NV5LT/NV3.5LT TROUBLESHOOTING MANUAL
RESPONDING TO ALARMS
VERSION 3.3 2016-03-10
PAGE 4.1.27
Rack #: LVPS A (or B)
Low Line
Power Supply (red)
This alarm occurs if LVPS A (U2) or LVPS B (U3) is reporting a low ac input
voltage (less than 175 V ac, higher than 90 V ac). The power supply will
limit its associated module’s output.
Rack #: LVPS A (or B)
Missing
Power Supply (amber) This alarm occurs if LVPS module A (U2) or B (U3) has been removed. Install
an operational LVPS module. The alarm may persist for several seconds after
replacing an LVPS module, before the LVPS module is recognized. If the
alarm persists after one minute, try reseating the LVPS module. This alarm
may also be caused by an ac power loss to the LVPS module. This alarm only
occurs if the system is configured to use LVPS A or B, as applicable (see
“Configuring LVPS Hardware” on page 3.2.114
) of the Operations &
Maintenance Manual.
Rack #: Module
Extraction Shutback
Power Amplifier (red) This alarm occurs if the RF power module is removed without first being
inhibited via its front panel switch. Try reseating the RF power module. If
the alarm persists, suspect a fault with circuitry on the associated module
control/interface PWB.
Rack #: Reject Fan
Volts Fail (Rej Fan V
Fail)
Power Supply (red)
This alarm occurs if the fan voltage for the module is 10% high or 10% low
from the expected value. This may be the result of a fault with the
associated circuit on the module control/interface PWB (A3).
Rack #: Residual PA
Volts (Residual PA V)
Exciter (red)
This alarm indicates that after the transmitter has turned off its RF output, it
is unable to discharge the PA volts to a level that is below 10 V. This
condition will not allow the transmitter to turn on its RF output; however
the condition will be cleared once the PA volts reaches a level that is below
10 V. If the condition cannot be cleared automatically, the transmitter will
still be allowed to turn on. This condition will typically occur with a failed
PA or power supply module. Check for associated alarms and follow the
associated troubleshooting procedure.
Rack #: +15V Fail
Power Supply (red)
This alarm occurs if the +15 V supply on the module control/interface PWB
(A3) is outside its acceptable voltage range (b13.5 and +16.5 V).
Rack #: +3.3V Fail
Power Supply (red)
This alarm occurs if the +3.3 V supply on the module control/interface PWB
(A3) is outside its acceptable voltage range (b3.0 and +3.6 V).
Rack #: +5V Fail
Power Supply (red)
This alarm occurs if the +5 V supply on the module control/interface PWB
(A3) is outside its acceptable voltage range (b4.5 and +5.5 V).
Device and
Alarm Name
(AUI, UI)
Front Panel LED
(color)
Description and Troubleshooting Action
Содержание NV3.5LT
Страница 2: ......
Страница 4: ......
Страница 8: ...NV5LT NV3 5LT TROUBLESHOOTING MANUAL PAGE 4 VIII VERSION 3 3 2016 03 10 ...
Страница 256: ...NV5LT NV3 5LT TROUBLESHOOTING MANUAL WIRING CONNECTOR LISTS PAGE 4 3 14 VERSION 3 3 2016 03 10 ...
Страница 262: ...NV5LT NV3 5LT TROUBLESHOOTING MANUAL READING ELECTRICAL SCHEMATICS PAGE 4 4 6 VERSION 3 3 2016 03 10 ...
Страница 294: ...VERSION 3 3 2016 03 10 SD 32 Figure SD 32 NAFP109B Output Power Probe and Sample PWBs ...
Страница 307: ...VERSION 3 3 2016 03 10 MD 8 Figure MD 8 NAPA31C Power Amplifier PWB Q1 ...
Страница 316: ...VERSION 3 3 2016 03 10 MD 17 Figure MD 17 NAL14 1 Input Reject Load Assembly L2 1 INPUT REJECT PWB TOP VIEW END VIEW ...
Страница 322: ...NV5LT NV3 5LT TROUBLESHOOTING MANUAL LIST OF TERMS PAGE 4 6 2 VERSION 3 3 2016 03 10 ...
Страница 323: ......