Crown Micro-Tech MT-1000 Specifications download pdf (Page 19)

page 19

Micro-Tech Series Power Amplifiers

Operation Manual

CONDITION: Normal operation.

The Enable (Power) LED is on, and the ODEP LEDs

are on or flickering.

ODEP LEDs on indicates a high energy

reserve. An ODEP LED flickering means that

the energy reserve for the affected channel is dip-

ping.

CONDITION: Normal LED display but

distorted sound.

POSSIBLE REASON:

• Load is wired incorrectly or

Stereo/Mono mode switch is set incorrectly.

Check both.

• Input signal level is too high. Turn down your

amplifier level controls, or turn down the input

signal, until the clip LED goes out.

Check mixer levels and gain staging, mixer clip

lights, and pads built into microphones.

CONDITION: Normal LED display but

no sound.

POSSIBLE REASON:

• Input signal level is very low.

• Level controls are turned down.

• Input cable broken or not plugged in.

• Speakers not connected.

• The amplifier output level is so high that the

breaker has tripped. Try to identify and correct

the problem before resetting the breaker. If the

problem persists, refer the unit to an autho-

rized Crown Service Center.

• The amplifier output is shorted. First discon-

nect your speakers from the affected chan-

nel(s) one by one to determine if one of the

loads is shorted.

CONDITION: Enable LED on, ODEP

LEDs off, no sound. Low-voltage power

supply and fan are still working.

POSSIBLE REASON:

• Transformer thermal protection has activated.

Amplifier will come back on automatically

when it cools.

• ODEP reserves have been depleted and the

amplifier is about to activate protection.

• High-voltage power supply fuse or breaker has

blown.

Check for shorts in the speaker lines. Avoid loads of

1 ohm or less. Let the amplifier cool down, then

reset the breaker (Micro-Tech 2400 only).

CONDITION: All LEDs off.

POSSIBLE REASON:

• The amplifier has lost power.

• The amplifier is not plugged into the power

receptacle.

• The amplifier’s circuit breaker has tripped.

Allow the amplifier to cool; check for shorts in

the speaker lines; remove excessive loads.

Then reset the breaker.

• The amplifier has blown its internal fuse for the

low-voltage power.

supply. Refer the unit to a qualified technician.

• The power switch is off.

7 Troubleshooting

OTHER POSSIBLE CONDITIONS

TO BE AWARE OF:

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Crown Micro-Tech MT-1000 Specifications Page 19

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