NAD 705 Service manual

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705

RECEIVER

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CONTENTS

Page

4

5
6-7

8

9

10

11-12
13-14

15-16
17-18
19-20
21-22
23-24

Service
Specifications
Rear/Front
Remote
TunerAdjustment
MainAdjustment

Instrumentation
Adjustment
Main

MainPCB Layout

TunerSchematic

Tuner
Front

Instruction

Panel

Control

Procedure

Schematic

&

Front

Schematic

Transmitter

Points
Points
ConnectionDiagram

Diagram

Diagram

Layout

PCB

Diagram

25-26
27-28

29-30
31-32
33-34
35-47

48
49

50
51

IC

Block

Wiring

Wiring
ExplodedView
Exploded
Electrical
Troubleshooting

Packing
PackingList
Notes

Diagram
Diagram
Diagram

ViewParts

Diagram

Parts

(A)
(B)

List

List

Guide

Service

Instructions

REMOVE

TO

1.Remove
(See

2.Remove
Top

3

.

figure

cover

TOP
4

S

COVER

screws

:[)

screws

can

now

(A)
(B)

be

from
from

removed

the
the

left
rear

.

and

right

panel.(See

sides

figure

of

the

II)

top

cover

.

SPECIFICATIONS

NAD

Standard
Reference
AM Antenna
FM Antenna
FM

AM

Tuning
20dB
S/N

T

AM

FM

TuningRange
Intermediate
50dB
IF

S/N
MPX Separation
MPX

FM

705

Standard

TUNER

Range

Intermediate

Quieting

IF

Rejection

Ratio1.OmV

.H.D.1

Stop

.OmV

Sensitivity

TUNER

Quieting

Rejection

Ratio
S/N

Ratio

Stop

Sensitivity

STEREO

Test

Output:1

:
:

1mV

Conditions

Firsthand
75

ohm

Signal:1

SECTION

Frequency

Sensitivity

Input

Input

SECTION

Frequency

Sensitivity
Input

(At1kHz)

1mV

RECEIVER

.OW

Into

Input

Balanced

kHz,

Sensitivity

(At

75

kHz

(At

8

ohmLoad

75

kHz

1000 kHz)

DEV

.

98

MHz)

Deviation

At

98

522
450

5uV

.

35dB
50dB
0

.3Z

50dB

88

MHz-108MHz

10

.7

.1.4mV

90dB
80dB

50dB

77dB

30dB

MHz

kHz-1611
kHz

MHz

kHz

(520

kHz-1610

kHz)

PRE-AMPLIFIER

Sensitivity

Frequency
Loudness

Volume=30dB
Base

Midrange

POWER

RatedT
Channel
Sensitivity
Frequency

Ratio

S/N
Damping

0

.032

Control

1

AMPLIFIER

.H.D

Separation

Factor

T

.H.D

Response

Response

1W

PHYSICAL

Width

Net
Supply

x

Weight

Voltage

Height

SECTION

At

1

kHz

Output=lV

(20 Hz)
(20

kHz)

Boost
Cut

Boost
Cut

(50
(50
(10
(10

SECTION

.

(At

At

1

kHz For

20 Hz
50-20

Output

.

PowerOutputAt

At 50

A-WTD

Hz,

SPECIFICATIONS

x Depth

Hz)
Hz)

kHz)
kHz)

10 kHz)

40WOutput
kHz
output=lW

8

ohmLoad 44W

180mV

OdB
+12dB
+4dB
+9

.

-9.5dB

+7

.

-7.OdB

O

1
+odB/-1
0±0

.

-102dB

70

42x9

16
6kg
AC
AC

.5dB
.OdB

.O1Z

70dB

.05V

.5x3

.5dB

.5x28
(13

230V,

115V,

.OdB

.7xll

.2

.5

lbs)
50Hz
60Hz

cm

.2

inch

(For

UK,

(For UL

VDE,

Version)

SAA

VERSION)

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REAR

WARNING:TO
SHOCK,

TO

L

R

PRONO

RAIN

PR

G N

DO

NO

CO

PANEL

NOT

OR

MOISTURE

FM

750

ANTENNA

VIDEO

SOUND

CONNECTIONS

PREVENT

EXPOSE

.

G

I

TAPE

AUX

IN

FIRE

OR

THIS

1TAPE

OUT

IN

ELECTRIC

APPLIANCE

MULTI

2ROOMPREMAIN

OUT OUT

OEM

OEM

OUT

IN

OUT

L

.

R

0M

IN

SOFT

.

CLIPPING

NAD

ON

nlalaln

OFF

yyyy

A

N

+

B

MIMI

III

The

lightning

flash

with

triangle,isintendedtoalert

unnsulated

sure:that

maybeof

riskofelectric

REAR

1.AM

2.FM

arrowhead

dangerousvoltage

shocktopersons

PANEL

ANTENNA
ANTENNA

3.PHONOGROUND

4.PHONOINPUT

5.CD

6.VIDEO
7
8

.
.

AUX
TAPE

INPUT

SOUND

(AUXILIARY

1

IN/OUT

within

.

the userofthe

sufficient

within

magnitudetoconstitute

CONNECTIONS

TERMINALS

INPUT

.

.

.

INPUT

.

10

an

equilateral

presence

the

.

.

INPUT)

products

.

.

12

of

enclo

a

9.TAPE

2

10.MULTI-ROOM

11.PREAMP

12.NAD

LINK

13.SOFTCLIPPING

14."A"

15."B"

SPEAKERTERMINALS
SPEAKERTERMINALS

16.AC POWERCORD

17.AC

OUTLETS

The

exclamation

to

alert

maintenance

accompanying

IN/OUT

OUT/MAIN

IN/OUT

the

userofthe

.

OUTPUT

.

.

point

withinanequilateral

presenceofimportant

(servicing)

Instructionsinthe

the appliance

.

IN

.

.

.
.

triangle

operating

literature

is

intended

16

and

FRONT

PANEL

FRONT

1.POWER

2.PHONES
3

4.BASS

5.TREBLE

6.BALANCE

7.UP/DOWNTUNING

PANEL

A/B

.

CONTROLS

.

.

SPEAKERSELECTOR

.

.

.

8.AM/FM
STORE

9

.

.

.

10.TUNING
11

.

LISTEN

12

.

RECORD

13.MONO

14.LOUDNESSCOMPENSATION

15.VOLUME

16.DISPLAY

.

SELECT
PRESET

MODE

(CHOOSE
(CHOOSE

.

.

.
.

.

INPUT
INPUT

FOR
FOR

.

LISTENING)
RECORDING)

REMOTE

CONTROL

TRANSMITTER

REMOTECONTROL

Since

the

705

buttons

are

remoteisa

arranged

by

product

multi-product

category

.

controller,

its

RECEIVER

1.Power
Power

switchonthe

leaving

2.Speakers
speakers

3

.

SpeakersB.
speakers
4

.

Mute.Presstoshut

wanttoanswer
stillbeaudible.)Press

previous

5.Preset
numbered

6.Search
frequency

7.Tune
steps.These

are

storing

8.Volume
to

rotate the

9.Numeric
preset

tell

the

tuning
and

3to5

is

invalid

will

not

10.Enter
entry

.

11.Input

Tape2,CD).These

CONTROLS

.This

button

On/Off

buttononthe

power

the

receiverinStandby

A

.

.
.

the

volume

level

Up/Down

preset
Up/Down

and

stopsatthe

Up/Down

buttons

frequenciesinthe

Up/Down

receiver's

Keypad

numberora
receiver

logic

digit

(e .g.a

change

.

Select

that

recognizes

numbers

preset
.

Press

duplicates

front

.

Press

againtoswitch
Presstoengage
Presstoengage

telephone

MUTE

.

.

station

.

Auto-seek

.

Tunesupor

also

.

These
Volume

(0 to 9).Press these

tuning

you have

as

number

this

buttontocomplete

(FM,

white

mode

off

the

sound

for

example.(A

againtorec'nre

Skipstothe
.

next

strong

alter

the

presets
buttons

control

frequency

completed

two-digit

broadcast

above

AM,

Video,

buttons

select

the

function

of

the

receiver.Press

off

.

or

disengage

or

disengage

temporarily.when

little

the

ne~[

higher
tuning;scans
down

preset

.

activateasmall

Then

entriesaspreset

frequencies.If

39).the

Phono,

up

station

.

in

frequencybysmall

number

.

buttonstoenter

press

your

selection.The

tuned

a

numeric

Aux,

the

input

for

of

the

green

the

power

the

the

you

sound

may

soundtoits

or

lower

or

down

when

you

motor

ENTER

numbers
the

entry

frequency

keypad

Tape

listening

to

.
A"
B

in

a

to

1,

CD

PLAYER

The

following

on

certain

NAD

20.Stop

21.<<

22.>>

23.CD.Selects

24.Next

25.1«

26.>>I

27.Play/Pause

BATTERIES

be
remote

replaced.The
penlight

operating
lever

When
shown

(Scan
(Scan

(Skip
(Skip

Batteries

used.In

commands,

cells

To

open
between

installing

on

.

Back)
Forward)

Disc.Selects

Back)
Forward)

.

must be

the

Alkaline

.

life

.

the

battery
the

diagram

the

CONTROLS

buttons

operate

compact

.

future,ifthe

unit

freshAAcells,

disc

.

.

the

receiver'sCDinput

the

next

.

.

installed

the

batteries

requires

cells

are

compartment,

ribbed

areas on

within

the

corresponding

players

.

for

discinaCDchanger

before the
receiver

two1.5-volt

recommended,

take

the

remote

does

maybeweak

press

the

backofthe

caretoorient

compartment

AA-size

the

functions

listening

control

not

respond

and

should

(or

for

maximum

small

release

handset

them

.

TAPE

RECORDERCONTROLS

These

buttons

operate

the

certain

NAD

tape

recorders

12.Stop

13.Rec
14

15.Tape1.
16

17.>>

.

.

can

to

be

R6)

as

18.Pause
19

.

.

(Recording)

.

Tape2.

.<<(Rewind)

.

Play

(Fast

.

Selects

Selects

Forward)

.

.
the
the

.

.

corresponding

.

receiver's
receiver's

Tape2input
Tape1input

functions

for

listening

for

listening

on

.
.







TC404

TUNER

T407

T

Fo-1

T406

me

T408

T409

ADJUSTMENT

SFR402

p

TP2

O

O

(GNO)

OTP4

077

(TUNING)

FL

D

TP1

(VT)

40S

POINTS

TP8

O

SF

R403

E)

TP3

IC403

T404

0

OTP5

O

T403

TC405

10

Wl

T402

L402

T401

O

Figure

1

MAIN

ADJUSTMENT

POINTS

Amplifier

1.Poweroutputoffset adjustment
a.At

speaker

b.AdjustSFR101,let

c.Adjust SFR102,let

2.QuiesentCurrent
a.Allow
b

.

At

c

.

AdjustSFR103,let

d

.

At

e

.

AdjustSFR104,let

open

open
open

Section

load,

switch

at

least

load,DC
load,DC

DC

meter

to

"A"
the
the

Adjustment

3

minutes

meter
meter

position
reading
reading

the
the

connected

connected
reading
connected
reading

burn

Figure2.

to

speaker

.

as

0+-25mV

as

0+-25mV

in

before

to

CN-15

as4.4mV.(I=20mA,+-5mA),(L-channel)

to

CN-14

as4.4mV.(I=20mA,+-5mA),

terminal

.(L-channel)
.(R-channel)

performing

base.(Fig.2)
base.(Fig

A,

.

(Fig
(Fig.2)

.

this

2)

.

adjustment

(L-channel)

2)

.

(Fig.11)

(Fig.11)



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

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



SPEAKER

INSTRUMENTATION

DC

TERMINAL

AM

STANDARD

0

A

SIGNAL

0

TAPE1OUT2

METER

Figure

GEN

0
00

CONNECTIONDIAGRAM

3

00

.

P

+T

AM

ANT

SCOPE

D

IN

00
00

OC

METER

4

D

Figure

Figure

Figure

5

SET

FM

STANDARD

6

FREQUENCY

00

100.7M

SIGNAL

00o
0

TAPE2OUT

n

SET

COUNTER

GEN

0

SCOPE

n

0

0

-FM

ANT

FM

/AM

IN

STANDARD

+

00
00

SIGNAL

GEN

VTVM

7

0000

TAPE 2

SET

FM

OUT

ANT

IN

Figure

8

INSTRUMENTATION

CONNECTION

DIAGRAM

(Cont)

DC

METER

TP1

O

oa

O

TP2

SIGNAL

DISTORTION

TAPE2OUT

SET

FM

GEN

D

ANT

.

METER

IN

AM/FM

Figure

10

S

.G

.

Figure

12

SET

DC

METER

Figure

11

A:AM SECTION

ADJUSTMENT

PROCEDURE

1.V

.C .O

MEASURE

A

.

B.SELECT

CSA)

C.ADJUST

RANGE

ADJUSTMENT

.

AM

.

(522

T406

0

.9

D.SET THE

(1611

KHZ

CHECKTHAT THE

7

.35

V

TO7.65V.

2.SENSITIVITY

A.CONNECT

THAT

THE

B.SET THE

(UL,

C.ADJUST

D.SET

(UL,

E.ADJUST

3.IF

CSA)

T405

THE

CSA)

TC404

TRACKING

THE

VOLTAGEBETWEEN

MODE,

KHZ

AND

UK,

UNTIL

1

TO

UNDER

AY,

.1

V

UNIT

UK,

VOLTAGE

ADJUSTMENT

THE

UNIT

SIGNAL

SIGNAL

(603

SIGNAL

(1404

GENERATOR
KHZ

FOR

GENERATOR

GENERATOR

MAXIMUM

KHZ

FOR

.

SET

AY,

THE

V

.

TEST

EU)

.

UNDER

UK,

UK,

MAXIMUM

TP7

AND

THE

UNITUNDER

EU)

.

VOLTAGEBETWEEN

1610

TO

BETWEEN

KHZ

TP4

.

TEST AS SHOWN

IS

CONNECTED

AND

AY,

OUTPUT

AND

AY,

OUTPUT

UNIT

EU),

UNIT

EU)

UNDER

30dBUv

LEVEL

UNDER
.
.

TP4

(UL,

AND

.

(GROUND)

TEST TO

TP7

AND

CSA)

TP7

IS

IN

FIG.5.MAKE

VIA

A

TEST

.

TEST

520

TP4

IN

22P

TO

TO

.

(FIG

KHZ

IS IN

THE

RANGE

SURE

CAPACITOR

600

KHZ

1400KHZ

4)
(UL,

THE

.

.

A.USING

GENERATOR

SECTION

.C

.O

KHZ

.

(603

B

.

ADJUST

B:FM

1.V

A.CONNECT
B.SET THE

ADJUST

C

.

3 .0

V TO3.1V.

D.SET THE

IS

IN

2.7 .2

MHZ

A.CONNECT

(FIG

7)
B.SET THE
C.ADJUST

THE

TEST

AND

UK,

T407

FOR

.

ADJUSTMENT

A

DC

UNIT

L402

UNTILTHE

UNIT

THE

RANGE

REFERENCE
A

FREQUENCY

.

UNIT

TC405

SET-UP

UNIT

AY,

UNDER

EU),

MAXIMUM

.

VOLTMETER
UNDER

UNDER

22

TEST

TEST
V

FREQUENCY

UNDER
FOR A

TEST TO
MEASUREDFREQUENCY

DESCRIBED

30dBUv

OUTPUT

TO

TO

VOLTAGE

TO

TO

25V.

COUNTER

TEST TO

.

.

AND

TP7

87

.5

MEASURED

108

ADJUSTMENT

TO

MHZ

90

ABOVE

600

TP4

MHZ

FM

(FIG

KHZ

(GND)

MODE

MHZ.CHECK

.

TP5

FM

(FM

MODE

OF

IS

OSC)

100

.

(UL,

IN
THE

.

5)

(FIG

.

AND

.7

THE

SET

CSA)

4)

.

THE RANGE

VOLTAGE

GROUND

+/-

MHZ

SIGNAL

.

MEASURED

3HZ

.

ADJUSTMENT

PROCEDURE

(Cant

.)

3.SENSITIVITY

A.SET THE

CONNECT

SET THE
B.CONNECT
C.ADJUST

GENERATOR

4.IF

TRACKING

A.SET

60

dBuV

B.MEASURE
C.ADJUST

D.MONITOR
E.ADJUST

THE

SIGNAL
THE

SIGNAL
AN

7401,

OUTPUTLEVEL

SIGNAL

.

THE

T408

THE

T409

F.REPEATFROM

ACHIEVED

5.SIGNAL

A.SET THE

60

dBuV

.

METERADJUSTMENT

SIGNAL

.

B.ADJUST SFR402

LIGHTS

UP

.

ADJUSTMENT

GENERATOR

SIGNAL

GENERATOR

GENERATOR

OSCILLOSCOPE

T402,

T403

.

GENERATOR

VOLTAGEBETWEEN
UNTIL

THE

VOLTAGE

DISTORTION
FOR

DISTORTIONUNDER

(C)

ABOVE

UNTILTHE

GENERATOR

UNTIL

THE

AND UNIT

TO

OUTPUT
TO TAPE
FOR

MAXIMUM

IF

NECESSARY

AND UNIT

TP1

FROM THE

.

AND

UNIT

LAST

SEGMENT

UNDER

THE

FM INPUTJACK

TO

6dBuV,

2

OUTPUT

OUTPUT

.

UNDER

AND

TP2

.

IS IN

THE

SIGNALAT TAPE

0

.15%

.

OPTIMUM

UNDER

TEST

OF THE SIGNAL

TEST TO

98MHZFM

(FIG.6)

1

KHZ

MODULATION

.

.

REDUCETHE SIGNAL

TEST

RANGE

(FIG

TO

98MHZ FM

10)

-50mV
2

.

(FIG

DISTORTION

TO

98MHZ

METER

TO

HAS

+50mV

10)
BEEN

FM

MODE

.

.

MODE,

.

MODE,
JUST

.

.

6.SEPARATION

A.SET

60

THE

dBuV,
B.MONITOR
C.ADJUST

ADJUSTMENT

SIGNAL

LEFT ONLY

THE

OUT OF THE RIGHT

SFR403

GENERATOR

MODULATION

FOR

MINIMUM

.

AND UNIT

.

CHANNEL

SIGNAL

.

UNDER

TAPE

TEST TO

2

.

(FIG

.98MHZ

8)

FM MODE,