Simplex 4100 Classic, Manual

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Page 56 of 60
5.11 QE90 Fault Register
T
ROUBLE
Q
UESTIONS
P
OSSIBLE SOLUTIONS
R
EFERENCE
Programming
I don't get an alert phase in Auto mode, but I can
select it and it works OK in Manual mode.
Several possibilities: Alert has been turned off; cascade has been
turned off; cascade delays are not set up correctly; system has been
specifically programmed that way.
LT0088 sections 24.3 (front
panel programming) and
24.4 (serial port
programming) or 20.7 (ECM
network systems).
Tones
My alert (or other tone/signal) is too loud
compared to the other tones/signals.
The levels of the following signals can be separately adjusted for each
amplifier rack on that rack's EMUX card: PABX bus, PA Speech,
Background Music, AUX bus, Digitised Speech, Alert Tone.
LT0088 section 15.8
Servicing
A QE90 is indicating an Audio Fault on some
zones. I disconnected the speaker wiring and
shifted the speaker line end of line resistors to
directly across the transformer module terminals,
but the faults are still present and will not reset.
What else can cause this fault indication?
(a) Amplifier supervision faults. To check whether this is the case turn off
the power, and remove the amplifier card that is generating the fault.
Remove links 10 and 11 (on any amplifier type) to disable amplifier
monitoring. If the faults can be reset when the amplifier is replaced, then
the source of the fault is the amplifier supervision. Replace the amplifier
card.
(b) A Strobe module circuit fault can also cause this indication. To check
whether the source of the fault is the Strobe Module (if present), look at
red LED, LD4. Flashing = current line fault, Steady = latched line fault.
(c) The Audio Fault LEDs will also be on for affected zones if the EMUX
card controlling those amplifiers is faulty. In this case the Evacuation
System Fault LED on the left had side of the ECP Module will also be
on.
LT0088 Sections 5.2.4, 8.6
Messages
The voice messages are too quiet and are
muffled by the reverberation of the evacuation
tone.
This can be improved with hand mods to the EMUX board. You can
increase the level of the digitised speech keywords "emergency" and
"evacuate now" by decreasing the value of the tacked on R125 (over
XT1 position). Suggest connect a 56k resistor in parallel. Also decrease
the evacuation tone level by increasing the value of R45, currently 22K,
to 47K or even 56k. The alert tone pot will need to be backed off.
Blank