NetPA AT Series User Guide • Reference Information
33
Defeatable Auto Power-down Timer
The auto power-down timer determines whether or not the NetPA AT enters standby mode.
The amplifier powers down if the input signal remains below the input signal detection
threshold for about 25 minutes.
The timer resets whenever the input signal exceeds the input signal detection threshold.
Resetting the timer starts a new 25-minute countdown until the amplifier powers down.
Resetting the timer also causes an amplifier that is already powered down to “wake up” or
power back up.
There may be times when it is desirable to bypass (disable) the auto power-down timer.
Examples of when defeating the auto power-down circuit might be required include:
•
If the amplifier is used in a paging system. When the amplifier has already powered
down, the first syllable might be cut off as the amplifier wakes up from standby mode.
•
If fhe input signal is so quiet that the level remains below the input signal detection
threshold for 25 minutes, the timer would cut the audio in the middle of playback by
placing the amplifier into standby mode.
To defeat the auto power-down timer, follow these instructions:
1.
Disconnect power from the amplifier.
2.
Remove the nine cover screws that secure the top enclosure cover to the NetPA AT.
Three screws on top and three screws on each side, as shown below.
Remove 9 Screws
emove 9 Screws
100
-24
0V x.
yA
MA
X
50-
60H
z
Ne
tPA
50
2 A
T
1
2
8Ω/
4Ω
OU
TPU
TS
CL
AS
S 2
W
IRI
NG
ST
ANDB
Y
G
REM
OTE
LINE
OU
T
AT
1
2
+6
+4
+2
0
-2
-4
-6
-8
-12
-20
+6
+4
+2
0
-2
-4
-6
-8
-
-
GA
IN
1
2
RE
SE
T
ATTENTION:
Exercise caution when removing the screws to avoid stripping the
screw heads.
ATTENTION :
Faites attention en enlevant les vis afin d’éviter d’abîmer les têtes de vis.
3.
Slide the top enclosure cover forward so that the front panel end of the cover slides
away from the rear panel end of the chassis then lift off the cover.
Summary of Contents for NetPA 1001-70V AT
Page 5: ......
