ND-20292

CHAPTER 5

APRIL, 1990

Al

No Internal Dial Tone To Any Multiline Terminal or SLT

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.

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.

Check AC Power and the fuse.

Good

No

v

Replace CCU

500-6

Page 591
Image 591
NEC nd-20292 manual 500-6