Ricoh afico 811 error sc689 and sc547 - Ricoh Aficio SP C811DN-DL Printer

Error code SC547-00 on a Ricoh printer typically indicates a problem with the fusing unit. Check for any loose or damaged connections and make sure the fusing unit is properly seated. If the error persists, you may need to replace the fusing unit.

1. Check the power supply source.
2. Replace the +24V fuse on the PSU.
3. Replace the PSU

TD sensor error

Fixing problem. You have a bad thermistor. This detects heat in the fixing assembly. There are two . Replace both.

sc 547 mean fixing unit error ,you can reset by simply getting into simulation mode and then switch off an the machine ,getting into the simulation mode is simply by pressing 107 and press and hold c ,

The error sc 547 refers to a "Zero cross signal malfunction".

This means that the applied power supply AC frequency was detected at over 66Hz or below 45Hz, and the zero cross signals are not detected within a certain period within 500 ms after the main power switch has been turned on.

Possible causes are:
- Power supply board defective
- IOCSS defective
- BICU defective

Try to reset the SC code by entering SP5810 and select 1.
Then hold down the photo mode key and the # key at the same time for at least 3 second.
Then turn the machine off and on again.
If the same issue still appears, try to replace the Power Supply Unit.

there may be a problem with your electric supply(wall outlet) , wrong voltage or power supply bad

Press total clear (yellow key) , 107 and press and hold the clear stop key (orange key) more than 3 seconds, shut off and on the copy.
Good luck.

· Hot roller fusing
lamp brown
· Hot roller
thermofuse opened
· Defective main
control board
· Defective I/O
control board
· Defective AC drive
board

more than likely the thermofuse.

Must have unplugged the thermister on the coupling connection bank. Reset fuser: Clear modes/ 107/ press and hold clear/stop. Pick copy sp. select mode. exit out of all screens and cycle power.