All codesService call
SC240
LD error (laser diode)
ALaser / write
Level A — stop, SP reset after repair
First check
Laser unit replacement. Never power the machine with the laser cover off.
What it means
Laser diode power is out of range — too high, too low, or not lighting. Do not stare into the laser unit.
Likely causes
- LD end of life
- LD driver
- LOSU
On-site steps
Parts to have on the truck
Confirm the subcode and part number in the FSM for this serial. Raicoh is a field companion, not a replacement for the book.