HP Pro 4300 C9H70UT C9H70UT#ABA manual Jams in tray 3 and/or tray

Jams in tray 3 and/or tray 4

Table 46. Causes of tray 3 and or tray 4 jams

Cause	Solution
The feed or separation rollers are dirty, worn, or	Clean the rollers. If they are dirty after cleaning, or if
damaged.	they are worn or damaged, replace the rollers. See
	“500-sheet feed rollers” on page 204 and/or
	“1,500-sheet feeder feed rollers” on page 214 and
	“1,500-sheet feeder separation roller” on page 214.
The pickup roller is worn or damaged.	Replace the pickup roller.
The tray 3 or tray 4 paper pickup drive gears are	Check the drive gears in the paper-pickup unit.
damaged, or the assembly is defective.	Replace the pickup drive assembly if the gears are
	damaged. See “500-sheet feeder paper-pickup drive
	assembly” on page 210 and/or “1,500-sheet feeder
	paper-pickup drive assembly” on page 225.
The connector to the printer has poor contact.	Inspect the connector to the printer. Replace any
	damaged connectors.
The paper feeder pickup solenoid is damaged.	1. Disconnect the connector for the paper feeder
	solenoid from the feeder control PCA.
	2. Measure the resistance between the cable
	connectors.
	3. If the measured resistance is not approximately
	160 ohms, replace the paper-feeder pickup
	solenoid. See “500-sheet feeder switches,
	sensors, solenoids, and PCAs” on page 340
	and/or “1,500-sheet feeder switches, sensors,
	solenoids, and PCAs” on page 343.
The tray 3 or tray 4 lifter assembly or stack position	Replace the lifter-drive assembly (500-sheet feeder)
sensor (PS802 or SR2) is defective.	or the lifter-drive assembly (1,500-sheet feeder).
	See “500-sheet feeder lifter-drive assembly” on
	page 209 and/or “1,500-sheet feeder lifter-drive
	assembly” on page 222. Replace the surface stack
	sensor (PS802 for the 500-sheet feeder, or SR2 for
	the 1,500-sheet feeder. See “500-sheet feeder
	switches, sensors, solenoids, and PCAs” on
	page 340 and/or “1,500-sheet feeder switches,
	sensors, solenoids, and PCAs” on page 343.
The paper feeder control PCA is defective.	Replace the paper-feeder control PCA. See
	“500-sheet feeder control PCA” on page 207 and
	“1,500-sheet feeder control PCA” on page 220.
The DC controller PCA is defective.	Replace the DC controller PCA. See
	“DC controller PCA” on page 181.

302 Troubleshooting Q2431-90912