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Electra Elite
No internal Dial Tone to any Multiline Terminal or SLT
Turn system Off.
connectors and remove all printed
circuit boards except C PU B( )-U 10
and the first installed ES I(8)-U 10 in
the basic KS U associated w ith the
program m ing station .
Dial Tone
Build system, one card
at a time until problem
reappears. Replace
defective card.
Yes
1. If problem not solved, perform First Initialization
and test. If trouble persists go to step 2.
2. Replace CPUB( )-U10 and test system using
default program.
System Hardware Manual
A1
All DC
Voltages
Correct?
Good
Disconnect all
Turn system On.
Dial Tone on Multiline
Terminal on 1st ESI(8)-U10?
No Dial Tone
Reset ESI(8)-U10. If trouble
persists, replace ESI(8)-U10.
Dial tone?
No
Incorrect or No DC Voltage
Correct AC Power
Problem.
Build
one card at a
time
replace
ETU(s).
Check AC Input
Power.
Bad
AC Power?
Good
Bad
PSU Fuses
Replace
F1 and F2
Fuse(s).
good?
Replace Corresponding
Power Supply.
Yes
Problem
Done.
Solved?
Remove all ETUs but
one ESI, and retest.
system
Yes
Problem
Solved?
and
bad
Replace KSU.
Issue 6
Good
No
No
9 - 7
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