Ricoh aficio 1055 error sc 126

[JERRY D]

I have just replaced the Polygon Mirror Motor and all went fine. A couple weeks later it started with this error. I can't relate the two issues other than checking the connections. It homes the scanner at power up but is likely returning home too fast after a scan, thereby passing the home position sensor. One of the possible solutions mentioned in the service manual is "Too small load on scanner drive". How do I determine this and/or correct it? Any other possibilities you know of. Thanks.

[Fearless V K]

The set screw on the scanner pulley commonly breaks or backs out on these and can cause scanner errors or the scanner slamming home.

[salmandol]

you can also check the tension on scanner drive belt