Common Problems; Communications Port Error; No Audio In Zone - Bose FreeSpace E-4 Owner's Manual

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
No
SOURCES indicators
green?
Yes
Yes
Is AMP OUTPUT
indicator red?
No
Are the
No
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.