Harman Kardon 630 Bedienungsanleitung

The

Harman-Kardon

Model

630

AM/FM/Stereo

Solid

State

Receiver

Technical

Manual

harman

/kardon

CIRCUIT

BOARD

CIRCUIT

BOARD

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03J91S-W4

STEREO

(MPX)

CIRCUIT

BOARD

Test

Point

composite

signal

Input

(green)

from

Muting

Board

(6)

+B5,

14V

(orange)

Audio

Output

R-ch.

Func.

switch

{2R

-2}.

(green)

chassis

ground

{black}

Audio

Output

L-ch.

Func.

switch

{2R

-8).

{biue)

Stereo

Beacon

Lamp

(yellow)

Mode

switch

(violet)

board

(9)

(light

blue).

EQUALIZER

AMPLIFIER

CIRCUIT

BOARD

R-ch.

Output

Func.

switch

thru

R918

(green)

R-ch.

Phono

Input

(white)

+B3.

21V

{brown)

chassis

ground

{black}

L-ch.

Phono

Input

(yellow)

L-ch.

Output

Func.

switch

thru

R917

(blue)

ALIGNMENT

PROCEDURE

STEREO

ALIGNMENT

PROCEDURE

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

line

cord

and

waiting

until

the

power

supply

filter

capacitors

have

discharged.

Replacement

for

output

and

driver

transistors,

necessary,

must

made

from

the

same

beta

group

the

origina!

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

ohm-meter

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

transistors

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.

INSTRUMENTS:

Signal

Generator,

VTVM

and

Oscilloscope.

NOTE:

The

Amplifier

must

completed

before

attempting

this

FM-Stereo

Alignment.

Poor

alignment

will

result

poor

Multiplex

Adjustment.

Set

Separation

Adj.

VR302

{on

MPX

board)

max-position

before

starting

this

procedure.

Set

Selector

switch

‘‘FM

STEREO”.

Connect

Stereo

Generator

antenna

terminals.

STEREO

GENERATOR

OUTPUT

INDICATOR

CONNECTED

mower

)

ADJUST

FOR

MODULATION

DEVIATION

2—

Oscilloscope

L301,

302

Maximum

Amplitude

Test

Point

and

303

scope.

(on

MPX

board)

VR301

Stereo

Beacon

Lamp

just

comes

on.

Pilot

Oscilloscope

and

VTVM

L302

Maximum

and

undis-

Signal

70%

Left

channel

TAPE

torted

sine

wave

OUT

jack.

scope.

Oscilloscope

and

VTVM

Minimum

reading

Right

channel

TAPE

VTVM.

OUT

jack.

Same

step

Repeat

steps

and

until

further

improvement

possible.

And

adjust

Separation

Adj.

VR302,

necessary.

MUTING

ADJUSTMENT

INSTRUMENTS:

Signal

Generator

and

Oscilloscope.

Set

Selector

switch

“FM”

position.

OUTPUT

INDICATOR

CONNECTED

Oscilloscope

TAPE

OUT

19KHz

Pilot

signal

only

Composite

KHz

signal

Left

channel

only

Composite

KHz

signal

Right

channel

only

ADJUST

€

*¥

Check

output

switch

“OF

F’’

Turn

Clockwise

until

the

output

just

disappears.

Muting

Level

control

901

(on

chassis)

switch

Freq.

Adju.

L703

(on

Muting

circuit

board)

Adjust

L703

obtain

symmetrical

output

when

detuned

upper

and

lower

side.

Repeat

step

ALIGNMENT

PROCEDURE

instruments:

Sweep

Generator,

Signal

Generator,

VTVM

and

Oscilloscope.

NOTES:

Set

Selector

switch

“FM”

GENERATOR

STEPS

CONNECTED

FREQUENCY

ALIGNMENT

PROCEDURE

Instruments:

Signal

Generator

and

VTVM.

NOTES:

Set

Selector

switch

AM.

Input

signal

must

kept

low

possible

avoid

AVC

action.

GENERATOR

STEPS

COUPLING

FREQUENCY

TUNING

DIAL

SETTING

OUTPUT

INDICATOR

CONNECTED

ADJUST ADJUST

FOR

Sweep

Generator

Quiet

point

Oscilloscope

T104,

103,

Maximum

and

band

junction

102

101

Balanced

junction

R127

and

C126

(on

curve

C907

(on

board)

scope.

C908

(FM

Top

and

Input)

Bottom

Disconnect

Sweep

Generator

and

connect

Signal

Generator

antenna

terminals.

Signal

Generator

Tune

for

Oscilloscope

and

T2,

Top

Maximum

and

maximum

VTVM

Bottom

undistorted

antenna

98MHz

output

TAPE

OUT

(on

Front-

amplitude

terminals

(400Hz

point.

jack

end)

scope.

Signal

strength

100%

Touch

must

kept

mod.)

T101,

102

—3db

103

104

limitter

—

necessary.

satulation.

90MHz

(OSC),

Maximum

(400

(RF)

reading

100%

(ANT)

VTVM

mod.)

(on

Front-

end)

106MHz 106MHz

CT3

(OSC),

(400Hz

CT2

(RF)

100%

CT1

(ANT)

mod.)

(on

Front-

end)

Repeat

steps

and

until

further

improvement

noticed.

TUNING

DIAL

SETTING

OUTPUT

INDICATOR

CONNECTED

ADJUST

FOR

Tr201

Base

455

KHz

Non

inter-

VTVM

T203,

202

Maximum

(on

(400

fering

TAPE

OUT

and

201

reading

board)

through

30%

mod.)

low

end

jack.

‘(on

VTVM.

O.1mfd

scale.

board)

capacitor

Connect

600

KHz

600

KHz

L201

(OSC)

short

loop

(400

{on

wire.

30%

mod.)

board)

Radiate

L901

(ANT

signal

into

coil).

ferrite

loopstick

antenna.

1400

KHz

1400

KHz

CT5

(OSC

(400

trim.)

30%

mod.)

CT4

(ANT

trim.)

{on

Front-end)

Repeat

steps

and

until

further

improvement

noticed.

PREDRIVER/DRIVER

ADJUSTMENT

PRE-DRIVER/DRIVER

ADJUSTMENT

Set

BALANCE,

BASS

and

TREBLE

controls

mid-position.

Set

MODE

switch

‘‘STEREO’’,

SPEAKER

switch

““ON’’

and

SELECTOR

switch

“AUX”

position.

Connect

ohm,

watts

resistor

across

Left

speaker

terminals.

Then,

parallel

with

the

load

resistor,

connect

VTVM

and

the

vertical

input

leads

oscilloscope.

Connect

audio

signal

generator

Left

channel,

AUX

input

and

apply

1,000

(sine

wave)

signals.

Rotate

Volume

Control

counterclockwise

get

0.9

volts

RMS

across

ohm

(0.1

watt

output)

VTVM.

Agius

crossover

distortion

turning

Idling

Adjust

Control

VR601

(on

driver

circuit

board)

until

ideal

response

appears

scope

(see

Figure

1).

Adjust

idling

current

using

mitli-volt

meter

across

R617

resistor

(on

driver

circuit

board),

rotate

VR60O1

obtain

10mV

reading

milti-volt

meter

signal

input

(see

Figure

2).

Repeat

the

same

steps

thru

above

for

Right

channel.

MONO-STEREO

AUTOMATIC

SWITCHING

LEVEL

ADJUSTMENT

PROCEDURE

Connect

VTVM

and

Oscilloscope

the

TAPE

OUT

jack

(Left

Right).

Feed

the

signal

with

Stereo

modulation

into

the

ANT

terminals.

Set

the

frequency

MHz

(when

there

are

disrupting

signal,

choose

another

setting).

Set

the

MODE

switch

STEREO

and

FUNCTION

switch

MANUAL.

Turn

CCW

the

MONO

—

STEREO

Auto-switching

Level

Adj.

VR101

(on

board):

this

condition

which

Auto-switching

does

not

function.

Adjust

the

MPX

that

the

distortion

and

separation

will

best.

Adjust

the

VR101

that

when

the

antenna

input

level

30uV

more,

Stereo

will

switch

and

when

the

input

below

the

30uV

level,

Mono

will

switch

in.

After

adjustment,

check

make

sure

that,

indeed,

when

the

antenna

input

fevel

exceeds

30uV,

Stereo

will

switch

in.

POWER

SUPPLY

CIRCUIT

BOARD

-B1,

—32V

+B1,

32V

+B2.

32V

—B2.

—32V

C903

C902

C904

C905

Q902

(E)

Q801

(C)

Q903

(C)

Q904

{E}

NOTES:

RESISTANCE

SHOWN

OHMS.

CAPACITANCE

SHOWN

MFD.

Input

chassis

Input

from

Power

Trans.

ground

from

Power

Trans.

7901

T902

POWER

SUPPLY

(TUNER

AND

PREAMP)

VERSION

C906

+B3.

21V

+B3

21V

NOTES:

RESISTANCE

SHOWN

OHMS.

CAPACITANCE

SHOWN

MFD.

INPUT

; ,

CHASSIS

FROM

POWER

XFMR

CHASSIS

chassis

input

chassis

ground

from

Power

Trans.

ground

GND

T9OI

(SEC)

GND

T901

(Sec.)

TOP

VIEW

@ @

(

QAO

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@®

09 Mw

33)

@O@®

O®G

OOO

OOOO

OHOO

TUNING

KNOB

FUNC.

SELECTOR

SWITCH

VR502,

VOLUME

CONTROL

VR501,

BALANCE

CONTROL

~VR503,

TREBLE

CONTROL

VR504,

BASS

CONTROL

CONTOUR

SWITCH

MUTING

SWITCH

TAPE

MON.

SWITCH

MODE

SWITCH

HIGH-CUT

SWITCH

DOLBY

SWITCH

SPEAKERS

SWITCH

POWER

SWITCH

DIAL

POINTER

C903,

RIPPLE

FILTER

C902,

RIPPLE

FILTER

C904,

RIPPLE

FILTER

©®©®O®®OO®G®O®®O®©OSOOO®

7901,

POWER

TRANSFORMER

(R-CH)

C905,

RIPPLE

FILTER

7902,

POWER

TRANSFORMER

(L-CH)

MPX

CIRCUIT

BOARD

C906,

RIPPLE

FILTER

0626,

DRIVER

TRANSISTOR

(R-CH)

0625,

DRIVER

TRANSISTOR

(R-CH)

PREDRIVER/DRIVER

CIRCUIT

BOARD

VR621,

IDLING

CURRENT

ADJ.

(R-CH)

L901,

LOOPSTICK

ANTENNA

Q605,

DRIVER

TRANSISTOR

(L-CH)

VR601,

IDLING

CURRENT

ADJ.

(L-CH)

Q606,

DRIVER

TRANSISTOR

L301,

MPX

COIL,

19KHz

TUNE

L302,

MPX

COIL,

19KHz

TUNE

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©@©®OSO®©G®OOOO®

OOO

7203,

IFT

(3rd)

1202,

IFT

(2nd)

EQUALIZER

AMP

CIRCUIT

BOARD

7201,

IFT

(1st)

L201,

LOCAL

OSCILLATOR

COIL

L304,

MPX

38KHz

FILTER

AM/FM

FRONT

END

L305,

MPX

38KHz

FILTER

L303,

MPX

COIL,

38KHz

TUNE

T101,

IFT

(1st)

102,

IFT

(2nd)

T103,

IFT

(3rd)

T104,

IFT

(RATIO)

TONE

AMP

CIRCUIT

BOARD

BOTTOM

VIEW

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ANTENNA

TERMINAL

STRIP

VR901,

MUTING

LEVEL

ADJ.

MUTING

CIRCUIT

BOARD

SPEAKER

SYSTEM

—1

TERMINAL

STRIP

L703,

MUTING

COIL

SPEAKER

SYSTEM

—2

TERMINAL

STRIP

REGULATOR

CIRCUIT

BOARD

OUTLET

SPEAKER

FUSE,

L-CH

SPEAKER

FUSE,

R-CH

QBE@OQ©

©©

©®

FUSE

POWER

SUPPLY

CIRCUIT

BOARD

FOR

TUNER

PREAMP.

D803,

RECTIFIER

POWER

SUPPLY

CIRCUIT

BOARD

FOR

POWER

AMP.

D804,

RECTIFIER

D802,

RECTIFIER

D801,

RECTIFIER

HEADPHONE

RECEPTACLE

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DIAGRAM

MODEL

630

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