Toshiba e-STUDIO500P manual Desired temperature Noisy thermistor signal

Service error codes (9xx.xx) (continued)

Error	Sub	Display text	Description		Action
code	codes
920	.12	Hot roll fell too far below	•	Bad thermistor, circuit, or cabling.	Go to “920.xx—Cold fuser
		the desired temperature	•	Noisy thermistor signal.	service check” on page 2-87.
		while printing. Fuser
			•	Fuser not receiving AC power.
		page count between
		100,000 and 199,999.	• Poor supply line voltage.
			•	Low voltage or incorrect lamp.
			•	Incorrect hot roll.
920	.13	Hot roll too cool while	•	Bad thermistor, circuit, or cabling.	Go to “920.xx—Cold fuser
		checking for slope	•	Noisy thermistor signal.	service check” on page 2-87.
		change. Fuser page
			•	Fuser not receiving AC power.
		count between 100,000
		and 199,999.	• Poor supply line voltage.
			•	Low voltage or incorrect lamp.
			•	Incorrect hot roll.
920	.14	Hot roll too cool when	•	Bad thermistor, circuit, or cabling.	Go to “920.xx—Cold fuser
		heating to desired	•	Noisy thermistor signal.	service check” on page 2-87.
		temperature after slope
			•	Fuser not receiving AC power.
		change. Fuser page
		count between 100,000	• Poor supply line voltage.
		and 199,999.
			•	Low voltage or incorrect lamp.
			•	Incorrect hot roll.
920	.16	Fuser is not increasing	•	Fuser is not receiving AC power.	Go to “920.xx—Cold fuser
		in temperature even	• Poor supply line voltage.		service check” on page 2-87.
		though the lamp has
		been on for an extended
		time. Fuser page count
		between 100,000 and
		199,999.
920	.17	Fuser has been below	•	Bad thermistor, circuit, or cabling.	Go to “920.xx—Cold fuser
		the desired temperature	•	Very noisy thermistor signal.	service check” on page 2-87.
		for too long while the
			•	Fuser not receiving AC power.
		media is in the nip.
		Fuser page count	• Poor supply line voltage.
		between 100,000 and
			•	Excessive load on the fuser.
		199,999.
			•	Low voltage or incorrect lamp.
			•	Incorrect hot roll.
			•	Abrupt change in temperature that
				has disrupted control.
920	.21	Hot roll took too long to	•	Bad thermistor, circuit, or cabling.	Go to “920.xx—Cold fuser
		heat up after	•	Fuser not receiving AC power.	service check” on page 2-87.
		transitioning to new
			•	Poor supply line voltage.
		enhanced mode. Fuser
		page count between	•	Low voltage or incorrect lamp.
		200,000 and 299,999.
			•	Incorrect hot roll.

2-10Service Manual