Table 7-5 HP Color LaserJet 4550 jam locations and associated error messages Table 7-6 Explanation of alternating message 240 Troubleshooting C7085-90921 1 13.25 Paper in the paper path is too long. Check the Tray 1 area. Check the entire paper path. 8 13.10 Jam in duplex reverse unit. Inspect the rear of the duplex unit and the duplex tray. 2 13.24 Paper in the paper path is too short. Check the Tray 1 area. Check the entire paper path. 9 13.6 Jam in fusing area. Check the fuser assembly, output assembly, and duplex unit. 3 13.23 Irregular jam in the paper path. Check the Tray 1 area. Check the entire paper path. 10 13.5 Jam in fusing area.
Check the fuser assembly, output assembly, and duplex unit. 4 13.21 Door-open jam. Check the rear door, duplex cover, and rear output door. 13.20 Jam in paper feed area. Check the entire paper path. Loose toner or paper dust on the density sensor can cause this error. Clean the sensor. 11 OPEN MIDDLE 13.5 Jam. FRONT DRAWER alternates with CHECK IN REAR OF DRAWER . Check the middle front drawer. Check and pull out the fuser. 5 13.13 Jam in duplex paper feed area. Inspect the rear of the duplex unit and the duplex tray. 12 13.5 Jam: Check in rear of drawer. Check the rear of the middle front drawer. Reseat the transfer roller. 6 13.12 Jam in duplex paper feed area.
Inspect the rear of the duplex unit and the duplex tray. 13 13.1 Jam in input feed area. Check the input trays and duplex unit. 7 13.11 Jam in duplex unit. Inspect the rear of the duplex unit and the duplex tray. 14 13.2 Paper did not clear the input sensor in time. Check middle front doors Check middle front drawer. Watch pick roller to ensure it is turning. Check all rear doors Check duplex cover. Check upper rear door and rear output door. Check front duplex drawer Check front duplex drawer.