مشخصات
Figure 1 shows the distribution of port and some components. For information about interface and adjustment potentiometer is explained as follows:
JP1 : 9-12V DC power input.
JP2 : contact microphone sensitivity required 56DB about.
JP3: audio input and output, A is a sound signal, G is negative power.
JP4: 1 foot CS to enable control input, active high; 2 feet RING input as ringtones.
JP5: connected 8 European speakers.
J1 (circuit board on the back) : When open, MIC from the external power supply; when a short circuit MIC powered by internal.
RP1 potentiometer : adjust balance and prevent howling.
RP2 potentiometer: adjust the volume.
