• Code: SC458
• Description: PTR pressure mechanism H.P. detection error • When the PTR pressure mechanism does not stop its H.P. after 15 seconds from the PTR lift motor starts to return to its H.P. • H.P. detection sensor does not on within 7 seconds after the PTR pressure movement starts. • H.P. detection sensor does not off within 7 seconds after the PTR pressure release starts.
• Causes: • Defective PTR lift motor • Defective H.P. sensor • Dirty H.P. sensor • Defective H.P. sensor feeler • Defective main control board
• Remedy: 1. Make sure that sensor harness is properly connected. 2. Clean the sensor, replace it if necessary. 3. If the sensor feeler is broken, replace it. 4. Replace the PTR lift motor. 5. Replace main control board.

• Code: SC495
• Description: Humidity sensor - temperature detection error - Timing & Condition - The humidity sensor’s temperature output is higher than 2.75V or less than 0.25V.
• Causes: • Poor connections • Defective humidity sensor • Defective I/O control board • Defective main control board
• Remedy: 1. Make sure that connectors CN210, 211 & CN302 are properly connected to the I/O control board and the main control board. 2. Replace the humidity sensor. 3. Replace the I/O control board. 4. Replace the main control board. [Signal Check] • Temperature: CN210-1, TP247, or CN211- A9 on the I/O control board/CN302-A1 or TP112 on the main control board

• Code: SC496
• Description: Humidity sensor - humidity detection error - Timing & Condition - The humidity sensor’s humidity output is higher than 2V or less than 0.125V.
• Causes: • Poor connections • Defective humidity sensor • Defective I/O control board • Defective main control board
• Remedy: 1. Make sure that connectors CN210, 211 & CN302 are properly connected to the I/O control board and the main control board. 2. Replace the humidity sensor. 3. Replace the I/O control board. 4. Replace the main control board. [Signal Check] • Humidity: CN201-4, TP236, or CN211-A8 on the I/O control board/CN302-A2 or TP113 on the main control board

• Code: SC500
• Description: Fusing motor error - Timing & Condition - • The feedback signal from the motor is still out of range 1 second after the trigger signal was sent. • The feedback signal goes out of range for 2 seconds while the trigger signal is ON.
• Causes: • Poor connections • Defective fusing motor • Defective I/O control board • Defective main control board
• Remedy: 1. Make sure that connector CN218 is properly connected to the I/O control board. 2. Replace the fusing motor. (Output check: SP 5-804-005) 3. Replace the I/O control board. 4. Replace the main control board. 5. Check for anything that might overload the fusing unit drive. [Signal Check] • Motor OK: CN218-7 or TP104 on the I/O control board

• Code: SC501
• Description: 1st paper tray error - Timing & Condition - • The upper limit sensor stays HIGH when the pick-up solenoid turns off. • The upper limit sensor stays LOW 1.5 seconds after the tray bottom plate begins to lower. • The upper limit sensor stays HIGH 10 seconds after the tray bottom plate starts to rise. • The upper limit sensor stays HIGH 3 seconds after the tray bottom plate starts to rise again.
• Causes: • Pick-up solenoid spring has come off • Defective upper limit sensor • Defective tray bottom plate • Defective tray lift motor • Defective I/O control board • Defective main control board
• Remedy: 1. See if the spring of pick-up solenoid has come off. 2. Make sure the sensor harness is properly connected. 3. Clean the sensor, replace it if necessary (Input Check: SP5-803-014 to 017). 4. If the tray bottom lever is broken, replace it. 5. Pull out the paper tray and make sure the tray lift motor works properly (Output Check: SP5-804-75 to 82) 6. Replace the I/O control board. 7. Replace the main control board. [Signal Check] • Limit sensor H.P.: CN224-A8 or TP215 on the I/O control board

• Code: SC503
• Description: 3nd paper tray error - Timing & Condition - • The upper limit sensor stays HIGH when the pick-up solenoid turns off. • The upper limit sensor stays LOW 1.5 seconds after the tray bottom plate begins to lower. • The upper limit sensor stays HIGH 10 seconds after the tray bottom plate starts to rise. • The upper limit sensor stays HIGH 3 seconds after the tray bottom plate starts to rise again
• Causes: • Pick-up solenoid spring has come off • Defective upper limit sensor • Defective tray bottom plate • Defective tray lift motor • Defective I/O control board • Defective main control board
• Remedy: 1. See if the spring of pick-up solenoid has come off. 2. Make sure the sensor harness is properly connected. 3. Clean the sensor, replace it if necessary (Input Check: SP5-803-014 to 017). 4. If the tray bottom lever is broken, replace it. 5. Pull out the paper tray and make sure the tray lift motor works properly (Output Check: SP5-804-75 to 82) 6. Replace the I/O control board. 7. Replace the main control board. [Signal Check] • Limit sensor H.P.: CN226-A8 or TP282 on the I/O control board

• Code: SC504
• Description: - Timing & Condition - • The upper limit sensor stays HIGH when the pick-up solenoid turns off. • The upper limit sensor stays LOW 1.5 seconds after the tray bottom plate begins to lower. • The upper limit sensor stays HIGH 10 seconds after the tray bottom plate starts to rise. • The upper limit sensor stays HIGH 3 seconds after the tray bottom plate starts to rise again
• Causes: • Pick-up solenoid spring has come off • Defective upper limit sensor • Defective tray bottom plate • Defective tray lift motor • Defective I/O control board • Defective main control board
• Remedy: 1. See if the spring of pick-up solenoid has come off. 2. Make sure the sensor harness is properly connected. 3. Clean the sensor, replace it if necessary (Input Check: SP5-803-014 to 017). 4. If the tray bottom lever is broken, replace it. 5. Pull out the paper tray and make sure the tray lift motor works properly (Output Check: SP5-804-75 to 82) 6. Replace the I/O control board. 7. Replace the main control board. [Signal Check] • Limit sensor H.P.: CN226-B8 or TP280 on the I/O control board

• Code: SC505
• Description: LCT: Upper limit detection error - Timing & Condition - While the paper tray is being lifted, the upper limit sensor does not activate within 2.5 seconds after the paper end sensor activates.
• Causes: • Poor connections • Defective paper end sensor • Paper is not properly loaded in the LCT • Paper is curled
• Remedy: 1. Open the LCT cover and reload the paper properly. 2. Make sure the paper end sensor is properly connected. 3. Replace the paper end sensor.