User Manual

ADCP-75-179 • Preliminary Issue A • September 2004 • Section 4: maintenance
Page 4-10
© 2004, ADC Telecommunications, Inc.
Table 4-6. Remote Unit Fault/Alarm Isolation Diagram
AC
Power
Remote Unit Front Panel LED
Green - Powered by AC power
source
Red - Major Alarm
Off - Not powered
Software Fault/Status Indicator
Host
Unit
Green - Normal
Yellow - Minor Alarm at Host Unit - See Table 4-4. Host Unit Fault/Alarm Isolation Diagram
Red - Major Alarm at Host Unit - See Table 4-4. Host Unit Faul/Alarm Isolation Diagram
STM
Green - Normal
Yellow - Minor Alarm
Red - Major Alarm
Temperature - Over temperature
Replace STM
See Table 4-7
Problem B
Replace HU or
STM with
correct unit
Corrective Action
or Reference
Converter - Power supply
converter failure
LO Synth Lock - Local
oscillator synthesizer out of lock
Pri Rev Synth Lock - Reverse
primary synthesizer out of lock
Ref Synth Lock - Reference
synthesizer out of lock
8 Volt - Onboard 8 Volt power
supply below threshold
3.8 Volt - Onboard 3.8 Volt power
supply below threshold
Pri Rev Mux Lock - Reverse primary
phase locked loop out-of-lock
Pri Laser Fail - Reverse primary
laser failure
Hardware mismatch - Host and
Remote band mismatch
Battery Voltage - Battery
voltage below threshold
AC Fail - The AC power is off,
RU powered by back-up battery
See Table 4-7
Problem A
See battery
manual
Standby
Green blinking - Standby
Yellow blinking -
Program load
Red blinking - Test
Off - Normal
Oper Mode - Operational mode
of system
Use EMS to
change system to
required mode
Continued
20015-A