Bose FreeSpace E-4 Benutzerhandbuch - Seite 10

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8.4 Common problems

8.4.1 Communications port error

When you receive the communications port error dialog, the

FreeSpace

system Installer™ software was not able to locate an

E-4 system on the COM 1 port.

This normally occurs due to one of three reasons:

• The PC and E-4 are not connected via a "straight-wired" serial

cable.

• Another software application has control of the serial port.

Applications such as the Palm OS, or other audio applications

control the serial port while they are open. Close these applica-

tions and click the Try Again button.

• The E-4 is connected to another communications port. If this is

the case you should select the appropriate COM port and click

the Try Again button.

Programmer's Note: Before dismissing the "Choose

COM port" dialog, select the COM 2 port and click Try

Again. Not doing this will cause the COM 1 port to be

locked.

8.0 E-4 System Troubleshooting

67 of 76

8.4.2 No audio in zone

If the system is powered on and operational, but there is no

sound, check the following:

• Do the front panel LEDs indicate normal operation?

• Is the source operating?

• Is routing correct?

• Is output gain correct?

• Is the output gain muted?

• Is cabling correct?

No audio in zone.

Are the AUDIO

SOURCES indicators

green?

Yes

Is AMP OUTPUT

indicator red?

Are the

AMP OUTPUTS

indicators green?

Yes

Contact Bose

Customer Service.

• Make sure that the audio sources

are connected to the E-4 LINE in-

puts and that there is an input sig-

nal from the source.

• Using the Installer™ software,

check that the input gain is raised.

• Make sure the source is on.

The amplifier is in "protect" mode.

Disconnect the load and see if the

output indicator changes to green.

If so:

• Check for a short in the output

line,

• Make sure no small strands of

wire are touching other wires,

• Make sure speakers are function-

ing correctly, or

• Using a voltmeter, check for a

voltage drop in the power line

when amplifier is being driven ex-

cessively hard.

See amplifier fault troubleshooting

section for course of action.