Harman Kardon HK1680 Owners Manual - Page 8

Selection

of

power

supply

voltage

and

FM

de

-emphasis

The

hk1680

is

factory

-set

to

operate

at

120

volts

before

shipment.

If

you

move

after

purchasing

it

or

present

it

as

a

gift

to

your

friend

living

in

an

area

where

the

voltage

is

different

from

the

set

voltage,

select

the

correct

voltage

position

on

the

voltage

selection

device

according

to

the

following

procedure.

Bring

this

manual

with

hk1680

to

your

Harman

Kardon

service

station;

necessary

setting

should

be

performed

by

our

authorized

engineer.

Disconnect

the

power

plug

from

the

AC

outlet,

then

re-

move

the

bottom

panel

and

three

wood

frames

by

loosen-

ing

the

thirteen

screws

fixing

t.;

the

bottom

panel

and

three

wood

frames

in

position

(Fig.

1).

Remove

the

fuse

-

holder

with

out

of

the

Fig.

1

VOLTAGE

SELECTOR

knob

by

rotating

it

counterclock-

wise

with

a

phil

l

ips

screw-

driver

(Fig.

2).

The

VOLT-

AGE

SELECTOR

knob

can

now

be

removed

from

the

VOLTAGE

SELECTOR

indi-

cation

plate

(Fig.

2).

Insert

it

again

onto

the

VOLTAGE

SELECTOR

indication

plate

with

its

notch

placed

at

the

correct

voltage

indication;

110-120-220-240

V.

Also,

on

the

hk1680,

time

constant

of

FM

de

-emphasis

is

factory

-set

to

50μ

sec.

It

will

be

necessary

to

use

hk1680

in

the

countries

where

the

time

constant

of

FM

pre

-emphasis

is

different

from

the

set

value.

This

setting

can

be

changed

with

the

switch

shown

Fig.

3.

Remove

the

wood

panel

after

loosening

the

four

screws

on

both

side

of

it,

then

you

will

find

the

de

-

emphasis

switch

(50μ

sec./

75μ

sec.)

on

the

circuit

board

(Fig.

3).

Set

the

switch

to

position

meeting

the

time

constant

of

FM

pre

-emphasis

in

your

area.

Fig.

2

Fig.

3

Maintaining

appearance

Clean

the

wood

panel

with

a

soft

cloth

without

using

detergent.

Never

use

a

abrasive

cleaner.

Remove

dust

or

smudges

from

the

acrylic

front

window

with

diluted

glass

cleaner

appl

ied

with

a

soft

cloth.

Do

not

use

a

strong

solvent

-type

cleaner

or

ammonia.

The

hk1680

is

a

high

qual

ity

precision

instrument.

If

the

instructions

in

this

manual

are

fol

lowed

thoughtful

ly,

the

receiver

should

provide

many

years

of

musical

pleasure.

7

Harman Kardon HK1680 Owners Manual - Page 8

Selection, power, supply, voltage, emphasis, Maintaining, appearance

Page 8 highlights