Table of Contents
Advertisement
Electra Elite
No Internal Dial Tone to any Multiline Terminal or SLT
Turn system Off. Disconnect all
circuit boards.
Dial Tone
Rebuild system, one
card at a time until
problem
reappears.
Replace
defective
card.
Dial Tone
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.
System Hardware Manual
A1
DC
Voltages
Correct?
Good
Turn system On.
Dial tone on Multiline
st
Terminal on 1
ESI(8)-U( )
(MBD-U10 Unit)?
No Dial Tone
Reset ESI(8)-U( ) ETU. If trouble
persists, replace B48-U10 KSU.
Dial Tone?
No Dial Tone
Incorrect or No DC Voltage
Correct AC Power
Problem.
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.
Issue 6
Good
?
Good
No
No
10 - 7
Advertisement
Table of Contents
