Causes: LSU Motor does not work normally or LSU H Sync signal is abnormal.
Remedy: 1) Execute the LSU motor test in SVC mode. Check LSU motor operation sound. 2) If there is no sound, remove the right cover. Check if the LSU harness is connected on the main board properly. 3) If it is OK, remove the top cover. Check if the LSU harness is connected on LSU board properly. 4) Check if the LSU harness is defective. 5) Reconnect the LSU harness and then execute the LSU motor test again. 6) If the problem persists, replace the LSU. 7) If the problem persists after replacing LSU, replace the main board.
Code: U3-3313, U3-3314, U3-3413
Description: Original paper jam
Causes: A document jam was detected in the ADF unit.
Remedy: 1) Remove the jammed paper from ADF unit. 2) If the error persists, turn the machine off then on. 3) If the document jam occurs continually, open the ADF cover-top. Check if the ADF pick up roller is contaminated or worn out. Clean or replace it. 4) If the pick up roller is OK, check the followings. a) Check if the ADF motor is working normally. b) Check if the connector on the ADF joint board is connected correctly. 5) If the problem persists, replace the ADF unit.
Code: U3-3513, U3-3514
Description: Original paper jam
Causes: A document jam was detected in the ADF unit.
Remedy: 1) Remove the jammed paper from ADF unit. 2) If the error persists, turn the machine off then on. 3) If the document jam occurs continually, open the ADF cover-top. Check if the ADF pick up roller is contaminated or worn out. Clean or replace it. 4) If the pick up roller is OK, check the followings. a) Check if the ADF motor is working normally. b) Check if the connector on the ADF joint board is connected correctly. 5) If the problem persists, replace the ADF unit.