Vertical MXB IP, Hardware Installation Manual

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Symptons & Solutions 8-2
Chapter 8: Troubleshooting
MBX IP Hardware & Installation Guide
PROBLEM CAUSE/SYMPTOM SOLUTION
DKT does not operate Bad DTIB circuit - Exchange the malfunctioning board
by one in good working condition.
Bad connection between the DSIU
/DTIB12/DTIB24/DTIB12C/DTIB24C
and DKT Terminals - Check the connection between the
SLT and DKT line on MDF, and fix any
mismatching.
- Repair any broken connection
between the Board and DKTs.
Installation Distance of DKT and System - Check the max. distance between the
DSIU/DTIB12/DTIB24/DTIB12C/
DTIB24C 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 DSIU/SLIB12/SLIB24/
SLIB12C/SLIB24C - Exchange the board by one in good
working condition.
Bad connection between the
DSIU/SLIB12/SLIB24/
SLIB12C/SLIB24C 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 CID/Tone Detection Fail - Check the U12/U63 (Voice
processing and Tone detection device)
and MPB.
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
Expansion cable connection - Check Expansion cable to verify the
connection and its working condition.
2
nd
KSU, 3
rd
KSU PSU OFF
- Check 1st KSU for Power OFF
Noise on External MOH
and Paging port Induced noise on the wire between the
System and the amplifier - Make sure a shielded cable is in use
as the connection wire between the
system and the amplifier.
Excessive input level from the external
music source - Decrease the output level of the
external music source by using the
volume control on the music source.
Release 1.0 November 2010