20 DAA2 & DAX — P/N 53265:A1 8/24/2011
DAA2 Digital Audio Amplifiers Description
Indicators
Diagnostic colored LEDs indicate various conditions and troubles. Table 2.3 lists and describes
each.
DAA2 Board
LED Name Color Description LED #
RM-1 Green Illuminates steadily while the RM-1 has a channel. 1
AMP FAIL Yellow Illuminates steadily while audio amplifier failure detected. 4
ON 4 Green Illuminates steadily while analog signal is on speaker circuit 4, or while 200Hz tone is on speaker
circuit 4.
5
ON 3 Green Illuminates steadily while analog signal is on speaker circuit 3, or while 200Hz tone is on speaker
circuit 3.
6
ON 2 Green Illuminates steadily while analog signal is on speaker circuit 2, or while 200Hz tone is on speaker
circuit 2.
7
ON 1 Green Illuminates steadily while analog signal is on speaker circuit 1, or while 200Hz tone is on speaker
circuit 1.
8
TRBL Yellow Blinks when there is an unacknowledged trouble, illuminates steadily when a trouble is
acknowledged but unresolved.
9
AL BUS Red Illuminates steadily while alarm bus input is active. 10
AUX Green Illuminates while audio detected on AUX IN A. 11
FFT Green Illuminates steadily when the FFT has been granted a digital phone channel. Flashes when an
FFT on a DAA2 requests a phone channel.
12
AUDIO Green OFF - No audio signal is present.
Fast blink (4 times a second) - The DAA2 is receiving audio from the DVC.
Slow blink (once a second) - The DAA2 is playing audio from stored backup tones.
Steady - The DAA2 is playing audio from its AUX input.
13
TRBL 1 Yellow Illuminates steadily while a short is detected on speaker circuit 1. Blinks slowly (once a second)
while an open is detected. Blinks fast (4 times a second) when this speaker circuit is disabled.
14
TRBL 2 Yellow Illuminates steadily while a short is detected on speaker circuit 2. Blinks slowly (once a second)
while an open is detected. Blinks fast (4 times a second) when this speaker circuit is disabled.
15
TRBL 3 Yellow Illuminates steadily while a short is detected on speaker circuit 3. Blinks slowly (once a second)
while an open is detected. Blinks fast (4 times a second) when this speaker circuit is disabled.
16
TRBL 4 Yellow Illuminates steadily while a short is detected on speaker circuit 4.Blinks slowly (once a second)
while an open is detected. Blinks fast (4 times a second) when this speaker circuit is disabled.
17
USB Green Illuminated while communication is established on the USB port. Future Use. 18
DAP A TX Green Illuminates while data transmitted on Digital Audio Port A (wire only). Light will flicker, turning on
when activity is detected and off when it is not. Does not illuminate for fiber connections. Check
the RX and TX LEDs on the fiber option module for activity indication.
19
DAP A RX Green Illuminates while data received on Digital Audio Port A (wire only). Light will flicker, turning on
when activity is detected and off when it is not. Check the RX and TX LEDs on the fiber option
module for activity indication.
20
DAP B TX Green Illuminates while data transmitted on Digital Audio Port B (wire only). Light will flicker, turning on
when activity is detected and off when it is not. Check the RX and TX LEDs on the fiber option
module for activity indication.
21
DAP B RX Green Illuminates while data received on Digital Audio Port B (wire only). Light will flicker, turning on
when activity is detected and off when it is not. Check the RX and TX LEDs on the fiber option
module for activity indication.
22
RST Yellow Illuminates when the board is not operational and maintenance is required. Call the factory. 23
SIG SIL Yellow Illuminates when the SIG SIL button is pressed to silence local speaker outputs 1 through 4. 24
STATUS Green Blinks slowly (once a second) under normal operation, Blinks fast (4 times a second) when the
DAA2 is in bootload or diagnostic mode. Does not blink when the board is not operational or
starting up. Call the factory if this LED is off for a prolonged period of time.
25
BACKUP
FAIL
Yellow Illuminates for diagnostics of the BDA amplifier. 26
CPS-24 Power Supply Board
LED Name Color Description LED #
Table 2.3 DAA2 LED Indicators (1 of 2)