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3) When a communication line is disconnected
When a communication error is detected between the LCD display unit (NWZ-4650) and the
control unit (NCK-175) , [COMM ERROR] is displayed. Also when HBT communication error is
detected between LCD display unit and BAM or other navigational unit, [COMM ERROR] is
displayed.
4) When an abnormality of the system is detected
When the following abnormalities are detected, [SYSTEM FAIL] is displayed.
• Internal errors, such as RAM Read Error of the LCD display unit (NWZ-4650)
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