Taken from the SP320DN service manual:
SOURCE: Ricoh Aficio SP 420dn shows SC545 error code after
As NALDZ said, sometimes when the power drops out the thermistor will play up a little. Sometimes this can be caused by toner being caked up on the thermistor. But in most cases it can be reset easy enough.
if you walk up to the machine in COPY mode.
simply press.
(yellow clear), 1 , 0 , 7 (hold red stop button)
The screen will change, if you hold '#' on the keypad and press 'copy sp' on the touch screen you will be into ricoh service modes.
All you will have to do now to reset your error is simply switch the machine off at the main red switch below the plastic flap toward the bottom of the machine.
problem solved =]
ta!
Willi
Service Engineer
SOURCE: Ricoh SP C811DN error sc549
unplug printer, wait minute, plug in, should reset.
check Ricoh website to trouble shoot if does not reset.
SOURCE: SC550 Error. Ricoh MP
That error code refers to the FUSING WEB END.
First of all you must see if the fusing web is end.
If the error occurs before the web ended you have to upgrade your firmware. There is a release firmware that corrects this symptom.
SOURCE: error sc543 sp c320dn
SC542, SC543, SC544,
SC546,
These codes are related to fuser temperature. Make sure that
power source voltage are not low. check thermisters, fusing lamps etc. To reset
this code press "All clear" yellow key, enter 107 and press the red key for some
seconds. Sevice mode will be displayed, enter SP 5-810 (SC code reset) and
select "1". Then hold down the Photo mode key and the # key at the same time for
at least 3 seconds
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