Whenever the Printer is switched ON, it automatically performs
a series of internal self tests and mechanical initialization sequences.
If any of the parts fail, a system error will appear and you should
consult » System
Error Codes.
Entering Service Menu at Power Up - Only for Onsite Repair
If the Printer fails to initialize completely because of a System
Error and you need to use the Service Menu (Service Tests and Utilities),
the Printer can be powered up in Service Mode by pressing the Up
and Enter keys while switching the Printer ON.
This will give you access to some of the Service Tests and Utilities
without having to complete the System Initialization (if you perform
some of the tests, they will need to initialize the relevant part
of the System).
