11
Chapter IV Others
4.1 Precautions
1) When connecting the line, attention shall be paid to the positive and negative polarity of the
power supply.
2) When in use, it should be noted that the chassis shall be grounded well.
3) In order to ensure stable operation of the system, the time interval of continuous switching
shall be greater than 10 seconds.
4)
If the linkage control with external control panel is required, ensure that the operating
frequency is not too fast.
4.2 Fault analysis and troubleshooting
See Table 2
Table 2 Fault analysis and troubleshooting
Fault
Possible cause
Solution
Emergency
start sound
is abnormal
Misoperation
causes
the
priority
of
the
emergency
source to be lower
Perform a recording delete operation until the
deletion is complete
The speaker connected to the
bus does not have a blocking
capacitor and the terminal
board is faulty.
Disconnect
the
bus.
During
standby,
the
multimeter measures the DC voltage of the
constant voltage output terminal above 50V,
otherwise it is considered damaged.Then replace
the terminal board to confirm.
The motherboard recording
module or audio transformer
is damaged.
Replace the motherboard
Amplifier failure
Replace the amplifier
Amplifier
failure
The amplifier itself is damaged
Replace the amplifier
The
terminal
board
is
damaged, causing the power
amplifier to report a fault.
Check whether the speaker is handled with a
straight block and replace the terminal block.