Aiphone PM-30 - Manual (Page 5)

21. Aux Input Terminals
22. Telephone Input Terminals
23. Mic-2 Input Terminals
21. Phono Input Terminals
22. Music (Tape/Tuner)
Input Terminals
23. Telephone Input Terminals
24. AUX Input Terminals
25. AUX Volume Control
26. Mic-4 Input Terminals
27. Mic-3 Input Terminals
28. Mic-2 Input Terminals
5. INSTALLATION:
Unpacking;
Upon receiving shipment, please inspect for any damage incurred in transit. If damage
is found, please notify your Aiphone distributor.
Connecting of Components:
An FM tuner, Cassette player, remote microphone, chime and other high level signal
sources may be connected to high impedance inputs \vith a single-conductor low
capacity shielded cable.
The high impedance microphone with a single-conductor shielded cable of 30’ to 60’
(10-20m) length can be plugged into the Mic. 1 input.
Make certain that all input cables are kept away from speaker cables, power cables
and power transformers.
Speaker cables must be also kept away from power cables.
Grounding the Unit .
The chassis of the unit must be grounded by using GND ( ■*■ ) terminal located on
rear side and comiected to an earth ground (eg: cold water pipe).
If additional equipment is connected to the amplifier, make sure that these chassis
are individually secured to the same ground.
6. OPERATIONS.
Over Load
If the external load exceeds the rated power, a safety circuit will respond and protect
this unit immediately. (Even if the load is short-circuited), the protective circuit will
be activated by loading 1.5 times over the rated power. If the “OVER LOAD” lamp
is illuminating or the circuit breaker on rear panel is turned off, please turn off the
power and check the output circuit. When a correct circuit has been secured, push
circuit breaker back to original position and turn power on. Make sure overload
lamp is off, otherwise re-check the otuput circuit.
Volume Control Setting
For the average input signals, the master gain control should be set to the middle.
In relation to the levels of inputs, it is recommended that the gains or losses be equally
divided between individual controls and the master control.
Tone-Controls
The separate tone controls provide boost and attenuation of bass and treble response.
The flat position is obtained when the knobs are set to mechanical center.
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