NEC NDA-24300 manual TSW Card Replacement Procedure

UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE

TSW Card Replacement Procedure

WARNING

Use extreme care when operating the keys on the circuit card.

START

On the active GT (PH-GT09) card, set the MBR key UP. Then, return the key DOWN.

Check the ACT mode of the mate

Speech Path System.

On the TSW (PH-SW12) card to be replaced, set the TSW MBR key UP.

A

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

System Changeover. Check the following lamp indications on the circuit cards to be affected and ensure that they are all OFF:

•TSW ACT (TSW cards)

•OPE/MB (DLKC card) Note

•MUX ACT (MUX cards)

Note: If the TSW card to be replaced represents system status #0, all the circuit cards with #0 status are totally affected. Check the whole cited cards' lamp indications. (See Figure 4-16and Figure 4-17.)

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

•TSW ACT (TSW cards)

•OPE/MB (DLKC card)

•MUX ACT (MUX cards)

TSW ACT lamp on the TSW card remains OFF.

DLKC (PH-PC20)	GT (PH-GT09)
OPE/MB	OPE/MB
MB	MB
	MBR

MUX (PH-PC36)

MUX ACT MB

TSW (PH-SW12)

TSW ACT

MB

TSW MBR

	FRONT VIEW
	Figure 4-17 LEDs and Switches for TSW Changeover
CHAPTER 4	NDA-24300
Page 274
Issue 1