Lexmark C782 Service Manual - Page 61

5061 122.02 error code service check Hot fuser Error code 122.02 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. Step 1 Actions and questions 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? 2 Turn the printer on, and measure the voltage on connector J17-11 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? Yes Go to step 2 Replace the fuser assembly. See "Fuser assembly removal" on page 4-44. No Replace the LVPS assembly. See "LVPS assembly removal" on page 4-53. Replace the system board. See "System board removal" on page 4-89. 122.03 error code service check Hot roll thermistor circuit is open If error code 122.03 displays, the printer detects a problem in the fuser hot roll, fuser hot roll thermistor, system board, or LVPS fuser control circuits. Step 1 2 Actions and questions Turn the printer on, and allow it to reach the Ready prompt. Note: The printer may not complete POR and post a 122.03 Error message. Measure the voltage on connector J17-6 on the system board. The voltage should measure approximately +3.3 V dc. Is the voltage correct? 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? Yes Go to step 2 Replace the fuser assembly. See "Fuser assembly removal" on page 4-44. No Replace the system board. See "System board removal" on page 4-89. Replace the LVPS assembly. See "LVPS assembly removal" on page 4-53. Diagnostic information 2-19