Lexmark 5016-001 manual Serial Port Service Check, Toner Level Detect Service Check

5016-001

Serial Port Service Check

Run the “Serial Wrap Test” on page 3-14.

The Serial Wrap Test is designed to check the serial port hardware, by using a wrap plug (P/N 1329048) which invokes the Serial Post Diagnostic Test. The test isolates the printer from the serial cable and host, displaying failure information for approximately three seconds. If the test indicates a problem, replace the controller board.

Toner Level Detect Service Check

Note: The toner level sensor is mounted on the same board as the new cartridge detect sensor and is located in the bottom of the printer. The toner cartridge contains two mirrors mounted behind a window in the cartridge that reflect infrared light from an LED, mounted on the sensor board, back to a photo transistor also mounted on the sensor board.

The printer does not detect the level of toner left in the cartridge.

	FRU	Action
1	Toner Cartridge	Try a new cartridge for cartridges for which the
		level of toner, has not been sensed.
2	Toner Level/	Check the sensor board assembly for signs of
	New Cartridge	excessive toner, paper dust or other contaminants.
	Detect Sensor	Blow off contaminants with clean dry air. If the
		sensor board is clean, replace the FRUs in the
	Board	following order:
	Engine Board	1.	Toner level/new cartridge detect sensor board
	TE Cable	2.	Engine board
		3.	TE cable

2-96Service Manual