Bose E4 manual Common problems, Communications port error, No audio in zone

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8.0 E4 System Troubleshooting

8.4 Common problems

8.4.1 Communications port error

When you receive the communications port error dialog, the FreeSpace® Installer™ software was not able to locate an E4 system on the COM 1 port.

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?

This normally occurs due to one of three reasons:

The PC and E4 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 E4 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.

No audio in zone.

Are the AUDIO

No

SOURCES indicators

 

 

 

 

green?

 

 

 

Yes

 

 

 

 

 

 

 

 

 

Is AMP OUTPUT

Yes

 

 

indicator red?

 

 

 

No

 

 

 

 

 

 

 

 

 

Make sure that the audio sources are connected to the E4 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.

Are the

No

 

See amplifier fault troubleshooting

AMP OUTPUTS

indicators green?

 

 

 

section for course of action.

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contact Bose

Customer Service.

68 of 80

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Contents FreeSpace E4 Series II Business Music System Declaration of Conformity Contents Contents Introduction E4 System TroubleshootingE4 hardware indicators System faultAMP Output Amplifier faultDirect input is active No Standby and System indicatorsInput clipping Power-on self-test results FreeSpace E4 system Error LogContents of the Error Log Hardware configurationAmplifier alarms using output voltage and current Amplifier alarmsInput and output alarm history Solving faults reported in the Error LogNo audio in zone Common problemsCommunications port error Bad sound in a zone User interface keypads do not operate correctlyTechnical assistance Auto Volume does not calibrateReporting software bugs and issues Customer supportFor Windows NT Restoring E4 Microcontroller Code Restoring E-4 Microcontroller Code Bose Product Sales Conditions
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E4 specifications

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