Hi there, it is a fuser unit temperature problem, reset pressing yellow button, 1 0 7, then hold red/orange button for at least 5 seconds until screen changes, then select "copy" or "system", then type 5 810 #, on the screen select "execute" and if it ask to confirm then select "yes", switch off and on. If the problem comes back then clean fuser thermistors and reset again.
SOURCE: code error sc543 ricoh aficio
SC-543
Heating roller fusing lamp overheat
The detected fusing temperature stays at 200 °C or more for five seconds.
Replacetment the PSU.
Got it here: http://www.websitetoolbox.com/mb/copierquestions
SOURCE: Gestetner 3218 Aficio 180 Fuctional Problem SC 543
Enter SP mode - Clear button (yellow key), 1 0 7 and hold and press stop button (orange key).
Enter SP5-810 (SC code reset) and select “1”.
Then hold down the “Photo mode” key and the enter key(hash) at the same time for at least 3 seconds (it is not necessary to turn the main switch off andon). If the machine beeps 5 times, the reset was successful. If it only beeps twice, the reset failed, and you need to repair the machine.
Possible causes are the fusing thermistor in the fuser unit, or the power supply unit defective.
Good luck and please rate me, thanks.
SOURCE: Ricoh aficio 1232c error code sc 543
This is a fuser problem,possibly a dirty thermistor, but try resetting it first.....
Press yellow key
key in 1,0,7
then press and KEEP HELD DOWN the orange key until the screen alters into service mode. (about 5 seconds)
Then switch off the copier with the main orange on/off switch. Located just below the front cover....
SOURCE: the wrench icon is on and code SC543-00 show up in the screen
That code indicates a fuser overheat error or hot roller fusing lamp overheat. Refer to your manual if you have it. Good luck.
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