Vertical SBX IP 320, Installation Manual

Page: 143 / 148

SBX IP 320 Installation Guide
Chapter 10
Troubleshooting
PROBLEM CAUSE/SYMPTOM SOLUTION
SYSTEM POWER
FAILURE
Power short circuit in some board(s) Exchange the malfunctioning board for
one in good working condition.
Dust each board with a dry cloth.
Check the PSU fuse.
Replace the PSU with an identical one.
LD1-4 LEDs on the MBU are All ON
or All OFF
SYSTEM DOES
NOT OPERATE
Power short circuit in some board(s) Check the connection of each board with
the MBU.
Check the PSU.
Check for a short circuit on the MBU or
other boards.
Press the Reset button when the DIP
switch (SW1for database protection) is in
the default position.
Bad board connection
System database not working
DKTU DOES NOT
OPERATE
Bad extension circuit Exchange the malfunctioning board for
one in good working condition.
Bad connection between the
MBU/EMBU/CHB308 and DKT Check the connection between the SLT
line and DKT on MDF, and fix any
mismatching.
Repair any broken connection between the
System and DKT.
Proximity of DKT and System Check the distance between the
MBU/EMBU/CHB308 and the DKT
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 MBU/EMBU/CHB308 board Exchange the board for one in good
working condition.
Bad connection between the
MBU/EMBU/CHB308 and SLT Check that the board connection between
the lines of the SLT and DKT on the MDF,
and fix any mismatching.
CO LINE
OPERATION
FAILURE
ANCR fail Check the U8 (Voice processing and Tone
detection device).
Bad connection Check all connections.
EXPANSION KSU
DOES NOT
OPERATE
Power ON sequence Turn on the Basic KSU after turning on the
Expansion KSU. Then press the Reset
button.
Link cable connection Check the link cable to verify the
connection and its working condition.