NEC ND-71762(E) system manual Start

MAINTENANCE PROCEDURE

(5)Diagnostic Work

START

System message 13-Gis displayed FAULT SUPERVISION once or twice.

When system message 13-Gis displayed sporadically, flip the MBR switch of the CCH circuit card UP → DOWN.

System message 13-G is FAULT displayed again

￿￿

:CCH/CCT circuit card is faulty. Paragraphs 3.3 or 3.4

System message 13-Gis FAULT SUPERVISION not displayed

When system message 13-Gis FAULT displayed cyclically.

:CCH/CCT circuit card is faulty. Paragraphs 3.3 or 3.4

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ND-71762 (E)CHAPTER 8

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Issue 2