HP P2050 Door Open, Engine communication error, Install black cartridge, Jam in cartridge area

Alert message	Description	Recommended action
Door Open	Opening the front door opens the front door	1.	Remove the left cover, and then open
	switch (SW301) and disables the +24 V to the		and close the front door. Determine if
	high-voltage contacts on the print cartridges.		SW301 closes when the door closes.
		2.	Make sure that the two connectors from
			the engine control PCA to the switch are
			securely installed on the switch
			contacts.
		3.	Replace the front door switch (SW301).
			if the message persists. See Cartridge-
			door switch on page 137.
Engine communication error	The product experienced an internal	Turn off the power by using the power switch,
	communication error.	wait at least 30 seconds, and then turn on the
		power and wait for the product to initialize.
		If you are using a surge protector, remove it.
		Plug the product directly into the wall socket.
		Use the power switch to turn the product on.
Install black cartridge	The product checks for the presence of a print	1.	Make sure that the sealing tape on the
	cartridge at start up and anytime the top cover		print cartridge has been removed.
	is closed. At start up or when the top cover is	2.	Verify that the print cartridge is correctly
	closed, a high voltage bias is placed on the
	print cartridge's developer roller. This		installed.
	message appears if the print cartridge's	3.	Inspect the high voltage contact on the
	antenna is unable to detect the high voltage
	bias.		print cartridge and in the print cartridge
			cavity to make sure that they are not
			damaged.
		4.	If the messages persists, install another
			HP print cartridge.
		5.	Make sure that the engine controller
			PCA is correctly installed.
Jam in cartridge area	Photosensors PS913 (media width sensor),	1.	Make sure that the paper meets
	PS912 (top of page sensor), and PS915		specifications. See Supported paper
	(fusing assembly exit sensor) detect paper in		and print media on page 32. See
	the cartridge area of the product. See Figure		Common causes of jams on page 229.
	7-7 Components in the print cartridge cavity	2.	Open the top cover, and remove the
	on page 199 and Figure 7-6 Components on
	the rear side of the product on page 198. If		print cartridge. Remove any paper or
	paper arrives at these sensors too early,		paper fragments present.
	leaves the sensors too late, or is present at	3.	Lift the registration flap. Make sure
	the sensor when not expected, an error
	message is displayed.		sensors PS913 and PS912 move freely.
			See Figure 7-7 Components in the print
			cartridge cavity on page 199.
		4.	Open the straight-through output door
			and verify that PS915 moves freely. See
			Figure 7-6 Components on the rear side
			of the product on page 198.
		5.	Make sure that the connector at J203
			and J206 on the engine controller PCA
			are seated.

216 Chapter 7 Solve problems ENWW