Creative Engineering ROCK-A-FIRE EXPLOSION - Page 245

326 pages

Save Page as PDF

To Next Page

To Next Page

To Previous Page

To Previous Page

Loading...

A.

Audio

Problems

General

Information

In

this

section

we

will

cover

problems

relating

to

audio.

It

is

essential

and

a

real

time

saver

if

you

begin

any

procedures

for

trouble-shooting

the

Controller

and

Audio

Rack,

with

a known

good

quality

tape.

Another

good

habit

to

get

into

is

to

start

any

trouble-shooting

procedures

by

checking

the

basics

of

the

system,

like

A.

c.

power

cords,

cables

and

wiring.

Isolating

the

exact

location

of

the

cause

of

these

types

of

problems

can

be

simplified

by

the

dual

nature

of

the

Electronic

System.

The

Audio

equipment

can

be

considered

like

a

stereo

system

with

two

independent

channels

operating

simultaneously.

Therefore

we

can

literally

switch

channels

and

isolate

a

problem.

We

can

further

identify

the

particular

cause

of

the

problem

by

by-passing

individual

pieces

of

the

Audio

System

and

tracing

the

cause

through

the

process

of

elimination.

Audio

problems

are

perhaps

easier

to

localize

than

most

data

related

problems.

A common

cause

or

problem

may

effect

both

data

and

audio.

Remember

to

start

with

the

simplest

and

work

toward

the

complex.

Start

by

cleaning

the

head

and

tape

alignment

(see

manual

provided

with

deck).

Move

down

the

procedure

to

cables

and

power,

even

speaker

wires.

Try

all

the

cables

and

wiring

before

you

replace

any

components;

see

Power

Up

Procedures

on

page

1-003.

Equalizer

Take

a

reading

on

the

output

of

the

Equalizer

for

the

channel

or

channels

in

question.

Use

your

o•scope

to

read

the

signal.

If

you

had

a

signal

coming

out

of

-the

DBX

Box

and

you

do

not

have

a

signal

coming

out

of

the

Equalizer,

then

check

the

switch,

gain,

and

other

wires

leading

in

and

out

of

the

Equalizer.

If

that

is

not

the

problem,

the

Equalizer

is

bad,

replace

it

with

a new

one.

If

for

some

reason

you

need

to

reset

the

equalization,

please

refer

to

the

diagrams

that

show

the

settings

for

the

room

size

of

2000

ft.

or

less,

and

the

diagram

for

2000

ft.

or

more,

see

pages

5-017

and

5-018.

Amplifier

Check

the

amplifiers

for

output

by

looking

at

the

meters.

Warning,

do

not

change

cables

on

the

amps

or

other

audio

equipment

with

the

volume

up.

Switch

the

cables

around

to

determine

which

channel

is

bad

or

if

the

speakers

are

bad,

providing

you

have

an

output

from

the

amps.

Make

any

necessary

corrections

or

replace

the

amps

if

you

have

determined

that

they

are

bad.

It

is

unlikely

that

both

amps

will

go

bad

at

the

same

time

so

trouble-shooting

them

should

be

limited

to

exchanging

channels.