Sony TR-714 Manuale utente

SERVICING GUIDE

-7

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Specifications

for

TR-714

Circuit 7

transistor

superheterodyne

Covering

range:

M.W. 535~1,605 Kc

frequency

Sensitivity

Selectivity

Output power

Current drain

Speaker

Battery

Dimensions

Weight

Color

S.W.

3.9~12

455

M.W.

pV/m

with

built-in

ferrite

bar

antenna

Better

than

µV/m

with

external

aerial

(effective

heiget

5 m.)

S.W.

µV/m

with

telescopic

antenna

Better

than

pV/m

with

external

aerial

(effective

heiget

5 m.)

Better

than

(±10

Kc off)

(non

distorted)

mA±20%

signal

2¼

dynamic

speaker

52)

Volts

BL-006 P,

Eveready

216

equivalent

116x76x33.5mm

(4½"x3·

xl¼'')

350

gr.

(12.5 ozs.)

Cream,

Dark

green

and

Dark

grey

-1-

Adjustment

Mixer

stage

Operating current

The

current

can

known

from

voltage

drop

across

which

normally

0.66~0.77

Volt.

Sinc:e R3

=2.2

KQ,

the

current

will

300~350

µA.

Tracking

M.W.

band

Adjust

core

receive

1,680

(upper

limit)

with

the

variable

condenser

set

minimum.

Then

adjust

trimmer

C,-

receive

520

(lower

limit)

with

the

variable

con-

denser

set

maximum.

ii.

Adjust

get

maximum

output

640

Kc.

iii.

Adjust

C,-,

get

maximum

output

1,400

Kc.

iv. Confirm

that

520

and

1,680

can

received

each

extreme

position

the

variable

condenser.

S.W. band

Adjust

receive

3.82

(lower

limit)

with

the

variable

condenser

set

maximum

and

adjust

C,-3

receive

12.8

(upper

limit)

with

the

variable

con-

denser

set

97°

(counting

from

maximum

position).

ii.

Adjust

get

maximum

output

3.82

Mc.

iii.

Adjust

C,-,

get

maximum

output

12.8

Mc.

Helpful informations

higher

frequency

range

the

local

oscillator

frequency

varies

when

the

antenna

circuit

adjusted.

This

variation

leads

misadjustment.

get

proper

result

the

following

process

recommended.

When

1_1

adjusted,

change

signal

generator

frequency

slowly

until

peak

output

given

the

set

under

adjustment.

Then

turn

tuning

knob

the

set

tune

the

new

signal

frequency.

Adjust

again

C,.

get

peak

output.

Repeat

this

procedure

for

times.

When

proper

adjustment

accomplished,

highest

output

will

be given.

Around

Mc,

image

frequency

may

come

into

the

adjustable

range

the

trimmer.

The

image

frequency

can

distinguished

follows.

When

the

signal

generator

frequency

changed

with

the

tuning

knob

the

set

fixed, 2

frequencies

will

received.

Among

them,

higher

frequency

gives

image.

When

the

set

mounted

the

cabinet

after

tracking

adjustment,

alignment

section

affected

grille

plate.

To avoid

this

trouble,

the

tracking

adjustment

must

performed

after

the

set

mounted

the

cabinet.

To take out

the

set

from

the

cabinet

1. Remove

back

cover

the

cabinet

and

detach

shielding

plate.

(This

shielding

plate

must

attached

without

fail

after

the

set

mounted

the

cabinet,

because

important

keep

the

set

from

body effect.)

Remove

screws

under

the

ferrite

bar

the

right

end

and

the

right

side

the

cabinet.

-2-

)

roi

antenna

(SW)

Green

MWAnt

SWO

Ciq)

_C2

MWAnt

•

ext

antenna

(

MW)

I r

r,__

I-

--1

~--__.

(''

'-"'

Battery

hoLder

J ;

~2~r~~:_

Yell

o::~lac~--

~ ·

i......::::

=k--+--O----U

ftn

•

...,

,,...

,,.-,.__

Rio

-IC-

' ·"

hite

~ t - ..-

T r

. - - •

.T .

''=--f'

C2-1

"'(

ff'

MWOSC

S.WAA

® To

Speaker

VA-VG

ANT

SA-SW

ANT

BA-MW

ANT

VO-VG

OSC

~~~~~~g

SOe,;,.

C11

[id

grownd

Mounting

diagram

TR-714

(Printed

side)

C22,....

C21

.i:,..

7 2~1

~KsR1oiF1\·-Mw

-\onthecircuit

OSC•

(}SC

Mounting

TR-714

) )

the

circuit

board

C21

the

circuit

board

circuit

b0ard

board

X,,1

Schematic

diagram

TR-714

Parts

list

for TR-714

Symbol

Description

Symbol

cription

SW.

Ant.

coil Ria lOK!J 5%

¼W

LA-034-lQ

K.!2

MW.

Ant.

coil R

820.Q

LA-035-lQ

R1s

820

SW.

Oscillator

coil

1 lOKJ'J

LO-027-AQ

s 56KJ'J

MW.

Oscillator

coil

R1•

LO-026-AQ R

680

IFT1

LI-021-AR

R2,

220

IFT2

LI-021-BR

5.6K.Q

IFT

-021-CR R

220

II II

TI-002-04 R

T2 TX-002-04 R

II II

¼"

2.2K.Q

Earphone

jack

C,-1

-2

PVC

2JT

30K!!

¼W

C,.,

Trimmer

condenser

C,.,. C

•

4.2

K!!

2pF

(

Styro

2.2

K!!

" "

05µF

220

Q " " c,

µF

100

K!!

370

(

Styrol

)

470

" C1

2000pF

(

)

820

Q "

170pF

(

)

7.5

Kfl

" "

•.

1. c•.

,®

µF

Block

K!!

" "

C10®

lOµF

Rio

4709

" "

(

Titanium

)

R11®

K!!

C1,

0.01

µF

(

MXL

)

R12

1.2

K!!

cl3

200

(

Styrol)

adjusted

when

replaced.

Volume

control

with

switch.

Electrolytic.

-5-

Symbol

Description

0.01

µF

(

MXL

)

C1sCD

(

Titanium

)

s®

10µ

C11

200

µF

(

Styro

Cis

0.02

µF

(

MXL

)

C19@

5µF

C,o

0.001

µF

(

MXL

)

C21

5µF

C,,@

30µF

3 V

0.05

µF

(

MXL

)

, 5

(

Styrol

)

C21

lOpF

(

)

0.02

µF

(

MXL

)

c,.

lOµF

10V

2T201

(2SA122)

2T76 (2SC76)

2T66 (2SD66l

2T65 (2SD65)

1T23G

1T52

Voltage

and current

distribution

for TR-714

ltage

Volt

Current

E 7,s

6.5

300

350

µA

C 0

0.31

x, B

0.41

300~350 µAs

µA

8.3

0.31

0.51

750

µA,. 5

8.3

E 0.

x, B

O.85

1.1

2•5

7.3

O.75s

x, B O.

s 1~

1.1

2_5

7.8

E 0

Xs.

0.151

650~750

µA,.,

C 9

Current

drain

signal:

mA±2O

Measurement

was

performed

with

the

negati

lead

the

voltmeter

connected

the

negative

side

the

battery.

Internal

resistance

the

voltmeter

KSJ

/V.

Small

figure

data

shows

voltmet

range.

Power

source

voltage:

Volts.

-6-

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