HP 4550 Service Manual - Page 222

Table 7-2 Alphabetical printer error messages (continued) DENSITY SENSOR OUT OF RANGE alternates with CLEAN DENSITY SENSOR Description: A density sensor out of range error was detected during a color calibration. DIAGNOSTICS MODE Action: The density sensor might be dirty. Inspect and clean the sensor. See Cleaning the toner density sensor (page 85). Description: Action: The extended diagnostics power-up key sequence has been No action required. entered. Refer to the diagnostics procedures at the end of this chapter. DRUM ERROR REPLACE DRUM KIT Description: Action: An error has been detected with a component of the printer Replace the drum kit. drum kit. DRUM LIFE LOW REPLACE DRUM KIT (4500) -or- DRUM LIFE LOW ORDER DRUM KIT (4550) Description: Approximately 80% of the drum's life has been consumed. DRUM LIFE OUT REPLACE DRUM KIT Action: Continue printing and order the drum kit. Drum replacement will be required when the Drum Life Out message is displayed. Description: Action: The imaging drum has reached the end of its expected life. Replace the drum kit. DUPLEXER ERROR CHECK DUPLEXER Description: An error has occurred in the duplex unit. EIO X INITIALIZING YYY alternates with DO NOT POWER OFF Action: 1. Verify that the duplex unit is correctly installed. 2. Verify that the small power cord from the duplex unit is plugged into the printer, and the power cord from the AC outlet is plugged into the duplex unit. Description: The EIO device in slot X is initializing. The YYY value will increment every 10 seconds during this process. EIO X NOT FUNCTIONAL Action: No action required. Description: The EIO slot specified does not have a card installed or is not functional. EVENT LOG EMPTY Action: No action required. Description: SHOW EVENT LOG was selected from the Information Menu, but the Event Log has no entries. Action: No action required. 220 Troubleshooting C7085-90921