HP Color LaserJet 8500 Service Manual - Page 480

Note Power-up sequence test 1 Push in and hold the multi-bin mailbox interlock switch. The multibin mailbox begins a power-up test. • All the motors in the multi-bin mailbox start working, and the delivery head assembly moves up and down the multi-bin mailbox twice, scanning to determine that all the output paper bins are properly installed. • At the end of the power-up test, the flipper motor remains working and waiting for feeding paper. 2 Check the user status LED on the front and the three service LEDs on the back side of the multi-bin mailbox. If the power-up test is successful, the user status LED remains green and the middle service LED shows solid red. The other two service LEDs remain off. 3 If the service LEDs are blinking in a pattern, indicating an error code, a problem exists (table 49 on page 479 lists the error codes indicated by the blinking pattern). Paper path test Use only supported media types for the paper path test. 1 Manually feed paper through the input paper guide. • The paper passes across the flipper assembly and moves down to the bottom paper bin through the transport belt system via the delivery head assembly. 2 Feed several pages, one at a time, through the input paper guide. If the paper path test is successful, reinstall the multi-bin mailbox. 3 If a problem exists, the service LEDs blink in a pattern, indicating an error code (table 49 on page 479 lists the error codes indicated by the blinking pattern). 478 Chapter 7 - Troubleshooting EN