JVC R-X40L, R-X40 Service Manual

I

l-

JVE

No.

FEB.

2603

1982

Gontents

1.

Specifications

2. Names of Controls

and Their

3.MainPartsLocations...

4. Removal

4-(1

4-(21 Connection

Procedures

Removal

I

Procedures of Bottom

Diagram

5.AdjustmentProcedures

5-(11 FM/AM

Adjustment

Power Amplifire ldling

5-{2)

Adjustment

Block Diagram

6.

Exploded

7,

Printed

8.

8-(1) TFC-37n

&

1.

Specifications

(MW/LWl

Procedures

Procedure

Views and Part Numbers

Board Ass'y

Circuit

FM/AM

Phono Equalizer

Functions

Tuner

Current

Parts List . . . . . .

and

Tuner

P.C.

Board

......

Cover

.......

Ass'y .

Page

10

11

Page

1

2

4

5 5 5 6

8-(2)

TXX-402I

P.C.BoardAss'y.

8-(3) TDC-61! Logic, Gounter,

&lndicatorP.C.BoardAss'y .....

8-(41

TAC-532A SEA

P.C.BoardAss'y.

8-(51

TAC-533!

P.C.BoardAss'y.

6

8 9

8-(61 TPS-333!

AC Outlet

&

9. R-X40/R-X40LSchematicDiagram .....

Packing Materials and Part Numbers . . . . .

10.

ll.AccessoriesList

Parts

12.

Designated Areas .

List

with

Power

Control

Volume

Fuse, Power

P.C.

Specified

Amplifire

Switch

& Switch

Supply

Board Ass'y .

Numbers

for

.......15

.......20

...21

. . . .

.......26

Back Cover

18

22 23 26

FM Tuner

Tuning Range

Usable Sensitivity

50 dB Ouieting Sensitivity

Section

(Figures

(lHF)

Mono Stereo

Distortion

Mono Stereo

to Noise Ratio

Signal

Mono

Stereo

Selectivity Capture

Ratio

lF Rejection

lmage Rejection

Separation

Stereo

(MW)

AM

Tuning Range

Usable Sensitivity

Signal

Selectivity

LW Tuner Section

Tuning Range

Usable

Signal

Selectivity

Tuner

to Noise Ratio

Sensitivity

to Noise Ratio

(at

Section

based upon

are

:

MHz

87.5

: 10.3 dBf :

dBf

14.8

:

dBf

38.3

:

0.15 %

:

0.2 %

98

80

73

65

80 56 45 dB at

(1

MHz, 80.dBf)

(lHF

dB

(72

dB, DIN)

(lHF

dB

(63

dB, DIN)

1400

dB,

(55

dB,300kHz.

1.5 dB

dB at

dB at 98

1710

520

-

(for

10 kHz step)

(522

50

25O

50

(45

40

(36

1

70

45 dB at 245

40 dB

-

(External

pV

pY

dB

at

with LW)

dB

110

dB

kHz - 360

53

pV

at

tg

161 1

lmat

t9

108.0 MHz

-

(1.8

pVl300

(3

pVl300

(45

pvl300

kHz)

A-network A-network

kHz

98 MHz

MHz

1 kHz

kHz

1000 kHz

mV/m

100

kHz

kHz, DIN)

kHz

245

kHz

at

IHF

fr)

O)

A)

weighted)

DIN)

for

9 kHz

Antenna)

kHz

245 kHz

Standard)

step)

(999

kHz)

nput

I

Sensitility/l

Phono

Play

Tape

SEA Control

Frequency

Center

mpedance

Control Range

to Noise Ratio

Signal

(lHF

short-ciruited

A-network)

*U.S.A.

(Note)

Design and

Power

Specifications

U.S.A.

Europe

Australia & U.K.

Areas

Other

Dimensions and Weight

& CANADA

specifications subject

Areas

Canada

&

(42)

50

RMS, both channels

8

watts

ohms at 1 kHz with

than 0.7 %

monic distortion

2.5 mV/47 kQ

180 mVi50 kO

(180

mV/50 kO. DIN)

Hz, 250

63

16 kHz

t12

dB

Phono

71 dB

(rHF

A-202

Play

Tape

(tHF

A-2O274 dBl

to change

Voltage

Line

Frequency

&

120

AC

AC AC 240 V

AC1101120t220t

24O

V,60

220 V

N

V

50 Hz

^,

,r,

50 Hz

Selectable,

50/60 Hz

per

channel,

driven, into

no more

(0.003

%)

total

Hz,l kHz, 4 kHz,

78

dB)

dB

91

without notice.

Power

Consumption

Hz

210W 270VA

400 w 400

w

400 w

min.

har-

\/

Amplifier Section

R.X4OL

/

Power

Output

Harmonic Distortion

R.X4O

No.2603

and Total

40 watts

both channels

from 20 more than

monic distortion

per

channel,

Hz to 2O kHz,

total 0.008

driven,

min. RMS,

into

ohms

8

with

o/o

no

har-

-1-

Model Height

R-X4O

R.X4OL

117

(4-19132"1

mm

width Depth Weight

6.6 ks

(14.51bs)

7.3

(16.01bs)

435

mm

.17-1/8"1

mm

366

(14-318"1

375 mm

(14-314"1

v

ks

\,

2.

Names

Gontrols

of

and

Their

Functions

(D

@

\,

JVg

Rxa

iT

'l

I t.:

rI

POWER

O

ON:

"Super Durinq is turned on, no

"click"

defect in

operates

on.

ti

STAND BY:

outlet, the memory circuit

stations preset

failure

period

days.

Headphone

@

Plug

and

sound

switches

spenreRs-l

€)

Press

SYSTEM

SPEAKERS-2

o

Press

SYSTEM

S.E.A.

O

These f

lower f

For

operation of

control

ble

controls, The

pleasure

switch

Press

to turn

A" lights

f

the

irst 3

of the relay operation.

the

mute

to

not

are

data

are

or when

of non-applied

stereo headphones into recording

from

the

(}

O

to switch

1

terminals

to

switch the speakers connected

2 terminals on or off .

Graphic Equalizer

ive controls

portions

ive

over

with different

I

power

the

and the

or 4

seconds after the

will

sound

unit. The

When

subject maintained

iack

monitoring.

headphones

to

the

preset pdtterns

built-in

tlre switching noise

power

the

to cancellation

power

the

power

(PHONES)

their

OFF

switch

speakers

on or off.

switch

allow

of the

these controls,

than the conventional

tone

types

:\\r,{\'/rR srrRr.

ln'i,{

on. The

heard until

be

panel

display

This

power protection

for

plugged

cord is

is operating and

even

in

the

is disconnected,

cord

does

this

only,

positions.

connected

system

you

f

requency

of

exceed

not

jack

for

you

want

lf

press

individually boost

to

spectrum

give

which

to

add

music.

*r'

\rx

power

indicator

is illuminated.

POWER

not due

is

speaker

or

alteration.

case of a

you

into

hear

the

switch

to

circuit

protec-

an

preset

The

power

if the

a couple of

private

to the SPEAKER

listening

listen

to

the SPEAKERS

by 12

far

more f lexi-

bass/treble

your

listening

the

any

AC

dB.

gnLaNcE

@

Use

to adjust the

speakers.

the left channel; when

hear only

sen REC

O

Press

to

Graphic Equalizer.

LOUDNESS

O

At

low volumes,

This is not

ear's different

to the

Press

to compensate

mes.

volu

VOLUME

O

Slide

to the

(E

rnPe MoNlToR

Press

to listen to

to

or

terminals. The TAPE MONITOR

the switch

select

switches.

VIDEo/AUX

O

Press

to

VIDEO/AUX

(D

PHONO

Press

to

PHONO

the

(D

FM

switch

Press

to

(E

AU switch

MW

Press

to switch

(D

LW

switch

Press

to switch

control

balance between

When

slid all the way left,

the right channel.

switch

record

tapes

SWitCh

the tone

due

to any

for

control

right

to increase the sound

the tape

hear

to

switch

hear

sound

terminals on

switch

hear or record

terminals on the

switch on

switch

the

(for

R-X40)

(for

R-X40L)

on

the

(R-X40L

on

the

you

slid all the

with

the

of

change in the sound itself,

sensitivity

when

this

switch

deck connected

the source selected

from

the

from

sound

FM

tuner section.

(MW)

AM

only)

LW

tuner section.

way right.

effect of

added

appears

sound

to

you

indicator lights. Release

at low

are listening

level.

with

source connected to

panel.

rear

the turntable connected

panel.

rear

tuner section.

left and

right

will hear only

you

will

the S.E.A.

change.

to

due

but

volumes.

at low

TAPE

to the

the source

the

R-X4O

No.2603

R.X4OL

/

-2-

(D

MODE/SCAN

This

switch is used

mode and

are related

tions

possible,

tuning. MANU/MONO

left

from

(E

Auto

Up-scanning button

beeps

the direction of increasing frequencies.

search the

Tuning) station digitally When

not

detected. Press

Down-scanning

ning.

Down-scanning

tion

the

those of

set this switch

When

right channel

and

both speakers.

rurutruc

tuning

will

stops automatically when

is

by the

you

even

stop

of

decreasing

lower f requency

the Up-scanning button.

Note: Scanning starts when the

ed

switch.

Manual

switch

tuned-in

reception

or

U.K.

button

ing

scanning

tuning

@

frequency

kHz

10

Australia), or 1 kHz

and

changes the

(more

sequence

lf one of these

AM or

be different.

(D

Press

show

FM

MEMORY

this switch and

that this

switch

to select both

AUTO/MANUAL

each

to

signals

(^)

buttohs

be heard and

upper

pulled

in.

f

requency

continue to

if

broadcasts

the Up-scanning

button

is

and

stopped by

possible

is

Pressing

.

(50

kHz

for

steps

than

0.5 sec.) changes which

buttons

source select button, the tone

switch

unit

other.

AUTo/sTEREo

to

are

too

for

manual

FM

signals

(

>

When

):

tuned-in

the

frequency

This

tuned:in

indicator.

press

select stations

to

(

1

frequencies.

station.

):

by

Up-Down-scanning

the

changes in 100kHz

for

steps

(MW) (9

AM

tuner step

stop

pressed

is

memory indicator

the

ready

is

FM

scanning

When

weak to be

tuning;

are mixed and

this

broadcast.

the

frequency is displayed

this button,

which

could

button

Press

Use

this

Functions

<

or

pressing

Europe,

kHz

for LW.

steps

by step,

tuning

when released.

immediately after the

receive a memory setting.

to

STEREO/MONO

mode. These

stereo

(r)

received,

in

this

button

frequency changes

Use this button to

Scanning

be tuned

and then

by

to tune

func-

reception

for

set to

mode the

heard

pressed,

is

(Auto

(or

FM

in are

press

down-scan-

in

direc-

the

auto

AM)

does

button to search

identical

are

> button

MODE/SCAN

th'e

MODE/SCAN

the

buttons, thti

steps

U.K., and

steps

Tapping

continuous

in

a

of

the

with

press-

is

for

Australia)

for Europe,

press-

high

speed

beep

will light

the

FM

this

will

(This

switch is a

button while sec.) makes it

is

in

received.

memory

(D

When

indicator lights

the

automatically in

select button.

@

These

or

When and the LED

function

MEMORY indicator

the

preset

Station select

buttons are used to select

memorize

to

one of

to indicate

lf

one of

switch

received

buttons can be used in common

one

lf

other mode including

tion,

select buttons

lf

AM or

be different.

O

This

in.

@

The

(kHz)

(D

will be "Memorized". One

AM

station

you

change the

the station

one of these

FM

STEREo indicator

indicator

Frequency

tuned-in

are

(MHz) (for

four

or

ed

@

This is

broadcasts. The the

@

These

(D

to

This

pressed

digits

for FM

stcrual

used in

stronger the

ourpur LEVEL indicator

LEDs

TAPE

indicator

for

non-lock

MEMORY indicator is lit

the

possible

When

MEMORY

MEMORY indicator

the

does not operate.

switch

to show that

station

to memory.

about 10 sec. or by

buttons/Station

the station

these buttons

indicator

which channel is these buttons

is

(one

remains

source select

lights when an

indicator

frequency

displayed for AM

Europe,

(MHz) (for

reception.

STRENGTH

on

pressed

MW or LW

mode

power-off

previously

tuned

buttons

is displayed digitally.

U.K.,

tuning to

greater

signal being

indicate the output level.

MONITOR indicator

lights

monitoring or

the

when

type.)

Pressing

station select

the

(for

about

to memorize the station being

is not lit,

pressed,

is

unit is

the

This

indicators

one of

for

an individual

pressed,

is

the corresponding

in

operation.

pressed

is

in, the station

for

station

this

ready

indicator

pressing

the

beeps

when

the

which is

of

the station select

FM

one

for R-X40L).

from radio reception

and back to

selected

in.

pressed

is button, the tone

FM

reception

Australia

U.S.A., and Canada)

indicator

both

number of

received.

the TAPE MONITOR

listening

with

immediately

of

stereo broadcast

and five

other countries)

and

FM

to the

and

tape

AM

LEDs

will

the station

preset

will be

button lights

station and

radio recep-

the station

the

Four

are

recordings.

the

MEMORY

register

to

go

out

stations

channel.

heard

MEMORY

being

to any

after the

beepwill

is

tuned

digits digits

display-

(MW/LW)

light,

that

switch

10

\z

v

is

R-X4O

No.2603

R-X4OL

/

v

Main Parts Locations

3.

3-(11 Top View

\-

\,

Fuse & Power

P.C.

Board

TPS-333-1

Power

P.C.

TXXAO2-1

SEA

P.C.

TAC-532

Ass'y

Amp.

Board

Control

Board

Supply

Ass'y

3-l2l Front View

Slide

E69231-001

lrlrt

Knob Headphone Cap.

E69466-O01

Volume

Knob

E69313{01

Push Knob

E69314-O01

FM/AM

P.C.

Board

TFC.37.1

CE. Buzzer ENZ001-001

Logic

&

P.C.

Board

TDC-61-1

Tuner

Ass'y

Counter

Ass'y

\-

fy

3-(31

Rear

AM

See

Power

Knob

E69405001

View

Channel back cover

(ltem

Antenna

See back

-t

i--t

t--t-

(ltem

Space

1ol

I

Terminal

cover

11)

Push

Knob

E68583-001

Switch

Balance Knob

E69406.o01

Bar Antenna

See

back

(ltem

Jack Ass'y

EMN00TV402A

cover

1l

DIN

See

-4-

back cover

(ltem

Top

Cover

See

back

(ltem

I I

Jwdmift-ffi-^rm

trlS rd

l@l

Socket

g)

Knob

Push

E68583.o01

cover

12)

(-

siil

J

Power

See

Cord

back

(ltem

Speaker Terminal

E03572007EM

rutm

il$tm{,s v0[IrG€ ilsts

nrGrrs

cover

4)

R.X4O / R-X4OL

No.2603

4. Removal

Procedures

4-11) Removal Procedures

(1

Step

)

r.5)

Fig.4

Step

(1)

Remove screws

(2)

Remove screws

(3)

Remove the chassis base

@ @

-

the

on

@

on the chassis base.

@

in

manner shown

this

of

P.C.

Bottom

board.

in

Gover

Fig.

Step

(2)

":"

1

iO

I'

\

fl,r..

..

ol

t.';

\r

\r/

f!fffftftfffrfffil i

llllll

llil ll il il il:,

t.

l0)--c-1

j

I

jir

'

rD

Step

131

6.

l. t-fr--l

D-

oi

.l

'l

I

'1

"l

1

rs)

\z

4-l2l Connection Diagram

\r.

Fis.6

v

C

I

\-

-

_ _-\

I

\r'

R.X4O

No.2603

R-X4OL

/

-5-

5.

Adiustment

Procedures

\-

5-(1) FM/AM

(MW/LW)

o

Tr ro

Tuner Adjustment

Ltot

rf

\--l

cto2

@

r:\

Lr02

Tlot

Procedures

High Frequency

the RF

6. Set 1

kHz

ot 2

Set

1tY.

the

7.

8. Adjust the FM trimmers

9. Repeat these high and low

alternately

Descriminator,

Press

1.

to

2. Connect

75 kHz deviation to the

panel

through

3. Connect an oscilloscope, Distortion Meter

to the Rec.

4.

the

Set

minimize.

5.

the Frequency

Set

6. Connect a DC VTVM between TP1 1 1 and 1 12.

7.

Adjust the core indicated arrow A of T101

VTVM reading And set the RF

8.

9. Adjust

distortion is minimized.

generator

and a deviation of 75 kHz to

Frequency

to 106 MHz,

Display to 106 MHz.

to

C102

maximize the output.

frequencies

a

provide

until maximum sensitivity is obtained.

Distortion and

position.

FM

RF

an

a dummy antenna.

jacks

out

generator

RF

of 0

generator

the

core

indicated

generator,

Signal Gain

antenna

on the

to 98 MHz,

Display

(zero)

output to 1 mV.

1 kHz

rear

to

mV.

arrow B of T101 so thatthe

modulation

terminals

panel.

generator

a 98 MHz.

modulation

input

an

adjustment

and a

on the rear

and VTVM

output to

for

DC

of

\,

\-

sw305 sw507 sw306

sw302 sw304 sw305

Fig.8

FM Section

Band Cover

1.

the frequency

Set

display

2. Connect a DC. VTVM.

3. Adjust Ll03 so

4.

5. Check

set the frequency display

And

the

that the VTVM.

VTVM.

Note: After adjustment,

follows:

as

FM:

Sensitivity

Frequency

Low

1.

Connect an

the rear

2.

Set an

and a deviation of 75 kHz to

panel

RF

(for

Low-end 87.5

Hish-end 108.0 MHz

generator

RF

through a

generator

to 108.0 MHz.

points

to test

shows

to

87.5

voltage

reading

confirm

West Germany only)

MHz

that the band

-

300

+500

to the antenna terminals

dummy antenna.

to 90 MHz, a

provide

3. Connect a VTVM and an oscilloscope

jacks

on the rear

4.

Set

frequency

the

5. Adjust coils L101

panel.

display

L1O2

,

to

MHz.

90

to maximize the output.

117

and GND.

8.00V.

MHz.

t

V

kHz

input of 2

an

0.5 V. cover

on

1tY.

1.60

modulation of 1 kHz

to the Rec. out

Multiplex Multiplex

1.

2.

3. Connect a VTVM,

4.

5.

6.

7.

8.

is

Stereo Separation

9.

10.

1 1.

12.

13.

Stereo

14.

and

Stereo Separation

Set the stereo signal

modulation frequency,

kHz main

67.5 the RF Connect an RF

through

meter to

Set

Connect

TP1 08.

Switch

Adjust

Switch the selector of stereo modulator to left

modulation.

generator.

the RF

the frequency display to

off the

R181 so that the

19 kHz

(0

and sub carriers. Connect its

a dummy

the Rec. out

generator

the frequency

pilot

-50

-

Adjust R173 so that the output of

minimized.

Switch

modulation.

Adjust R173 so

Set R173

right is

the selector of

different.

threshold

that the left channel is minimized.

to

a average,

Adjust R143 so that

output

of RF

generator

7.5 kHz deviation

generator

antenna.

an oscilloscope

jacks

to

98

counter to 19 kHz Test

signal of

frequency

Hz).

the modulator

if the separation of left

STEREO

10

follows:

as

to the antenna terminals

and a distortion

on the rear

MHz 98

stereo modulator.

pV.

panel.

and outputof 1

MHz.

counter

right

to right

indicator

lights

channel

400 Hz

pilot,

output to

mV.

Point

indicates

channel

and

the

at

is

R.X4O / R-X4OL

No.2603

AM(MWI

Band Cover

1.

2.

Section

Press

to AM(MW)

frequency

the

Set step), or 522kHz

positign.

display to 520 kHz

(9

kHz channel stepl.

3. Connect DC. VTVM. to test

4.

Adjust L203 so that

5. And set the

ctannel step), or

6. Adiust G246 so

1710

kHz, or 7.50 V

the VWM.

frequency

1611 kHz

that the DC. VTVM.

for 1611

point

shorvs 0.85

display to

(9

kHz channel step).

kHz.

(10

117

and

1710 kHz

reads 9.00 V

kHz channel

GND.

V.

(10

kHz

for

LW Seetion

Band GoYer

to LW

frequency

position.

display

the

so that

display to 360 kHz.

to 153 kHz.

points

116 and GND.

VTVM. shows 1.20

Press

1.

2.

the frequency

Set

3. Connect a DC. VTVM. to test

4.

Adjust L2(X

5.

the

Set

6. Adjust C251 so that the VTVM. reads 8.00 V.

V.

Tracking and

1.

Connect the rear

2. Set

modulation

3.

Set

4.

Adiust

Semitivity

the RF

panel.

generator

the

frequency

the

the core of

400 Hz.

at

generator

to

display to

ferrite

output.

generator

the

5.

Set

the frequency

Set

6.

14fl)

to

display of the

or 14O4 kHz.

7.

Adjust

Repeat

8.

maximum sensitivity is obtained.

so that the

C202

these adjustments

to the antenna

600

kHz

bar antenna

kHz,

output

(or

600

kHz)

603

kHz, or 603

to maximize the

or 14O4 kHz.

unit to 1400 kHz,

is

(1

signal

-

maximized.

7) alternatery untill

terminal

with

30 %

kHz-

on

Tracking

and

Sensitivity

1. Connect the RF

the rear

2.

Set

at 4(X) Hz.

3.

Set

4.

Adiust

the output.

5.

Set

6.

Set

7.

Adiust C209

Repeat these

8.

maximum

panel.

generator

the

frequency

the

frequency

the

frequency

the

selectivity is obtained.

generator

to the antenna terminal on

to 164 kHz with

display to 104 kHz.

core of

so

ferrite

generator display

bar antenna to maximize

to

of the unit to 353 kHz.

that the output signal

adjustments

(1

30

kHz.

353

is

alternatery untill

-7)

% modulation

maximized.

R-X40 / R-X40L No.26O3

-7-

5-(21

Power

Amplifire

VTUM

DC.

ldling Cunent

f-"4-

Aiustment

Procedures

v

t-

1 \-,

I

J

I

)

,

/l

,1

TXX402-1

Power Amp.

Precaution

1. Turn R733 and R734

power

the

2. Allow

3.

4.

the set warm up at

adjustment.

Must keep the

adjustment.

the volume control

Set

adjustment.

P.C. Board

switch on.

heatsink to

@u-

Ass'Y

fully counterclockwise before

least 5 minutes before

prevent

to minimum during this

overheating

before

Fig.9

R734

@

Adjustment

5.

Connect a DC.

channel, or to R752's leads for right

6. Adiust R733 for left

channel,

VTVM. to R751 resistor's leads for left

so that the DC. VTVM. reads

channel.

channel, or R734 for right

5 mV.

lv

-8-