Multi-bin mailbox troubleshooting The multi-bin mailbox standalone diagnostic tool is a troubleshooting aid that verifies how the multi-bin mailbox functions alone. The tests are designed to be used without C-link commands from the EPH controller on the printer. Switching the multi-bin mailbox to test mode 1 Turn the printer off and remove the multi-bin mailbox from the printer. 2 Move the multi-bin mailbox power supply switch to test mode (callout 1). Note Reset the power supply switch to normal mode when you finish running diagnostic tests; otherwise, the multi-bin mailbox will not work. 1 Figure 238. Multi-bin mailbox power supply test mode switch EN Multi-bin mailbox troubleshooting 477