Furuno FR1500 Mk3 - Manual (Page 42)

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Video signal check
Figure 4-9 Video signal check
Diagnostic test
Conduct the diagnostic test (keying sequence: [MENU] [0] [0] [0] [0] [2] [2] to
conduct the self test. If NG appears for any ARP item recheck connections on the
ARP-17 Board. After confirming the diagnostic test close the cover.
Figure 4-10 ARP test results