HP 4550 Service Manual - Page 242

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