Diagnostic Information
2-83
5060-XXX
Error Code 127
Backup Roll Thermistor or thermistor circuits are open.
Hot Fuser Service Check
Error codes 124, 125, 134, and 135 display whenever the printer detects a problem with
the fuser running over temperature or the fuser lamps have been on too long.
Error Code 124
Error Code 134
Error codes 124 and 134 indicate that the fuser is running over temperature or the hot roll
fuser lamp has been on too long.
These error codes indicate that a problem could exist in the fuser assembly with the hot
roll bearings, hot roll thermistor or other hot roll parts. The LVPS or engine board
assembly can also be failing.
2
Voltage Check - Measure the voltage on J10-6. Go to
“Engine Board” on page 5-1
. The voltage will vary as the
lamp turns off and on between approxi1.5 V dc to
1.8 V dc.
Is the voltage correct?
Find the
correct system
problem or
error code
Replace the
following
FRU's in
order:
1.
“LVPS” on
page 4-14
2.
“Engine
Board” on
page 4-13
Step
Action and Questions
Yes
No
1
Thermistor Resistance Check, Back Up Roll - The
thermistor resistance can be checked between pins 7and 8
on the ten pin fuser control connector on the fuser
assembly. Go to
“LVPS Fuser Connectors” on page 5-20
.
Measure the resistance of the back up 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?
Go to step 2
Replace the
“Fuser” on
page 4-15
2
Voltage Check - Measure the voltage on J10-6. Go to
“Engine Board” on page 5-1
. The voltage will vary as the
lamp turns off and on between approxi1.5 V dc to
1.8 V dc.
Is the voltage correct?
Find the
correct system
problem or
error code
Replace the
following
FRU's in
order:
1.
“LVPS” on
page 4-14
2.
“Engine
Board” on
page 4-13
Step
Action and Questions
Yes
No
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