Causes for jams in Tray 2
Cause
Solution
Drive gears are damaged. Check the drive gears in the paper pickup unit.
Replace the pickup drive assembly if the gears
are damaged.
Cassette pickup clutch is damaged. 1. Disconnect the connector J24 for the
cassette pickup clutch.
2. Measure the resistance between the cable-
side connectors J24-1 and J24-2.
3. If the measured resistance is NOT about
206 ohms, replace the cassette pickup clutch.
Paper stack surface sensor is defective. Replace the cassette sensor PCB.
Pickup motor is defective. Replace the paper pickup drive assembly.
Paper pickup assembly is defective. Replace the paper pickup assembly.
Lifting plate or lifter drive mechanism in the
cassette is defective.
Replace the cassette or the lifter drive assembly.
Lifter motor is defective. Replace the lifter motor.
DC controller PCB is defective. Replace the DC controller PCB. Calibrate the
printer after replacing the DC controller. See
Calibrate now.
Table 7-10. Jams in Tray 3, Tray 4, or Tray 5 (HP Color LaserJet 5550 models only)
Causes for jams in Tray 3, Tray 4, or Tray 5 (HP Color LaserJet 5550models only)
Cause
Solution
Pickup roller, separation roller, or feed roller in
the paper cassette is deformed.
If any one of these rollers is damaged, replace
all three rollers together.
Drive gears are damaged. Check the drive gears in the paper pickup unit.
Replace the pickup drive assembly if the gears
are damaged.
Connector to the printer has poor contact. Reconnect all connectors to the printer. Replace
any damaged connectors.
Cassette pickup clutch is damaged. 1. Disconnect the connector J24 for the
cassette pickup clutch.
2. Measure the resistance between the cable-
side connectors J24-1 and J24-2.
3. If the measured resistance is NOT about
206 ohms, replace the cassette pickup clutch.
Paper stack surface sensor is defective. Replace the cassette sensor PCB.
Pickup motor is defective. Replace the paper pickup drive assembly.
Paper pickup assembly is defective. Replace the paper pickup assembly.
Table 7-9. Jams in Tray 2 (continued)
ENWW Paper path troubleshooting 337
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