iPECS eMG800
Hardware Description and Installation Manual
Issue 1.8
90
7 TROUBLESHOOTING
PROBLEM
CAUSE/SYMPTOM
SOLUTION
System power
failure
AC Power Fail
Assure Fuse/Breaker is operational.
Assure AC Power is delivered to AC outlet.
Check the PSU Fuse
Check LD21, LD22 on the backplane, if out, replace the
PSU.
Check +5V, +30V Fail
Verify MPB is installed.
Assure no short circuits on any board by removing one
board at a time from the KSU.
LD4 LED OFF on the MPB
Check DC Output status on MB
System does
not operate
Short circuit in some
board(s)
Check the connection of each board with the MPB by
removing one board at a time from the KSU.
Bad board connection
System database corrupted
Press the Reset button when the Dipswitch (SW1 for
database protection) is in the default position.
MPB operation
Check MPB status and SW1 position
DKT does not
operate
Bad DTIB circuit
Replace the malfunctioning board.
Bad connection between
the DSIU/DTIB and DKT
Terminals
Check the connection between the board and the DKT.
Assure proper wiring terminations.
Repair any broken connection between the Board and
DKTs.
Installation Distance of DKT
and System
Assure the distance between the board and DKT does not
exceed specs.
Bad DKT
Plug the DKT into another extension port that has been
verified as working. If the DKT still does not work properly,
replace the DKT.
SLT does not
operate
Bad DSIU/SLIB
Exchange the Extension board.
Bad connection between
the DSIU/SLIB port and SLT
Check that the connection between the board and the SLT.
CO line
operation
failure
CID/Tone Detection Fail
Check CID type assigned for CO line.
Assure CID provided from carrier.
If one CO Line or board, replace the board.
Bad connection
Check all connections.
Expansion
KSU does not
operate
Power ON sequence
Use the proper power-up sequence.
Turn on all EKSUs then power on the Basic KSU.
Press the MPB Reset button to reset the system.
Expansion cable connection
Check Expansion cable to verify the connection and
condition.
