NAD 3030 Manuale utente

SERVICE

MANUAL

NAD

3030

AMPLIFIER

CONTENTS

SPECIFICATION

PAGE

2

ALIGNMENT

PAGE

3,

4,5

INSIDE

VIEW

OF

UNIT

PAGE

6

PARTS

LOCATION

OF

PCB

PAGE

7

WIRING

DIAGRAM

PAGE

8

CIRCUIT

DIAGRAM

PAGE

9

PARTS

LIST

PAGE

10

SPECIFICATION

*

Measurements

identified

by

an

asterisk

are

taken

in

accordance

with

the

new

IHF

A-202

amplifier

measurement

standard.

Power

Amplifier

Section

*

Continuous

average

power

output

at

8

ohms

20—20K

Hz

both

channel

driven

Rated

distortion,

20—20K

Hz

*

Clipping

headroom

at

8

ohms

Clipping

power

at

8

ohms

at

4

ohms

at

2

ohms

Dynamic

headroom

_at

8

ohms

Dynamic

power

at

8

ohms

at

4

ohms

at

2

ohms

*

Reactive

load

rating

*

Transient

Overload

Recovery

Time

*

Slew

Factor

Slew

Rate

Damping

factor

at

50

Hz

(Ref.

8

ohms)

T.H.D,

20—20K

Hz

From

250

mW

to

30

W

S.M.P.T.E.

I.M.D.

(60

Hz

+

7KHz,

4:1)

From

250mW

to

30W

LH.F.

ILM.D.(19KHz

+

20KHz)

at

30W

T.I.M.

(15KHz

Sine

+

3.18KHz

Square

Wave)

at

30W

Frequency

Response,

20—20K

HZ

Frequency

Response

Range

+

3dB

Preamplifier

Section

*

Input

Impedance

Resistance/Capacitance

Input

Sensitivity

(1

KHz)

*

For]

watt

out

30

Watt

out

Input

Overload

at

1KHz

20

Hz

20

KHz

THD

(20—20K

Hz)

and

IMD

at

+

30dB

input

level

RIAA

Response

Accuracy

Siqnal

to

Noise

Ratio

A—weighted

(a)

with

phono

cartridge

connected

Ref

10mV

*

Ref

5mV

(b)

with

short-circuit

input

Ref

10mV

High

level

input

*

Inputimpedance

Resistance/Capacitance

Input

sensitivity

*

For

1

watt

out

For

30

watt

out

Siqnal

to

Noise

Ratio,

A—-Weighted

(a)

with

mute

off

*

Ref

1

watt

out

Ref

30

watt

out

(b)

with

mute

on

Ref

1

watt

out

*

Maximum

input

signal

Rrequency

Response,

20—20K

Hz

Controls

Bass

control,

range

at

50

Hz

Treble

control,

range

at

10

KHz

Infrasonic

filter

|

Turn

over

frequency

Slope

(dB/octave)

High

filter

Turn

over

frequency

Slope

(dB/octave)

Mate

Physical

Specification

Dimensions

WxHxD

inch

cm

Net

weight

Shipping

weight

Power

Consumption

at

1

watt

out

30

watt

out

30W

<

0.09%

+

1.2dB

40w

SOW

60W

+2.2dB

50W

60W

70W

+1.7dB

<<

Ipsec.

>

50

15V/psec.

50

<

0.09%

<

0.09%

<

0.09%

<_

0.09%

+0.5dB

5—45K

Hz

47KQQ/47PF

0.5mV

2.5mV

190mV

19mV

1.9V

<

0.02%

+

0.3dB

>

80dB

>

74dB

>

84dB

50K92/100PF

30mV

150mV

>

80dB

>

92dB

>

85dB

infinite

+

0.5dB

+

10dB

+

10dB

20

Hz

12

7

KHz

6

—20dB

154x5.5x12

39

x

14x

30.5

20

Ibs/9

kg

22

Ibs/10

kg

30VA

200VA

ALIGNMENT

1.

IDLE

CURRENT

ALIGNMENT

ARWNo

¥

Numb

WwW

*

5

Minutes

minimum

pre-heating

is

necessary

for

idle

current

alignment.

.

Set

the

volume

control

at

minimum

position.

.

Speaker

switch

should

be

set

at

off

position.

-

Connect

DC

voltmeter

across

R637

for

right

channel

and

across

R638

for

left

channel.

(see

fig.

1)

.

Record

the

reading

of

DC

voltmeter

and

refer

to

the

following

chart

to

find

the

appropriate

value

resistor

to

connect

in

parallel

with

R625

(right

channel),

or

R626

(left

channel)

on

the

bottom

side

(pattern

side)

of

PCB.

Important

notice:

The

power

switch

must

be

in

the

off

position

when

soldering

is

done.

Reading

of

DC

Voltmeter

Parallel

Resistor

Reading

of

DC

Voltmeter

Parallel

Resistor

0.4

to

0.8

mV

ik

ohm

3.1

to

4.0

mV

2k2

ohm

0.9

to

1.2mV

1k2

ohm

4.1

to

5.0

mV

2k7

ohm

1.3

to

2.0

mV

1k5

ohm

5.1

to

6.0

mV

3k3

ohm

2.1

to

2.4mV

1k8

ohm

6.1

to

7.0mV

3k9

ohm

2.5

to

3.0

mV

2k

ohm

7.1to

10mV

4k7

ohm

.

Read

the

DC

voltage

across

to

R637

(right

channel)

and

R638

(left

channel)

again.

_

If

the

DC

voltage

were

between

10

mV

and

20

mV,

then

the

alignment

is

completed.

_

If

the

DC

voltage

were

less

than

10

mV,

the

value

of

parallel

resistor

should

be

increased

until

the

DC

voltage

is

between

10

mV

and

20

mV.

_If

the

DC

voltage

were

more

than

20

mV,

the

value

of

parallel

resistor

should

be

reduced

until

the

DC

voltage

is

between

10

mV

and

20

mV.

2.

POWER

METER

ALIGNMENT

1.

Feed

a

IKHz

sine

wave

approx

150mV

RMS

to

both

channel’s

Aux

inputs.

2;

Connect

an

8

ohm

(+20%)

dumy

load

and

an

AC

voltmeter

and

oscilloscope

to

the

“main

speaker”

terminals

on

the

rear

panel.

_

Set

the

volume

control

at

maximum

position

and

other

controls

are

set

at

their

normal

positions.

.

Set

the

speaker

switch

to

“main”

position.

.

Adjust

the

input

signal

level

till

the

output

voltage

is

15.5

V

making

sure

that

no

clipping

of

the

waveform

is

occurring.

.

Adjust

VR

1

(for

right

channel)

and

VR

2

(for

left

channel)

for

a

meter

indication

of

30 W.

(or

0

dB).

(sec.

fig.

3)

In

cases

of

poor

mains

regulation

it

is

possible

that

slight

clipping

occurs

at

15.5

V

when

both

channels

are

driven

simultaneously.

If

this

is

the

case,

do

the

calibration

one

channel

at

a

time.

ALIGNMENT

3

DC

OFFSET

ALIGN

MENT

1.

5

minutes

minimum

pre-heating

is

necessary

for

DC

offset

adjustment.

2.

Set

the

volume

control

at

minmum

position.

3.

Speaker

switch

should

be

set

to

“‘main”

position.

4.

Connect

a

DC

milli-voltmeter

to

the

“main

speaker”

terminals

of

each

channel.

The

meter

sensitivity

should

be

set

for

100-300mV

full

scale

deflection.

The

positive

input

of

the

meter

should

be

connected

to

the

red

(+)

speaker

terminal.

.

If

the

readings

are

within

+

SOmV,

then

no

adjustment

is

necessary.

6.

If

the

reading

is

more

than

+

50mV

then

refer

to

Table

I

to

find

the

appropriate

value

resistor

to

connect

from

point

A

(right)

to

C

(right)

on

the

bottom

side

(pattern

side)

of

PCB.

(see

fig.

1

)

B

(left)

to

D

(left)

7.

If

the

reading

is

less

than

-SOmV

then

also

refer

to

Table

I

to

find

the

appropriate

value

resistor

to

connect

from

point

A

(left)

to

E(left)

one

the

bottom

side

(pattern

side)

of

PCB.

(see

fig.

1

)

B

(right)

to

F

(right)

8.

Use

a

piece

of

insulating

sleeve

on

the

resistor

legs

to

avoid

shorting

to

PC

board

tracks,

and

make

sure

the

resistor

is

not

pressed

against

a

sharp

cut

edge

of

a

component

leg.

*

Important

notice:

The

power

button

must

be

in

the

off

position

when

soldering

is

done.

an

Table

I

Reading

of

DC

Milli

Voltmeter

*Resistor

50

to

60

mV

100k

ohm

OR

330k

ohm

60

to

75

mV

82k

ohm

OR

270k

ohm

75

to

90

mV

68k

ohm

OR

220k

ohm

90

to

110

mV

56k

ohm

OR

180k

ohm

110

to

135

mV

47k

ohm

OR

150k

ohm

135

to

165

mV

39k

ohm

OR

120k

ohm

165

to

200

mV

33k

ohm

OR

100k

ohm

to

mV

ohm

OR

ohm

9.

After

having

soldered

in

the

resistor,

repeat

steps

1

through

5.

*

If

the

feedback

resistors

of

power

amplifier

(R

613,

R614)

are

10

kohm

then

select

from

colum

A

if

33

kohm

then

select

from

colum

B.

*

Ryy

(Right)

Ryo

(left)

For

Idle

Arrent

Alignment

Ry1

(Right)

Ry2

(left)

For

DC

OFFSET

Adjustment

(If

“+”

reading)

Ry3

(Right)

Ry4

(left)

For

DC

OFFSET

Adjustment

(If

“—”

reading)

ALIGNMENT

1S-~19Ge

RAY

Tuk

a1

Fig.

1

Patten

Side

View

L

ci)

ok

j

@

i:

|

o

@

|

i

@

oe

?

@

e

©

@

e

War)

re:

©:

INSIDE

VIEW

OF

UNIT

pz

YARED

4

Ac

220

st

a

—

PARTS

LOCATION

OF

PCB:

oO

>

w

«

©

wn

°

=

!

a)

=

Fig.

3

Fig.

4

Fig.

5

SWITCHED

_U

NSWITC

HED

TI-6

TL-7

TO

1L2P

PRIMARY

SECTION

SWITCHED

UNSWITCHED

4)

tMi-6

=

TML~7

THIES

i

[|

FOR

TO

1L2P

PRIMARY

SECTION

:

UL.LO.CSA

FOR:EC

sc

AS

BS

PRIMARY

SECTION

PRIMARY

SECTIO

SEE

INSTRUCTIO

WIRING

DIAGRAM

REMOTE

SPEAKER

GROUND

|

Ma

(2)

Tel

(=

78(0)

SS

eT

2

(

0

ESS

SESE

(OX

Back

(1x

BROWN,

(Qi

RED

(@

yertow

Bae

{(O:

BLUE

POWER

METER

(>

GRAY

DY

wHite

19-1056

BALANCE

Germany,

Portugal,

Spain,

France,

Argentina,

South

Africa

EC

3

SC

:

Denmark,

Sweden,

Finland,

Norway

AS

:

Australia

BS

:

UK

IL

:

Italy

SI.

HK

:

Singapore,

Hong

Kong

UL.

LO.

CSA:

USA,

Taiwan,

Canada

8

CIRCUIT

DIAGRAM

+23V

Oe

UL

C531

R549)

27K

0.33u

0

Tu

5.7)

REO

ad

°

INFRASONIC

a

8

FOR

SI

HK

nm

Oo

wo

UU

oh23V

2A

9.9

0

INFRASONIC

tA

470P

TUNER

6800U

35V

FOR:EC.AG(AS

8S)

479

5P

i)

475

25V

LOUDNES

ZENER

23V

7

oO

4

uw

re

a

re

a+

x

PARTS

LIST

Tue

AL

al

SSL

90—1057

High

Level

Pre-Amp

Section

|

ITEM

PARTS

NO

DESCRIPTION

Q’

TY

|

SYMBOL

NO

ITEM

PARTS

NO

DESCRIPTION

QTY

|

SYMBOL

NO

1

16-%C331J

CARBON

RES.

330

OHM

4W

+—5%

2

R643,

644

2

16—4%C5R6J

CARBON

RES.

5.6

OHM

4W

+

—

5%

1

R701

16—%C224J

CARBON

RES.

220K

OHM

%W

+

—

5%

2

RS11,

512

3

16—%C100J

CARBON

RES..10

OHM

%4W

+

—

5%

2

R641,

642

16—%C392J

CARBON

RES.

3.9K

OHM

4W

+

—

5%

2

R521,

522

4

16—%C101J

CARBON

RES.

100

OHM

4%W

+

—

5%

5

R617,

620, 629,

630,

706

16—%C561J

CARBON

RES.

560

OHM

%W

+

—

5%

2

R513,

514

|

5

16—%C102J)

CARBON

RES.

1K

4W+—5%

4

R601,

602,

703,

704

16—%C562J)

CARBON

RES.

5.6K

OHM

%W

+

—

5%

4

R515—516

6

16—%C103J

CARBON

RES.

10K

%W

+

—

5%

3

R529,

530,

705

16—%4C821J

CARBON

RES.

820

OHM

AW

+

—

5%

2

R519,

520

7

16—%C104J

CARBON

RES.

100K

%W

+

—

5%

4

|

R533,

534, 541,

542

17—0.63E107Y

ELEC

CAPA

100UF

6.3V

+

50

—

10%

2

C509,

510

8

16—%4C152)

CARBON

RES.

1.5K

OHM

%W

+

—

5%

2.

|

R611,

612

17—2.5E476Y

ELEC

CAPA

4.7UF

25V +75

—10%

—

4

C515,

506,

513,

514

9

16—%C153)

CARBON

RES.

15K

OHM

%4W

+

—

5%

4

R523—526

17—5D101K

CER.

CAPA

100PF

+

—

10%

50V

2

C507,

508

10

16—%C155J

CARBON

RES. 1.5M

OHM

%W

+

—

5%

2

R531,

532

17—5D102M

CER.

CAPA

1000PF

+

—

20%

50V

2

C515,

516

11

16—%C221J

CARBON

RES.

220

OHM

%W

+

—

5%

4

R609,

610,

631,

632

17—5D220K

CER.

CAPA

22PF

+

—

10%

50V

2

C511,

512

12

16—4%4C222J

CARBON

RES.

2.2K

4W

+

—

5%

4

R607,

608,

621,

622

19-1057

P.C.B.

1

13

16—%C2733

CARBON

RES.

27K

%W

+

—

5%

4

R549,

550,

507,

508

29-4059

VOLUME

CONTROL

100KB

x

2

1

14

16—%C331J

CARBON

RES.

330

OHM

%W

+

—

5%

4

R615—618

30—2096

TRANSISTOR

BC556

2

Q503,

504

15

16—%C332)

CARBON

RES.

3.3K

OHM

%W

+

—

5%

1

R702

30-2101

TRANSISTOR

2SC1571G

2

Q501,

502

16

16—%4C3903

CARBON

RES.

39

OHM

%4W

+

—

5%

2

R539,

540

17

16—%C391J3

CARBON

RES.

390

OHM

4W

+

—

$%

2

R605,

606

18

16-%C392)

CARBON

RES.

3.9K

OHM

%W

+

—

5%

2

R535,

536

19

16—%C393J

CARBON

RES.

39K

OHM

%4W

+

—

5%

2

R603,

604

13-6004

3

20

16—%4C472)

CARBON

RES. 4.7K

OHM

%W

+

—

5%

8

R501—506,

623,

624

16—%C101J3

CARBON

RES.

100

OHM

%W

+

—

5%

2

R807,

808

21

16—%C474]

CARBON

RES.

470K

OHM

4%W

+

—

5%

4

R551,

552,

547,

548

16—%C103J

CARBON

RES.

10K

%W

+

—

5%

4

R809—812

23

16—%4C562J

CARBON

RES.

5.6K

OHM

%W

+

—

5%

6

R509,

510,

545,

546,

537,

538

16—%C104J

CARBON

RES.

100K

OHM

%W

+

—

5%

2

R805,

806

23

16—%C563)

CARBON

RES.

56K

OHM

%4W

+

—

5%

)

R543,

544

16—%C123J

CARBON

RES.

12K

%W

+

—

5%

2

R813,

814

24

16—%C681J)

CARBON

RES.

680

OHM

%W

+

—

5%

p)

R625,

626

16—%C473J

CARBON

RES.

47K

‘AW

+

—

5%

2

R801,

802

25

16—%4C682J

CARBON

RES.

6.8K

OHM

%W

+

—

5%

2

R627,

628

16—%4C334J

CARBON

RES.

330K

4W

+

—

5%

2

R804,

803

26

16—%C822)

CARBON

RES. 8.2K

OHM

4W

+

—

5%

2

R627,

628

17—1E106Y

ELEC

CAPA

10UF

10V

+

50

—

10%

2

R803,

804

27

16—1002

0.47

OHM

+

—

5%

2W

MPC

70

4

R635—638

17—2.5E475Y

ELEC

CAPA

4.7UF

25V

+

75

—

10%

2

C801,

802

28

16—2A100K

METAL

OXIDE

RES.

10

OHM

2W

+

—

10%-

2

R639,

640

19-1058

P.

C. B.

(METER

DRIVER)

1

29

17—0.63E107Y

ELEC

CAPA

100UF

6.3V

+

50

—

10%

ye

C621,

622

29—4023-1

SEMIFIXED

RES.

20KB

D

30

17-2.5E475Y

ELEC

CAPA

4.7UF

25V

+

75

—

10%

6

C523,

524,

527,

528,

601,

602

30-1019

DIODE

BAW62

4

D801—804

31

17—0.63E476Y

ELEC

CAPA

47UF

6.3V

+

50

—

10%

2

C605,

606

30-2090

TRANSISTOR

BC546

2

Q801,

802

32

17—2.5E476Y

ELEC

CAPA

47UF

25V

+

50

—

10%

4

C707—710

33

17—3.5E107Y

ELEC

CAPA

100UF

35V

+

50

—

10%

4

C623—626

34

17-3.5E108Y

ELEC

CAPA

1000UF

35V

+

50

—

10%

1.

|C703

16—%C1013

CARBON

RES.

100

OHM

“W

+

—

5%

4

R405,

406,

431,

432

35

17—3.5E476Y

ELEC

CAPA

47UF

35V

+50

—10%

2

C611,

612

16—%4C102J3

CARBON

1K

YW+—

5%

4

R425—428

36

17—3.5P688Y

ELEC

CAPA

6800UF

35V

2

C701,

702

16—%C105J

CARBON

-IM%W+

—

5%

2

R417,

418

37

17-5D101K

CER.

CAPA

100P

+

—

10%

50V

4

C613,

614,

617,

618

16—%4C106J

CARBON

.

10M

%4W

+

—

5%

2

R411,

412

38

17-5D103M

CER.

CAPA

0.01UF

+

—

20%

50V

>

C704,

705

16—%C162J

CARBON

1.6K

YW

+

—

5%

2

R413,

414

39

17—-5D104M

CER.

CAPA

0.1UF

+

—

20%

50V

4.

|

C619,

620,

627,

628

16—%C221J

CARBON

.

220

OHM

%W

+

—

5%

2

R423,

424

40

17—5D201K

CER.

CAPA

200PF

+

—

10%

50V

2

C603,

604

16—%4C222J

CARBON

2.2K

YW

+

—

5%

2

R409,

410

41

17—-5D220K

CER.

CAPA

22PF

+

—

10%

SOV

2

C525,

526

16—%C331J

CARBON

.

330

OHM

%W

+

—

5%

2

R419,

420

42

17-5D470K

CER.

CAPA

47PF

+

—

10%

50V

2

C609,

610

16—%4C333J)

CARBON

33K

YW

+

—

5%

2

R429,

430

43

17-5D471K

CER

CAPA

470PF

+

—

10%

50V

°

2

C501,

502

16—%C334J)

CARBON

.

330K

%4W

+

—5%

2

R433,

434

44

17—5F103M

MYLAR

CAPA

0.01UF

50V

+

—20%

2

—°|C615,

616

16—%C392J

CARBON

3.9K

YW

+

—

5%

2

R407,

408

45

17-5F104J

MYLAR

0.1UF

2

C623,

624

16—%4C474]

CARBON

.

470K

%W

+

—

5%

2

R401,

402

46

17—5F152)

MYLAR

CAPA

0.0015UF

S0V

+

—

5%

”)

C521,

522

16—%C563)

CARBON

56K

4W

+

—

5%

2

R403,

404

47

17-5F154K

MYLAR

CAPA

0.15UEF

50V

+

—

10%

2

-}

C503,

504

16—%C820J3

CARBON

RES.

82

OHM

%4W

+

—

5%

2

R421,

422

48

17—-5F274K

MYLAR

CAPA

0.27UF

50V

+

—

10%

2

C533,

534

16—%C823J)

CARBON

RES.

82K

OHM

%4W

+

—

5%

2

R415,

416

49

17—-5F334K

—

MYLAR

CAPA

0.33UF

50V

+

—

10%

2

C531,

532

17—0.63E476Y

ELEC

CAPA

47UF

6.3V

+

50

—

10%

6

C413—-418

50

17—5F473J

MYLAR

CAPA

0.047UF

50V

+

—

5%

4

C517—520

17—25E475Y

ELEC

CAPA

4.7UF

25V

+

75

—

10%

2

C421,

422

51

17-5F822J

MYLAR

CAPA

0.0082UF

50V

+

—

5%

2

C529,

530

17—2.5E106Y

ELEC

CAPA

10UF

25V

+

50V

—

10%

2

C401,

402

52

19-1056

P.

C.

B.

(MAIN

AMP)

1

|

17—5D100K

CER.

CAPA

10PF

+

—

10%

50V

2

C411,

412

53

29-1040

INDUCTOR

0.6

x

15T

3,

L601,

602

17—5D101K

CER?

CAPA

100PF

+

—

10%

50V

2

C419,

420

54

29-4028.

VOLUME

CONTROL

GM

70E—SOKB

x

2

17-5D102M

CER.

CAPA

1000PF

+

—

20%

50V

4

C423—426

55

~

29-4045

VOLUME

CONTROL

VM10E-—250KW

1

17—5D500K

CER.

CAPA

50PF

+

—

10%

50V

)

C403,

404

56

30-2115

TEANSISTOR

2N6552

4

Q607—610

17—5F1023

MYLAR

CAPA

0.001

UF

50V

+

—

5%

2

C405,

406

57

30-1002

DIODE

IN4002

a

D703,

704

17—5F152J

MYLAR

CAPA

0.0015UF

50V

+

—

5%

4

C407—410

58

30-1016

ZENER

DIODE

23V

0.5W

a

D707,

708

18—1004—8

CORE

ASS’Y

2

59

30-1017-1

DIODE

GI3B

4

D701—704

19-1062

P.

C.

B.

(EQ)

2

60

30-1019

-

DIODE

BAW

62

6

D601,

602,

605—608

30—2084—3

TRANSISTOR

BC549

5

Q403,

404

61

30-1024

VARISTOR

SV04

2

D604,

603

30—2085—2

TRANSISTOR

BC546B

>

Q401,

402

62

30—2004R

TRANSISTOR

2N3055

2

Q613,

614

30—2090—2

TRANSISTOR

BC546B

2

Q409,

410

63

30-2077

TRANSISTOR

2SC1384Q

1

Q701

30-2096

TRANSISTOR

BC556A

4

Q405--408

64

30-2081

TRANSISTOR

2AS608E

6

Q601—604,

617,

618

65

30-2096

TRANSISTOR

BC556

3

Q507,

508,

702

66

30-2101

TRANSISTOR

2SC

1571G

4

Q505,

506, 605,

606

12—2007

SPEAKER

TERMINAL

SOCKET

2

67

30—2114M

TRANSISTOR

MJ2955

mo

Q615,

616

12-2008

PHONE

JACK

1

68

30-2116

TRANSISTOR

2N6555

2

Q611,

612

12—2015

DIN

JACK

1

69

30-1024

SELECTOR

SW.

SRZ—V044N

(12.5)

1

16—%C224J

CARBON

RES.

220K

+

—

5%

%W

p

R555,

556

70

31-1040)

PUSH

SW.

5

KEY

2U

1

16—%C154J

CARBON

RES.

150K

+

—

5%

%W

5

R553,

554

71

31-1051

ROTARY

SW.

SRZ—V043

(12.5)

1°

19-1047

PCB

1

:

-

72

16—-%4C183J

CARBON

RES.

18K

OHM

%W

+

—

5%

2

R545,

546

31—1025T

PUSH

SWITCH

2

KEY

1

73

16—%4C3333

CARBON

RES.

33K

OHM

%W

+

—

5%

2

R613,

614

35-1013

POWER

METER

2

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