Ricoh Aficio 2090 Service Manual
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. Code: SC101. Description: Exposure Lamp Error The standard white level was not detected properly when scanning the white plate.
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Causes:. 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. Code: SC120. Description: Scanner Home Position Error 1 The scanner home position sensor does not detect the on condition during initialization or copying. Causes:. 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.
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Code: SC121. Description: Scanner Home Position Error 2 Scanner home position sensor OFF not detected. Causes:. 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. Code: SC124. Description: Encoder Signal Error The scanner motor encoder connector is not set correctly, or the encoder signal was not input. When the scanner motor encoder connector is not set correctly, or occasionally even if set correctly, this error is detected if there is no input 4 ms after scanning begins. Causes:.
Scanner motor encoder connector disconnected. Scanner motor lead connector disconnected. Scanner motor defective. MCU board defective (scanner motor control unit). Scanner wire, timing belt, pulleys, or carriage installation incorrect. Power supply connector disconnected (+38V ±12V). Power supply unit (PSU-E board) defective.
Code: SC125. Description: Scanner Motor Error 2 Scanner motor stopped before feedback from scanner HP sensor detected, or motor speed too slow when detected at scanner HP sensor. Causes:. Scanner motor defective (high torque).
Overload on scanner drive mechanism. MCU board defective (scanner motor unit control). Code: SC126. Description: Scanner Motor Error 3 The scanner motor does not stop within 15 mm after the scanner home position sensor turns on when the scanner returns. Causes:. Scanner motor defective (low torque). Overload on scanner drive mechanism.
MCU board defective (scanner motor control unit). Code: SC127. Description: Scanner Motor Error 4 The scanner motor rotates in the opposite direction to the signal from the MCU board. Causes:. Scanner motor defective (motor lead connected incorrectly). MCU board defective (scanner motor control unit). Code: SC128.
Description: Scanner Motor Error 5 The scanner motor speed does not reach the target speed by the time the scanning start point is reached. Causes:.
Scanner motor defective. Overload on scanner mechanism.
PSU-E board defective. MCU board defective (scanner motor control unit).