NEC Electra Elite IPK II System Hardware Manual page 618

Document Revision 3
___________________________________________________________________________________
No internal Dial Tone to any Multiline Terminal or SLT
Turn system Off. Disconnect all
connectors and remove all printed circuit
boards except CPUII( )-U( ) ETU and the
first installed ESI(8)-U( ) ETU in the basic
KSU associated with the programming
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 CPUII( )-U( ) ETU and test system using
default program.
___________________________________________________________________________________
14 - 6
A1
All DC
Incorrect or No DC Voltage
Voltages
Correct?
Good
Turn system On.
Dial Tone on Multiline
Terminal on 1st
ESI(8)-U( ) ETU?
No Dial Tone
Reset ESI(8)-U10. If trouble
persists, replace ESI(8)-U( ) ETU.
Dial tone?
No
Bad
Correct AC Power
Problem.
Bad
Replace
Fuse(s).
Replace Corresponding
Power Supply.
Yes
Done.
Remove all ETUs but
one ESI, and retest.
Build system Yes
one card at a
time and
replace bad
ETU(s).
Electra Elite IPK II
Check AC Input
Power.
AC Power?
Good
PSU Fuses
F1 and F2
good?
Good
Problem
Solved?
No
Problem
Solved?
No
Replace KSU.
System Maintenance