The service manual for the XV-5080 describes a wrong procedure for entering test mode. The correct method is:
- Switch off device (if on)
- Hold EXIT then power on device
- Keep holding EXIT until the “SYSTEM/UTILITY” LED lights up (this takes quite a few seconds)
- Release EXIT
- Hold “SYSTEM/UTILITY” until “wait a moment” appears in the middle of the screen (also takes a while)
Navigate in the test mode using SHIFT+BANK and TONE buttons.