Toshiba e-STUDIO500P manual Fuser service checks, Xx-Cold fuser service check

Fuser service checks

920.xx—Cold fuser service check

Error codes 920.x 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: Some 920.xx errors can be caused by multiple sheets of paper being fed up to the fuser.

Service tip: Set the Fuser Temperature to NORMAL before starting this service check. In Diagnostics mode,

select EP SETUP, and Fuser Temp.

Service tip: It may take several minutes for the error codes 920.xx and 922.xx to be displayed after the printer is turned on.

	FRU	Action
1	Fuser lamp	Observe the lamp through the left near side of the printer. It may be
	Fuser lamp AC cable	necessary to remove the redrive assembly to observe the lamp
		turning on and off. If the lamp does not come on do the following:
		• If not previously removed, remove the redrive assembly. See
		“Redrive assembly removal” on page 4-74.
		• Remove the fuser assembly. See “Fuser assembly removal” on
		page 4-26.
		• Make sure the correct type of lamp is installed (voltage and
		wattage).
		• Verify that the fuser to fuser lamp cable is installed correctly to the
		fuser top cover assembly. If incorrect, install correctly; if correct,
		go to step 2.
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” on page 5-10).
		If incorrect, replace the LVPS assembly (see “Low voltage power
		supply removal” on page 4-54); if correct, go to step 4.
4	Fuser lamp	Check continuity of the fuser to fuser AC cable, fuser top cover
	Fuser top cover assembly	assembly, and fuser lamp by checking the continuity between the two
		pins on the fuser lamp AC cable connector:
	Fuser connect cable (fuser
		• If there is continuity, go to step 5.
	to fuser lamp cable)
		• If there is no continuity, check the continuity of the fuser to fuser
		lamp AC cable. If incorrect, replace the lamp, if incorrect, replace
		the fuser top cover assembly.
		Note: If the fuser lamp is replaced, allow the fuser assembly to cool
		or a 925.xx error may be displayed.

Diagnostic information 2-87