Harman Kardon HK775 Bedienungsanleitung

[kardon

hk/775

harman

owner's

manual

“

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oof

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Preamplifier

Wall

Outlet

Speaker

Dene

aroha

Owner's

Manual

hk775

Your

investment

component

high

fidelity

system

indicates

you

have

greater

than

average

interest

music.

The

fact

that

your

investment

includes

Harman

Kardon

Monophonic

Amplifier

shows

your

appreciation

uncompromised

reproduction

the

music

you

enjoy.

Throughout

the

design

and

manufacture

this

unit,

made

every

effort

assure

will

meet

all

your

expectations.

ensure

continuing

high

performance,

read

this

manual

carefully

before

you

connect

and

operate

your

hk775.

Warning:

prevent

fire

shock

hazard,

not

expose

this

appliance

rain

moisture.

Connections

For

the

moment,

leave

the

POWER

LINE

CORD

(4)

the

hk775

unconnected.

Put

the

unit

the

shelf

table

where

will

installed.

Leave

enough

working

space

you

can

make

all

connections

easily.

The

hk775

requires

adequate

ventilation.

should

not

installed

cushion

rug,

and

minimum

two

inches’

(5cm)

clearance

should

provided.

(However,

hk700

series

components

may

stacked.)

Connecting

speaker

Use

two-conductor

stranded

wire

connect

your

speaker

the

power

amplifier.

Eighteen

(1.5mm?)

gauge

lamp

cord

(zip

cord)

satisfactory,

but

heavier

gauge

(16

gauge)

(2.5

3mm’)

preferable,

especially

for

distances

over

feet

meters).

Cut

cord

long

enough

reach

the

speaker.

Separate

the

conductors

each

end

the

cord

for

length

about

two

three

inches

7cm).

Then

carefully

remove

about

one-

quarter

inch

(5mm)

insulation

from each

free

end.

Twist

the

strands

each

conductor

they

are

smooth

and

tight

with

loose

strands.

Lamp

cord

usually

provides

“code”

that

differentiates

between

the

two

conductors.

conductor

may

coded

rib,

sharp

corner,

indentations

along

the

length

the

insulation.

some

cases

thin

colored

thread

molded

inside

the

insulation

one

con-

ductor.

others,

one

wire

darker

than

the

other,

the

insulation

each

conductor

different

color.

Connect

one

end

the

lamp

cord

your

speakeras

follows:

Connect

the

coded

conductor

the

speaker's

red

‘’+"'

terminal,

and

the

uncoded

conductor

the

black

‘’—"’

terminal.

Find

the

SPEAKER

CONNECTORS

(3)

the

amplifier

marked

SPEAKER.

Turn

the

red

plastic

thumbscrew

the

connector

marked

counterclockwise

reveal

the

side

opening.

Insert

the

bare

end

the

coded

conductor

into

the

opening.

Turn

the

plastic

thumbscrew

clockwise

until

the

conductor

firmly

tightened

its

place.

Unscrew

the

black

plastic

thumbscrew

the

connector

marked

and

repeat

the

same

procedure

for

the

uncoded

conductor.

Connecting

the

hk775

your

preamplifier

receiver

Your

hk775

fitted

with

type

RCA

connector.

Using

standard

type

RCA

patch

cord,

connect

the

preamplitier

output

connector

with

the

INPUT

connector

(2)

your

hk775.

Push

the

plug

all

the

way

firmly

seated,

making

good

electrical

contact.

your

control

amplifier

does

not

tyoe

RCA

connector,

consult

your

audio

dealer

for

patch

cord

with

proper

adapter.

convenience

outlet*

The

outlet

(5)

the

rear

panel

provides

power

connection

for

your

control

amplifier

other

equipment

drawing

much

500

watts.

The

outlet

unswitched

and

provides

power

regardless

whether

the

hk775

off.

Power

connection

you

have

completed

the

connections

above,

you

are

now

ready

place

the

hk775

its

permanent

position

and

plug

the

POWER

LINE

CORD

(4)

into

outlet.

turn

the

unit

and

off,

press

the

POWER

SWITCH

(8).

When

power

on,

the

POWER

indicator

(6)

will

light.

Power

level

display

The

power

output

the

hk775

can

monitored

observing

the

LEDs

the

POWER

LEVEL

DISPLAY

(9).

The

display

may

turned

off

with

the

DISPLAY

pushbutton

(10).

With

the

DISPLAY

SENSITIVITY

pushbutton

(11)

the

position

and

ohm

speaker

connected,

the

power

output

reading

will

range

from

0.1

watts

200

watts

indicated

the

left

scale.

When

ohm

speaker

connected,

reading

should

taken

from

the

right

482

scale

which

indicates

the

power

output

from

0.2

watts

400

watts.

low

listening

levels

you

may

wish

in-

crease

the

display

sensitivity

pushing

the

DISPLAY

SENSITIVITY

pushbutton

(11)

the

x0.1

position.

this

position,

the

scale

ranges

from

0.01

watts

watts,

the

482

scale

ranges

from

0.02

watts

watts.

Filters

minimize

unwanted

super-high

frequency

noises,

depress

the

ULTRASONIC

filter

pushbutton

(13).

filter

out

extremely

low

frequencies,

depress

the

SUBSONIC

filter

pushbutton

(12)

its

‘on’

position

(in).

*In

some

countries,

owing

Safety

Agency

Electrical

requirements,

this

receptacle

covered.

The

Harman

Kardon

Model

hk775

Monophonic

Amplifier

Jechnical

Manual

harman/kardon

PRECAUTIONS

Always

disconnect

the

chassis

from

power

line

when

soldering.

Turning

the

power

switch

OFF

not

enough.

Power

line

leakage

passing

through

the

heating

element

may

destroy

the

transistors.

Never

attempt

any

work

the

transistor

amplifiers

without

first

disconnecting

the

fine

cord

and

waiting

unti!

the

power

supply

filter

capacitors

have

discharged.

Replacement

for

output

and

driver

transistors,

necessary,

must

made

from

the

same

beta

group

the

original

type.

one

output

transistor

burns

out

(open

short)

always

remove

all

the

output

transistors

that

channel

and

check

the

bias

adjustment,

the

control

and

other

parts

the

network

with

ohmmeter

before

inserting

new

transistor.

All

transistors

one

channel

will

destroyed

the

base

biasing

circuit

open

the

emitter

end.

When

mounting

replacement

power

transistor,

sure

that

the

bottom

the

flange,

the

mica

insulators

and

the

surface

the

heat

sink

are

free

foreign

matter,

for

they

may

cause

transistor

failure.

Silicon

grease

must

applied

between

the

transistor

and

the

mica

insulator,

and

between

the

mica

insulator

and

the

heat

sink

for

better

heat

conduction.

Fuses

must

replaced

with

size

and

type

indicated.

Use

other

types

can

expose

components

destructive

current

levels.

ALIGNMENT

PROCEDURES

VOLTAGE

BALANCE

ADJUSTMENT

Equipment

Required:

Voltmeter

voltmeter

SPEAKER

terminals

VR401

+t10mV

IDLING

CURRENT

ADJUSTMENT

Equipment

Required:

Voltmeter

Connect

Output

Meter

Adjust

For

voltmeter

TP1

(+)

and

TP2

(—)

VR402

ALIGNMENT

PROCEDURES

POWER

LEVEL

DISPLAY

SENSITIVITY

ADJUSTMENT

Equipment

Required:

Audio

Signal

Generator

and

VTVM

Notes:

Connect

signal

source

INPUT

jack.

Press

DISPLAY

SENS.

push

button

x0.1

(button

in)

position.

Step

Signal

Source

Connect

Output

Meter

Adjust

For

ohm

dummy

load

and

VTVM

SPEAKER

terminals

Signal

source

output

level

kHz

12.65V

kHz,

—1

output

level

Topmost

LED

lights

glimmer

Fig.

—

Alignment

Points

Location

GENERAL

UNIT

EXPLODED

VIEW

™~

‘|

;

e&.

ro,

ASK

(

”

. -

147

~—

POWER

LEVEL

VER

NPC

BOARD

POWER

OUTPUT

RECTIFIER

P.C.

BOARD

“

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