Bang and Olufsen 4000 Service Manual

a

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—

BEOMASTER

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TYPE

j

"

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4

TYPE

2408

»

4000

2406

USA

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e

SERVICE

8

M

ANU.

AL

:

Bang & Olufsen

PARTS

LIST

The

following

Pos.

Index

6

61000!2

5001075

$2

3191042

107

5320018

130

3452213

142

8052082

6140114

7219004 = Phono

153

8002078

16S

8013120

17S

6600019

7200019

7210046 2382009

2380011 3390007

7220027 7221019 3532092

FOR

BEOMASTER

parts

are

Mains

3.3 Dial

Edge

Back Pre-amplifier

PC-board

PC

Mains

Fuse § A-T/125

Fuse

Mains Milled

Hexagon Bag Plug Plug

Circuit

4000,

different

from

lead

Mohms,

10 % 1/2

potentiometer 6 X

plate

complete

phono

socket

IF-decoder

transformer

V

holder

socket

nut

60 X 80

mm loudspeaker FM

Diagram

TYPE

2408

Beomaster

W

100

with

4000,

kohms

sockets

type

2406

Adjustment

The

adjustment

1)

3.and

be

tuned

on

4-

which

106

in

Beomaster

should

MHz

instead

PC-board

Pos.

Plac.

178b

B22

233,

A210

239°

Al

138

£3

4000,

be

adjusted

of

102

8002078 I F-decoder

4h

150

pF

5%63V

nF

10%250V

10

nl

10%

Bt

as

Filter

70

kHz

a

Diode

27V

type

2408

should

to

4.2 V in

Miz.

the

250

be

V

made

type

as

in

2408.

Index

4000023 4130109

4130109

8022037

8300045

Beomaster

By

adjustment

4000,

of

type

front

2406

end

except

(page

the

4-3

tuning

sketch

voltage,

5)

the

dial

(page

has

4-2)

to

MODIFICATIONS

Bang & Olufsen

Electronic

The

electronic

consists

of

Resistors

The

2.7 This

pos.

voltage

kohms/4.7

modification

protection

the

following:

Nos.

490

divider

8.2

kohms

is

in

the

AF

circuit

and

491

kohms/8.2

to

lowest

introduced

output

in

the

output

have

been

changed

kohms

(outside

transistor.

as

from

No.

stage

the

144250.

tr

(OH

has

been

to

0.33

PC-board)

changed

two

ohms/2 W No,

is

divided

|

st]

co

—

|

times.

The

5100175.

into

two:

4.7K)

2.2K)

|

first

modification

4.7

kohms/2.7

ee,

is

kohms

shown

to

highest

on

below

transistor

sketch

and

The

other

modification

Diodes

pos.

Resistors

tentiometer

This

The

when

At placed

pos.

modification

four

potentiometers

servicing

the

same at

the

Nos.

pos.

at

time

output

is

485

and

487

and

Nos.

585

is

introduced

the

output

as

the

last

capacitors,

shown

486

have

494,

and

$86

pos.

Nos.

stage.

mentioned

on

15

as

from

have

the

been

kohms,

(index

585,

been

diagram

modification,

changed

are

No,

274425.

586,

587

mounted

and

to

divided

5370058).

and

on a PC-board

consists

type

AA

into a 10

$88

are

the

components

of

the

following:

143

(or

kohms

adjusted

No,

OA47)

resistor

at

delivery

outside

8002135.

No.

the

to-

8300142.

pos.

Nos.

from

the

PC-board,

to

—+4-;

487

and

494

factory

and

which

were

and a 5

should

earlier

kohms

not

be

mounted

trimmer

adjusted

on a plate

po-

qe

gI5:

ter

ms

ars

rare

OgeS

geen

Fe

Ad

mecsued

sistors

without

speciton:

marked

Se

a

tM

AF

semativities

ew Stmv mv mv

Vero

Sere

tae

sey

alae

ime

powte

wah

with

TAPE

2-

button

designation;

GBT

HKHigh

KT

PS:

Porystyrend

Metallized

should

be

measured

femme

tro

trie

Siers

respect

wo

deprevsed

V2W.

plastic

at

S0mW

ork

eree

Zoe

Gems

chassis

outpt

fers

rR

Riek

ora

tran

Hill

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eorak

tk

+k

ed

Bully

ort

gina

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ores

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Bias

ome

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Bill

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Bored

cork

tims

in

rn

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15

Gat!

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nd

kere

tar

ere

fork

omer

ome

eooR

Pears

ems

at

Subpect

to

chonge

without

note

9222088

T-1A

BEOMASTER

4000,

TYPE

2408

Fieldstrenght Feltstarne Feitstyrhe

29m.

7166

334204

EY

aS

achat

or

neon

AL

Up¥e

8.

SORy C10, D:

30mm

De

ongey Qedructies lund

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HE

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De

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AL

UW

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O°

ory

De

singers aadieyteet Nea

fotamntinie

OI

gerron

awe

CGN

ome

ean

Detewen

OnE,

Rg = Tn

deren

Spareeeges

FA

Kreagt

Phorsigna!

mos

sind

Berets

WF,

spendinjer

of

wt

gogesl emt

Ore;

Roa

ew

thane

ent

a

sind

ponitiy

gemesses

Ons stint, ba

wear

Tuner

unt

Rg

Ta

or

posit

DE

oe

wet

Sel

oat

TB

J,

Antes

AY

at

ard

len

eee

ae

Stes

en © sige

trae,

of

Verhattens

tu

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OY

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Musee

und

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eters

enden

*

|

Bang & Olufsen

0-1

CONTENTS

Technical

Disagsonitily’

Circuit

Adjustments

Service

Parts

data

diagram,

tips

list.

2.0.6.6

»ig2xez

..........0505-

sees

52003

ore

PC

boards

and

parts

ante

0.0

sie

sees

++...

esa

INHALTSVERZEICHNIS

Technische

ose

Lerleputig 9 22139535;

list.

Schaltbild,

Einstellungen).

Servicetips

Stiickliste

Daten

Printplatten

........-00000%

Sis

und

«5-22:

20056066

Bye

agers

Stiickliste

eres

eves

SECTION/ABSCHNITT

oat

...

.

iets

1

2

3

4

5

6

Bang & Olufsen

1-1

TECHNICAL

Anette

Power

[Seeiarinpscencs

HermenieDizorion

Dengiig

Inputs

Signal-to-noise

ratio

2

FA

2

DATA

Output

Rae

|

Mer

1000

Hz,

(see

Harmonic

[Nominal

———SSSCSCSC~dC

|

DIN

AS

SODatSOmWoumputtOoOHe

Sensitivity

1000

Hz

At

specified

measurement

DIN

45

Load

impedance:

dance

1.2

4.7

kohm

DIN

45

impedance:

1.2

kohm,

DIN

45

fied

input

at

specified

at

output,

500

Between

kohm,

500

Between

Pickup,

other

500

Signal

voltage,

en

distortion

Distortion

specified

linear

channels

Pickup,

other

inputs,

low

inputs

voltage

1000

output,

inputs

impedance

4.7

te

low

kohm

at

Hz

terimrepones

Music

dance.

Tape

4.7

Pickup

dance

Tape

Load

4.7

all

inputs

1000

impe-

load

speci-

and

RMS

dt

Pickup

low

recorder

Pickup

low

impedance

Load

impedance

1.2

kohm

recorder

Load

impedance

kohm

low

Load

impedance

1.2

kohm

recorder

impedance

kohm

Hz

250 - 10,000 1000

Hz and 250 - 10,000

|

impe-|_

impe-

Hz

‘Subject

to

change

without

DIN

45

500

Require-

Cae

ents,

2X 6 watts

page

esas

6,

Seen

eid

SSSSSSCSC~d

<5

mV/

247

kohm

£500

2

50

24048

>

3008

>

5048

>

40dB

0.1

-2 load (1 - 50

mV/2470

dB

mV

impedance

kohm)

kohm | 250

per 1 kohm

BEOMASTER

|

2X

2 X 100 2X

tm

0

3

mV/47

>58

>62d8

>76

>45d8

>35dB

>60

>4540B

15

mV

output

60

40

55

mV/1000

dB

4B

at

impedance

notice

4000

watts/4

watts/8

watts/4 watts/8

kohm

4.7

kohm

|

ohms

das

Contre

Treble

Control

z|

2

I-to-noise

:

4

z

5

Z

3

i

z

§

2

:

2

s

Ab

s

Ratio

ion

Measured

patitae

at

12,500

Hz

coesond

aa

26

signal-to-noise

dB

curve

filter

IEC

30

dB

signal-to-noise

—

3B,

deviation

DIN

45

500,

DIN

45

500 + 1.5

DIN

45

500

DIN

45

500,

Deviation

DIN

45

40

500,

123/A

page

2

page

kHz

page

ratio

40

kHz

dB,

pre-emphasis

2,

measured

2

deviation

IHF

at

1000

40

50

kHz

yS

Hz

19

38

a

kHz

DIN

|

mw]

gl}

liv

>

IV

2

45

500

os

54dB

Nn

ab

2608

20

dé

8

S

3048

Require-

+

BEOMASTER

104 Mia

@7.5.

75

at

pV

<1.4

<2

pV

at

75

<1

pV

at

75

>65

dB

20 - 15,000

<0.4%

>35

>

4048

>

40dB

Hz

dB

4000

ohms

NOTES / NOTIZEN

Bang & Olufsen

1-3

TECHNISCHE

DATEN

eterno

Ausgangsleistung

[

Leutsprecherimpedanz

feed

ieroduaton

roeluna

Héhenregelung

i

1000

Hz,

bei

(siehe

|

Nennscheinwiderstand

[OWN

angefiihrter

Klirrgrad)

45

600tei

SomW

ae

Empfindlichkeit Ausgangsleistung,

DIN

45

Bel

angegebener

linear

gemmessen.

DIN

45

Eingange.

abnehmer

sonstige

DIN

45

neratorimpedanz: ohmig

1,2

4,7

kOhm

DIN

45

Signalspannung

Eingangsspannung,

Gemesson

Gomes

bei

angegeb.

1000

500,

50

mW

Ausgangsleistung

Ausgangsieistung,

500

Zwischen

Generatorimpedanz:

niederohmig

Einginge-4,7

500

Zwischen

Tonabnehmer

kOhm;

sonstige

500

bei

angegebener

1000

bel

40

He

bel

12.500

Verzerrung

Avnet

Hz

Kanélen,

kOhm

Eing3ngen,

1,2

kOhm;

Eingange

Hz

alle

Ton-

Ge-

nieder-

He

jus

Sin

Musik

|

1000

ee

Tonabnehmer, derohmig.

Tonbandgerét

+=

Tonabnehmer,

derohmig, torimpedanz

1,2

Tonbandgerat,

neratorimpedanz

4,7

Tonabnehmer,

derohmig,

torimpedanz

1,2

Tonbandgerat,

neratorimpedanz

4,7

Tonhandgerat

Genera-

kOhm

Genera-

kOhm

DIN

45

Bi.

6,

Verstirker

2 X 6

Watt

keine

oder 80mm

|

nie- 5 mV

nie-|

Ge-

nie

Ge-

——=———*dt

8

z

= 2

vA

2

50dB

>

4008

>

3008

250dB

>

4048

0,1-2mV

Belastungsimpedanz

(1-50

kOhm)

ine

Anderungen

500

Anford.

ee

bei

247

iV

je 1 kOhm

|

kOhm| 3 mV

3

fo)

3

vorbehalten

BEOMASTER

Typ

2406

2X

60Watt/4

2X

2 X 100

2X

40Watt/8

Watt/4

55

Watt/8

4000

Ohm

<0 oe <oa

% 20-9000 10-35.00

4

8

>58

>

58

>62dB

>75

>45dB

>36

15

mV

Ausgangsimpedanz

276

£1448

3

bei

<

dB

Fe He

47

kKOhm

z

g é 3

bei

4,7

kOhm

ee

Bereich

Empfindlichkeit

Begrenzung

Gerduschspannungs-

Selektivitat

Obertragungsbereich

nische

Wl

Obersprechdampfung

zwischen Stereogeraten

Pilotton-Fremdspan-

nungsabstand

Verzerrung | DIN

den

Kandlen

eae

26

quenzhub

30

—3<dB,

|

DIN

IHF

DIN

be

DIN

dB

Gerauschspannungsabstand,

40

kHz,

IEC-Filterkurve

dB

Geraduschspannungsabstand

Frequenzhub

45

600

BI.

+4000

kHz

45

500 + 1,5

45

500

45

500

BI.

45

500

BI.

40

2

dB,

Vorbetonung

2,

gemessen

2

kHz

bel

Fre-

123/A

|HF

50 uS

1000

Hz

19

38

kHz

DIN

gen

eae

>

5448

ee

50 - 6.300

<2%

>

2648

22048

23048

45

500

Anforderun-|

Sint

2

UN

ee

Hz 20 - 15.000

BEOMASTER

i

|

Te

<1,4yV

<2

yV

<1

pV

>65

<04%

>35

>40

bei

dB

4B

dB

48

bei

75

Hz

3

Ohm

Bang & Olufsen

ee)

Stromversorgung

eee

NOTES / NOTIZEN

a

Wechselspannung Netzfrequenz

Verbrauch

eee

110-130-220-240 50 - 60

Hz

20 - 275

Watt

le

Volt

Bang & Olufsen

1

LSE / DISASSEMBLY / ZERLEGUNG

Bang & Olufsen

3-1

TRANSISTOROVERSIGT

oO

8320119

2

1832019

8320104

8320161

BC

es BC

/

TRANSISTOR

CHART / UBERSICHT

ele

153

154

Hae

8C

178

BC

262

acase]

108

BC

B 8

B

eS

BC

158

B

|

MPS

UBER

TRANSISTOREN

opo

6518

BC

6519

BC

[ee

212

B-L

|BC

252

B

212B-L/B8C

2518

--

DIAGRAM

1

AGEs

qISEees

reese

[ussere

[

ureere

|

ansees

|

ansees

|

TR21

oe a ae]

a»|x | rp

8/8

[sis

(3

s/|8

2/83

i

ic

108

B/

Bi

BC

==

108

BC

108

B/

BC

148

14)

148

B

1

BC_183

ee

B

oe

BC

BC BC

BC

168B

1678

1828-L

1678 182B-L

168

183B-L

oe | rca

L

B

—-+4

BEOMASTER

4000,

TYPE

2406 — DIAGRAM

jav_DISCR

sts

Cem

12v

p

sy

Fieldstrenght Felistarke

?)

Felistyrke

io

AI

Te

70mVpp

1,4Vpp

Vpp

96Vpp

055Vpp

922279

T-1B

92220816

Bang & Olufsen

2406 — DIAGRAM

idstrenght

istdrke

istyrke

1

DFinsirument

0

|

oS

Sy

[anna

9T-18

£16

1N4148

B29,

(2,7k)

L47y

rr. | 20v

ey

33)

iK

[=

Kanal Krydstalejustering.

)

<37)

een

(228)

talk

adjustment

trennung.

20v

—

({55}°

aa) | O84,

caf

STEREO

Voltages

given

are

positive

and

measured

through

ist

mit

zwischen

og

gennem

with

with should

FM

Pilotsignal

spandinger

et

modulated

RF

sensitivities Signalconnection A:

3pV

Die

angegebenen

gedriicktem

und

HF-Empfindlichkeiten

Die

Signatverbindung

A:

3pV

B:

SOpV

Cc:

tOpv

D:

30mv

De

angivne

Nedtrykket HF-felsomheder

Signalforbindelsen

A:

3pV

B=

SOpV

C=

10pV

D:

30mv

with

FM-button

stereosignal

be

measured

between

front

nF;

Rg=75.n

Spannungen

-Knopf

gemessen.

moduliert.

sind

zwischen

10nF;

Rg=

er

signal

pd

er

matt

ved

metiem

10nF;

Rg=

Subject

Anderungen

Ret

til

endringer

respect

to

depressed,

on

sind

bei

Tuner

75a

positive i forhold

ca.

SW

tuner

75.0,

to

change

chassis

and

the

antenne.

at

SW

outputaf=225kcl5,

end

and

point @ must

positiv

Das

Antennesignal

einer

Ausgangsleistung

und

Punkt@muss

100pV

med

pilottone

output

af

=22,5kHz , f,

og

punkt @ fjernes.

without

vorbehalten.

forbeholdes.

an

RF

signal

(75.0).

im

Verhaltnis

entfernt

til

stel

og

pd

notice.

of

100pV

fmog*

400cIs.

be

removed.

zu

Masse

und

ist

etwa

FM-knappen

(75a)

bei

100.

fyoq?400Hz

(752)

von

SWgemessen,af=22,5kHz

werden.

malt

med

antennen.

44"

400HZ

Bang & Olufsen

PC

FM FM

(ike

‘CEPA

erg

123104

°

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i

w

8002057

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ally

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END — 8050054

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