Crown PIP-ISO Información técnica descargar pdf (Pagina 20)

Macro-Tech 600/1200/2400 Power Amplifiers

Page 20

The table in Figure 4.2 shows the possible states for

the

ODEP

and Signal/

IOC

indicators. It also describes

the conditions that may be associated with the differ-

ent indicator states. The Enable indicator will be off with

the first indicator state, “There is no power to the ampli-

fier.” All other conditions in the table will occur with the

Enable indicator turned on. It is important to note the

possible states of the indicators in the rare event that

you experience a problem. This can greatly aid in de-

termining the source of problems. Please contact your

local Crown representative or our Technical Support

Group for futher assistance.

Fig. 4.2 Macro-Tech ODEP and Signal/IOC Indicator States

ODEP

SIGNAL

IOC

OFF

There is no power to the amplifier and all indicators are off, including the Enable light.

Possible reasons: (1) The amplifier’s Enable switch is off. (2) The amplifier is not plugged into the power

receptacle. (3) The AC circuit breaker has been tripped. (4) The amplifier’s low-voltage power supply

fuse has blown.

Indicator Status Amplifier Condition

ODEP

SIGNAL

IOC

OFF

Normal operation for a channel with NO audio output. Possible reasons: (1) There is no input signal.

(2) The input signal level is very low. (3) The channel’s level control is turned down.

ODEP

SIGNAL

IOC

Normal

Normal operation for a channel with audio output. The

ODEP

indicator will remain at full intensity

to show that there is reserve thermodynamic energy, and the Signal/

IOC

indicator will flash with normal

intensity to show that the channel has audio output.

ODEP

SIGNAL

IOC

Bright

The channel’s output is exceeding 0.05% distortion. The input signal level is too high and

IOC

reporting either an input overload or output clipping.

ODEP

SIGNAL

IOC

OFF

Bright

The amplifier channel is in standby mode. Possible reasons: (1) A

P.I.P.

module like an

IQ–P.I.P.–SMT

has turned off the channel’s high-voltage power supply. (2) The amplifier has just been

turned on and is still in the four second turn-on delay. (3) The DC / low-frequency protection circuitry has

been activated. (4) The fault protection circuitry has been activated. (5) The transformer thermal

protection circuitry has been activated.

ODEP

limiting has been activated. Possible reasons: (1) The amplifier’s air filters are blocked and

need to be cleaned. (2) There is insufficient cooling because of inadequate air flow or air that is too hot.

(3) The load impedance for the channel is too low because the output is shorted or the amplifier is

driving too many loudspeakers for the selected stereo/mono mode. (4) The amplifier channel is

continuously being driven to very high output levels.

ODEP

SIGNAL

IOC

OFF

Normal

ODEP

limiting is about to begin. Possible reasons: (1) The amplifier’s air filters are blocked and need

to be cleaned. (2) There is insufficient cooling because of inadequate air flow or air that is too hot.

(3) The load impedance for the channel is too low because the output is shorted or the amplifier is

driving too many loudspeakers for the selected stereo/mono mode. (4) The amplifier channel is

continuously being driven to very high output levels.

Channel 2 only: The amplifier is in Parallel-Mono mode. The channel 2 Signal/

IOC

indicator always

turns on to full brightness whenever the amplifier's stereo/mono switch is set to Parallel-Mono mode.

A channel’s fuse has blown or breaker has tripped. Transformer overload can cause a channel’s

internal fuse for its high-voltage supply to blow in a

Macro-Tech 600

1200

, and it can

cause the channel’s circuit breaker to trip in a

Macro-Tech 2400

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