Nortel QUAA3 Mode d’emploi

QCA144 1.5 MB/S RPE Cabinet Maintenance and equipment replacement

Meridian 1

QCA144 1.5 MB/S Remote Peripheral

Equipment Cabinet Appendix A

Maintenance and equipment replacement

Document Number: 553-2601-500A

Document Release: Standard 2.0

Date: December 1994

Year Publish FCC TM

Printed in the United States of America

Information is subject to change without notice. Northern Telecom reserves the right to make changes in design

or components as progress in engineering and manufacturing may warrant. This equipment has been tested

and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules.

SL-1 and Meridian 1 are trademarks of Northern Telecom.

iii

QCA144 1.5 MB/S RPE Cabinet Maintenance and equipment replacement

Revision history

February 2, 1988 Version1.0. Thisappendixisreissuedtoremovereferencestorectifiersother

than the QRF12 –48 rectifier supplied with the cabinets. Changes to the

practice are indicated by a vertical bar in the margin next to the affected item.

December 1994 Standard, release 2.0. Updated to new template and editoral changes added.

QCA144 1.5 MB/S RPE Cabinet Maintenance and equipment replacement

Contents

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Fault detection and locating . . . . . . . . . . . . . . . . . . 3

Overlay programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Alarm indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Fault locating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Fault clearing procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Equipment replacement . . . . . . . . . . . . . . . . . . . . . 11

Equipment replacement procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

vii

QCA144 1.5 MB/S RPE Cabinet Maintenance and equipment replacement

List of figures

Figure 1

Battery cell connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 2

Expansion battery unit connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 3

Connections at rear of cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 4

Cabinet top assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 5

Shelf assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 6

Cooling unit connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

QCA144 1.5 MB/S RPE Cabinet Maintenance and equipment replacement

List of tables

Table 1

Alarm indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table 2

Fault indicators and possible causes . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Page 1 of 34

QCA144 1.5 MB/S RPE Cabinet Maintenance and equipment replacement

General

Thisappendix describes maintenance and equipmentreplacement procedures

for the QCA144 Remote Peripheral Equipment (RPE) cabinet and related

equipment.

Fault clearing for the RPE housed in the QCA144 cabinet is described in

Remote Peripheral Equipment maintenance procedures

(553-2601-500).

Page 3 of 34

QCA144 1.5 MB/S RPE Cabinet Maintenance and equipment replacement

Fault detection and locating

Overlay programs

Overlay programs are used to detect most faults in the QCA144 cabinet.

These programs are described in

Remote Peripheral Equipment maintenance

procedures

(553-2601-500).

Alarm indications

RPE related alarms are described in

Remote Peripheral Equipment

maintenance procedures

(553-2601-500). Table 1 of this appendix gives the

alarm indications and causes that are unique to the QCA144 cabinet and are

not necessarily caused by a fault in the RPE.

Fault locating

Table 2 gives a cross-reference of fault indicators and associated fault type.

Some faults may be cleared simply by using Table 1. Others are cleared by

using the appropriate procedure for the type of fault indicated in Table 1.

Fault clearing procedures

The following procedures describe how to clear faults in the cabinet.

— CE/PE breaker trips on QUX19 unit—Procedure 1

— AC BRKR breaker trips on –48 V rectifier—Procedure 2

— PE2, PE3, PE4, or PE5 breaker trips—Procedure 3

— FN fuse operates or LN LED is extinguished—Procedure 4

Page 4 of 34

Fault detection and locating

553-2601-500A Standard 2.0 December 1994

Table 1

Alarm indications (Part 1 of 2)

Type of fault

Trouble indicator

CE/PE1

LED

OFF

PE 2-5

LED

OFF

RECT

LED

OFF

LED

OFF

CE LN

XFR

CAB

INP

OFF

REM

ALARM

ATT MJ

ALARM

TTY

MSG

PE1

LN XFR

PE 2-5

LN XFR

+5 V

+12 V

+10 V

+6 V PE1

+15 V

–15 V PE1

–12 V

–10 V

–6 V PE1

–48 V PE1

–52 V

(–47 V) AL

–52 V

(–42 V) TRIP

86 V RMS

DCON

Rectifier

Note:

Individual shelf transfer if +10, –10, or –48 volts fail on shelf power converter.

(Note)

Fault detection and locating

Page 5 of 34

QCA144 1.5 MB/S RPE Cabinet Maintenance and equipment replacement

PE power from

second and

third tier PE

2–5

Manual line

transfer

–150 V

Temp

Fan

Fuse

QBL24

Table 1

Alarm indications (Part 2 of 2)

Type of fault

Trouble indicator

CE/PE1

LED

OFF

PE 2-5

LED

OFF

RECT

LED

OFF

LED

OFF

CE LN

XFR

CAB

INP

OFF

REM

ALARM

ATT MJ

ALARM

TTY

MSG

PE1

LN XFR

PE 2-5

LN XFR

Note:

Individual shelf transfer if +10, –10, or –48 volts fail on shelf power converter.

(Note)

Page 6 of 34

Fault detection and locating

553-2601-500A Standard 2.0 December 1994

Table 2

Fault indicators and possible causes (Part 1 of 2)

Fault indication Possible cause

CE/PE LED

Extinguished — Check QUX19 unit for tripped breaker.

— Check for a blown fuse on the QUAA3 and QUX19 units.

— Check connector PE1 on shelf backplane for a short or

defective wiring.

— Check for a defective QPC705 (required if bottom PE shelf is

equipped with message waiting line card).

— Check LN XFR switch on faceplate of QUAA3 unit and ensure

that it is set to 0.Wait 2 minutes for fault indication to clear.

— Press –48 V CLR button on QUAA3 unit. If fault does not clear,

replace the following items until fault clears:

• QPC705 (if equipped)

• QPC659 in PE shelf in ﬁrst tier

• QUAA3 power unit

RECT/BATT LED

Extinguished — Check for tripped AC BRKR breaker on the –48V rectiﬁer.

— Check for a blown fuse in the QBL15 battery unit (if provided).

— Check for a tripped breaker on the QBL24 battery unit (if

provided).A tripped breaker on the QBL24 unit indicates

defective batteries or a defective QBL24 unit.

PE2-5 LED

Extinguished — Check for tripped PE2, PE3, PE4, or PE5 breaker on

QUX20 unit.

— Check for extinguished LED on QPC706 or QPC659 circuit pack

on the PE shelves. Replace pack with extinguished LED.

FN LED Extinguished — Check FN fuse on QUX19 unit.

LED Extinguished on

QPC705 Power

Converter

— Press the –48 V CLR button on the QUAA3 unit.

—The QPC705 or the cable connecting it is defective. Replace the

following items until the fault is cleared.

• Replace the QPC705

• Replace the cable connecting the QPC705

Ce manuel convient aux modèles suivants

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