User Guide

Jams in tray 1
Table 7-9 Causes of tray 1 jams
Cause Solution
The pickup roller is dirty, worn, or damaged. Clean the pickup roller. If it is dirty after cleaning, or if it is
worn or damaged, replace the pickup roller.
The separation pad is dirty, worn, or damaged. Clean the separation pad. If it is dirty after cleaning, or if it is
worn or damaged, replace the separation pad.
The drive gears are damaged. Check the drive gears in the tray 1 pickup assembly.
Replace the pickup assembly if the gears are damaged.
The tray 1 pickup solenoid (SL102) is defective. 1 Disconnect the connector for the tray 1 pickup solenoid
from the dc controller PCA (location J79).
2 Measure the resistance between the cable connectors.
3 If the measured resistance is not approximately
160 ohms for the HP LaserJet 4200/4300, or 110 ohms
for the HP LaserJet 4250/4350, replace the tray 1
pickup solenoid.
The tray 1 pickup assembly is defective. Replace the tray 1 paper-pickup assembly. See Tray 1
paper-pickup assembly .
The dc controller PCA is defective. Replace the dc controller PCA. See Dc controller PCA.
Damaged gears in the cassette pick-up drive unit. Move the gears in the cassette pick up drive unit. If the
gears are not rotating correctly, or are damaged or worn
replace the cassette pick-up drive unit.
Dirty, worn, or deformed feed roller. Clean the feed roller. If it is dirty after cleaning, or if it is worn
or damaged, replace the pickup roller.
Defective feed roller clutch. Disconnect the connector J89. Measure the resistance
between the cable side connectors J89-1 and J89-3. If it is
not about 145 ohms, replace the feed roller clutch.
Paper-path troubleshooting 371