Ricoh A250 Service Manual page 287

Rev. 12/99
SC122: Scanner Home Position Error 3
Definition: [B]
The scanner home position sensor detects the on condition while the scanner
returns to the home position.
Possible Causes:
• Scanner home position sensor defective
• Scanner drive motor defective
• Exposure lamp connector defective
• Scanner home position sensor connector defective
• Scanner drive motor connector defective
SC123: Scanner Home Position Error 4
Definition: [B]
The scanner home position sensor does not detect the on condition after the
scanner returns to the home position.
Possible Causes:
• Scanner home position sensor defective
• Scanner drive motor defective
• Scanner home position sensor connector defective
• Scanner drive motor connector defective
SC192: Automatic SBU Adjustment Error
Definition: [B]
An error is detected during automatic SBU adjustment (SP4-908).
Possible Causes:
• SBU defective
• BICU board defective
• Exposure lamp regulator defective
• Exposure lamp defective
• Dirty white plate
SC194: IPU White Level Detection Error
Definition: [B]
The level of the white standard pattern detected by the IPU (on the BICU
board) is too low.
Possible Causes:
• Exposure lamp defective
⇒
• BICU board defective
• Incorrect position of the white standard pattern
• Dirty white plate
• SBU board defective
SM
SERVICE CALL CONDITIONS
7-3 A250