Nad 4300 Service Manual

NAD

-a

SERVICE

MONITOR

SERIES

4300

STEREO

TUNER

C

NAD

NOTE: A: Al: B: Bi C: Cl:

TABLE

LOCATION

SPECIFICATION

INTERNAL

SUGGESTED

FM AM

WIRiNG

P.C.B.

SCHEMATIC EXPLODED EXPLODED ELECTRICAL

4300

This

manual

U.S.A.

Canada

U.K.

Austraha

:

EUROPE

W-Germany

ALIGNMENTS

and

CONTENTS

OF

MAP

VIEW

DiAGRAM

LAYOUT

VIEW VIEW

SERVICE

versions.

all

covers

others

INSTRUMENTATiON

DIAGRAM

PARTS

LIST

MANUAL

HOOKUP

PAGE

2 3 4 5

6-9

101l 12-13 14—15

16-17

18-19

20

21-23

REAR

AM

1.

2.

AM FM

3. Output

4.

FRONT

Power.

1. Station

2.

3.

Memory Tuning

4. FM

5. IF

6.

PANEL

Antenna

Rod Antenna

Antenna

Level

PANEL

Pre-sets.

Display.

Stereo

Narrow

Terminals. Input.

Control.

3

Enter.

Indicator. Indicator.

10.

11.

7.

8.

9.

Output

5. AC

6.

7.

AC

1

AM/FM. I

F FM Mono. Tuning.

Jacks.

Convenience

Cord.

Line

Narrow.

Oft.

NR

Outlet

(not

SPECI

model).

U.K.

in

6

2

4

5

7

FM

Input

Capture AM Selectivity

Image

F.

R. I.

F. SCA Pilot THD

S/N

Frequency Stereo

AM

Usable

Selectivity.

Image

FICATIONS

Section

Tuner

sensitivity

at

ratio

rejection.

intermodulation.

rejection.

suppression

%

100

at

A-weighted,

ratio,

response,

separation

Section

Tuner

sensitivity.

rejection.

2)

(300

25,45&

38

+

(19

modulation,

65

15-

NR

(FM

65

kHz).

dBf.

15

off),

dBf.

kHz.

Mono,

dB

—30 Mono,

Stereo,

Mono,

Stereo,

Alternate

Adjacent

3OHz-l5kHz:

THD 50 50 60 60

÷ S/N:

dB dB

S/N:

dB

S/N:

dB

S/N:

channel: channel:

Mono:

Stereo:

Mono:

Stereo:

kHz:

1

N:

versions

All

sec.

50

tV

0.83

1.3V

14.5,uV tV

3.2

48

IN

<2.1

>70

dB.

76 8dB.

dB.

110

dB.

73

dB.

102

dB.

80

dB.

69

kHz

1

0.08

0.07 dB.

84

dB.

77

±

0.5

50dB. 35dB.

250

dB.

55

dB.

45

de-emphasis

dB.

% %

dB.

jI

V/meter.

at±9

except

100

0.15%

0.35%

kHz

Hz

USA.

-6

kHz

USA 75

isec.

0.8.zV

1.OpV l3pV

1

iV

2.5

42

iN

<2.1

>70

dB.

76

dB.

8

110

dB.

73

102 80dB.

dB.

72

1kHz

0.07%

0.05 dB.

85

dB.

78

±

0.5 dB.

50

dB.

35

250 60dB.

dB.

45

version

dB.

rIB.

dB.

%

dB.

jI

V/meter.

at

only.

lOOHz-6kHz

0.15% %

0.35

±

kHz

10

0

C

()

NAD

;

1

Senes

Monrior

r

LL°_-----

2

Stereo

I

Tuner

4300

Eruese

Specifications

weight

requirements

(width

x

height

x

depth)

43.5

17.1

4.55

5.75

50/60 24W.

29.3

x

8.7

x x3.4x11.51n.

Kg./lOIb.

lb.

Kg.112

Hzat110,

10

cm.

oz.

120,

220

VAC.

240

or

ILJ.

Physical

tuNiNG

III

OMSTENE’.)

IFNA000W

FM

NARFOW

OFF

.o

Dimensions

Net Shipping Power

()

1

3

4

6

5

78

910

11

3

INTERNAL

VIEW

4

SUGGESTED

INSTRUMENTATION

OSCILLOSCOPE

I

USE

ONL’?IFFM

GENERATOR

WITH

FM

BUILT-IN

HOOKUP

GENERATOR

SWEEP

UNAvAILABLE

WITH

lE: ST

AUDIO

BUILT-IN

1000A

OSC

SWEEP

1

I

ó

0

o

0

FM

ALIGNMENT

NECESSARY

•

FM

•

Stereo

•

Audio

ST

iO2OA)

•

AC

VTVM’s

•

THD

•

Oscilloscope

•

Frequncy

•

VOM

•

75

ohm

IMPORTANT

Before

1) IF

FM

2) multiplex

INSTRUMENTATION

Generator

Modulator

Generator

(or

Analyzer

Counter

or

DMM

Dummy

alignments

Generator

decoder

(less

than

(less

(not

one

(resolution

or

(5mV

(high

Antenna

is

not

circuits.

0.05%

than

;0.05%

necessay

LeftRight

with

a

less

better

sensitivity,

impedance,

commence,

synthesizer-type,

THD.)

THD.,

ifFMGenerator

switch)

than

0.1%) X

must

read

release

IF

be

more than

has

input

capability)

in

mV)

NARROW

sure

to check

50dB

built-in

and

its

Sep.)

sweep,

MONO

frequency

e.g.,

switches

with

SOUND

(out),

FREQ

TECHNOLOGY

Switch

counter

FM

NR

when adjusting

ST 1000A

off

(in).

and

detector

and

FROM TUNER

TOPINI

FRONTEND

AT

SCHEMATIC

Cl 330p

C>’

PICTORIAL

Cl

02

DIAGRAM

02

DIAGRAM

Ri

OF

CENTER

jjEEEE

DETECTOR

OF

OUT TO

DETECTOR

LEAD

SCOPE

scoc

DISTORTION

I\1

PROBE

should

Diodes germanium; available

PROBE

leads

Keep

minimize

stray

types

as

Some

shortas

signal

METER

DISTORTION

OUTPUT

point-contact

be

commonly

are:

0A80

1

0A8 AA1

19

1N60

N34

1 1N22

possible, pickup.

00

A.

SYNTHESIZER

1.

Connect Tune to

2.

3.

Adjust

B.

FRONT-END

Alignment

TUNING

a)

It

is

essential

1.

Connect Tune

2.

FREQUENCY

Frequency

98MHz

C-201

so

TOLERANCE:

ALIGNMENTS

of

the

VOLTAGE

to

check

DMM

to

88MHz,

TOLERANCE:

Counter between

RE

(No

the

that

108.700MHz

front-end

tuning

between

adjust

and

+/—0.5V.

3.6V

input

local

should

voltage

TP-105

L-6

TP-104

needed).

oscillator

+/—2KHz

onlybenecessary

and if

frequency

before

aligning

ground.

the voltage

and

is

incorrect.

ground.

shown

after

rest

the

by

repair

of

frequency

the

to

the

front-end.

front-end

counter

or

reads

crystal

108.700MHz.

oscillator

circuits.

•o

3.

Tune

to

108MHz

SPECIFICATION:

TRACKING

b)

1.

Connect IC

2.

3.

4.

5.

6.

Set Adjust

entire Set Adjust Repeat

4.

to

FM

Generator

102

with

ground

tunerto106MHz,

C-2,

C-9,

curve

on

tuner

to

90MHz,

L-1, L-2,

above

00

and

C-li

display.

L-3

steps

confirm

21-25V.

(150KHz

to

the entor and

enter

and

3,4and

2,

that

tunershield.

into

C-14

into

L-4

for

the

voltageiswithin

sweep,

Preset

for

maximum

Preset

1,

maximum

Preset

5

(use

8,

and

100V

and

curve

tune

curve

tune

1

output)

the

height.

and

the

8)

the

following

to

75ohm

generator

heightonthe

generator

till

both

frequencies

specification.

antenna

so

that

oscilloscope

so

that

curve

input

are

and

appears

while

appears

maximum

at

Detector Probe

on

Oscilloscope.

reducing

on

the

oscilloscope.

curve

RF

height.

to

input

to

1

keep

of

0

5

()

6

IF

C.

1.

2.

DETECTOR

D.

1.

2.

3.

4.

5.

6.

SIGNAL

E.

1.

ADJUSTMENT

to

tuner

Set display

Adjust input

Disconnect

Distortion Connect Tune Adjust

SPECIFICATION:

Adjust

TOLERANCE:

Repeat

Tune

curve

a

L-5

and

possible.

as

ALIGNMENT

Analyzer.

DMM

98MHz

to

L-102

above

METER

to

98MHz

on

L-101

Detector

across

and

Secondary

Primary

+1—

steps

LEVEL

and

for

maximum

TP-101

1

for

than

OV

5

till

&

5V

(the

from

mV

lowest

reading

approx.

Oscilloscope.

Probe

feed

less

for

5OmV.

4

feed

(—)

from

0.12%

further

no

from

tuner

and

THD.

and

TP-102

FM

(in

on

FM

be

must

and Oscilloscope,

tuned

symmetrical

(+).

Generator

MONO).

DMM.

improvements.

Generator

(Modulate

to

output

75ohm

an

unoccupied

curve

and

1

antenna

connect

KHz

on

100%)

input.

frequency),

the

oscilloscope

tuner

75ohm

to

output

and

display,

to

antenna

tune

the

input.

FM

Generator

using

oscilloscope

Check

6.

to

as

little

and

oc

CC)

00

H.

7.

8.

FM

Confirm

1.

2.

3.

4.

5.

and

confirm

SPECIFICATION:

Switch Right

If right

Check

Tune measurement.

With

Adjust

Switch Switch Switch

IF

NARROW

(or

Left)

leak

the

SPECIFICATION:

NR

outputs

channels.

separation under

CIRCUIT

that

FM

98MHz

to

reference

attenuator

the

NR

FM FM

NR NR

FM

channel

button

NR

and

set,

on, off, on,

that

more

button

on

more

cancell

and and

and

separation

than

VTVM

opposite

narrow

than

isatOFF

feed

of

FM adjust adjust confirm

50dB.

(in),

and

channels

40dB.

1

mV

the

stereo

Generator

R-148 attenuator

that

under

and

modulate

oscilloscope.

are

IF

bandwidth

position

with

100%

modulation and

so that

so

S/N

wide

different,

(in),

that

S/N

of

FM

is

improved

IF

bandwidth

Left

and

at

modulation

S/N

Right)

(or

readjust

confirm

first.

leave

reads

ratio

is

improved

Generatorsothat

approx.

by

within

is

channel

R-403

itiswithin

into

75ohm

pilot

50dB.

by

tone

8dB.

S/N

2dB.

so

following

the

only.

that

following

the

antenna

only.

ratio

Adjust

readings

input

reads

specification.

for

R-403

become

specification.

and

60dB.

minimum

same

set

reference

on

output

both

in

left

for

and

S/N

F.

G.

Adjust

2.

STEREO

1.

2.

STEREO

1.

2.

3.

4.

5.

SWITCHING Modulate Increase

watched

as

TOLERANCE:

that,

Note

Tune

to

Modulate channel

Check

SPECIFICATION:

Next,

switch

SPECIFICATION:

Reset

channel

Right

modulate

Next,

the

leak

If

R-127

FM

DISTORTION

98MHz

becomes

distortionatstereo

IF

bandwidthtowide

that

so

THRESHOLD

FM

Generator1KHz

Generator

on

VTVM’s

+3V.

turning

when

and

Left

outputs

Right)

(or

minimum.

IF

NARROW

VTVM

Right

on

the

AND

feed

less less less less

less less less

and

channel

opposite

second

level

and

input

channel

than than than than

than than than

LED

100%

upwards

Oscilloscope,

level

SEPARATION

from

1

mV

only,

operation

0.12%,

0.08%,

button

(in)

0.8%, 8%

0

0.8%,

position

oscilloscope.

only

channels

of

signal

only,

Left

0

from

switches

the

down,

(WIDE/NARROW

Generator

FM

and

adjust

wide

under

L+R.

stereo

L

stereo

R

stereo

L—R.

stereo

check

and

only.

L

stereo

only

R

stereo

L-R.

stereo

and

again

adjust

and

different,

are

strength

pIus

and

unit

IF

only.

distortion

modulate

R-141

indicatorisjust

19KHz

R-126

adjust

to

one

switch

will

IF

75ohm

to

and

L-5

band-width.

Left

minimum

for

readjust

pilot

8-10%.

that

so

into

antenna

channel

R-141

only

mono

slightly,

stereo

output

that

so

channel

BANDWIDTH)

L-101

under

lit

stereo at

input.

signal

only.

on

up.

5V

at

a

lower

so

that

input.

Adjust

Left

readings

light

input

the

channel

become

turns

level.

level,

distortion

R-141

on

and

typically

for

minimum

VTVM

same

audio

3.5pV.

on

Left

and

oscilloscope.

in

both

outputs,

Right)

(or

output

channels.

on

O

0)

C.

0

7

8