HP Pro 4300 C9H70UT C9H70UT#ABA manual On page 340, or

Table 41. Alphabetical printer messages (continued)

Message	Description	Action
TRAY XX CONTAINS	The media type or size in the	1. To change the media type,
UNKNOWN MEDIA	specified tray cannot be		press the SELECT (		)
	determined.		button. Use the
			UP ARROW ( ) button and
			the DOWN ARROW (		)
			button to scroll to the type,
			and then press the
			SELECT (	) button to select
			it.
		2. To change the media size to
			Letter, A4, Executive, B5 JIS,
			A5, or Legal, leave the tray
			switch in the “standard”
			position.
		3. To change the media size to
			other sizes, move the tray
			switch to “custom”, adjust the
			paper guides against the
			paper, and close the tray. Use
			the UP ARROW ( ) button
			and the DOWN ARROW ( )
			button to scroll to the media
			size, and then press the
			SELECT (	) button to select
			it.
TRAY XX EMPTY	The specified tray is empty, but	1.	Refill the indicated tray.
<TYPE> <SIZE>	the current job does not require	2. If the error persists, verify that
	this tray in order to print correctly.		the indicated tray’s paper-out
alternates with			sensor (PS105,PS101,
			PS801, or SR3) is properly
READY			functioning correctly. See
For help press			figure 213 on page 336,
			figure 217 on page 340, or
			figure 220 on page 343.
TRAY XX OPEN	The specified tray is open or not	1.	Close the tray.
For help press	closed completely.	2. If this error persists, verify
			that the indicated tray’s
alternates with			media-size sensors (SW102,
			SW801, or SW1) is properly
READY			functioning correctly. See
For menus press			figure 213 on page 336,
			figure 217 on page 340, or
			figure 220 on page 343.
			Verify that the sensor
			“fingers” inside the tray are
			engaging the tray sensor
			correctly. See “Tray 2, 500-,
			1,500-sheet feeder media
			size detection” on page 83.

270 Troubleshooting Q2431-90912