Error code = 07143

V-SYNC sensor error 2 when sub-scan When Sub-scan Feeding Motor completes feed a plate for scanning: " V-SYNC Sensor is ON. (There is a plate.) " Tray Sensor is OFF. (tray ejection) 1. Check detector of V-SYNC assembly. - Confirm that spring is intact. - Confirm that there is no deformation. - Confirm that the plate moves smoothly. 2. Check feeding path. - Confirm that there is a foreign object on feeding path. - Confirm that there is no protrusion on feeding guide. - Confirm that there is a foreign object on the roller. - Confirm that roller has any condensation. 3. Check cassette and plate. - Confirm that nonwoven fabric inside cassette is intact. - Confirm that there is any deformation/damage to plate slot. - Confirm that there is any damage to plate. 4. Use the service tool to check if Loading/Feeding Motor and Magnetic Clutch are working. Check the motor to see if it operates normally in both directions. If the motor runs fine, check belt tension. If the motor does not run normally, take the following steps and replace parts as required: - Confirm that all connectors are secure. Confirm that Loading/Feeding Motor (JP4)-(MCN4) is working. Confirm that Magnetic Clutch (JP9)-(MCN4) is working. - Confirm that all wires are firmly connected. - Replace motor/magnetic clutch. 5. Reinstall upper door.(Feeding guide may be out of alignment.) 6. Use the service tool to check if Sub-scan Feeding Motor, VSYNC Sensor and Tray Sensor are working. If not, take the following steps for the malfunctioning motor or sensor and replace parts as required: - Confirm that all connectors are secure. Confirm that Sub-scan Feeding Motor (JP6)- (JP7-1)(JP7-2)-(MCN4) is working. Confirm that the V-SYNC Sensor (JP32)-(JP31-1) (JP31-2)-(JP36-1)(JP36-2)-(MCN5) is working. Confirm that the Tray Sensor (JP26)-(JP28-1)(JP28-2)- (JP30-1)(JP30-2)-(MCN6) is working. - Confirm that all wires are firmly connected. - Replace the motor/sensor. 7. Change the main board. do you have instructions on how to use the service tool? how to run it?