Furuno CSH-53 - Manual (Page 91)

13-5
Interface Unit CS-120A Self Test
1. Open the cover of the interface unit.
2. Find DIP switch DP-1 on the lone circuit board. Turn switch
#6 on to start the self test. The results of the check appear on
the digital display beside the DIP switch.
3. Turn the DIP switch off after completion of the test.
67
8
67
8
Turn #6 on. Digital
display
If the readout shows "0" the unit
is functioning properly. If it is
not working properly any of the
following nine numerals or six
alphabets appear.
Figure 13-8 Interface unit CS-120A, cover opened