from the fuser assembly,
being careful to only handle the lamp by the ceramic
end pieces and not by the glass envelope.
Warning: Use caution when handling the lamp as it is
easily broken.
Check the continuity of the backup roll lamp.
Is there continuity?
5 Reinstall the fuser assembly. Watch to see if the lamps
turn on and off as the lamps heat up.
Do the lamps turn on and off?
Turn the printer on and allow it to reach Ready.
6
Note: The printer may not complete POR and
continues to display a 131 error.
Remove the fuser assembly from the printer and
measure the voltage on connector J10-7 on the engine
board. The voltage should measure approximately
+3.3 V dc.
Is the voltage correct?
"Engine board" on page 5-7
Yes
Replace the fuser
for assembly. See
"Fuser assembly
removal" on
page 4-31.
Go to step 5
Go to step 4
Replace the fuser
assembly. See
"Fuser assembly
removal" on
page 4-31.
Go to step 6
Go to step 7
Diagnostic information
5060-00x
No
Go to step 2
Go to step 3
Install the lamp
correctly.
Replace the
backup roll lamp.
Replace the LVPS
assembly. See
"Low voltage
power supply
(LVPS) removal"
on page 4-38.
Replace the engine
board assembly.
See "Engine
board removal"
on page 4-29.
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