The back side cleaning sensor (PS9) does not change from L to H even after the lapse of a given period of time after the home position detecting operation is started at the initial operation.The back side cleaning sensor (PS9) does not change from H to L even after the lapse of a given period of time after the home position detecting operation is started at the initial operation.Description: Opposed board home sensor abnormality (initial).The scanner home sensor detects the scanner at its home position during a period of time that begins with the time when a pre-scan command and a scan preparation command are executed and ends when a home return command is executed.5 PS201 I/O check, sensor check REYB/SCAN PJ3-5 (ON) P-17 6 M201 operation check REYB/SCAN PJ5-4 to 7 W-19 7 Change REYB/SCAN. 4 Check the PS201, M201, REYB/SCAN and MFPB connector for proper connection and correct as necessary. 2 Correct the scanner motor set screw if loose. Remedy: 1 Correct or change the scanner drive (cable, pulley, gear, belt) if it is faulty.Causes: Scanner home sensor (PS201) Scanner motor (M201) Scanner relay board (REYB/SCAN) MFP board (MFPB).The scanner home sensor detects the scanner when the scanner has moved the maximum travelling distance from the position, at which it blocks the scanner home sensor.The scanner home sensor is unable to detect a scanner even when the scanner motor has been driven to move the scanner over the maximum travelling distance.The scanner home sensor is unable to detect the scanner located at its home position.Description: Drive system home sensor malfunction.2 Check the cable connection between the machine and the ADF and correct if the connection is faulty. Remedy: 1 Check the type of the installed ADF and replace it if it is a wrong one.Causes: ADF CIS module (CIS) DS image processing board (DSIPB).The machine detects an ADF other than DF619.The machine detects an ADF other than DF618.
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