Bose FreeSpace 4400 Service Manual page 70

®
FreeSpace 4400 system Error Log
The FreeSpace 4400 system Error Log is
displayed when the FreeSpace 4400 In-
staller™ software is in the Service Hardware
mode.
Contents of the Error Log
The Error Log displays FreeSpace 4400
system hardware version numbers and
records all alarms and their causes as
shown in the following example.
Hardware
Bose ®
version
-------------------------------------------------
numbers
Microcontroller: v3.0.0.18
DSP: v2.0.1.0
Peripheral: v1.0.0.10
Lower Amplifier: v1.1.8.5
Upper Amplifier: v1.1.8.5
Type of alarm
-------------------------------------------------
power-on self-test alarm (ok)
2002/12/31 23:59
Name of test
host controller test:
[OK]
Test results
host controller flash test:
[OK]
peripheral controller test:
DSP test: 1
upper amplifier test:
[OK]
Hardware configuration
The FreeSpace 4400 system hardware
version numbers appear at the top of the
Error Log listing. These are the version
numbers of the software installed in the
FreeSpace 4400 hardware at the time of
manufacture. These version numbers do not
pertain to the FreeSpace 4400 Installer™
software installed on your PC.
TROUBLESHOOTING
FreeSpace 4400 Error Log
Power-on self-test results
The power-on-self test (POST) results are
only displayed when an error has occurred.
The POST test checks the basic operation of
the FreeSpace 4400 hardware to determine
if it is capable of properly performing audio
processing and amplification. During the
POST test, five major components of the
hardware are tested.
• Host controller – The host controller moni-
tors and controls the operation of the
FreeSpace 4400 hardware. A host controller
failure will cause the message, "Power-on
self-test incomplete" to appear in the host
controller test section. The failure type for a
host controller is an SRAM address failure.
• Flash memory test – The flash memory
contains the configuration, design file, and
system event schedule. A flash failure will
cause the message, "Power-on self test
incomplete" to appear in the host controller
flash test section.
• Peripheral controller – The peripheral
controller monitors contact closures, front
panel connections and user interface con-
nections for incoming event messages. Any
failures in these areas will cause the mes-
sage, "Power-on self-test incomplete" to
appear in the peripheral controller flash test
section. If a user interface failure occurs,
check the user interface wiring for shorts.
• DSP test – The DSP performs all signal
processing and routing functions.
• Upper and lower amplifier test – The upper
and lower amplifier test determines if the
amplifiers are operating properly. An ampli-
fier failure will cause the message, "Power-
on self-test incomplete" to appear in the
upper or lower amplifier section of the POST
test results. Additional details on the exact
cause of an amplifier failure can be found in
the amplifier section of the Error Log.
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