NEC nd-20292 Al No Internal Dial Tone To Any Multiline Terminal or SLT , 500-6

ND-20292
CHAPTER 5
APRIL, 1990
Al
No Internal Dial Tone To Any Multiline Terminal or SLT
Check AC Power
and the fuse.
Pull out all connectors and
printed circuit boards except
for CPU-E( ), TSW-E( ) and the
first installed ESI-E( ) in
Module 1, associated with the
programming station. Good
Rebuild system one card at a time
until problem reappears. Replace
defective card.
1 Dial Tonee
. _, PoDialTone ,
Perform 2nd mrtralrzatron. Replace TSW-E( ) and test.
If problem is notsolved, perform 1st initialization,
replace CPU-E ( ). Test system using default program.
No
v
Replace CCU
500-6