The "secret" code is: Clear (yellow button), 1, 0, 7, hold down the C/ button until menu displays. COPY SP Select option 5 #810# +START from the screen display.EXECUTE
Turn off machine, wait 10 sec, turn on machine.
SC541, Sc545
Push clear modes (yellow) button Numbers 1-0-7 hold down clear stop(Red). That will get you in service mode then turn off then on.
Try cleaning the thermistors of any hardend toner that may be stuck on them.
any way its...
Clear Modes button
1 - 0 - 7
press hold Clear / Stop Button until menu display.
press Copy Mode on the Touch Screen Panel. copy Sp .. 5810# EXECUTE
then turn Off/ On the Machine...
but i suggest that you must replace the center thermistor...
A couple of guys in here say thermistors but there was a service bulletin on this machine regarding the thermostats and updated part numbers. The new part numbers are:
AW110066 and AW110064
And if the 545 code keeps comming back after you reset one of the thermostats is open.
Sc 54X codes are normally associated to heat problems/sensor problems in the fusing units.
I personally don't give customers the information to reset these codes,
I go to visit the machine myself and check the fuser over. Although I do normally
try resetting the code first, if it seems to solve the problem I check the fuser over anyway,
just to ensure it won't come back. Works half the time, other times the entire fuser
is over-life, and end up replacing the Hot Roller, Pressure roller etc.
I'd call a Technician in anyway, just to double check.