NEC ELECTRA ELITE IPK II, System Hardware Manual, Page: 618 / 642

___________________________________________________________________________________
14 - 6 System Maintenance
___________________________________________________________________________________
Document Revision 3 Electra Elite IPK II
No internal Dial Tone to any Multiline Terminal or SLT
Incorrect or No DC Voltage
Check AC Input
Power.
All DC
Voltages
Correct?
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.
Correct AC Power
Problem.
Bad
AC Power?
Good
Bad
Good
Replace Corresponding
Power Supply.
PSU Fuses
F1 and F2
good?
Turn system On.
Dial Tone on Multiline
Terminal on 1st
ESI(8)-U( ) ETU?
Dial Tone
No Dial Tone
Replace
Fuse(s).
Reset ESI(8)-U10. If trouble
persists, replace ESI(8)-U( ) ETU.
Yes
Done.
Problem
Solved?
No
Build system, one card at
a time until problem
reappears. Replace
defective card.
No
Dial tone?
Yes
Remove all ETUs but
one ESI, and retest.
Replace KSU.
No
Yes
Problem
Solved?
Build system
one card at a
time and
replace bad
ETU(s).
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.
A1
Good