ERICSON EDACS LBI-39153, Maintenance Manual

Page: 36 / 86

LBI-39153 TROUBLESHOOTING
36
GENERAL TROUBLESHOOTING
SYMPTOM POSSIBLE CAUSE
8. Analog Voter yellow (RCVNG) light is on
when corresponding Digital Receiver is
unplugged. 1950 Hz tone missing.
9. Occasional missed message or trouble with
special call or telephone interconnect. Check slot timing switch settings in Digital Receivers.
10. The +12V LED on RMICs is on but low
brightness.
Check +12 volt fuse F2 on backplane.
SATELLITE RECEIVER (Refer to LBI-38894 for detailed GETC Troubleshooting)
SYMPTOM POSSIBLE CAUSE
1. No control channel indication on any Satellite
Receiver. a. Control Channel not programmed correctly.
b. Check Control Channel mobile, mobile buffer board, and
multicoupler.
2. MAJOR ALARM light on at mobile buffer
board. Not receiving data from Control Channel mobile.
3. Wrong receiver is Control Channel. Incorrect switch settings.
4. All GETCs reset momentarily. Control Channel mobile has lost data.
5. All GETC lights off. a. Check GETC power.
b. Check position of GETC DIP switch S1-8.
SELECTOR TROUBLESHOOTING (Refer to LBI-39151 for detailed troubleshooting on Selector.)
SYMPTOM POSSIBLE CAUSE
1.
RDY
LED not ON. a. No power to CV
2
shelf. Check cables and 5 volt power
supply.
b. Check Flash programming.
2.
SEL/F
LED flashing erratically or at a 2 Hz
rate.
Backup Serial Link (BSL) failure. Check operation of Digital
Receivers.
3.
SEL/F
LED flashing erratically or at a 1 Hz
rate.
Phone line failure.
a. Check phone lines and RMIC modem line level settings.