Bose FreeSpace E-4 Instrukcja obsługi - Strona 5

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8.2.3 Amplifier fault

The AMP OUTPUT LEDs work in pairs (1 and 2, 3 and 4) and indi-

cate the operating status of the four ampliﬁer output channels.

AMP OUTPUTS

SYSTEM

STATUS

AUDIO SOURCES

DIRECT

INPUT

When an ampliﬁer fault occurs, the ampliﬁer mutes its outputs

and indicates an error. After a short period of time the ampliﬁer

will try to operate again. If the fault condition persists, the ampli-

ﬁer will attempt to restart six times, after which it will remain

muted.

Ampliﬁer faults are typically caused by a shorted speaker line, an

overdriven ampliﬁer, or a saturated output transformer.

• To check for a shorted speaker line, remove the speaker con-

nection from the ampliﬁer channel. If this resolves the problem,

locate and correct the shorted loudspeaker line.

• To make sure that you are not overdriving the E-4 output,

change to a different source. If the problem no longer exists,

use the Installer™ software to reduce the input level of the

original source that was overdriving the output.

• To make sure an output transformer is not being saturated,

check to see if the correct speaker EQ setting is selected.

If none of these actions solve the problem, read the instructions

in the following ﬂow chart or check the error log using the

Installer™ software.

8.0 E-4 System Troubleshooting

Check for

• Shorted wiring

• Overdriven amplifier

(reduce output gain)

• Transformer saturation

STANDBY

• Entry in Installer™ soft-

ware error log

AMP OUTPUT

indicators are red

Has the E-4 unit

shut down during

operation?

Is SYSTEM

STATUS indicator

green?

Yes

Does the Installer™

software Error Log list

any amplifier

faults?

Contact Bose

Customer Service.

62 of 76

• Check the number of loudspeak-

ers connected to the E-4 unit.

Verify that the total sum of loud-

Yes

speaker taps connected to the

E-4 unit does not exceed 400W.

• Verify that there are no shorts on

the speaker output lines.

• Switch POWER to OFF.

• Disconnect the load and switch

POWER to ON.

• Verify that there are no shorts on

the speaker output lines.

Yes

See amplifier fault troubleshooting

section for course of action.