TROUBLESHOOTING ERROR CODE SC320

replace laser polygon motor or laser unit

clean laser unit OR replace it

SC320 is a Polygon Mirror Motor Error/Lock

The SC 320 is the polygon motor error code.

i have a ricoh aficio 450 copier.it pick the paper from the tray and after afew seconds the paper will come without coping.(plain paper)

I am assuming you really meant an Aficio 1013 - SC320 indicates a polygonal mirror motor failure. This motor drives the mirror that distributes the laser to the drum. Could be a defective motor, poor connection between the motor and the BICU - one of the motherboards, damaged cable or defective BICU.

This will require a service call. Probably looking at an hour to diagnose the exact problem and an hour or two to repair plus parts. Could be as simple as a loose connector --- doubtful, but you never know.

That is a "Laser motor" Error - Laser motor is dead, and needs replacement

Is this actually a Ricoh Aficio 1013F, or another model, because "CH551" is not a ricoh service code?Do you mean "SC551"
If so, this is a fuser "triac" problem (basically a fuse in the heater unit). It can only be reset in service mode after the problem is fixed...and will require a tech.

Change the polygonal motor of the laser.

Hi it is the polygon motor failure error

2nd motor down on this link is what you need.