ADC Telecommunications Inc. DLC1904B Benutzerhandbuch
ADCP-75-126 • Issue B • April 2002 • Section 5: Maintenance
Page 5-5
©
2002, ADC Telecommunications, Inc.
Table 5-3. Linear Power Amplifier LED Indicators and Digital Display
INDICATOR
COLOR
DESCRIPTION
FAIL
Off
Yellow
Yellow
Indicates
if the LPA is normal or faulty.
The
LPA is normal.
Internal
fault detected in the LPA.
SHUTDOWN
Off
Red
Red
Indicates
if the LPA has an RF output or if the RF output
is
shutdown.
The
LPA RF output is on.
The
LPA RF output is shutdown.
DISPLAY MESSAGE
DESCRIPTION
ADC1940
0
0
ALARMS
NORMAL
OPERATION
The
LPA is normal.
HUNG
CHANG
ADC-1940M
Appears
every time power is turned on.
RESTART
AT STAND
ALONE
MODE
Appears
when LPA is reset.
ADC-1940S
Appears
when an alarm has turned off and the LPA is restart-
ing
after the RESET button has been pressed or the reset com-
mand
has been supplied from an external source.
PLEASE
WAIT WHILE
RESTARTING
Appears
while the LPA processor is rebooting.
DC
+12V: +12.0V
DC
+27V: +27.0V
DC
+32V: +32.0V
DC
-12V: -12.0V
Alternately
displays the voltage flow in each part of the LPA.
TEMPER
100.0 ºC
Indicates
the current temperature of the LPA heat sink.
OVER
POWER ALARM
Output
power has exceeded 100 W.
HIGH
TEMPERATURE
Alarm:
Temperature of LPA exceeds 85 ºC.
VSWR
ALARM
Reflected
LPA power exceeds 20 W.
LOOP
FAIL
General
fault occurred in the LPA loops.
FANFAIL
One
or more fans have failed.
FORCED
SHUTDOWN
The
RF ON/OFF switch is in the OFF position or the LPA was
set
in the disable mode through the EMS computer.
Alternating
FORCED SHUTDOWN
and
alarm message
An
alarm has remained for over 5 seconds.
DC
FAIL
+12V
-12V
+32V
-12V
+32V
Voltage
is outside the preset ranges:
+11
to +13V
-13
to -11V
+30
to +34V