Diagnostic information 2-89922.xx—Cold fuser checkError codes 920.xx and 922.xx may display for a cold fuser failure.Some 920.xx error codes may be cleared by turning the printer on and off and allowing it to complete POR.CAUTION: There is a danger from hazardous voltage in the area of the printer where you areworking. Unplug the printer before you begin, or use caution if the printer must receive power inorder to perform the task.Service tip: Set the Fuser Temperature to NORMAL before starting this service check. In Diagnostics mode,select EP SETUP, and Fuser Temp.FRU Action1 Fuser lamp Remove the fuser assembly and check to make sure the correctfuser lamp has been installed. If the correct lamp has been installed,go to step 2.Note: If the fuser lamp is replaced, allow the fuser assembly to coolor a 925.xx error code could be displayed.2 AC line voltage CAUTION: When taking measurements for AC power, observe allsafety precautions.Check the AC line voltage to make sure it is within operatingspecification. If incorrect, inform the customer; if correct, go to step 3.3 LVPS CAUTION: When taking measurements for AC power, observe allsafety precautions.Unplug the AC line cord from the printer and pull the LVPS out farenough to access CN1 on the LVPS board (see “Low voltagepower supply removal” on page 4-55). Disconnect the LVPS tofuser AC cable, plug in the line cord, turn the printer on and measurethe voltage between CN1-1 and CN1-3 on the connector (see theconnector locations at “Low voltage power supply removal” onpage 4-55).If incorrect, replace the LVPS assembly (see “Low voltage powersupply removal” on page 4-55); if correct, go to step 4.4 LVPSLVPS fuser AC cableCAUTION: When taking measurements for AC power, observe allsafety precautions.Disconnect the AC line cord from the printer. Disconnect the LVPS tofuser cable from the fuser to fuser lamp cable. Plug the AC line cordinto the printer and check the AC line voltage between the pins onthe fuser end of the LVPS to fuser AC cable. If the voltage is correct,unplug the AC power cord from the LVPS cable and pull the LVPSout far enough to be able to check the voltage between CN-1 andCN-3 on the LVPS board. Plug in the power cord, turn the printer onand check the voltage. If correct, replace the LVPS to fuser AC cable;if incorrect, replace the LVPS assembly. See “Low voltage powersupply removal” on page 4-55.Note: If the fuses in the LVPS are blown, the LVPS assembly mustbe replaced.5 Fuser top cover assembly(thermistor, thermistorcable)Fuser to system board DCcableCheck to make sure that the thermistor is installed correctly to J5 onthe fuser control card. If installed correctly check the cable for anysigns of damage. If any problems are found, replace the fuser topcover assembly.“Fuser narrow media sensor removal” onpage 4-35.If no problem is found, check the fuser to system board DC cable forcorrect installation at J1 on the fuser control card. If no problem isfound, check the fuser to system board cable for correct installationat J10 on the system board. If no problem is found, go to step 6.
