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
•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 |
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green? |
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Is AMP OUTPUT | Yes | ||
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indicator red? |
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•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 |
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Contact Bose
Customer Service.
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