User's Manual

CHAPTER 5 NDA-24300
Page 388
Issue 1
FAULT REPAIR PROCEDURES
13.4 Fault of DCH, DTI, and Related Flat Cable
Check the connectors and flat cables
between DTI and DCH.
Check the connector. On DTI cards, set MB switch UP. On DCH
card, set MBR switch UP.
Check whether the connector is correctly
connected. If the connection is found improper,
plug and unplug the connector a few times.
On DTI cards, set MB switch DOWN. On DCH
card, set MBR switch DOWN.
Check whether the fault is still indicated.
Check the flat cable. On DTI cards, set MB switch UP. On DCH
card, set MBR switch UP.
Test the continuity of the flat cable. If abnormal,
replace the flat cable with spare.
On DTI cards, set MB switch DOWN. On DCH
card, set MBR switch DOWN.
Check whether the fault is still indicated.
Check by replacing the DTI card with a
spare.
On DTI card, set MB switch UP and extract the
card from the mounting slot.
On a new DTI card, make switch setting.
On new DTI card, set MB switch UP and insert
the card into the mounting slot.
On new DTI card, set MB switch DOWN.
Check whether the fault is still indicated.
START
END