Specific Dch/Prt Card Is Faulty - NEC Univerge SV8500 Operation And Maintenance Manual

4.13.3 Specific DCH/PRT Card Is Faulty

(1) Check by replacing the DCH/PRT card with a spare.
(a) On DCH/PRT card, set MBR switch UP.
(b) On DCH/PRT card, set MB switch UP and extract the card from its mounting slot.
(c) Make switch setting on a new DCH/PRT card.
(d) On new DCH/PRT card, set MBR and MB switches UP and insert the card into its mounting slot.
(e) On new DCH/PRT card, set MB switch DOWN.
(f) On new DCH/PRT card, set MBR switch DOWN.
(g) Check whether the fault is still indicated.
4.13.4 Fault of DCH, DTI, and Related Flat Cable
(1) Check the connectors and flat cables between DTI and DCH.
[Check the connector.]
(a) On DTI cards, set MB switch UP. On DCH card, set MBR switch UP.
(b) Check whether the connector is correctly connected. If the connection is found improper, plug and un-
plug the connector a few times.
(c) On DTI cards, set MB switch DOWN. On DCH card, set MBR switch DOWN.
(d) Check whether the fault is still indicated.
[Check the flat cable.]
(a) On DTI cards, set MB switch UP. On DCH card, set MBR switch UP.
(b) Test the continuity of the flat cable. If abnormal, replace the flat cable with spare.
(c) On DTI cards, set MB switch DOWN. On DCH card, set MBR switch DOWN.
(d) Check whether the fault is still indicated.
(2) Check by replacing the DTI card with a spare.
(a) On DTI card, set MB switch UP and extract the card from the mounting slot.
(b) On a new DTI card, make switch setting.
(c) On new DTI card, set MB switch UP and insert the card into the mounting slot.
(d) On new DTI card, set MB switch DOWN.
(e) Check whether the fault is still indicated.
CHAPTER 5 Operation Procedure for System with PIR
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