Causes: No change in the paper transport motor rotation sensor signal is detected within the specified time after outputting the paper transport motor ON signal. The paper transport motor rotation sensor signal varies though the paper transport motor is stopped. Paper transport motor rotation sensor trouble. LCC control PWB trouble. Mechanism trouble. Paper transport motor trouble. Connection trouble of the connector and the harness.
Remedy: Use SIM4-3 to check the operation of the paper transport motor. Replace the paper transport motor. Replace the LCC control PWB. Replace the mechanism. Replace the paper transport motor. Check connection of the connector and the harness.
Code: U6-22
Description: LCC 24V power trouble
Causes: The DC24V power is not supplied from the main unit to the LCC. Connector, harness connection trouble. LCC control PWB trouble. Power source unit trouble.
Remedy: Check the connector and the harness in the power line. Replace the power unit. Replace the LCC control PWB.
Code: U6-50
Description: Desk - Main unit combination trouble
Causes: Improper combination between the main unit and the desk. Desk control PWB trouble.
Remedy: Install a desk which is proper for the main unit mode. Replace the desk control PWB.
Code: U6-51
Description: LCC - Main unit combination trouble
Causes: Improper combination between the main unit and the LCC. LCC control PWB trouble.
Remedy: Install a LCC which is proper for the main unit mode. Replace the LCC control PWB.
Code: U7-50
Description: MFP PWB - Vendor machine communication error Communication error between the MFP and the serial vendor.
Remedy: Cancel the error by turning OFF/ON the power. Check the connector and the harness in the communication line. Change the specifications of the vendor machine (SIM26-3). Replace the LCC control PWB. Replace the MFP PWB.
Code: U7-51
Description: Vendor machine error MFP (Notification of a trouble from the serial vendor)
Causes: Serial vendor machine trouble. Connector, harness connection trouble.
Remedy: Err.XX" is displayed on the operation panel of the vendor. (XX is the detail code.) Repair the vendor machine referring to the detail code. Check the connector and the harness in the communication line.