Nad C740 User manual

=

er

N

Ф,

ЗТЕВЕО

RECEIVER

«ЕТЕНЕ

014315

чупмум

зоілнає

МИ

ДЕ

2

№

SERVICE

SAFETY

PRECAUTIONS

.

Replacing

the

fuses

CAUTION:

FOR

CONTINUED

PROTECTION

AGAINST

THE

RISK

OF

FIRE

REPLACE

ONLY

WITH

SAME

TYPE

OF

FUSE.

Reference

No.

Part

No.

Description

F901*AH

252161

3A-125V

ЦІ

/Т-237

Time

lag

F901*B1,

В,

С

252074

T2A

L/250V

SE-EAK

Time

lag

NOTE:

«ЖАНУ

:

Ц.

S.

A,

CANADIAN

MODEL

ONLY.

<*В1>:

AUSTRALIAN

MODEL

ONLY.

Оо»

:

EUROPEAN

MODEL

ONLY.

<*B>

:

U.K.

MODEL

ONLY.

.

SAFETY

CHECK

OUT

(Only

U.S.A.

model)

Before

returning

the

product

to

the

customer,

make

leakage

current

or

resistance

measurements

to

determine

that

exposed

parts

are

acceptably

insulated

from

the

supply

circuit.

Parts

marked

with

the

symbol

А

are

critical

with

regard

to

the

risk

of

fire

and

electric

shock.

Replace

only

with

parts

recommended

by

the

manufacturer.

CONTENTS

DESCRIPTION

PAGE

SERVICE

SAFETY

PRECAUTIONS

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DESCRIPTION:

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PARTS

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DIAGRAM/PARTS

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27

WARNING:TO

PREVENT

FIRE

OR

ELECTRIC

SHOCK,

DO

NOT

EXPOSE

THIS

APPLIANCE

TO

RAIN

OR

MOISTURE.

FRONT

PANEL

CONTROLS

11

12 13

14

15 16

17

18

AMITM

BANK

PRESET

BLEND

muon

ПЫ

PRINT

CHARACTER

00000000

DELETE-

7.

BASS

&

TREBLE

CONTROLS

8.

BALANCE

9.

TONE

DEFEAT

10.

INPUT

SELECTORS

11.

AM/FM

12.

BANK

1.

POWER

ON/OFF

2.

SPEAKERS

A

3.

SPEAKERS

B

4.

STANDBY

INDICATOR

5.

HEADPHONE

SOCKET

6.

VOLUME

The

lightning

flash

with

arrowhead,

within

an

equilateral

tri-

angle

is

intended

to

alert

the

user

of

the

presence

of

unin-

sulated

"dangerous

voltage"

within

the

product's

enclo-

Sure;

that

may

be

of

sufficient

magnitude

to

constitute

a

risk

of

electric

shock

to

persons.

20

©

NAD

1888

C740

18.

CHARACTER

19.

TUNE/PRESET

20.

DISPLAY

PANEL

13.

SEARCH/PRESET

14.

BLEND

15.

MEMORY

16.

FH

MUTE/MODE

17.

PS/RT

(RDS

Version)

or

DISPLAY

(non-RDS

version)

The

exclamation

point

within

an

equilateral

triangle

is

intend-

ed

to

alert

the

user

of

the

presence

of

important

operating

and

maintenance

(servicing)

instructions

in

the

literature

accompanying

the

appliance.

REAR

PANEL

CONNECTIONS

11

1.

DISC

INPUT

-

4.

AUX

INPUT

7.

PRE

OUT

2.

CD

INPUT

5.

ТАРЕ

1

IN/OUT

8.

MAIN

IN

11.

3.

VIDEO

INPUT

6.

TAPE

2

IN/OUT

-3-

9.

АМ

ANTENNA

12.

SPEAKERS

А

“В

$

NAD

1998

C740

10.

FM

ANTENNA

(F-type

terminal

for

AH,

DIN

for

В,

ВІ,

22

13.

NAD

LINK

IN,

OUT

14.

AC

LINE

CORD

SOFT

CLIPPING

CONNECTION

OF

INSTRUMENT

FM

Ad

justment

Antenna

|

Output

FM

Signal

Generator

AC

Voltmeter

or

Osci

|

foscope

Distortion

Analyzer

Digital

DC

Voltmeter

FM

Stereo

Adjustment

External

Antenna

Output

Modulation

|

Terminal

FM

Signal

Generator

AC

Voltmeter

or

Osci

|

loscope

FM

Stereo

Моди

ator

Distortion

Analyzer

AM

Adjustment

60cm

AM

Loop

Antenna

(Accessory)

AM

Signal

Generator

AC

Voltmeter

or

Osci

|

loscope

Digital

DC

Voltmeter

Adjustment

Point

RF

PCB

NARF-6366

Р141

(АМ

Test

point)

5

зді

Connect

to

DC

чоњ]

со

EO)

GND

2

R165

А

V

L102

L101

I

Main

circuit

PCB

NAAR-6359

ALIGNMENT

PROCEDURE

1.

FM

Adjustment

4

а.

Set

the

unit's

frequency

to

99.0MHz.

b.

Connect

a

dc

volt

meter

with

P141.

c.

Set

FM

MUTE/MODE

SW

(S717)

to

stereo.

d.

Set

SSG(Standard

Signal

Generator)

frequency

to

99.0MHz,

output

to

6088

и

V

and

connect

to

75

ohm

antenna

terminal.

е.

Turn

the

core

of

L101(NFIF-4087)

so

that

the

voltage

can

be

within

--20mV.

f.

Turn

the

core

of

L102(NFIF—4088)

зо

that

mono

distortion

goes

minimum.

£.

Repeat

above

items(e

&

f)

a

few

times.

h.

Connect

a

Frequency

counter

with

P161.

|

i.

Turn

R176

so

that

the

frequency

сап

be

within

19kHz

=

10Hz.

j.

Set

the

output

of

SSG

to

stereo.

К.

Turn

IFT

in

the

frontend(U101)

within

+180

degrees

so

that

stereo

distortion

can

be

minimum.

|.

Adjust

R165

and

get

maximum

stereo

separation.

m.

Set

SSG

output

to

17dBuV.

n.

Adjust

R153

so

that

STEREO

indicator

turns

ON.

As

a

optional

method,

judging

by

wave

form

is

admitted.

o.

Repeat

above

items(m

and

n)

a

few

times.

<AH>

model

Tunin,

Output

Digital

DC

530kHz

voltmeter

600kHz

AC

i

400Hz

30%

mod.

1600kHz

voltmeter

IRF

Block

і

1105

АС

400Hz

30%

mod.

|990КН2

voltmeter

{L106

Reference

Specification

FM

tuned

voltage

87.50MHz~

108.00MHz

More

than

1.2V~Less

than

10V

AM

tuned

voltage

530КН2

~

1710kHz

Adjustment

5

Point

Adjust

for

1.3V

Less

than 9.0V

Tuning

Output

Frequency

|Indicator

522kHz

OSC

coil

on

1.3V+0.2V

603kHz

AC

RF

coilon

|

2

603kHz

voltmeter

|RF

Block

Maximum

AC

999kHz

voltmeter

|1106

Maximum

or

581kHz

{voltmeter

L105

Reference

Specification

FM

tuned

voltage

87.50MHz~

108.00MHz

More

than

1.2V

~

Less

than

10V

AM

tuned

voltage

522kHz~

1611kHz

1.3V

—

Less

than 9.0V

2.

AM

Adjustment

1.3V+0.2V

Maximum

Adjustment

Point

OSC

coil

on

«C,

B,

B1?

models

[Step

[AM

SG

output

3.

POWER

AMP

ADJUSTMENT

Idle

Current

й

a.

By

adjusting

R534

and

R634,

set

the

voltage

between

test

points

P531

and

P631

to

6.0mV

=

1.0mV

immediately

after

the

power

is

switched

on.

b.

After

4

~

6

minutes

with

the

power

on,

readjust

R534

and

R634

to

5.0mV

x

1.0mV.

Offset

Voltage

a.

After

4

~

6minutes

with

the

power

on,

adjust

R544

and

R644

to

OmV

3:20mV.

us

SPECIFICATIONS

Test

conditions

(D

Power

Supply

Voltage

&

Frequency

|

(6)

Modulation

А

АН

Туре

120М

/

60Hz

ЕМ

Мопо

75.0kHz

Deviation

(Mod.=1kHz)

C,B,B1

Type

.230V

/

50Hz

Stereo

L

+

R=

67.5kHz

Deviation

(Mod=1kHz)

Pilot

=

7.5kHz

Deviation

(19kHz)

(2)

Load

Resistance

RDS

=

1.0kHz

Deviation

(57kHz)

Speaker

Terminal

8

ohms

/4

ohms

AM

400Hz,

30%

Other

Terminal

47kohms

:

©

Reduce

the

following

value

from

signal

generator

FM

75

ohms

OdB

(8)

Temperature

&

Humidity

300

ohms

-1248

Temperature

.

5

~

35

°С

AM

Loop

Antenna

-26dB

Humidity

45

~

85

€

RH

@

Standard

Knob

and

Switch

Position

($.К.Р.)

a.

Master

Volume

Control

Maximum

Ё

Tape

Monitor

OFF

b.

Bass

Control

Center

g.

Muting

OFF

c.

Treble

Control

Center

h.

Speaker

A

ON

,B

OFF

d.

Balance

Control

Genter

i.

Soft

Clipping

|

OFF

e.

Input

Selector

CD

і.

Tone

Defeat

|

OFF

Available

Remote

Control

Unit

:

RC—

450S

FAUDIO

SECTIONJ

Max.

Power

1kHz/20kHz/20Hz

L,R-ch

(Sel:CD)

35W

min.

L/R

Both

Channel

Driven

Only

Variable

8Q

Load

Both

Channel

Driver

1kHz/20kHz/20Hz

L,R-ch

(Sel.:CD)

35W

min.

L/R

40

Load

Only

Variable

Line

Separation

100Hz

-

17dBV

55.0

dB

min.

L/R

The

Reverse

Channel

10kHz

-

17dBV

350

dB

min.

L/R

Terminated

with

5.1kohm

Нит

&

Noise

`

CD

No

Signal

S.K

P.

-55.0

dBV

L/R

Terminated

With

5.1kohm

Volume:Min.

-60.0

dBV

L/R

Terminated

With

5.1kohm

Bass

Min.

100Hz

-10dBV'

Vol:Mech.Center

-

60

+

1.5

dB

Bass

/

Min.

Bass

Max.

100Hz

-104ВУ"

Vol:Mech.Center

+

60

+

1.5

dB

Bass/Max

‘Treble

Min

10kHz

-10dBV

-

7.5

+

1.5

dB

Treble/Min.

Treble

Max.

10kHz

-10dBV'

Vol:Mech.Center

+

7.5

=

1.5

dB

Treble/Max.

ГАМ

SECTIONJ

|

Tuning

Range

Fmin.

AH

/

C,

B,

Bi

.

530/

522

kHz

Freq.

Step:

AH/O,

B,

ВІ

=

10/9

kHz

:

Fmax.

AH

/

С,

B,

B1

1

1710

/

1611

kHz

Changing

the

AM

band

step

|__|

to

10kHz

step|

to

9kHz

step!

Maximum

Sensitivity

603,

990,

1404

kHz

60dB/m

max.

|

(600,

990,

1400)

Input=60dB/m

|

Usable

Sensitivity

603,

990,

1404

kHz

15dB

min.

(600,

990,

1400)

40dB

min.

Image

Rejection

Ratio

1404/1400kHz

28dB

min.

IF

Rejection

Ratio

|

600/603kHz

244В

min.

Selectivity

990-t9kHz

24dB

min.

Fixed

Output

Level

990kHz

100mV

min.

Input=100dB/m

ГЕМ

SECTION]

|

Tuning

Range

Fmin.

87.5

MHz

Freq.

Step(Manual:25KHz)

Fmax.

108.0

MHz

Auto:AH/C,

B,

B1=100/50KHz

Usable

Sensitivity

87.5,98,108

MHz

30dB

min.

Input=12dB

и

3dB

Limited

Sensitivit

98МН2

6dB

и

тах.

image

Rejection

Ratio

108MHz

35/75dB

min.

(AH/

О,

B,

B1)

IF

Rejection

Ratio

|

90MHz

-

704В

піп.

Selectivity

98MHz

40/65dB

min.

(AH/

C,B,B1)

Signal

to

Noise

Ratio

98MHz

64dB

min.

Inputz60dB

и

V

Fixed

Output

Level

98МН2

AH

550

=

200mV

Input-60dB

и

св

750+

250mV

[FM

STEREO)

А

Віепа

98MHz

(L/R

Separation

at

Blend

ON)

13::34В8

Input=60dB

и

mod.-1kHz

Muting

98MHz

Width

35:-10kHz

|

Adjust

L102

Depth

:

35

dBu

max.

Audition

Input=60dB

и

:

1KHz

deviation

мә

t

PC

board

ircu

NARF-6366

RF

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PC

board

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circu

U10

:

NADG-6368

NAD

link

PC

board

U13

:

NAETC-6373

LED

PC

board

U07

itch

PC

board

NASW-6369

Power

sw

U11

б

55

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NADIS-6365

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/

Druck

1

U04

:

NAETC-6362

Speaker

terminal

PC

board

006

:

МАЕТС-6364

Transformer

РС

board

U01

:

NAAR-6539

Main

circuit

PC

board

U14

:

NAETC-6513

Sub

PC

board

UO3

:

NAFF-6361

Control

circuit

PC

board

UO5

:

NAETC-6363

Head

phone

РС

board

902

:

NAPS-6360

Sub

power

supply

PC

board

NAD-00122

/

Druck

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DATA

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2K

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МААР-6361

.THE

COMPONENTS

IDENTIFIED

ВУ

MARK

/\

ARE

CRYTICAL

FOR

SAFETY.

REPLACE

ONLY

WITH PART

NUMBER

SPECIFIED.

.ELECTROLYTIC

CAPACITORS

(-И-

)

ARE

IN

uF/WV.

-ALL

CAPACITORS

ARE

ІМ

pF/SOVV

UNLESS

OTHERWISE

NOTED.

EX)

030

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3pF

330

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33pF

331—

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333—

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SUBJECT

TO

CHANGE

FOR

IMPROVEMENT.

2.2

100/16

CAUTION

FOR

CONTINUED

PROTECTION

AGAINST

FIRE

HAZARD,

REPLACE

ONLY

WITH

FUSE

OF

SAME TYPE

А

AND

RATING

INDICATED.

ATTENTIION

|

AFIN

D'ASSURER

UNE

PROTECTION

PERMANENTE

CONTRE

LES

RISQUES.

D'INCENDIE.

REMPLACER

UNIQUEMENT

PAR

UN

FUSIBLE

DE

MEME

TYPE

T

CALIBRATION

COMME

INDIOUE.

THIS

SYMBOL

LOCATED

NEAR

THE

FUSE

INDICATES

THAT

THE

FUSE

USED

15

SLOW

OPERATING

TYPE

FOR

CONTINUED

PROTECTION

AGAINST

FIRE FUSE

HAZARD,

REPLACE

WITH

SAME

TYPE

FUSE.

FOR

FUSE

RATING

REFER

TO

THE

MAKING

ADJACENT

10

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SYMBOL

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NAD C740 User manual

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