I have error in ricoh mp 1100 sc 672 after turn on 30 second and error sc 672 i had changed all the ram but it is not work any body can help

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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

https://www.copytechnet.com > forums > 126200-aficio...
Jan. 13, 2018 - SC 819 is a fatal kernel error. Either the controller and possibly other boards were blown by the power surge or the components you replaced on ...
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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 ...

sc 672 Controller-to-operation panel communication error at startup
Possible Causes
? Controller stalled
? Controller board installed incorrectly
? Controller board defective
? Operation panel connector loose or defective
? The controller is not completely shutdown when you turn the main
switch off.
Check the setting of SP5875-001. If the setting is set to "1 (OFF)", change it
to "0 (ON)".

SC 672 is a controller error. So possible is tat the controller board is defective, in best case can be only the ram memory dimm's or the HDD but in most cases the controller board is dead.

kindly change the hard drive board.
or call 0243494871 for more help and replacement of the part.

1. Go to this code with "Clear Mode"+107+"Clear/Stop" hold for 5s.
2. Go to System Settings
3. Go to 5875
4. Check the setting of SP5875-001. If the setting is set to "1 (OFF)",change it to "0 (OFF)".

Try checking or changing the thermistors!
The metal contact spring on the thermistor broken causing all sorts of 'unrelated errors including 'Please Wait' sc 670 and sc 402...

If the model ia a MPC 2800 it a controller board issue maybe the operation panel. -carl

sc982 is usually an error with the NV-RAM (non-volatile RAM). Have you recently replaced the NV-RAM? If so, it probably just isn't sitting right on the board.

Have you tried turning the machine off (with the main power switch) and turning it back on? If the error reappears, you likely have a problem with your NV-RAM and it will need to be replaced.

Sorry for the bad news, but hopefully this information will help.

remove all paper from the trays then turn machine off wait a few second then turn back on should reset then reload paper

Controller to operation panel comucation error at start up.Check the controller stall,controller board installed correctly operation panel connectors.Enter im the service menu ,press the SP mode,open the front door,turn off the copier,unplugged the machine.Wait 10 seconds,plugged on the machine,close the front door,turn ON the copier and make a copy.

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.