Ricoh Lily Service Manual page 432

SERVICE CALL CONDITIONS
SC623: Communication error between main control board and projector
unit
- Definition - [B]
The main CPU cannot start communication with the projector unit
properly.
- Possible causes -
•
Poor connection between main control board and projector unit
•
Main control board defective
•
Option interface board defective
•
Projector control board defective
6-24
10 May 1996