MAINTENANCE PROCEDURE

(5)Diagnostic Work

START

When one CCH/CCT circuit card is faulty, Trun ON the MBR key on the card, and then set the MB key

ON OFF.

When system message 13-D FAULT SUPERVISION is not displayed.

When system message 13-D

 

FAULT

: CCH/CCT circuit card is faulty.

 

is displayed.

 

 

 

 

 

 

 

 

Paragraphs 3.3 or 3.4

 

END

ND-71762 (E)CHAPTER 8

Page 97

Issue 2

Page 111
Image 111
NEC ND-71762(E) system manual On OFF, Fault