NEC NDA-24300 manual Refer to -16and Figure

UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE

A

Extract the DLKC card to be replaced from the TSWM.

On the new DLKC card, set the MB switch UP.

Insert the new DLKC card into the TSWM.

On the new DLKC card, set the MB key DOWN.

Flip MBR key on the active GT card. Confirm the new DLKC card functions normally.

END

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

•TSW ACT lamp on the new card is red.

•TSW ACT lamp on the new card goes OFF.

System Changeover

•Replaced DLKC: STBY to ACT

•Mate DLKC: ACT to STBY

MBR (on the active GT card)

1 2

Check the following lamp indications on the Speech Path block to which the new DLKC card belongs and ensure that they are all steady-green:

•TSW ACT (TSW cards)

•OPE/MB (DLKC card)

•MUX ACT (MUX cards)

Check the following lamp indications on the mate Speech Path block and ensure that they are all OFF:

•TSW ACT (TSW cards)

•OPE/MB (DLKC card)

•MUX ACT (MUX cards)

Refer to Figure 4-16and Figure 4-17.

Note: The changeover of speech path system can be performed also by using the CMOD command. For details, refer to Chapter 8, Maintenance Commands.

CHAPTER 4 NDA-24300

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Issue 1