All codes
Service call
SC194
SBU white level too low
BScanner / optics
Level B — stop, power-cycle may clear
First check
Same cleaning path as SC142.
What it means
SBU white level too low. Confirm the exact subcode against the FSM for this serial — meaning can shift by generation.
Likely causes
- Same cleaning path as SC142.
On-site steps
Parts to have on the truck
- SBU
- Exposure lamp
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.