WHY RICOH AFICIO MP 171 SPF IS SHOWING SERVICE CALL SC 542.

Question edited for a lot more clarity, including FULL make and model.
Question moved to model category.

https://www.google.com/search?q=ricoh+aficio+mp+171+factory+reset

North American website, we speak English :>)

I have a ricoh mp c5501 which displays sc819

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The answer is NOT good!

AFICIO MP C551 SC 819 ( 5348 0x5554444F ) - Copytechnet

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SOLVED: What is sc819 for ricoh aficio c4501 - Fixya

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Sep. 1, 2019 - Yeah most likely the Hard Drive, just replace them with off the shelf ones. Could also be the dimms, controller, nvram or firmware. I would unplug the HDD first ...
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Ricoh Aficio 480W - SC819 - PrintCopy .info

https://printcopy.info > brand=Ricoh > code=SC819
Ricoh Aficio 480W · Code: SC819 · Description: Fatal kernel error. Due to a control error, a RAM overflow occurred during system processing. One of the following ...

https://printcopy.info/index.php?mod=erc&brand=Ricoh&model=MP171&code=542

exhaust fan is not working. replace

mp 171 has no waste toner container. it recalculates toner back to developer section.

because in some moment the fusing temperature was more high than the optimal. maybe it is just because of precaution issued the SC542. or maybe is problem . you need to reset the SC542 by entering the service mode. for this if you call service they will charge you big money. so if it is just issued just as precaution by doing the following procedure the machine will work fine again. but if the code do not clear do not repeat the procedure more than ones that you can make bigger damage that it has have before the code. so follow the next procedure: first enter service menu by pressing the following keys in order. press the yellow clear key the pres 107 and then press the red clear/stop key until on he screen write service menu or something other than the usual screen. after that appear. turn the machine of by the left side switch and wait 5 seconds, than turn it in again. if starts to work everything is okey . if the SC542 appear again do not repeat the procedure. call a serice techician

Ok please open

FOR RICOH AFICIO SP 3400SF follow below steps.

1. To access Service Mode, On Control Panel press following buttons one
by one immediately.

Cancel Button (Red) ---> 1 (Numeric One) ---> 0 (Numeric zero) ---> 7
(Numeric Seven) ---> Copy Button (Green)

2. In Service Menu you will find Engine reset Menu. In that you can reset
SC 545 in Fuser Reset Menu. And you can also reset SC 542.

SC542 is a warm up error from the fuser.

SC 870 is an address book error.

Turn the power off on the copier. Wait 30 seconds and then turn the power back on. See if it goes away.

Let me know if it doesn't.