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4. Alignment and Troubleshooting4.2.2 Error Message and TroubleshootingMessages appear on the Smart Panel program window or on the control panel to indicate machine status orerrors. Refer to the tables below to correct the problem.Error CodeError MessageTroubleshootingPageA1-1110Actuator Motor Failure #A1-1110: Turn off then on.4-40 PageA1-1210Actuator Motor Failure #A1-1210: Turn off then on.4-42 PageA1-1310Actuator Motor Failure #A1-1310: Turn off then on.4-44 PageA1-3110Actuator Motor Failure #A1-3110: Turn off then on.4-46 PageA2-1910Actuator Fan Failure: #A2-1910. Turn off then on.4-48 PageA2-1920Actuator Fan Failure: #A2-1920. Turn off then on4-49 PageA2-2410Actuator Fan Failure: #A2-2410.4-50 PageA3-2110Actuator Sensor Failure: #A3-2110.4-51 PageA3-5110Actuator Sensor Failure: #A3-5110.4-51 PageC1-1110C1-1110 Prepare new toner cartridge.4-52 PageC1-1120C1-1120 Replace with new toner cartridge4-52 PageC1-1140C1-1140 Replace with new toner cartridge4-52 PageC1-1311Toner Failure: #C1-1311: Install toner again4-53 PageC1-1330C1-1411Toner Failure: #C1-1330: Install toner againToner cartridge is not installed. Install it4-54 PageC1-1412Did not supply enough toner. Reinstall it4-53 PageC1-1413Shake toner cartridge and then install.4-53 PageC1-1512Toner cartridge is not compatible. Check guide4-54 PageC3-1110Prepare new imaging unit4-55 PageC3-1120C3-1140Replace with new imaging unitReplace with new imaging unit4-55 PageC3-1312Imaging Unit Failure #C3-1312: Install IMG. unit.4-53 PageC3-1315Imaging Unit Failure #C3-1315: Install IMG. unit.4-53 PageC3-1320C3-1330C3-1411C3-1412Imaging Unit Failure #C3-1320: Install IMG. unit.Imaging Unit Failure #C3-1330: Install IMG. unit.Imaging unit is not installed. Install the unit.Did not supply enough toner. Reinstall Toner4-55 pageC3-1512C3-1514Imaging unit is not compatible. Check guideImaging unit is not compatible. Check guide4-56 PageC5-1510Imaging Unit Failure #C3-1330: Turn off then on.4-56 PageC6-1110C6-1120Replace with new fuser unitReplace with new fuser unit4-57 PageC7-1110C7-1120Waste toner container is almost full. Replace with new oneWaste toner container is almost full. Replace with new one4-57 PageC7-1310Install waste toner container.4-57 PageService ManualML-551x / 651x series4-36Samsung Electronics

4. Alignment and TroubleshootingError CodeError 1510Paper Jam in Tray2Paper Jam in Tray3Paper Jam in Tray4Paper Jam in Tray54-58 PageH1-1222H1-1322H1-1422H1-1522Tray 2 cassette is pulled out. Insert it properly.Tray 3 cassette is pulled out. Insert it properly.Tray 4 cassette is pulled out. Insert it properly.Tray 5 cassette is pulled out. Insert it properly.4-59 PageInput System Failure #H1-1230:Check Tray 2 connection.Input System Failure #H1-1233:Check Tray 2 connection.Input System Failure #H1-1330:Check Tray 3 connection.Input System Failure #H1-1333:Check Tray 3 connection.Input System Failure #H1-1430:Check Tray 4 connection.Input System Failure #H1-1433:Check Tray 4 connection.Input System Failure #H1-1530:Check Tray 5 connection.Input System Failure #H1-1533:Check Tray 5 connection.Input System Failure #H1-2230:Check HCF 2 connection.Input System Failure #H1-2233:Check HCF 2 connection.Input System Failure #H1-2330:Check HCF 3 connection.Input System Failure #H1-2333:Check HCF 3 connection.Input System Failure #H1-2430:Check HCF 4 connection.Input System Failure #H1-2433:Check HCF 4 connection.4-60 pageH1-1252H1-1352H1-1452H1-1552Paper Empty in Tray 2Paper Empty in Tray 3Paper Empty in Tray 4Paper Empty in Tray 54-61 PageH1-1253H1-1353H1-1453H1-1553Error: #H1-1253Error: #H1-1353Error: #H1-1453Error: #H1-15534-62 PageH1-2210H1-2310H1-2410Paper Jam in HCF2Paper Jam in HCF3Paper Jam in HCF44-63 PageH1-2222H1-2322H1-2422HCF 2 cassette OutHCF 3 cassette OutHCF 4 cassette Out4-64 PageH1-2252H1-2352H1-2452Paper Empty in HCF 2Paper Empty in HCF 3Paper Empty in HCF 44-65 PageH1-2253H1-2353H1-2453Error: #H1-2253Error: #H1-2353Error: #H1-24534-66 PageH2-1100Paper jam inside of finisher. Remove paper4-67 PageH1-1230 (Tray2)H1-1233 (Tray2)H1-1330 (Tray3)H1-1333 (Tray3)H1-1430 (Tray4)H1-1433 (Tray4)H1-1530 (Tray5)H1-1533 (Tray5)H1-2230 (Tray2-HCF)H1-2233 (Tray2-HCF)H1-2330 (Tray3-HCF)H1-2333 (Tray3-HCF)H1-2430 (Tray4-HCF)H1-2433 (Tray4-HCF)Service ManualML-551x / 651x series4-37Samsung Electronics

4. Alignment and TroubleshootingError CodeError MessageTroubleshootingPageH2-1101Paper jam in front of finisher. Remove paper4-68 PageH2-1102Paper jam inside of finisher. Remove paper4-69 PageH2-1200Paper jam inside of finisher. Remove paper4-70 PageH2-1300Paper jam at exit of finisher. Remove paper4-71 PageH2-1302Paper jam at exit of finisher. Remove paper4-72 PageH2-1710H2-1711Finisher Failure: #H2-1710. Check finisherFinisher Failure: #H2-1711. Check finisher4-73 PageH2-1720H2-1721Finisher Failure: #H2-1720. Check finisherFinisher Failure: #H2-1721. Check finisher4-74 PageH2-1730H2-1731Finisher Failure: #H2-1730. Check finisherFinisher Failure: #H2-1731. Check finisher4-75 PageH2-1A70H2-1750H2-1751H2-1753Finisher Failure: #H2-1A70. Check finisherFinisher Failure: #H2-1750. Check finisherFinisher Failure: #H2-1751. Check finisherFinisher Failure: #H2-1753. Check finisher4-76 PageH2-1752Finisher Failure: #H2-1752. Check finisher4-77 PageH2-1760H2-1A80Finisher Failure: #H2-1760. Check finisherFinisher Failure: #H2-1A80. Check finisher4-78 PageH2-1800Finisher Failure: #H2-1800. Check finisher4-79 PageH2-1A20Finisher door is open. Close it4-80 PageH2-1A32Too much paper in finisher stacker. Remove printed paper4-82 PageH2-1A50Finisher Failure: #H2-1A50. Check finisher4-83 PageH2-1A62Staple cartridge is low. Replace it4-84 pageH2-1A63Staple cartridge is empty. Replace it4-85 PageH2-4100Paper jam in front of mailbox. Remove paper4-86 pageH2-4101Paper jam inside of mailbox. Remove paper4-87 pageH2-4102Paper jam inside of mailbox. Remove paper4-88 PageH2-4200Paper jam in front of bin 1. Remove paper4-89 PageH2-4201Paper jam at mailbox bin 1. Remove paper4-90 PageH2-4202Paper jam at mailbox bin 1. Remove paper4-91 PageH2-4300Paper jam in front of bin 2. Remove paper4-92 PageH2-4301Paper jam at mailbox bin 2. Remove paper4-93 PageH2-4302Paper jam at mailbox bin 2. Remove paper4-94 PageH2-4400Paper jam in front of bin 3. Remove paper4-95 PageH2-4401Paper jam at mailbox bin 3. Remove paper4-96 PageH2-4402Paper jam at mailbox bin 3. Remove paper4-97 PageH2-4500Paper jam in front of bin 4. Remove paper4-98 PageH2-4501Paper jam at mailbox bin 4. Remove paper4-99 PageH2-4502Paper jam at mailbox bin 4. Remove paper4-100 PageService ManualML-551x / 651x series4-38Samsung Electronics

4. Alignment and TroubleshootingError CodeError MessageTroubleshootingPageH2-4700H2-4701Mailbox Failure: #H2-4700. Check mailboxMailbox Failure: #H2-4701. Check mailbox4-101 PageH2-4710H2-4711Mailbox Failure: #H2-4710. Check mailboxMailbox Failure: #H2-4711. Check mailbox4-102 pageH2-4A20Mailbox door is open. Close it4-103 PageH2-4A32Too much paper in mailbox bin 1. Remove printed paper4-104 PageH2-4A35Too much paper in mailbox bin 2. Remove printed paper4-105 PageH2-4A38Too much paper in mailbox bin 3. Remove printed paper4-106 PageH2-4A3CToo much paper in mailbox bin 4. Remove printed paper4-107 PageM1-1110Paper Jam in Tray 14-108 PageM1-1610Paper Jam in MP tray4-108 PageM1-3122Tray1 cassette is pulled out. Insert it properly4-109 PageM1-4111Input System Failure: #M1-4111.4-109 PageM1-5112Paper Empty in tray14-110 PageM1-5612Paper Empty in MP4-110 PageM2-1110Paper Jam in tray14-111 PageM2-2110Jam top of duplex4-111 PageM2-2310Jam bottom of duplex4-112 PageM2-3120Install duplex unit.4-112 PageM3-1110Jam in exit area4-113 PageM3-2130Output bin full. Remove printed paper4-113 PageS2-4110Door is open. Close it4-114 PageS2-4610Rear Door is open. Close it4-115 PageS6-3123This IP address conflicts with that of other system4-116 PageS6-3128802.1x Network Error Contact the Admin.4-116 PageU1-2115Fuser Unit Failure: #U1-2115. Turn off then on4-117 PageU1-2117Fuser Unit Failure: #U1-2117. Turn off then on4-120 PageU1-2320Fuser Unit Failure: #U1-2320. Turn off then on4-122 PageU1-2330Fuser Unit Failure: #U1-2330. Turn off then on4-125 PageU1-2340Fuser Unit Failure: #U1-2340. Turn off then on4-129 PageU2-1111LSU Unit Failure: #U2-1111. Turn off then on4-132 PageU2-1113LSU Unit Failure: #U2-1113. Turn off then on4-133 PageService ManualML-551x / 651x series4-39Samsung Electronics

4. Alignment and Troubleshooting CodeA1-1110 Error messageActuator Motor Failure #A1-1110: Turn off then on. Symptom / CauseAfter working the main BLDC motor, the Ready signal has not occurred within 1 sec.1. Harness is defective. Connector is not connected properly.2. OPC coupler in the imaging unit has overloaded.3. Main BLDC motor is defective.4. Engine board is defective. Troubleshooting method :叛First, turn the machine off then on. If the error persists, refer to the following.1. Check if the connector is connected properly. Reconnect it.Main BLDCconnector2. OPC coupler has overloaded.After removing the imaging unit, rotate the OPC coupler.If there is any damage, the OPC coupler can’t rotate well.Replace the imaging unit.OPC couplerSpec : 4kgf.cmService ManualML-551x / 651x series4-40Samsung Electronics

4. Alignment and Troubleshooting3. The main BLDC motor is defective.- Unplug the connector from the motor.- Replace the main BLDC motor with new one.4. If the problem persists, replace the engine board.Service ManualML-551x / 651x series4-41Samsung Electronics

4. Alignment and Troubleshooting CodeA1-1210 Error messageActuator Motor Failure #A1-1210: Turn off then on. Symptom / CauseAfter working the Fuser BLDC motor, the Ready signal has not occurred within 1 sec.1. Harness is defective. Connector is not connected properly.2. Heat roller in the fuser unit has overloaded.3. Main BLDC motor is defective.4. Engine board is defective. Troubleshooting method叛First, turn the machine off then on. If the error persists, refer to the following.1. Check if the connector is connected properly. Reconnect it.Fuser BLDCconnector2. Heat roller in the fuser unit has overloaded.- Remove the fuser unit after removing rear cover and duplex unit.- Rotate the heat roller gear. If there is any damage, the heat roller gear can’t rotate well.(Spec : 5kgf.cm)Replace the fuser unit.Heat Roller Gear (Spec : 5kgf.cm)Service ManualML-551x / 651x series4-42Samsung Electronics

4. Alignment and Troubleshooting3. Engine Board is defective.- Unplug all connectors on the Engine Board.- Remove 4 screws.- Replace the Engine Board with new one.Remove all the connectors.4. Fuser BLDC Motor is defective.- Remove the Main Drive unit. (Screw 5 EA, Lever Coupler)- Remove the Engine Board & Engine Board bracket.- Remove the Main Board & Main Board bracket.- Remove the Rear Cover and duplex unit.- Remove the fuser unit.- Replace the fuser drive unit with new one.Main Drive unitMain BoardEngine board & BracketService ManualML-551x / 651x series4-43Samsung Electronics

4. Alignment and Troubleshooting CodeA1-1310 Error messageActuator Motor Failure #A1-1310: Turn off then on. Symptom / CauseAfter working the Pick-up BLDC motor, the Ready signal has not occurred within 1 sec.1. Harness is defective. Connector is not connected properly.2. Pick up/ Regi. clutch is defective.3. Main BLDC motor is defective.4. Engine board is defective. Troubleshooting method叛First, turn the machine off then on. If the error persists, refer to the following.1. Check if the connector is connected properly. Reconnect it.Check the connector2. Pick up/ Regi clutch is defective.- Remove the Regi. clutch then warm up the machine.If the corresponding error has disappeared, Regi. clutch is defective. Replace the Regi. clutch.- Remove the pick up clutch then warm up the machine.If the corresponding error has disappeared, pick up clutch is defective. Replace the pick up clutch.Regi clutch connectorPick up clutch connectorService ManualML-551x / 651x series4-44Samsung Electronics

4. Alignment and Troubleshooting3. Pick up BLDC motor is defective.- Unplug all connectors on the Engine Board.- Remove the Engine board with the bracket.- Replace the BLDC motor with new one.Remove all the connectors.4. Engine Board is defective.- Unplug all connectors.- Replace the Engine board with new one after removing 4 screws.Service ManualML-551x / 651x series4-45Samsung Electronics

4. Alignment and Troubleshooting CodeA1-3110 Error messageActuator Motor Failure #A1-3110 Symptom / CauseAfter working the Deve BLDC motor, the Ready signal has not occurred within 1 sec.1. Harness is defective. Connector is not connected properly.2. Mag. Roller is overloaded.3. Deve BLDC motor is defective.4. Engine board is defective. Troubleshooting method叛First, turn the machine off then on. If the error persists, refer to the following.1. Check if the connector is connected properly. Reconnect it.Check the connector2. Mag roller in the imaging unit is overloaded.- Rotate the Mag roller. If there is any damage, the Mag roller can’t be rotated well.(Spec : 4kgf.cm)Replace the imaging unit.Mag roller (Spec : 4kgf.cm)Service ManualML-551x / 651x series4-46Samsung Electronics

4. Alignment and Troubleshooting3. Deve BLDC motor is defective.- Replace the BLDC motor with new one.4. Engine Board is defective.- Unplug all connectors.- Replace the Engine board with new one after removing 4 screws.Remove all the connectors.Service ManualML-551x / 651x series4-47Samsung Electronics

4. Alignment and Troubleshooting CodeA2-1910 Error messageActuator Fan Failure: #A2-1910. Turn off then on. Symptom / CauseThe Main(SMPS) Fan does not work normally.1. Fan Harness connection is bad.2. Harness is defective or GND is short.3. Fan is defective. Troubleshooting method1. Check if the Fan Relay connector is connected properly.2. Connect the Harness Housing correctly.3. Check if the Fan harness is normal. If it is defective, replace it.4. Enter the Tech mode and execute the Main Fan test (EDC code : 100-0260 (SMPS FAN).To enter the Tech mode, press the button in this order.(Menu - # - 1 - 9 -3 -4 - OK )SMPS FANService ManualML-551x / 651x series4-48Samsung Electronics

4. Alignment and Troubleshooting CodeA2-1920 Error messageActuator Fan Failure: #A2-1920. Turn off then on Symptom / CauseThe Rear Fan does not work normally.1. Fan Harness connection is bad.2. Harness is defective or GND is short.3. Fan is defective. Troubleshooting method1. Check if the Fan Relay connector is connected properly.2. Connect the Harness Housing correctly.3. Check if the Fan harness is normal. If it is defective, replace it.4. Enter the Tech mode and execute the Main Fan test (EDC code : 109-0042 (Rear FAN).To enter the Tech mode, press the button in this order.(Menu - # - 1 - 9 -3 -4 - OK )Service ManualML-551x / 651x series4-49Samsung Electronics

4. Alignment and Troubleshooting CodeA2-2410 Error messageActuator Fan Failure: #A2-2410. Symptom / CauseThe LSU Fan does not work. Troubleshooting method1. Check if there is any obstacle in LSU Fan.2. Check if the harness is connected properly.3. Check if the joint connector is connected properly.4. Check if the harness is defective.5. Enter the tech mode and execute the LSU fan test.6. If the fan is defective, replace it.LSU FANService ManualML-551x / 651x series4-50Samsung Electronics

4. Alignment and Troubleshooting CodeA3-2110 Error messageActuator Sensor Failure: #A3-2110. Symptom / CauseID control algorithm to control the density finds the ID Sensor value input in an abnormal state.1. The image density of the imaging unit is abnormal.2. ID sensor (CTD sensor) is defective. Troubleshooting method1. In case of density defect.Print the sample page. If the density is too low or dark, replace the imaging unit.2. In case of ID sensor defect.Print the sample page. If the density is normal, replace the ID sensor or the sensor cleaning part. CodeA3-5110 Error messageActuator Sensor Failure: #A3-5110. Symptom / CauseThe signal level of the Toner Empty sensor is 0V. Troubleshooting method1. Remove the Left cover. Check if the sensor connector of the WTB Pipe unit is connected properly.2. If the harness is defective, replace it.Service ManualML-551x / 651x series4-51Samsung Electronics

4. Alignment and Troubleshooting CodeC1-1110 Error messageC1-1110 Prepare new toner cartridge. Symptom / CauseThe remaining toner in cartridge is less than 10% of its life.(10% is default, this value can be adjusted.) Troubleshooting methodCheck the life remaining of the toner cartridge.If its life is at the end, turn the machine off and replace the toner cartridge with new one. CodeC1-1120 Error messageC1-1120 Replace with new toner cartridge Symptom / CauseThe remaining toner in cartridge is less than 0% of its life. Troubleshooting methodCheck the life remaining of the toner cartridge.If its life is at the end, turn the machine off and replace the toner cartridge with new one. CodeC1-1140 Error messageC1-1140 Replace with new toner cartridge Symptom / CauseThe toner cartridge is at the end of its life. Troubleshooting methodReplace the toner cartridge with new one.Service ManualML-551x / 651x series4-52Samsung Electronics

4. Alignment and Troubleshooting CodeC1-1311C1-1412C1-1413C3-1312C3-1315 Error messageToner Failure: #C1-1311: Install toner againDid not supply enough toner. Reinstall itShake toner cartridge and then install.Imaging Unit Failure #C3-1312: Install IMG. unit.Imaging Unit Failure #C3-1315: Install IMG. unit. Symptom / CauseThe imaging unit does not get enough toner from the toner cartridge.1. The toner cartridge shutter does not work normally.2. The imaging unit shutter does not work normally.3. The toner cartridge seal is not removed.4. The toner cartridge is not installed properly.5. The toner is consumed quickly due to a defective image (Background etc.) Troubleshooting method1. Turn the machine off then on.2. Remove the toner cartridge.Thoroughly roll the cartridge five or six times to distribute the toner evenly inside the cartridge.And reinstall the toner cartridge.3. Try to print out the sample page more than 20 pages.4. Check the toner cartridge.- Check if the toner supply shutter between the toner cartridge and the imaging unit works normally.- Remove the seal. Check if the auger rotates normally.- Reinstall the toner cartridge.5. Replace the toner cartridge. Print out the sample page.6. Check if the toner supply motor works normally.Service ManualML-551x / 651x series4-53Samsung Electronics

4. Alignment and Troubleshooting CodeC1-1330C1-1411 Error messageToner Failure: #C1-1330: Install toner againToner cartridge is not installed. Install it Symptom / Cause1. The toner cartridge is not installed.2. The toner cartridge is not installed properly. Troubleshooting method1. Install the genuine samsung toner cartridge.2. If the toner cartridge is already installed, check the following.a. Reinstall the toner cartridge and imaging unit.b. Check If the CRUM contact is normal.c. After reinstallation, turn the machine off then on. CodeC1-1512 Error messageToner cartridge is not compatible. Check guide Symptom / CauseToner cartridge is not compatible. Troubleshooting method1. Check information of the toner cartridge.2. If the toner cartridge is not a genuine samsung toner cartridge, replace with new one.Service ManualML-551x / 651x series4-54Samsung Electronics

4. Alignment and Troubleshooting CodeC3-1110C3-1120C3-1140 Error messagePrepare new imaging unitReplace with new imaging unitReplace with new imaging unit Symptom / CauseThe remaining life of the imaging unit is less than 10% of its life.The remaining life of the imaging unit is less than 0% of its life. Troubleshooting methodPrepare the new imaging unit. CodeC3-1320C3-1330C3-1411C3-1412 Error messageIma