• Code: 54.2
• Display: 54.2 CAROUSEL ERROR CYCLE POWER
• Description: Indicates that the color toner carousel is not working correctly. This could be caused by an obstruction in the carousel path, such as a loose shutter or disengaged toner cartridge.
• Remedy: 1 Turn the printer off and on to reset the printer. 2 Open the carousel door and waste toner tray. Look for an obstruction, such as a toner cartridge shutter catching on the waste toner tray. Verify the toner lock lever is fully locked. If the message does not clear after closing the doors, turn the printer off and on to reset the printer. 3 Clean the carousel position sensor (PS3) with compressed air. If the problem persists, replace the sensor. 4 Reconnect connector J701 on carousel motor PCA; connectors J641, J642, J644, and J648 on the main relay PCA; connector J672 on the subrelay PCA; and connector J102 on the power supply. 5 Check operation of the carousel stopper arm. Replace the carousel stopper solenoid. 6 Check electrical continuity between connector J641-1 (+24 VB) and J642-3 (PMP) on the main relay PCA when the door switch (SW641) is turned on. If there is no electrical continuity, replace the main relay PCA. 7 Check electrical continuity between connector J644-1 (PBK) and J644-2 (PMP) on the main relay PCA when the door switch (SW644) is turned on. If there is no electrical continuity, replace the black toner cartridge on/off switch. 8 Check electrical continuity between connector J642-1 (PYMC) and J642-2 (PBK) on the subrelay PCA when the door switch (SW673) is turned on. If there is no electrical continuity, replace the toner cartridge cover switch in the subrelay PCA. 9 Check electrical continuity between connector J642-1 (PYMC) and J648-1 (+24 VAR) on the main relay PCA when the door switch (SW642) is turned on. If there is no electrical continuity, replace the main relay PCA. 10 Measure the voltage across connector J648-1 (+24 VAR) and J648-3 (GND) on the main relay PCA after the printer is turned on. If the voltage is not 24 V, replace the main relay PCA. 11 Reconnect connectors J704 and J706 on the carousel motor PCA, and connector J220 on the controller board. 12 Reconnect connector J43 on the carousel position sensor, relay connector J42 and connector J207 on the controller board. 13 Measure the voltage across connector J220- A6 (RLSROT) and J220-B5 (GND) on the controller board after the printer is turned on. If the voltage changes to about 3.5 V from 0 V, replace the carousel motor PCA. 14 Replace the carousel motor (M1). 15 Replace the controller board.

• Code: 54.3
• Display: 54.3 CALIBRATION WARNING PRESS GO TO CONTINUE
• Description: The process marks in the density sensing pattern are corrupted (see chapter 5 for more information).
• Remedy: 1 Press GO. 2 Print a configuration page and troubleshoot as an image-quality problem. 3 Check the transfer guide for cracks and replace the transfer guide as needed.

• Code: 54.4
• Display: 54.4 WASTE TONER SENSOR ERROR CYCLE POWER
• Description: The waste toner sensor has failed. Printing cannot continue.
• Remedy: 1 Replace the waste toner sensor assembly. 2 Replace the imaging drum.

• Code: 55
• Display: 55 PRINTER ERROR CYCLE POWER
• Description: Indicates a printer command error. The commands cannot be exchanged between the printer and its controller.
• Remedy: 1 Turn the printer off and on to reset the printer. 2 Verify the controller board is fully seated.

• Code: 56.1
• Display: 56.1 ERROR CYCLE POWER POWER
• Description: Indicates an input feed error (such as requesting to feed transparencies through the duplexer), or that the input tray is not installed.
• Remedy: 1 If the input tray you are trying to print from is not installed, install the input tray. 2 Turn the printer off and on to reset the printer.

• Code: 56.2
• Display: 56.2 ERROR CYCLE POWER
• Description: Indicates an illegal output error. For example, the multi-bin mailbox is not installed and it was selected as the output destination, or there are transparencies in the duplexer.
• Remedy: 1 Open the printer and remove media from the paper path. 2 Verify that the media type is set in the printer control panel. 3 Turn the printer off and on to reset the printer.

• Code: 57.1
• Display: 57.1 FAN FAILURE
• Description: One of the cooling fans failed or is obstructed. 1 = Fan 1 (FM 1)
• Remedy: Caution: Turn the printer off and do not operate the printer in this condition or it can be seriously damaged. 1 Turn the printer off and on to reset it. 2 Reconnect connectors J702 and J706 on the carousel motor PCA, and connector J220 on the controller board. 3 Reconnect connector J701 on the carousel motor PCA, connectors J648 and J641 on the main relay PCA, and connector J102 on the DC power supply. 4 Measure the voltage across J702-3 (FAN1ON) and J701-2 (GND) on the carousel motor PCA after the printer is turned on. If the voltage changes from 0 V to 24 V, replace fan 1. 5 Measure the voltage across connector J701-1 (+24 VB) and J701-2 (GND) on the carousel motor PCA after the printer is turned on. If the voltage is about 24 V, replace the carousel motor. 6 Measure the voltage across connector J641-1 (+24 VB) and J641-4 (GND) on the main relay PCA after the printer is turned on. If the voltage is not 24 V, replace the main relay PCA. 7 Check the AC power supply. 8 If the problem is not rectified after the printer is turned off and on again, find the cause of activation of the overcurrent/overvoltage detection circuit in the power supply. Wait more than two minutes before turning the power back on. 9 Replace the power supply.

• Code: 57.2
• Display: 57.2 FAN FAILURE
• Description: One of the cooling fans failed or is obstructed. 2 = Fan 2 (FM 2)
• Remedy: Caution: Turn the printer off and do not operate the printer in this condition or it can be seriously damaged. 1 Turn the printer off and on to reset it. 2 Reconnect connectors J703 and J706 on the carousel motor PCA and connector J220 on the controller board. 3 Reconnect connector J701 on the carousel motor PCA, connector J648 on the main relay PCA, and connector J102 on the DC power supply. 4 Measure the voltage across connector J703-3 (FAN2ON) and J703-1 (GND) on the carousel motor PCA after the printer is turned on. If the voltage changes from 0 V to 24 V, replace fan 2. 5 Measure the voltage across connector J701-1 (+24 VB) and J701-2 (GND) on the carousel motor PCA after the printer is turned on. If the voltage is about 24 V, replace the carousel motor. 6 Measure the voltage across connector J641-1 (+24 VB) and J641-4 (GND) on the main relay PCA after the printer is turned on. If the voltage is 24 V, replace the main relay PCA. 7 Check the AC power supply. 8 If the problem is not rectified after the printer is turned off and on again, find the cause of activation of the overcurrent/overvoltage detection circuit in the power supply. Wait more than two minutes before turning the printer back on. 9 Replace the power supply.