Teac BX-550 Manuel utilisateur

TEAC.

SERVICE

MANUAL

BX-550

High

Speed

Integrated

Amplifier

BX-330

Integrated

Amplifier

The

BX-550B

and

the

BX-330B

have

black

finish;

otherwise,

they

are

the

same

the

BX-550

and

the

BX-330.

CONTENTS

Specifications

and

service

data...

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Voltage

conversion...

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ene

Main

parts

locations

occ

ice

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eas

0110030111

Block

and

level

diagram

2...

1...

nee

Parts

location

and

parts

list

(BX-550)

2...

eee

Parts

location

and

parts

list

(BX-330)

2.0...

eee

ees

boards

and

parts

list

(BX-550)

2...

eee

boards

and

parts

list

(BX-330)

2...

eee

CAUTION

AParts

marked

with

this

sign

are

safety

critical

components.

They

must

always

replaced

with

identical

components

refer

the

TEAC

Parts

List

and

ensure

exact

replacement.

Effective:

October,

1980

5704007100

BX-550/BX-330

SPECIFICATIONS

AND

SERVICE

DATA

Improvements

may

result

features

specifications

changing

without

notice.

SPECIFICATIONS

Input

Sensitivity

PNONO

PHONO

TUNER,

AUX

TAPE

1,2

Rated

Output

Voltage

TAPE

REC

Rated

Output

Power

(Both

channels

driven,

Distortion

0.1%,

Impedance

ohms,

kHz)

Required

Speaker

Impedance

SPEAKERS

selector

position

Dimensions

Width

Height

Depth

Weight

Power

Requirements

SERVICE

DATA

BX-550

BX-330

pV/33

ohms

uV/15

ohms

2.5

mV/47

ohms

2.5

mV/47

ohms

150

mV/10

ohms

150

mV/10

ohms

150

mV/10

ohms

150

mV/10

ohms

150

mV/2.2

ohms

150

mV/2.2

ohms

55W+55W

35W+35W

ohms

410

140

320

(mm)

(16-1/8"

5-1/2"

12-5/8”)

(19-13/16

Ibs)

net

410

140

320

(mm)

(16-1/8"

5-1/2”

12-5/8"}

7.5

(16-9/16

Ibs)

net

Voltage

Power

Consumption

(W)

(V)

(Hz)

BX-550

BX-330

GENERAL

EXPORT

100,

117, 220,

240

50/60

100i]

PEUROPE.

220

100

U.K.,AUSTRALIA,

240s

St“

U.S.A.,

CANADA

The

power

requirements

for

products

distributed

the

U.K.,

Australia,

Canada

and

the

United

States

and

certain

other

areas

Europe

are

not

adjustable.

Power

Muting

Time

Seconds

LOUDNESS

Control

—

AUX

Section

——

Output:

150

TONE

Controls

1kHz:

(reference)

Input:

100

Hz:

+8dB+1dB

Output:

kHz:

+1dB

MUTING

Circuit

(BX-550)

Output:

MUTING

OUT,

kHz

BASS:

FLAT

TREBLE:

FLAT

OdB:1dB

OdB

(Ref.)

0dB+1dB

MUTING

IN,

0.9

BASS:

MAX

LOW

CUT

Filter

(BX-550)

+7dB+

dB+1dB

+7dB+1dB

TREBLE:

MAX

ical

Output:

LOW

CUT

OUT,

BASS:

MIN

oae148

LOW

CUT

IN,

7V+1dB

-7dB+1dB

0dB+1dB

-7dB+1dB

TREBLE:

MIN

TONE

OUT

Circuit

(BX-550)

Harmonic

Distortion

Frequency

Response

Output:

(BX-550),

(BX-330)

TONE:

OUT,

VOLUME

Control:

MAX

Hz:

Less

than

0.01%

Output:

kHz

(reference)

1kHz:

Less

than

0.008%

Hz:

kHz:

Less

than

0.1%

Maas

100

kHz:

*°

than

42 dB

(ratio)

kHz.

Harmonic

Distortion

Noise

Level

Hz:

Less

than

0.01%

VOLUME

Contro!:

MAX,

INPUT:

Shorted

1kHz:

Less

than

0.008%

Less

than

560

(-65

dB),

Weighted

kHz:

Less

than

0.1%

Damping

Factor

kHz,

Noise

Level

Less

than

320

(-70

dB),

Weighted

—

Phono

Section

—

SOURCE

Selector:

PHONO-MM,

VOLUME

Control:

MIN

input

Level

input:

kHz/2.5

(Signal

source

impedance:

3.32)

REC

QUT:

150

Frequency

Response

+19

+1dB

+13.1

+0.5

(reference)

-13.7

+0.5

~19.6

Hz:

100

Hz:

kHz:

Harmonic

Distortion

Output:

Hz:

Less

than

0.01%

1kHz:

Less

than

0.005%

kHz:

Less

than

0.1%

Noise

Level

Input:

3.30

terminate

Less

than

(approx.

-86

dB),

Weighted

BX-550/8X-330

—

Phono

Section

——

;

SOURCE

Selector:

PHONO

MC,

VOLUME

Control:

MIN

Input

Level

Input:

1kHz/50

(Signal

source

impedance:

3.32)

REC

OUT:

150

Frequency

Response

20Hz:

+19dB+1dB

kHz:

0O4dB

(reference)

kHz:

-19dB+1dB

Harmonic

Distortion

REC

OUT:

Hz:

Less

than

0.1%

1kHz:

Less

than

0.1%

kHz:

Less

than

0.7%

Noise

Level

Input:

3.320

terminate

Less

than

250

(approx.

-72

dB),

Weighted

VOLTAGE

CONVERSION

VOLTAGE

CONVERSION

(GENERAL

EXPORT

MODEL

ONLY)

SURE

REMOVE

THE

POWER

CORD FROM

THE

OUTLET

BEFORE

REMOVING

THE

OUTER

CASE

AND

RE-

POSITIONING

THE

VOLTAGE

CONVERSION

PLUG.

Remove

the

top

and

side

metal

cover

unit

removing

the

screws

from

each

side.

Locate

the

voltage

selector

plug

the

left

side

the

BX-550/

BX-330.

Remove

the

plug

pulling

out,

then

re-insert

that

the

arrow

the

plug

exactly

fines

with

the

white

line

that

in-

dicates

the

appropriate

voltage.

Replace

the

cover.

Fig.

BX-550/BX-330

PARTS

LOCATION

BX-550

R139

TP-|

TP-2 TP-6

R239

TP-5

TP-3

TP-4

IN/OUTPUT

PCB

Assy

MAIN

PCB

Assy

Power

Transformer

R133

R233

Voltage

Selector

PCB

Assy

METER

AMPL

PCB

Assy

VOLUME

PCB

Assy

R726/R826

TONE

CON

AMPL

PCB

Assy

R728

BX-330

RI3O

TP-1

TP-2

TP-G6

R230

TP-5

TP-3

TP-4

IN/OUTPUT

PCB

Assy

MAIN

PCB

Assy

Power

Transformer

Sia

R224

Voltage

Selector

PCB

Assy

LED

PCB-I3!

Assy

VOLUME

PCB

Assy

R903 R904

TONE

CON

AMPL

PCB

Assy

BX-550/B8X-330

ADJUSTMENTS

4-1

BEFORE

ADJUSTMENT

(Do

not

apply

power)

Set

the

VOLUME

control

MIN

and

the

SPEAKERS

selector

OFF.

Set

the

semi-fixed

variable

resistors

the

following

positions.

R133/R233

(BX-550)

R124/R224

(BX-330)

R139/R239

(8X-580)|

ata

Gta

R130/R230

(BX-330)

whore

the

center

position

4-2.

MID-POINT

POTENTIAL

ADJUSTMENT

Depress

POWER

switch

ON.

Connect

the

voltmeter

between

T.P-5

(for

L-ch)

T.P-6

(for

R-ch)

and

GND.

Adjust

R133/R233

(BX-550)

R124/R224

(BX-330)

that

the

voltmeter

indicates

+50

DC.

Note:

differential

voltmeter

preferable.

VOLTMETER

Bie

Fig.

BX-550/BX-330

4-3

IDLING

CURRENT

ADJUSTMENT

Connect

the

voltmeter

between

T.P-1

and

T.P-2

(L-ch).

Adjust

R139

(BX-550)

R130

(BX-330)

that

the

volt-

meter

indicates

approx.

100

mV.

After

adjusting

R139

(BX-550)

R130

(BX-330),

allow

seconds

for

the

amp

warm

up.

Readjust

R139

(BX-550)

R130

(BX-330)

that

the

voltmeter

indicates

20~30

mV.

(Idling

current

30~45

mA).

Connect

the

voltmeter

between

T.P-4

and

T.P-3

(R-ch)

Repeat

procedures

above

and

adjust

R239

(BX-550)

R230

(BX-330).

NOTE:

When

using

oscilloscope,

instead

the

voltmeter,

carefully

connect

the

oscilloscope

that

the

oscilloscope

GND

terminal

not

connected

the

GND

the

ampli-

fier,

thereby

causing

short.

Use

the

oscilloscope

ungrounded

state.

Oem

meme

ene

PEAS.

VOLTMETER

20~

l0Omv

30mvV

Fig.

4-4-1

POWER

OUTPUT

METER

ADJUSTMENT

(BX-550)

Refer

Fig.

oan

Connect

the

voltmeter

SPEAKERS

terminal

Set

the

SPEAKERS

selector

and

the

SOURCE

selector

AUX.

Set

the

VOLUME

control

MAX.

Apply

1-kHz

input

signal

provide

output

power

(approx.

2.83

Vrms)

the

AUX

terminals.

Adjust

R726

that

the

Power

Output

Meters

indicate

1W.

Connect

the

voltmeter

between

and

U701.

Adjust

R826

that

the

voltmeter

indicates

OV.

Set

the

VOLUME

control

MIN.

Connect

the

voltmeter

between

the

collector

0702

and

GND.

Adjust

R728

that

the

voltmeter

indicates

OV.

Faaion)

4-4-2

LED

METER

ADJUSTMENT

(BX-330)

Refer

Fig.

Connect

the

voltmeter

SPEAKERS

terminal

Set

the

SPEAKERS

selector

and

the

SOURCE

efector

AUX.

Set

the

VOLUME

control

MAX.

Apply

1-kHz

input

signal

provide

output

pover

(approx.

2.83

Vrms)

the

AUX

terminal.

Adjust

R903

(L-ch)/R904

(R-ch)

that

the

POWER

LEVEL

meter

just

begins

indicate

3W.

BX-550/BX-330

ROSAS

EAC

5210017400

1P-S30-HB

Fig.

R904 R903

LED

PCB-I3t

ait

ahaRal

Vatatphntnte

Fig.

BX-550

[TAPE

COPY

TAPE

je?

SOURCE

BLOCK

AND

LEVEL

DIAGRAM

BX-550

WG-0

OTAPE

2©1

[wooe]

[COUDNESS]

[VOLUME

MONO

SOURCE

STEREO

~O0—-O-

O--O

TAPE

REV_,

FLAT

ioe

AMPL.

—

(2)

Ort

(5)

(TREBLE)

oO!

BALANCE

Reh

TSPEAKERS

MUTING

]

(7)

(9)

POWER

AMPL.

out

068

ave

=208,

PROTECTION

CIRCUIT

(6)

+25v

—15V

POWER

+12v

SUPPLY

Suay

+47V

MAX

—

2Vv

+15

—47V

MAX

ch-e-—o—_“A

METER

AMPL,

WATTS

METER

VOLTAGE

RESPONSE

(dB

)

1ooy

+40

“|

SPEAKERS]

ved

SSwi2tv),

love

+20

POWER

AMPL.

G=26¢8

;

O.25W(1.4V),

AMPL

FLAN

200-4

(13Omv)

100

-20

-30

AMPL.

35.548

—40

44-50

~60

4009

-79

-—

AMPL.

100

-80

-90

BX-330

(10)

TAPE

COPY

TAPE!

ANY

SOURCE

oTAPE2

TAPE

Tx,

OUT

BX-330

TONE

AMPL.

POWER

AMPL.

PROTECTION

CIRCUIT

+40V

MAX

—40V

MAX

16V

poe

POWER

SUPPLY

-—+

+B6V

+15V

LED

METER

AMPL.

VOLTAGE

RESPONSE

(dB)

100Vv

+40

401

430

35wit67V),

lov

+20

POWER

AMPL.

+10

25.7

PHONES

hod

ce]

O.25W(14V),

160

—_

FLAT

AMPL.

=10

16.443

200

100

my,

-20

(150

mv}

307

-30

“|

AMPL.

35.5

iomvz|

-40

(2)

-50

Imv—

AMPL,

4005-79

}—

2004

1oopv

~80

-90

(80

pv)

Bx-550

—=—

wot

“11

“12

PARTS

LOCATION

AND

PARTS

LIST

(BX-550)

PARTS

LOCATION-1

Round

Washer

Head

M4x6

(BLK

Ni)

PARTS

NO.

*5800009900

*5552438000

*5534730000

*5800017700

*5800087700

*5800087800

*5800078800

5800087300

5800087400

*5800078700

5800078900

5800079000

*5800074800

5800074500

5800074600

5800074300

5800074400

5800009600

5800018300

*5124022000

DESCRIPTION

Cover,

Top

Cover,

Top

Button,

Push;

Button,

Push;

Parts

marked

with

*require

longer

delivery

time

than

regular

parts.

REMARKS

Escutcheon

Assy,

Meter;

Escutcheon

Assy,

Meter;

Escutcheon,

LED

Panel

Assy,

Front;

Panel

Assy,

Front;

Cover,

Meter

Knob,

(B)

Lens,

LED

Knob,

Selector

Knob,

Selector

(B)

Knob,

VR;

Knob,

VR;

(B)

Knob,

Lever

Knob,

Lever

Jack,

PHONES

BX-550

BX-550B

BX-550

BX-550B

BX-550

Part

BX-550B

Part

BX-550

BX-550B

Partof1

BX-550

BX-550B

BX-550

BX-550B

BX-550

BX-550B

BX-550

BX-5508

BX-550B

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