Furuno DS-60 Operator's Manual page 68

6. MAINTENANCE
6. Press the DISP key to test the Transceiver Unit DS-620.
Description of test results for the Transceiver Unit DS-620
• The results of the ROM and RAM check are shown as "OK" or "NG". For any
"NG", reset the power and try the test again. If the "NG" condition continues,
contact your dealer for instruction.
• "DS-610" shows the results of the connection test with the DS-610. OK for nor-
mal, or no indication for error.
• "B Volt", "+5V" and "+12V" show the voltage of the related circuits.
• The program number of the starter program, booter program, main program FP-
GA1 program and FPGA2 program are shown.
• "B1 NL", "B2 NL" and "B3 NL" mean the noise level for beam 1 to beam 3.
7. To quit the self test, press the MENU/ESC key three times.
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