iPECS-MG
Hardware Description and Installation Manual Issue 1.1
100
8. 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.
Expansion KSU PSU is not providing
power.
Assure that the BKSU power is ON and the MPB is
installed.
Assure the PSU is plugged in, that the AC power is
delivered to the outlet, and the Fuse/Breaker is
operational.
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