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Issue 6
No LED or Display Indications on any Multiline Terminal
Terminate one Multiline Terminal
from the KSU Programming Station
directly to MDF and test.
Check
Station
Cabling.
Reset MBD-U10 Unit. If trouble
persists, replace B48-U( ) KSU.
Indications?
No Indication
1. If problem not solved, perform First Initialization
and test. If trouble persists go to step 2.
2. Replace B48-U10 KSU and test system using
default program.
10 - 8
A2
All DC
Voltages
OK?
Good
No
Yes
Turn system off. Disconnect
Terminal
connectors; remove all PC
Indications?
boards.
No Indication
Correct Indications
Incorrect or No DC Voltage
Correct AC Power.
Terminal
Installed?
Correct
Indication
Rebuild System one card at
a time. If problem reappears
replace defective card(s).
Check AC Input
Power.
Bad
AC Power?
Bad
Replace
PSU Fuses
Fuse(s).
F1 & F2
Replace Corresponding
Power Supply.
Yes
Problem
Done.
Solved?
Remove all ETUs and
retest.
Build system
Yes
Problem
one card at a
Solved?
time, and
replace bad
ETU(s).
Replace KSU.
System Maintenance
Electra Elite
Good
?
Good
No
No
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