Toshiba e-STUDIO500P manual Toner sensor service check, Action

Toner sensor service check

Service tip: Check the print darkness menu setting before checking the toner sensor.

This service check is intended to be used when a 929.xx Service Error displays.

	FRU	Action
1	Developer drive assembly	Incorrect operation of the developer drive assembly can cause the
		printer to display a 929.xx error code (Toner Sensor). Check the
		developer drive assembly for correct installation or, any sign of worn,
		loose, or broken parts.
2	Front harness cable	Check the toner sensor portion of the front harness cable to make
		sure it is properly seated into the toner sensor. If correct at both the
		sensor and system board (J15), check the continuity of the cable. If
		incorrect, replace the cable.
3	Toner sensor	The toner sensor cable is part of the front harness and part of
		connector J15 on the system board. Check the voltage at J15-11. It
		reads approximately +5 V dc. If incorrect, replace the system board.
		If correct, check the voltage at J15-12. It reads approximately +5 V dc
		with the system board removed from the printer. If incorrect, replace
		the system board. If correct, replace the toner sensor assembly. A
		bad ground connection between J15-13 on the system board and
		pin 3 on the toner sensor results in a 929 service error.

Diagnostic information 2-127