ADC Telecommunications Inc. DLC1904B Benutzerhandbuch

ADCP-75-126 • Issue B • April 2002 • Section 5: Maintenance

Page 5-1

2002, ADC Telecommunications, Inc.

SECTION 5: MAINTENANCE

SYSTEM MAINTENANCE OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

1.1

Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

FAULT DETECTION AND ALARM REPORTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

FAULT ISOLATION AND TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6

TEST PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

4.1

Optical Power Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

4.2

Optical Loopback Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

5.1

Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

5.2

Remote Unit Cabinet Filter Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

5.3

Host Unit Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

5.4

Spectrum Transport Module Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

5.5

Linear Power Amplifier Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

_________________________________________________________________________________________________________

SYSTEM MAINTENANCE OVERVIEW

This

section explains the Digivance LRCS fault detection and alarm reporting system, provides

method for isolating and troubleshooting faults, and provides test and maintenance

procedures.

The Digivance LRCS requires minimal regular maintenance to insure continuous

and

satisfactory operation. Components that require regular replacement, cleaning, or testing

include

the HU and RU fans and the RU air-filter and back-up battery,

Maintenance

also includes diagnosing and correcting service problems as they occur. When an

alarm

is reported, it will be necessary to follow a systematic troubleshooting procedure to locate

the

problem. Once the source of the problem is isolated, the appropriate corrective action can be

taken

to restore service. The only internal components that can be replaced are the cooling fans

which

mount in the HU, RU, and LPA. The failure of any other component within a unit will

required

replacement of that unit.

1.1

Tools and Materials

The

following tools and materials are required in order to complete the procedures in this

section:

• ESD

wrist strap

• IR

filtering safety glasses

• Patch

cords with SC connectors

• 15

dB in-line SC optical attenuators

• Optical

power meter (1550 and 1310 nm)

• Laser

light source

• TORX

screwdriver (with T10 bit)