All codes
Service call
SC183
CIS auto adjustment error
BScanner / optics
Level B — stop, power-cycle may clear
First check
Clean the CIS glass and white reference, then replace CIS.
What it means
CIS shading/auto-adjust failed.
Likely causes
- Dirty CIS
- CIS unit
On-site steps
Parts to have on the truck
- CIS unit
Related codes
Confirm the subcode and part number in the FSM for this serial. Raicoh is a field companion, not a replacement for the book.