Troubleshooting - iPECS eMG80 Installation Manual

iPECS eMG80
Hardware Description and Installation Manual

9.3 Troubleshooting

Problem
Power short circuit in some
board(s)
System power
failure
LD1-3 LEDs on the MBU are All
ON or All OFF
Power short circuit in some
board(s)
Bad board connection
System does
not operate
System database not working
Bad extension circuit
Bad connection between the
MBU/EMBU/Option boards and
DKTU does not DKT
operate
Distance of DKT and System
Bad DKT
Bad MBU/EMBU/ Option boards
SLT does not
Bad connection between the
operate
MBU/EMBU/ Option boards and
SLT
CID and CPT detection fail
CO line
operation failure
Bad connection
Expansion KSU Power ON sequence
does not
operate
Expansion cable connection
Induced noise on the wire between
the System and the amplifier
Noise on
External MOH
and Paging port Excessive input level from the
external music source
Table 9.3-1 eMG80 Troubleshooting Chart
Cause/Symptom
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.
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.
Exchange the malfunctioning board for one in
good working condition.
Check the connection between the SLT line
and DKT on MDF, and fix any mismatching.
Repair any broken connection between the
System and DKT.
Check the distance between the MBU/EMBU/
Option boards and the 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.
Exchange the board for one in good working
condition.
Check that the board connection between the
lines of the SLT and DKT on the MDF, and fix
any mismatching.
Check the U8 (Voice processing and Tone
detection device).
Check all connections.
Turn on the KSU after turning on the
Expansion KSU. Then press the Reset button
Check the Expansion cable to verify the
connection and its working condition.
Make sure a shielded cable is in use as the
connection wire between the system and the
amplifier.
Decrease the output level of the external
music source by using the volume control on
the music source.
100
Issue 1.0
Solution