• Code: 117
• Description: Printhead Error A yellow printhead servo error has been detected. Verify all packing material have been removed from the printer and the printhead.
• Remedy: 1. Verify all the printhead cables are properly seated. If the printhead cables are properly seated and the error remains, record the error code. Continue to the next step. 2. Determine how to setup the printhead diagnostic tool. a. Verify the printhead diagnostic tool is configured as in the illustration below. Reconfigure if necessary. b. Select which pair of printheads to use based on the error code. If the printer displays the codes that indicate yellow or cyan, use the tool to switch the yellow and cyan signals. If the error codes indicated a magenta or black error, use the tool to switch the magenta and black signals. 3. Install the printhead diagnostic tool and determine the problem. The following procedure shows the yellow and cyan switch as an example. a. Turn off the printer. b. Unplug the printhead cables from the system board in the printer and connect them to the printhead diagnostic tool. c. Connect the printhead diagnostic tool cables to the connectors on the system board in the printer. This reverses the printhead color signals for the selected pair of colors. d. Turn on the printer and note the new error codes. • If an automatic calibration begins, 36 Printer Service Required may appear. The printhead and system board are working correctly and the printhead cable connections should be checked. Press Go to clear the error. • If the error code remains the same, replace the system board. If that solves the problem, you are finished. • If the printer displays a different printhead error code, which indicates another color, the printhead or the printhead cables are defective. See the table below for the printhead codes. For example, the printer originally displays the printhead error code 108 (yellow). After switching the signals using the diagnostic tool, the printer displays the printhead error code 106 (cyan). 4. Remove the printhead diagnostic tool. 5. The problem is in either the printhead cables or the printhead. Replace the printhead cables. If the problem persists, replace the printhead. See “Printhead removal and adjustments”. Note: Replace and adjust only one printhead at a time.

• Code: 120, 121
• Description: 120 Fuser Error Wrong fuser lamp - hot roll - 121 Fuser Error Wrong fuser lamp - BUR
• Remedy: Replace the fuser assembly.

• Code: 122
• Description: Fuser Error Fuser below temperature when printing - hot roll
• Remedy: Cold fuser If error code 122 displays, the printer has detected a problem in the fuser hot roll lamp circuity, back up roll fuser lamp circuits, fuser hot roll thermistor, back up roll thermistor, system board, or LVPS fuser control circuits. Replace the following FRUs in the order shown: 1. “Fuser assembly”. 2. “LVPS assembly”. 3. “System board”.

• Code: 123
• Description: Fuser Error Fuser below temperature when printing - BUR
• Remedy: Cold fuser If error code 123 is displays, the printer detects a problem in the fuser hot roll lamp circuits, back up roll fuser lamp circuits, fuser hot roll thermistor, back up roll thermistor, system board, or LVPS fuser control circuits. Replace the FRUs in the following order. 1. “Fuser assembly”. 2. “LVPS assembly”. 3. “System board”.

• Code: 124
• Description: Fuser Error Fuser over temperature - hot roll
• Remedy: Error code 124 displays whenever the printer detects a problem with the fuser running over temperature or the fuser lamps have been on too long. A problem could exist in the fuser assembly with the hot roll bearings, hot roll thermistor, or other hot roll parts. The LVPS or system board assembly can also be failing. 1 Open the right fuser access door. Observe the fuser and see if the hot roll fuser lamp turns on and off. You may have to observe for a few minutes. Do the lamps turn off and on? Go to step 2 Replace the “LVPS assembly”. 2 Turn the printer on and measure the voltage on connector J33-11 on the system board. The voltage should measure approximately +0.13 V dc to +0.64 V dc as the hot roll lamp turns on and off. Is the voltage correct? Replace the“Fuser assembly”. Replace the “System board”.

• Code: 125
• Description: Fuser Error Fuser over temperature - BUR. Error code 125 displays whenever the printer detects a problem with the fuser running over temperature or the fuser lamps have been on too long. A problem exists in the fuser assembly with the back up roll bearings, back up roll thermistor, LVPS, or system board.
• Remedy: 1 Open the right fuser access door. Observe the fusser and see if the backup roll fuser lamp turns on and off. You may have to observe for a few minutes. Does the lamp turn off and on? Go to step 2 Replace the “LVPS assembly”. 2 Turn the printer on and measure the voltage on connector J33-12 on the system board. The voltage should measure approximately +0.13 V ac to +0.64 V ac as the backup roll lamp turns on and off. Is the voltage correct? Replace the “Fuser assembly”. Replace the “System board”.

• Code: 126
• Description: 126 Fuser Error Fuser open thermistor hot roll. Hot roll thermistor or thermistor circuits are open If error code 126 displays, the printer detects a problem in the fuser hot roll, back up roll lamp circuits, fuser hot roll thermistor, back up roll thermistor, system board, or LVPS fuser control circuits.
• Remedy: 1 Turn the printer on and allow it to reach the Ready prompt. Note: The printer may not complete POR and post a 126 Error message. Measure the voltage on connector J33-6 on the system board. The voltage should measure approximately +3.3 V dc. Is the voltage correct? Go to step 2 Replace the “System board”. 2 Measure the voltage on the fuser DC control connector on the LVPS. Measure the voltage on pin 6 of the connector. Does the voltage measure approximately +3.3 V dc? Replace the“Fuser assembly”. Replace the “LVPS assembly”

• Code: 127
• Description: Fuser Error Fuser open thermistor BUR. Backup roll thermistor or thermistor circuits are open If error code 127 displays the printer detects a problem in the fuser hot roll or back up roll fuser lamp circuits, fuser hot roll thermistor, back up roll thermistor, system board, or LVPS fuser control circuits.
• Remedy: 1 Turn the printer on and allow it to reach the Ready prompt. Note: The printer may not complete POR and post a 127 Error message. Measure the voltage on connector J33-7 on the system board. The voltage should measure approximately +3.3 V dc. Is the voltage correct? Go to step 2 Replace the “System board”. 2 Measure the voltage on the fuser DC control connector on the LVPS. Measure the voltage on pin 7 of the connector. Is the voltage measure approximately +3.3 V dc. Replace the “Fuser assembly”. Replace the “LVPS assembly”