Common Procedures; Troubleshooting A Loading Failure - Nortel DMS-100 Series Maintenance Manual

Outside plant access cabinet (opac)

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Common procedures

The following sections provide common troubleshooting procedures for

loading, returning to service, dial tone, and ringing generators.

The steps for troubleshooting a failure to load the peripheral program files

for the LCM in the OPAC are as follows:

1 Verify that no blown fuses are present. Verify that the power converters

2 Unseat the following cards:

3 Attempt to load unit 0.

4 If unit 0 fails to load, reseat the cards removed for unit 1. Unseat the

5 If both units fail to load, attempt to load the PM from another device.

6 Replace the 6X51, 6X52, and 6X53 cards in unit 0 and unseat the same

7 If unit 0 fails, replace the 6X51, 6X52, and 6X53 cards in unit 1 and

8 If both units fail to load, replace the 6X73 (slot 17 of HIE shelf).

are powered-up and supply the correct voltages.

— 6X51, 6X52, 6X53 from unit 1

— 6X50 (slot 20 of HIE shelf)

— 6X73 (slot 18 of HIE shelf)

— 2X70 (slot 22 of the HIE shelf)

following cards:

— 6X51, 6X52, 6X53 from unit 0

— 6X50 (slot 19 of HIE shelf)

— 6X73 (slot 17 of HIE shelf)

— 2X70 (slot 25 of the HIE shelf)

following procedure outlines the Attempt to load unit 1.

Attempt to load the PM from the following devices in the order listed:

— the input/output controller (IOC) disk drive

— the system load module (SLM)

— the original PMLOAD tape

cards in unit 1. Attempt to load unit 0.

unseat the same cards in unit 0. Attempt to load unit 1.

Replace the 6X50 (slot 19 of HIE shelf) cards. Attempt to load unit 0.

DMS-100 Family OPAC Maintenance Manual XPM12 and up

Advanced troubleshooting procedures 12-3