NEC NDA-24300 manual For Single Configuration

FAULT REPAIR PROCEDURES

(2)For Single Configuration

START

Check to see if the MUX (PH-PC36) circuit card is making poor contact.

Check by replacing the MUX circuit card with a spare.

A

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

Set the MB switch of the MUX circuit card UP.

Extract the MUX circuit card from its mounting slot and clean the contact portion.

If cleaning cannot be done, repeat insertion and extraction of the circuit card two or three times.

Set the MB switch of the MUX circuit card UP and insert the circuit card into its mounting slot.

Set the MB switch of the MUX circuit card DOWN.

Check to see if a station-to-station connection can be set up within the faulty unit.

Replace the MUX circuit card referring to Sec- tion 3.3.2, MUX Card Replacement Procedure, in Chapter 4.

Place the MUX circuit card into ACT mode by flipping the MBR key on the active GT (PH- GT09) card. Refer to Section 12.1.6, Manual System Changeover of Speech Path System, in Chapter 6.

Check to see if a station-to-station connection can be set up to identify a circuit card responsi- ble for the fault.

CHAPTER 5 NDA-24300

Page 342

Issue 1