Audio Authority Access EZ 922, System Installation Manual

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4. After the bus test, the diagnostic program scans the active range of module addresses in every Product Group. You
will observe these module addresses counting up in the Info Display as the product group number is displayed in
each group’s Product Group window. Lowest group numbers first, and electronics groups come up before speaker
groups (e.g., 922, 945, 955, 956, (all electronics), 932, 939, (speakers).
If the numeric displays begin flashing during the module scan, then two or more modules have the same address.
Duplicate addresses are disallowed because the control panel is unable to tell two identically addressed modules apart
unless they are left and right modules in a stereo pair.
a. Make a note of the last group number displayed in the Product Group windows and the module number
shown in the Info Display find the two modules that both have this address. For example, if the control panel
is flashing, the Info Display shows 002, and the third Product Group window shows S4, you would look for
two speaker modules (932) with the same address of “Group 4, Module 02, Right.”
b. Remember that pairs of speaker modules must have the same Group and Module ID address, but must be
identified Left and Right to avoid a duplication ( See page 17. )
c. If the problem address disappears too quickly to write down, press SECURE, 88, SECURE to reboot the
system and repeat the test.
d. As each new group number appears in a Product Group
window (
Product Group, Figure 45
), the Info Display
counts up the number of modules in that group that can be
recognized. Write down the highest number reported in the
Info Display and the Group number with it. For each group,
compare the reported module tally with a physical count of
the modules.
e. If the module count in a group does not match the number
of modules you actually have, look for disconnected or
mis-addressed modules. For example in a system that has
four “E Group 0” modules, four “E Group 4” modules, and
three pairs of “S Group 4” modules:
1. The top Product Group window displays “E0” as Info
Display scans up to 4 (good).
2. The second Product Group window displays “E4” as
Info Display scans up to 5 (bad)
3. The third Product Group window ( shown in Figure
45
) displays “S4” as Info Display scans up to
3 (good).
In this case you would look for a mis-addressed, unplugged, or faulty E4 module (Electronics Group 4).
f. Also check for gaps in the series of Module ID settings in that group. For example, 0, 1, 2, 4, 5 is not
allowed and will be reported as 3 modules; in this case, the modules addressed 4 and 5 must be corrected
to 3 and 4, respectively.
Figure 45. Address Scan: In Control Panels, "E" refers to
Electronics switching modules and "S" refers to Speaker
switching modules.
Info Display Product Group
Window