Ricoh SP300DN Printer. Hi sir, my printer has red alert light error? How to fix please?

it is very important to be known which printer model, because the explanation of how to fix it very differs from model to model, so please write the specific Ricoh printer model please..

How can I clear error sc 20000 0n richo ipsio sg 7100 printer
WHEN i PUT PRINTER ON RED ALERT LIGHT ON ERROR sc 20000 WHAT CAN i DO

Paper transfer unit contact error

The paper transfer unit contact sensor does not detect the movement of actuator at the sensor while the polygon motor rotates.

?? Defective paper transfer unit contact sensor
?? Defective paper transfer unit contact motor

1. Check or replace the harness.

2. Replace the image transfer belt unit or paper transfer unit.
3. Replace the HVPS-TTS board.

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.

Enter service mode (hold the up and down keys for 6 seconds release and push the #) and Sp 5-810 resets the code. the problem root is fuser. -Carl

Try to shutdown, wait about 20 sec, then restart the printer.
.

Red light all time when ink is finished and refilled it.

You need to download SOM smart organizing monitor from ricoh website. you will see the error or error code.

You can install the SOM (Smart Organizing Monitor), it is a utility which can check the status of a printer and set up a printer
from a PC. This utility is executed from a printer driver.

Start the SOM to see the status of your printer..

I need an answer to the same problem