Harman Kardon A200 Owners Manual - Page 4

OUTPUT

A

receptacle,

ma

rked'OUTPUT"

will

be

found

at

the

rear

of

the

cb

.

A

shielded cable

of

the

shortest

practical

length, which may

be

pur-

chased

at

any

electronic

supply

store,

should

be

used

to

connect

from

this

receptacle

to

the

tuner

input

receptacle

on

the

amplifier.

PISMO

INPUT

A

receptacle

d

"PIIGNO

INPUT'

will

be

found

at

the

rear

of

the

ch

•

.

A

crystal

pickup,

or

the

output

of

a

mimetic

pickup

Pre-

amplifier. may

be

plugged

into

this

receptacle.

The

function

switch

of

the

Guide will

then

serve

to

connect

the

phonograph

or

either

FM

or

MI

broadcasts

to

the

amplifier

input.

This

feature

is

particularly

useful

when

the

Guide

is

used

to

convert

a

high

quality

phonograph

into

a

radio

-

phonograph

comb'

.

VENTILATION

All

electrical

equipment

generates heat which

oust be allayed

to

escape.

Although

the

Guide

is well

lated

in itself,

sufficient

space

should

be allowed around

it

to

permit

free

air

floe. If

it

is

placed

in

a

bookcase,

it

should

be

located

well

toward

the

front,

to

provide

as

such

clearance

as

possible

at

the

rear.

Do

not

put

books

or

other

objects

on

top

of

the

Guide. This

would

reduce

the

'lotion

and

result

in

sharply

reduced

component

and

tube

life.

OPERATION

CONTROLS

The

Harman-Iardon

Guide

has

only

two

operating

control..

The

Function

Switch

(at

the

left)

serves

to

turn

the

power

off in its

extreme

counterclockwise

position.

In

any

other

posi-

tic*,

the

parer

is

turned

on.

This

switch

also

selects

among

AM

reception,

FII reception

and

phonograph.

The

Tuning

Knob

(at

the

right)

is

used

to

tune

to

the

desired

station,

and

also

operates

as

a

momentary

AFC

defeat.

AUTCNATIC

FREQUENCY

CONTROL

(AFC)

FIN

Broadcasting,

by

its

very

nature,

elimi-

nates

almost

all

natural

and

man-made

However,

the

characteristics

of

FN

which

make

this

possible

also

make

for

problems

'n

tuning.

The

HARMAN-KAM:KW

Guide

incorporate,

an

ef-

fective

Automatic

Frequency

Control

(AFC)

cir-

cuit

that

ov

ercomes

these

problems

and

proper

tuning

even

if

the

manual

g

is

not

accurately

done.

The

following

experiment

will

lead

to

an

und

adios

of

AFC,

and

the

fuller

enjoyment

of

the

Guide.

First,

tune

across

the

odd

sale.

Note

how

the

stations

'pop'

into

place.

Now

tune

to

any

station,

preferably

one

with

a

musical

program

,.

Press

the

tuning

knob

in

to

defeat

the

AFC,

snd

tune

slwly

through the

station

inn left

to

right.

Notice

that

there

are

three

points

where

the

station

sounds

clean,

interspersed

with

points

of

distorted

sound.

The

saddle

clean

-

sounding

point

is

the

proper

tuning

position

for

the

best

tone

quality

with

minimum

noise

end

interference.

With the

knob

depressed, detune

the

station

so

that

the

sound

is

distorted.

Re-

lease

the

tuning

knob

to

reactivate

the

AFC,

and

notice

how

the

sound

clears

up.

Actually,

the

tuning

has

been

readjusted

by

the

operation

of

the

AFC

circuit,

which

auto.

socially

ramie,

the

electronic

circuits

to

the

center

of

the

station

channel.

The

AFC

circuit

of

the

Harman-Kardon

Guide

performs

the

further

function

of

overcoming any

tendency

of

the

tuning

to

drift.

In

order

to

take

maximum

advantage

of

the

benefits

of

APC,

it is

suggested

that

fine

tim-

ing

be

done

with

the

knob

pressed

in.

When

the

knob

is

released

AFC

will

improve

this

careful

tuning

by

s

factor

of

10

to

I.

Th

is

procedure

is

especially

recommended

in

thee.,

cases

where

a

weak

station

is

found

close

to

a

strong

station.

Under

those

conditions,

oho

AFC

not

tend

to

reach

for

the

strong

station,

and

Completely

skip

over

the

weak

station.

If

the

weak

station

is

tuned

with

the

AFC

defeated,

the

AFC

will

lock

it in,

after

the

knob

is

released.

MAINTENANCE

AND

REPAIR

In

some

installations,

hum

ma

y

be

encountered

due

to

a

voltage

difference

between

the

ampli-

fier,

tuner

and

d

changer

chassis. This

my

be

eliminated

by

reversing

one

or

all

of

the

AC

power

plugs.

Simply

reverse

one

at

a

time

until improvement

is

experienced.

Due

to

the conservative design

and

high

quality

components

of

the

Guide,

no

routine

maintenance

other

than

yearly

tube

-testing

is

required.

Should

trouble

develop,

however,

only

the

most

qualified

serviceman

should be

employed,

as

special

equipment

and

'

is

required

to

properly

service

high

fidelity

equipment.

This

instructica

booklet

ad

other

information

needed

by

your repairman.

It

should

be kept

available

for

his

use.

LIST

OF

REPLACEABLE

PARTS

DESCRIPTION

NARMAN-IIARDON

PART

NUMBER

LIST

PRICE

Power

Transformer

PT20174

6.00

MI

IF

Transformer

G124605

1.50

PH

Discriminator

GT24601

2.10

AN

IF

Transformer

GT24610

1.30

K

Trim

Coil

Clip

Z24614

.05

Gang

Condenser

J14710113

9.00

AM

Janet

ick

GL47127$

3.50

Electrolytic

Cap.

40.40.405150

JE2063%

2.20

RF

Trimser

1-10

Mr

J9206$2

.30

Function

Switch

ER27742

2.50

Dial

Glass

P27749

1.25

Dial

Glass

Clip

Z24774

.05

Pointer

224773

.39

Display

panel

P24747

4.7$

Escutcheon

C24750

6.7$

Cage

C471071

7.50

Knob

125790

.If

Instruction

Sheet

.75

Loopstick

Tuning

Ring

P21210

.15

Selman.

Rectifier

2:20690

1.50

Broadcast

OSC

Coll

GL471251

.75

Harman Kardon A200 Owners Manual - Page 4

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