Majorcom: PX-4120 Operation Manual - page 8
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4.
OPERATION
For the four output terminals, please only use the COM and one of the others. When using 70V and
100V, the speaker must be with transformers. Moreover, and the total power of the speakers should
be less than the rated output power.
5.
MUTE FUNCTION
Mute Priority Description: MIC1 highest priority telephone remote MIC. Telephone and MIC1
priority can be reset via the rear panel short circuit terminals. Normally, MIC1 is with the highest priority.
6.
TROUBLE SHOOTING
Fault phenomenon
There is no sound output
when the line connection is good
The cause of the problem
1.No electricity or plug contact undesirable
2.The fuse was burn out
3.The volume is not open
4.No input signal
Normal startup, the alarm triggered
1. Load short circuit or damaged
2. Power supply voltage is not stable, too high or
too low
3. Overload
In the normal use of all of a sudden
no sound output
1. Temperature is too high, the machine in
temperature protection
2. Loose cable connection
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