Japan Radio Co. NCR-330, Instruction Manual

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4) Other checks by the self-diagnostic tests
a. Checking the receiving tone
During tests, if the equipment is normal, a soft tone will be heard. If this tone is not
heard, or if the tone is unusually loud, either the CMN-2330 receiver board or the
CDJ-2330 is likely to be malfunctioning.
b. Checking the alarm buzzer sound
During message-processing tests, if the equipment is normal, the alarm buzzer will
sound. This alarm can be deactivated by pressing the ALARM OFF switch. If the
alarm does not sound or if it is unusually loud, either the CMN-2330 receiver board
or the CDJ-2330 main processor board is likely to be malfunctioning.
After the alarm has sounded, if it cannot be deactivated using the ALARM OFF
switch, either the H-7SZJD0002A main switch or the CDJ-2330 main processor
board is likely to be malfunctioning.
c. Lamp tests
The lamps on the front panel blink for about three seconds prior to the start of the
message-processing tests.
During the tests, if the equipment is normal, all LEDs other than POWER will blink
at intervals of about 0.5 seconds. If blinking is abnormal, the H-7SZJD0002A main
switch or the CDJ-2330 main processor board is likely to be malfunctioning.
Also, the alphabetic display unit will display characters A to Z. If the display is
abnormal, the CDJ-2330 main processor board is likely to be malfunctioning.