GAI-Tronics PMA-300 Посібник - Сторінка 11

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Model PMA-300 300 Watt Central Amplifier

Operation

This section describes the simple operation of the Model PMA-300 Power Amplifier.

1. Push the front panel main ac POWER rocker switch to the "ON" position.

2. With no unit adjustments required, apply the appropriate audio signal applied to LINE IN.

3. The audio signal is amplified and is heard in the speakers.

Front Panel Status Indicators

The front panel status indicators show the user, at a glance, the following operating status conditions of

the amplifier:

Function

Description

Illuminates BLUE when the internal power supply circuitry supplies are OK and

functioning when the power switch is ON.

Illuminates YELLOW when external AUX power (48 V dc) is applied, if equipped.

OHEAT

Illuminates RED when the amplifier's heatsink thermostat has opened due to excessive

heat. (approximately 75-80ºC).

Illuminates RED when the internal main bus voltage fuse (F1) opens on the Power

FUSE

Supply PCBA.

OLOAD

Illuminates RED when the Speaker Out signal has exceeded 300 watts.

ALARM

Illuminates RED when an ALARM condition exists such as main bus voltage fuse (F1)

opens, or OHEAT occurs.

Illuminates RED when the Speaker Out signal starts to exceed 300 watts.

OUTPUT

PEAK

7 SEGMENT

Illuminates in 3 dB increments depending upon the OUTPUT signal level.

Range is –18 dB to 0 dB, as related to 300 watts (full out).

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