Toshiba e-STUDIO500P Xx-Cold fuser check, Cover assembly.Fuser narrow media sensor removal on

922.xx—Cold fuser check

Error 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 are working. Unplug the printer before you begin, or use caution if the printer must receive power in order 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	Action
1	Fuser lamp	Remove the fuser assembly and check to make sure the correct fuser
		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 cool
		or a 925.xx error code could be displayed.
2	AC line voltage	CAUTION: When taking measurements for AC power, observe all
		safety precautions.
		Check the AC line voltage to make sure it is within operating
		specification. If incorrect, inform the customer; if correct, go to step 3.
3	LVPS	CAUTION: When taking measurements for AC power, observe all
		safety precautions.
		Unplug the AC line cord from the printer and pull the LVPS out far
		enough to access CN1 on the LVPS board (see “Low voltage power
		supply removal” on page 4-54). Disconnect the LVPS to fuser AC
		cable, plug in the line cord, turn the printer on and measure the
		voltage between CN1-1 and CN1-3 on the connector (see the
		connector locations at “Low voltage power supply removal” on
		page 4-54).
		If incorrect, replace the LVPS assembly (see “Low voltage power
		supply removal” on page 4-54); if correct, go to step 4.
4	LVPS	CAUTION: When taking measurements for AC power, observe all
	LVPS fuser AC cable	safety precautions.
		Disconnect the AC line cord from the printer. Disconnect the LVPS to
		fuser cable from the fuser to fuser lamp cable. Plug the AC line cord
		into the printer and check the AC line voltage between the pins on the
		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 LVPS out
		far enough to be able to check the voltage between CN-1 and CN-3
		on the LVPS board. Plug in the power cord, turn the printer on and
		check the voltage. If correct, replace the LVPS to fuser AC cable; if
		incorrect, replace the LVPS assembly. See “Low voltage power
		supply removal” on page 4-54.
		Note: If the fuses in the LVPS are blown, the LVPS assembly must be
		replaced.
5	Fuser top cover assembly	Check to make sure that the thermistor is installed correctly to J5 on
	(thermistor, thermistor	the fuser control card. If installed correctly check the cable for any
	cable)	signs of damage. If any problems are found, replace the fuser top
	Fuser to system board DC	cover assembly.“Fuser narrow media sensor removal” on
		page 4-34.
	cable
		If no problem is found, check the fuser to system board DC cable for
		correct installation at J1 on the fuser control card. If no problem is
		found, check the fuser to system board cable for correct installation at
		J10 on the system board. If no problem is found, go to step 6.

Diagnostic information 2-89