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TR-8460

SPECIFICATIONS

Circuit

System:

11-transistor

1-diode

superheterodyne

Frequency

Coverage:

108

—

136

MHz

(2.78

—

2.20

m)

Intermediate

Frequency:

10.7

MHz

Antenna

System:

Built-in

telescopic

antenna

Sensitivity

at

50

mW

output:

1

MV

(0

dB)

at

S/N

6

cB

Selectivity

at

+200

kHz

off-resonance:

50dB

at

122

MHz

at

—200

kHz

off-resonance:

55

dB

at

122

MHz

Power

Output

at

10%

distortion:

670

mW

maximum:

900

mw

Current

Drain

at

zero

signal:

26

mA

at

10%

distortion:

240

mA

Power

Requirement:

Four

“’D"

size

flashlight

batteries

6V

or

house

current

by

using

ac

adaptor

AC-601W

Speaker:

9.2

cm

(3

3/4")

dia.

8

Q

Dimensions:

268

mm

(W)

x

140

mm

(H)

x

53

mm

(D)

(10

Y2"x

5

7/2"

x2

16")

Weight:

1.3

kg

(2

Ib

14

02)

with

batteries

SON

Ye

SERVICE

MANUAL

Section

Title

Page

Specifications:

.

2.

...-2

4.4

So.

ee

es

]

42

OUTLINE?

fs

%t

ce

ek

SA

a

ee

EG

3

1-1.

External

View...

...-.-..2-.4-

3

1-2.

Internal

View

.....-...-.2-8.

3

1-3.

Block

Diagram.

.....

2-7-2...

3

2.

DISASSEMBLY

.............-.-.

4

2-1.

Rear

Cabinet

Removal.

.........

4

2-2.

Circuit

Board

Removal.

.........

4

2-3.

Cursor

Removal

........-...-.--.

4

2-4.

Dial

Cord

Stringing

...........

4

3.

CIRCUIT

ADJUSTMENTS

.........

6

3-1.

l-f

Alignment

.........-..2.--4-.

6

3-2.

Frequency

Coverage

and

Tracking

Adjustment...

........2--

6

4.

MOUNTING

AND

SCHEMATIC

DIAGRAM

............-...5.

7

4-1.

Mounting

Diagram

-

Component

Side

~.

7

4-2.

Mounting

Diagram

—

Conductor

Side

—

-

8

4-3.

Schematic

Diagram

....-...

17.

9

5.

EXPLODED

VIEW

AND

PACKING

.

..

.

10

5-1.

Exploded

View

(1)

2...

.....-..

10

5-2.

Exploded

View

(2).

2...

02-0

-

iat

SS.

PACKINGS

(s,:8

vive.

ar

Be

hae

Ge

a

12

6.

ELECTRICAL

PARTS

LiST

........

13

TABLE

OF

CONTENTS

Hardware

Nomenclature

Pan

Head

Screw

...

-

Flat

Countersunk

Head

Screw

Binding

Head

Screw

Oval

Countersunk

Head

Screw

Truss

Head

Screw

. .

Round

Head

Screw

Type

of

Slot

@

P3x

10

(2

=

(

—

Example

——-

(=

=

(=

settee

(=)

s_]

Type

of

Head

E

—

Retaining

Ring

(E

Washer)

Ee

Length

in

mm

(L)

Flat

Fillister

Head

Screw

.....

SB

am)

Diameter

in

mm

(D)

ie

Set

Screw

........

~

Nut

f

L

ai

a

Tae

al

oO

W

—

Washer

Spring

Washer

Lock

Washer

L

Tl

—

When

ordering

replacement

parts,

you

should

use

PART

NUMBER

listed

on

the

Parts

Lists

or

shown

in

the

EXPLODED

VIEW.

The

reference

number

should

not

be

used

for

ordering

purposes.

Ss

SECTION

1

OUTLINE

a

2

4.4

EXTERNAI

JiEW

coe.

EAD

RNAL

VERY

X-38405-85-7

knob

ass'Y,

VOIUING

and

squelch

control

re

eee

717-501-072

X-38405-84-1

Sena

eemcem

ernie

carrying

handle

assy

—

SQUELCt

Q&

Q

i

|

,

|

|

;

|

J

of

if

F

Veo?

|

p

|

Ss

Al.

ES

O

POWER

AM

d

REC

OUT

(Yas

|

Q10

I

}

0

é

AF

AMP

eds

L

>AV

||

Exr

power

en

|

(la

ag

fo

|

ATT

aH

pp,

y¥

be]

|

a

ee

a

POWER

AMP

|

4

|

ey

fe

thr

eee

|

antenna,

telescopic

SECTION

2

DISASSEMBLY

2-1.

REAR

CABINET

REMOVAL

2-3.

CURSOR

REMOVAL

-

:

4

Nt

mai

+

2.

2.

Loosen

the

screw

marked

D)

in

Fig.

2-2

and

e

remove

the

dial

cord

from

the

dial

cord

retainer.

;

3

eB

ve

two

-~

screw,

tapping

3.

Remove

the

two

OD

@P3x

12

and

remove

the

dial

scale

a

oo

4.

Remove

the

cursor.

dial

scale

haiding

case

DIAL

CORD

STRINGI

smove

the

circuit

y

Rp

|

ee

q

2.

Prepare

the

Sc

on

Fig.

2-4

|

:

—

eapacitor

@)

screw,

tapping

XC)

screw,

tap

leg

“

@P26x8

“

@OP32x6

Fig.

2-2

pe

|

3-828-820

19

”

spring,

dial

cord

1

eee

777

mm

(30

7/32

j

ee

aceeSES|

ri

acca

aaa

7-633-

120-52

7-623-609

dial

cord

eyelet,

1.5.x

2

Fig.

2-5

SECTION

3

CIRCUIT

ADJUSTMENTS

Preparation

Test

Equipments/Tools

Required:

Rf

signal

generator

(for

a-m)

VTVM

rf

signal

VTVM

8

Q

resistor

generator

festiset

earphone

Screwdriver

for

alignment

TX

jack

ke

Preparation:

VTVM

Connection:

‘a

To

earphone

jack

with

8

Q

load

resistor

in

parallel.

Oo

pel

eeeeeeeen

oe

sae

hig

Se

8

Qlresistor

Modulation:

1-kHz

30-%

amplitude-modulated

signal

VOL

Control

Setting:

MAX

Fig.

3-1.

|

Fm

frequency

coverage

and

tracking

SQUELCH

Control

Setting:

OFF

adjustment

setup

3-1.

IF

ALIGNMENT

Rf

Signal

Generator

Frequency

10.7

MHz

(1

kHz

30%

a-m)

Rf

Signal

Generator

Coupling

VTVM

Connection

See

Fig.

3-1

and

Fig.

3-2

Earphone

jack

with

8

Q

load

resistor

in

parallel

Remarks

VOL

control

SQUELCH

control

:

MAX

OFF

Adjust

for

maximum

meter

reading.

3-2.

FREQUENCY

COVERAGE

AND

TRACKING

ADJUSTMENT

Rf

Signal

Rf

Signal

Receiver

Adjustment

Generator

Generator

Dial

Adjust

Remarks

Coupling

Frequency

Setting

Frequency

See

Fig.

3-2

107.0

MHz

Fully

osc

coil

Adjust

for

maximum

meter

Coverage

left

L3

reading.

VOL

control

>MAX

137.5

MH

sc

z

oe

SQUELCH

control:

OFF

trimmer

CT2

Tracking

108

MHz

Tune

to

rf

coil

108

MHz

LE?

signal

136

MHz

Tune

to

rf

trimmer

136

MHz

CT

1

signal

from

rf

S)

Signal

generator

rf

trimmer

osc

coil

L3

osc

trimmer

CT2

cT1

rf

coil

L2

MFT

1

IFT

4

IFT

2

IFT

3

SECTION

4

MOUNTING

AND

SCHEMATIC

DIAGRAM

MOUNTING

DIAGRAM

—

Component

Side

—

SGG1S1

4-1.

ld

a

E8EEST

410

010

G9ELGStT

:-

8D0'LO

4)

S

100

GAN

°

189

wo

20

22'0

Ag

Be

aod

on

FEOVIST

“90

G0

‘vO

a

WIL

SO

IOEEISE

€0

q

em

2

OL89SE

-

60

Ollose

*

20°10

-8460

4-2.

MOUNTING

DIAGRAM

—

Conductor

Side

—

LL-G9L-L8S-L

“ON

24eq

‘pseog

NID

payulig

SWMIOA

HO13N0S

ay

ANV

131

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A9

6d

10°0

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60

AOWLY'O

azz

£69

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A

ee

i

Zipot-o

go

Ue

wa

oD

AS2/OL

i

”

SRS

aN

ae)

PEN,

APA

:

obo

Z

a

ao

.

‘

wt

eg

oat

:

8%

200

ae

so

apesraeer

ee

OF

S|

WEES

9)

SSS

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;

H

mace

|

9ty

>

nl

o—AF—o

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aa

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ee

2

a0

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tH

|

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eg

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the

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924

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4070

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AQ

sodb.a,

3ZIS

Live

aly]

yuge

———

rage

>

CR

SS

Yy3MOd

ix3a

SNOHdYv3a

SCHEMATIC

DIAGRAM

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YaMOd

1x3

ef

SNOHduV3

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AQL

Zb'o|

(HOS

“$a9Ue19}0}

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peace

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AS

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269

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Htloge

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1¢9

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$1

HOTANOS

99V

==

edWv

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zdWv

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===

tdwv

I

XIW

dV

3a”

gelase

80

9¢elase

2D

ge0vdS2

90

geopose

SO

8e0v0S2

bd

OlL9S2

2d

o1Z9S2

10

10'O

9b0

:Sa10N

sooo

(so

sissbyo

Of

-8460

SECTION

5

EXPLODED

VIEW

AND

PACKING

5-1.

EXPLODED

VIEW

(1)

Parts

marked

>

are

included

in

carrying

handle

ass’y

(X-38405-84-1)

¥

3-835-432

arm,

carrying

handle

Ww

%

3-835-431

carrying

handle

Parts

marked

©

are

included

in

battery

lid

ass’y

(X-38405-87-1)

@

ow

Parts

marked

{J

are

included

in

rear

cabinet

ass’y

(X-38405-89-1)

Se

S

*

3-840-504

:

Parts

marked

a

are

included

in

main

cabinet

ass’y

(X-38405-88-

Fees

von

vids

neath

-)

re

i

in

in

cabinet

ass’y

(

5-8

8-1)

.

‘

1

4

3-840-515

*

3-836-433

sash

*

7-685-234-21

spacer,

carrying

handle

H

*

7-685-134-21

screw,tapping

®

K

2.6

x

8

screw,

tapping

®

P2.6x

8

*

7-623-107-15

washer,

2.6

b

4

3-840-506

fiber

washer

4

7-623-639

eyelet

4x5

443-835-460

cushion,

100

x

10x

9

a3-835-401

cabinet,

main

1-502-183

|

speaker

ee

3-804-510

|

retainer,

speaker

|

7-623-508-01

lug

3b

3-835-443

7-621-722-46

_-4

“oe

-

@

oe

as

battery

negative

4

3-835-446

ornamental

plate,

front

screw,

tapping

®

PZ

x6

1-507-050-51

jack,

earphone

a

ee

1-507-261-11

fack,

ext

power

7-633-120-52

dial

cord,

0.25

p

7-685-134-27

screw,

tapping

®P2E6x8

113-822-524

label,

caution

7-684-035-01

nut

5

7-623-212-12

spring

washer

5

$

2

~

:

Bs

a

Re

3-811-538

(213-835-462

3.

..

x

:

cushion

,

A

Battery

tape

terminal

plate,

antenna

<<

AIR

(139-835-411

é

ew

>

aa

rear

cabinet

i

(

3-835-412

SSS

Ie

BO

ene

Le

4

{J

3-840-505

XP

cushion

220

x

6

(13-835-461

O3-840-531

cushion

80

x

10

spacer,

battery

cover

)3-840-510

plate,

specification

©3-809-058

(|3-835-466

cushion,

battery

cushion

scents

OP

gx42

(J3-835-466

3-835-467

cushion

washer,

telescopic

antenna

(17-621-255-52

1-601-072

:

screw

O®P2x8

antenna,

telescopic

(353-823-309

antenna

catch

—10—