6-4
6.6.5 Sound Failures
Symptoms Possible Cause Corrective Action
No hardkey or knob
sound, or hardkey or
knob sound abnormal
The key volume is set to
zero.
Select [Main Menu] → [Screen Setup >>] → [Key Volume >>]
and adjust the key volume to appropriate level.
Cable defective Check that the cable between the speaker and interface board is
properly connected.
Speaker defective Replace the speaker.
The main board failed. Replace the main board.
Power management
board defective
Replace the power management board.
No alarm sound or alarm
sound abnormal
The alarm sound is set to
zero.
Select [Main Menu]→[Maintenance >>]→[User
Maintenance >>]→enter the required password →[Alarm
Setup >>] and set the [Minimum Alarm Volume] to appropriate
level. Select [Alarm Setup] on the main menu to adjust the alarm
volume.
Cable defective Check that the cable between the speaker and interface board is
properly connected.
Speaker defective Replace the speaker.
The main board failed. Replace the main board.
Power management
board defective
Replace the power management board.
6.6.6 Battery Failures
Symptoms Possible Cause Corrective Action
Battery cannot be
charged
Battery defective Replace the battery.
Cable defective Check that the cable between the battery interface board
and power management board is correctly connected.
Power management board defective Replace the power management board.
Battery interface board defective Replace the battery interface board.
NOTE
When the battery module has a failure, it may cause problems to other components, In this case,
troubleshoot the battery module per the procedure described in the table above.
Components of the main unit are powered by the power module. In the event that a component
malfunctions, check if the operating voltage is correct.
To Next Page
Loading...
