Ricoh B234 - Page 433

SERVICE CALL CONDITIONS
SM 4-13 B234/B235/B236/D101/D102/D103
Trouble-
shooting
4.2.4 SC CODE DESCRIPTIONS
Exposure Lamp Error
SC101 B
The standard white level was not
detected properly when
scanning the white plate.
• Exposure lamp defective
• Lamp stabilizer defective
• Exposure lamp connector defective
• Scanner motor control unit (MCU board)
defective
• SBU board defective
• Dirty standard white plate
• Dirty scanner mirror or scanner mirror or
lens block out of position
Scanner Home Position Error 1
SC120 B
The scanner home position
sensor does not detect the OFF
condition during initialization or
copying
• Scanner home position sensor defective
• Poor connection between HP sensor and
MCU board
• Scanner motor control unit (MCU board)
defective
• Scanner wire, timing belt, pulleys, or
carriage out of position
• Scanner motor defective
• Poor connection or defective harness
between MCU board and scanner motor
Scanner Home Position Error 2
SC121 B
Scanner home position sensor
does not detect ON.
• Scanner home position sensor defective
• Poor connection between MCU board
and scanner home position sensor
• Harness between MCU board and
sensor defective
• MCU board defective
• Scanner wire, timing belt, pulleys, or
carriage out of position
• Scanner drive motor defective
• Harness between MCU board and
scanner motor disconnected