User Manual

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

Page 5-20

©

2002,

ADC

Telecommunications,

Inc.

Figure 5-7. LPA Fan Removal and Replacement

6. Carefully

withdraw

the

fan

assembly

from

the

LPA

until

the

wiring

harness

is

exposed

and

the

RJ-45

wiring

harness

connector

is

accessible.

7. Disconnect

the

fan

wiring

harness

connector

from

the

LPA

and

lift

the

fan

assembly

away

from

the

LPA.

8. Place

a

small

amount

of

anti-corrosion

gel

on

the

connector

of

the

replacement

fan

assembly.

9. Orient

the

fan

assembly

so

the

air-flow

arrow

points

into

the

LPA.

10. Connect

the

fan

assembly

wiring

harness

connector

to

the

LPA

internal

connector.

11. Secure

the

fan

assembly

to

the

LPA

using

the

four

retainers

removed

in

step

5.

12. Replace

the

rear

fan

assembly

using

the

same

procedure

covered

in

steps

5

through

11

except

orient

the

rear

fan

so

the

air-flow

arrow

is

pointing

away

from

the

LPA.

13. When

both

fan

assemblies

have

been

replaced,

re-install

the

LPA

in

the

cabinet.

14. Place

the

STM

On/Off

switch

in

the

ON

position

(press

I)

and

verify

that

both

fans

operate

properly.

The

front

fan

should

draw

air

into

the

LPA

and

the

rear

fan

should

blow

air

out

of

the

LPA.

15. Notify

the

NOC

or

alarm

monitoring

system

operator

that

the

system

is

going

back

online.

17549-A

PULL ON RETAINERS

TO REMOVE FAN

LPA 1940