Symptons & Solutions 8-1
Chapter 8: Troubleshooting
MBX IP Hardware & Installation Guide
Chapter 8
Troubleshooting
Symptons & Solutions
A list of problems and solutions that your may encounter when using the MBX IP system.
PROBLEM CAUSE/SYMPTOM SOLUTION
Hardware
System power failure AC Power Fail • Check the AC Power source.
• Check the Inlet fuse and PSU Fuse
• Check LD21,LD22 on MB/MBE -
Replace the PSU with a good one.
+5V, +30V Fail • Check MPB board was installed and
verify which board has a short circuit
by extracting the boards one by one
LD4 LED OFF on the MPB • Check DC Output status on MB
System does not operate Power short circuit in some board(s) • Check the connection of each board
with the MPB.
• Check the PSU. Check a short
circuit on the MPB 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
MPB Operation • Check MPB status and SW1
position
SLT does not operate Bad DSIU/SLIB12/SLIB24/
SLIB12C/SLIB24C
• Exchange the board with 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.
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