Furuno Navtex NX-700-A, Руководство по обслуживанию

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7.1 Self Test
7-8
Alarm Buzzer Test
8. A continuous alarm beep is outputted in the test. If the test result is “Pass”, press the
[ENT] key three times, and if the result is “Fail”, press the [PRINT] key three times
and proceed to the next Contact Signal Test.
Alarm Buzzer Test
Alarm buzzer test result
Pass Push [ENT] 3 times.
Fail Push [PRINT] 3 times.
Contact Signal Test
9. Check if the alarm output between #1 (ALM-H) and #2 (ALM-C) of J403 (WAGO)
on NX-7001 is turned on and off at the every second. If the test result is “Pass”, press
the [ENT] key three times, and if the result is “Fail”, press the [PRINT] key three
times and proceed to the next Clock Test.
Contact Signal Test
Contact signal test result
Pass Push [ENT] 3 times.
Fail Push [PRINT] 3 times.
Clock Test
10. This is a check for clock frequency of the CPU. If the clock frequency is not
correctly set, receiving becomes impossible because synchronization with received
signals cannot be maintained.
Check that the output frequency (5 Vp-p) at U3-#2 (TEST SIGNAL) of the RCV
board on NX-7001 is within 960 kHz + 1.9 kHz.
If the test result is “Pass”, press the [ENT] key three times, and if the result is “Fail”,
press the [PRINT] key three times and proceed to the next Output Test Result.
Clock Test
Clock test result
Pass Push [ENT] 3 times.
Fail Push [PRINT] 3 times.
Alarm beep generated
when a message A, B,
D or L is received.