Vertical SUMMIT IP
Hardware Description and Installation Manual
Issue 1.2
88
9.3 Troubleshooting
Table 9.3-1 SUMMIT IP Troubleshooting Chart
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.
LD1-3 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 System Clock.
Check for a short circuit on the MBU or other
boards.
Press the Reset button when the DIP switch
(SW1 for 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/Option boards 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.
Distance of DKT and System
Check the distance between the MBU/EMBU/
Option boards 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/ Option boards
Exchange the board for one in good working
condition.
Bad connection between the
MBU/EMBU/ Option boards 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 and CPT detection 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 KSU after turning on the
Expansion KSU. Then press the Reset button
Expansion cable connection
Check the Expansion cable to verify the
connection and its working condition.
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.
