• Code: 88
• Description: Toner Low
• Remedy: This message displays when toner low occurs and the toner low alarm is activated. Press Go to clear this message.

• Code: 900
• Description: RIP software
• Remedy: Server firmware problem. Contact the next level of support.

• Code: 902
• Description: General engine software failure
• Remedy: An unrecoverable system software error. Reset the printer (POR). If the problem continues, replace the controller card.

• Code: 910 ... 913
• Description: 910 DC exit motor stall 911 DC exit motor 912 DC exit motor below speed 913 DC exit motor over speed
• Remedy: The load on the exit motor is too high or there is a cabling problem. First, check for jams and then move the exit rollers, located between the rear door and fuser, while observing the DC motor. If the torque is too high, isolate the problem to the redrive and repair or replace as necessary. If the torque seems normal, check the cabling for continuity and replace the motor with cabling.

• Code: 914
• Description: DC pick motor–no encoder feedback Verify motor is plugged into controller card correctly. Also check load condition
• Remedy: The load on the exit motor is too high or there is a cabling problem. First, check for jams and then move the exit rollers, located between the rear door and fuser, while observing the DC motor. If the torque is too high, isolate the problem to the redrive and repair or replace as necessary. If the torque seems normal, check the cabling for continuity and replace the motor with cabling.

• Code: 917
• Description: Transfer roll The most likely cause is a faulty HVPS. It may also indicate a problem in the transfer roll area
• Remedy: Check the springs in the left and right transfer roll bearings. The bearing assemblies should support the transfer roll, applying even pressure to the PC drum. The roll should rotate evenly and smoothly. Replace the transfer roll assembly if the springs or bearings indicate damage or lack of proper function. Inspect the transfer roll for signs of wear, damage, or contamination. Replace the assembly as necessary. Note: Do not vacuum the roll. Note: Always check the bottom margin following a transfer roll replacement.

• Code: 920 ... 924
• Description: 920 Fuser error Indicates that the fuser is below temperature when printing. 922 Fuser error Fuser failed to reach standby temperature. Verify line voltage to the fuser. 923 Fuser error Fuser is too hot during printing or when printer is idle. 924 Fuser error An open circuit has been detected in the fuser thermistor circuit. Check cabling and connectors.
• Remedy: Cold fuser service check
  Fuser assembly LVPS Unplug the printer and disconnect the fuser heater cable from the LVPS card connector (CN3). See “Low voltage power supply (LVPS)” for more information. Check for continuity across the fuser heater (pins #1 and #3 or outer pins). If there is no continuity, replace the fuser assembly. See “Fuser assembly removal”. If there is continuity, follow these steps: 1. Reconnect the fuser heater cable. 2. Replug and turn the printer on. Measure the voltage between the connectors on the back of the switch. It should match the line voltage. 3. If line voltage is not present, replace the LVPS. Make sure the fuser thermistor is correctly connected to the controller card (J18). Fuser assembly If the fuser heater comes on and a fuser failure error code displays, be sure the thermistor is firmly seated in connector J18 on the controller card assembly. (The thermistor cable goes through the frame by way of a connector.) Unplug the printer and disconnect the thermistor cable from the controller card (J18). Measure the resistance of the thermistor. The resistance measures approximately 240K to 400K ohms when cool (approximately 40°C or 104°F) and 1.5K to 3K ohms hot (immediately after running a printout). Replace the fuser assembly as necessary.
  Hot fuser service check
  Fuser assembly Unplug the printer and measure the resistance of the thermistor. The resistance measures 240K to 400K ohms when cool (approximately 40°C or 104°F) and 1.5K to 3K ohms hot. Replace the fuser assembly as necessary.

• Code: 929
• Description: Toner sensor The toner sensor is not operating properly, the developer drive assembly is not operating properly, or the print cartridge is defective.
• Remedy: Sensor Test This test is used to determine if the input tray sensors are working correctly. 1. Select the Sensor Test from the Input Tray Test menu. 2. Select the input source. Only installed sources display, but may include Tray 1, Tray 2, Tray 3, MP Feeder. 3. A list of sensors appears, depending upon the input source selected. For example, if tray 2 were selected: TP refers to tray present sensor. P refers to pass thru sensor. OP indicates the sensor is open. CL indicates the sensor is closed. Not all sources have the same set of sensors. The table below indicates which sources should display which sensors. Tray 1 Yes1 No Tray 2 Yes2 Yes3 Tray 3 No Yes3 Multipurpose feeder Yes No 1 Only available when tray 2 is installed. 2 Only available when tray 3 is installed 3 Only available if tray is 250-sheet drawer. 4. Press Return or Stop to exit the test.