Vertex Vx-10 User manual

'-

-

vertex®

VX-10

VHF Band

Service Manual

~

vertex

1 2 3 A

r~

= =

=~

4 5 6 B

C) C)

C)

6666

Shown with optional FTT-15 installed

YAESU MUSEN CO., LTD.

1-20-2 Shimomaruko, Ota-Ku, Tokyo, 146,

Japan

YAESU U.S.A.

17210

Edwards

Rd., Cerritos, CA 90703, U.S.A

YAESU INTERNATIONAL SALES, (Caribbean, Central & So. America)

7270

NW

12th St., Suite 320, Miami,

FL

33126, U.S.A.

YAESU EUROPE B.V.

Snipweg

3,

1118DN Schiphol, The

Netherlands

YAESUUKLTD.

Unit

2,

Maple Grove Business Centre,

Lawrence Rd., Hounslow, Middlesex, TW4 6DR, U.K.

YAESU GERMANY

GmbH

Am

Kronberger

Han

2,

D-65824 Schwalbach,

Germany

YAESU

HK

LTD.

11th Floor Tsim Sha Tsui Centre, 66

Mody

Rd.,

Tsim Sha Tsui East, Kowloon,

Hong

Kong

Contents

"-

1,

General

Introduction

..................................................................................................... 1-1

Chip

Component

Information

..................................................................... 1-2

Operating

Manual

Reprint

........................................................................... 1-5

Transceiver

Disassembly

..................................................................

.'

......... 1-13

Exploded

View

&

Miscellaneous

Parts

.................................................... 1-15

Circuit

Description

.......................................................................................

l-17

Block

Diagram

.............................................................................................. 1-23

2,

Servicing

Alignment

........................................................................................................ 2-1

Contponent

Applications

.............................................................................. 2-5

IC

Data

.............................................................................................................. 2-7

~

3,

Board

Unit

(Schematics,

Layouts

& Parts)

RFUnit

...........................................................................................................

3A-1

CNTL

Unit

..................................................................................................... 3·8-1

VR

Unit

.......................................................................................................... 3C-1

FTT

-14

Keypad

.............................................................................................3D-1

FTT-1516-Button

DTMF

Paging

Keypad

w/Voice

Encryption

......... 3E-1

~'

~~----------------

Cut

out

the

label

at

the

right,

and

place

it

behind

the

clear

plastic

window

in

the

spine

of

the

manual.

1

'-W

VX-10

:

~v

VHF

Band

Service

Mc._,ual

L

________________

_

-

~

-

~'

------------------Introduction

G

G a )

~

~(=

=

))

vertex

1 2 3 A

~

c::=>

4 5 6

c::=> c::=> c::=>

7 __!L_ 9

c::=>

L_)

c::=>

* 0 #

c::=> c::=> c::=>

~~

Shown with optional FTT-15 installed

The Yaesu

VX-10

is a compact

hand

portable

transceiver for the VHF land mobile

bands

that

offers the convenience of small size, light weight,

and

simple operation. The

VX-10

can be simply

programmed

by

your

Yaesu Dealer

with

up

to

40

(FTT

-14)

or

102

(FTT

-15) channels for bothsin-

gle

and

splitfrequency operation. The

VX-10

pro-

vides

up

to 5

watts

of

RF

output

power

and

in-

cludes a flexible quick-connect antenna.

The transceiver

and

Ni-Cd

battery

packs are

constructed of thick high

impact

polycarbonate

plastic, with special attention

paid

by the design-

ers

to

tight

sealing

and

ruggedness,

assuring

years

of reliable

operation

even

in

harsh

envi-

ronments.

The following

pages

describe the

operation,

features

and

accessories ofthe

VX-10.

With

prop-

er

care

and

operation, the transceiver will

pro-

vide

many

years of reliable communications.

1-1

VX-10 VHF Band Service Manual

Chip

Component

Information---------

The

diagrams

below

indicate

some

of thedis-

tinguishing

features

of

common

chip

compo-

nents.

Capacifors

Tantalum Capacitors

Resistors

H

T

Indica

ted

Letters

1 2 3 4 5 &7 : ' 0 •

(Unit:

mm)

Type

L w H

1/10

2.0 1.25 0.5

1/16

1.6 0.8 0.45

1/165

1.0 0.5 0.35

1-2

(Unit:

mm)

Type

L w H

2125 2.0 1.25 0.35

~

0.5

1608 1.6 0.8 0.65

~

0.95

1005 1.0 0.5 0.45

~

0.55

(Unit:

mm)

Type

L w

HI

p 2.0 1.25 1.2 I

A 3.2 1.6 1.6

B 3.4 2.8 1.9

c 5.8 3.2 2.3

Marking* 100, 222, 473

...

1147311

I I

Ten

unit

One

unit

Multiplier

code

•

0

1

2

3

4

5

6

7

8

9

0

1QO

1 101

2 102

3 103

4 104

5 10"

6 106

7

10

7

8 108

9 109

Examples:

100=10Q

222=2.2kQ

473=47kQ

~

"---'.

VX-10

VHF

Band

Service Manual'-.../

-.,

~

~'

,-,

Chip

Component

Information

Replacing Chip Components

Chip

components

are

installed

at

the factory

by

a series

of

robots. The first

one

places a

small

spot

of

adhesive

resin

at

the

location

where

each

part

is

to

be

installed,

and

later

robots

handle

and

place

parts

using

vacuum

suction.

Forsingle

sided

boards,

solderpaste is applied

and

the

board

is

then

baked

to

harden

the resin

and

flow the solder.

For

double

sided

boards,

no

solder

paste

is

applied,

but

the

board

is

baked

(or

exposed

to ultra-violet light) to

cure

the

resin

before

dip

soldering.

In

our

laboratories

and

service

shops,

small

quantities of

chip

components

are

mounted

man-

ually

by

applying

a

spot

of

resin,

placing

with

tweezers,

and

then

soldering

by

very

small

dual

streams

of

hot

air

(without

physical contact

dur-

ing

soldering).

We

remove

parts

by

first

remov-

ing

solder

using

a

vacuum

suction

iron,

which

applies

a light

steady

vacuum

at

the iron tip,

and

then

breaking

the

adhesive

with

tweezers.

The

special

vacuum/

desoldering

equipment

is

recommended

if

you

expect to

do

a lot

of

chip

replacements.

Otherwise,

it is

usually

possible

to

remove

and

replace

chip

components

with

only

a

tapered,

temperature-controlled

solder-

ing

iron,

a

set

of

tweezers

and

braided

copper

solder

wick.

Soldering

iron

temperature

should

be

below

280°C (536°F).

VX-10 VHF Band Service Manual

Precautions for Chip Replacement

0

Do

not

disconnect

a

chip

forcefully,

or

the

foil

pattern

may

peel off

the

board.

0

Never

re-use a

chip

component.

Dispose

of

all

removed

chip

components

immediate-

ly

to

avoid

mixing

with

new

parts.

0 Limit

soldering

time to 3

seconds

or

less to

avoid

damaging

the

component

and

board.

Removing

Chip Components

0 Remove the

solder

at

each joint,

one

joint

at

a

time,

using

solder

wick

whetted

with

nona-

cidic fluxes as

shown

below.

Avoid

applying

pressure,

and

do

not

attempt

to

remove

tin-

ning

from

the

chip's

electrode.

~

0

Grasp

the

chip

on

both

sides

with

tweezers,

and

gently

twist

the

tweezers

back

and

forth

(to

break

the

adhesive

bond)

while

alternate-

ly

heating

each electrode. Be careful to

avoid

peeling

the

foil traces

from

the

board.

Dispose

of

the

chip

when

removed.

0 After

removing

the

chip,

use

the

copper

braid

and

soldering

iron

to

wick

away

any

excess

solder

and

smooth

the

land

for installation

of

the

replacement

part.

1-3

Chip

Component

Information

Installing a Replacement Chip

As

the

value

of

some

chip

components

is

not

indicated

on

the

body

of

the

chip,

be

careful to

get

the

right

part

for replacement.

0

Apply

a

small

amount

of

solder

to

the

land

on

one

side

where

the

chip

is

to

be

installed.

Avoid

too

much

solder,

which

may

cause

bridging

(shorting

to

other

parts).

0

Hold

the

chip

with

tweezers

in

the

desired

position,

and

apply

the soldering

iron

with

a

motion

line as indica

ted

by

the

arrow

in

the

diagram

below.

Do

not

apply

heat

for

more

than

3 seconds.

-.

..~,..,._----

0 Remove the tweezers

and

solderthe elec trode

on

the

other

side in the

manner

justdescribed.

1-4

'-'

\_I

"-"

''--"

V.X-10 VHF Band Service

Manual

Operating Manual Reprint

'-

Controls & Connectors

Busy/Tx

LED

(Green

on

"Busy",

Red

on

"Transmit")

Channel Selector

Antenna

Jack

PTT (Push

To

Talk)

Switch

ll

Monitor

Button

----611

LCD

(Liquid

Crystal Display)

Lamp/Lock

Button

Speaker External

Mic/Earphone

Jack

Power

Switch

vertex

FM TRANSCEIVER

V8f(8X

-\

00

choice

of

2-

or 16-key 4

5_j__B

C) C)

L_)

C)

~

6

6 6

6~

A B -keypad (installed

by

-

6666

Before You Begin

Battery Installation

and

Removal

your dealer)

Refer

to

the

illustration

below

showing

the

rear

panel

of the VX-10

and

its

battery

pack.

0 Lay thebatterypacklooselyonto the rear panel

of

the

transceiver,

and

carefully

mate

the four

small

alignment

tabs

on

the battery

with

their

corresponding insertion slots

on

the transceiv-

~

er

case.

Proper

alignment

occurs

with

the bat-

tery

pack

offset

about

%" from

the

top

of

the

case.

~

rear view with battery

pack installed

VX-10 VHF Band Service Manual

battery pack contact pins

0

Guide

the

pack

into the slots

with

a slight in-

ward

pressure, then slide the

battery

pack

up-

ward,

until it locks in place

with

a "Click".

0 To

remove

the battery,

turn

the

radio

off

and

remove

any

protective cases. Press in

the

Bat-

tery Release

button

(behind the

Antenna

jack)

while

sliding

the

battery

down

Y2''.

Then

lift

the

battery

away.

&

Do

not attempt

to

open

any of there-

chargeable

Ni-Cd

packs,

as

they could

explode

ifaccidentally short-circuited.

Low

Battery Indication

0 As

the

battery

discharges

during

use, the volt-

age

gradually

becomes lower.

When

the

bat-

tery voltage reaches

6.0

Volts, the

battery

pack

should

be

recharged

and

another

battery

should

be installed in its place. The

"~"

icon

will blink in the display

when

battery

voltage

is low.

1-5

Operating Manual

Reprint----------

0

Avoid

recharging

Ni-Cd batteries

often

with

little use

between

charges, as this can

degrade

the

charge

capacity. Yaesu

recommends

that

you

carry

an

extra,

fully-charged

pack

with

you

so the operational

battery

may

be

utilized

untildepletion (this "DeepCycling" promotes

better

long-term

battery

capacity).

Operation

Before

You

Begin

0 Install a

charged

battery

pack

onto

the

trans-

ceiver, as described previously.

0 Screw the

supplied

antenna

onto

the

Antenna

jack.

Never

operate

this

transceiver

without

an

antenna

connected.

0

If

you

have

a

Speaker

/Mic,

we

recommend

that

it

not

be connected until

you

are

familiar

with

the basic

operation

of

the

VX-10.

aiL

0

Ul~

Operating

the

VX-10

0 To

turn

the

radio

on,

push

and

hold

in the

orange

[PWR]

but-

ton for

lh

second.

1-6

antenna

installation

belt clip

installation

slide lever left

to release

00*

ra1ls

~(«

~

~~

a a

C) C)

C)

0

Turn

the

top

panel

Channel

Selector to

choose

the

desired

operating

channel.

A

channel

number

or

channel

name

will

appear

on

the

LCD.

(

0

Rotate

the

lower,

outer

ring

of

the

Channel

Selector

knob

to

set

the

Volume

level.

If

no

signals arebeing re-

ceived,

you

can

preset

the

Volume

level

on

back-

ground

noise

by

the

following

proce-

dure.

~·

I I

:..ct"

..L

CD

Press

the

Monitor

button

(the

middle

but-

ton

on

the left side)

once

to activate

the

"o:J"

icon, then press

and

hold

in

the

Monitor

But-

tonfor one second to

open

theSquelch

man-

ually.

@

Rotate

the

Volume

control

for a

comfort-

able

Volume

level

on

the noise.

® Press

the

Monitor

button

once

again

to re-

activate

the

Squelch.

'-"

~

0 To transmit, press

and

hold

in

the

[PTT]

switch.

'-"

Speak

into

the

microphone

area

of

the

front

panel

grille

(lower

right-hand

corner)

in

a

normal

voice.

To

return

to

the

Re-

ceive

mode,

release

the

[PTT]

switch.

TX~

RX~

\

0

If

a

Speaker

/Mic

is

available,

it

may

be

plugged

into

its jack

on

the

right

side

of

the

transceiver.

Hold

the

speaker

grille

up

your

ear

in

the Receive

mode.

To

transmit,

VX-10

VHF

Band

Service

Manual

'-"

press

the

Speaker/Mic's

[PTT]

switch, just as

~

·

you

would

on

the

main

transceiver body.

0 Press one of

the

"Soft Keys" ("A"

or

"8"

in the

Two-Key transceiverversion,

or

"A"~

"0"

on

the

16-Key version),

or

press

downward

mo-

mentarily

on

the ChannelSelector knob, to ac-

tivate oneofthe "Pre-ProgrammedFunctions"

which

may

have been

provided

at

the

time of

programming

by

the Dealer. See

the

"Appen-

dix" for a listing of available features.

Appendix

A.

Pre-Programmed

Functions

.·~

One

or

more

of

the

following functions

may

have

been

activated

by

your

Dealer

at

the

time

of

programming

of

the

radio. The functions will

have

been

assigned

to

the

"A"

and

"B" keys in

the

Two-Channel

transceiver

version,

the

"A"

through

"D" keys

on

the

Four-Channel version,

and/

or

the

Channel

Selector Knob (hereafter re-

ferred to as

'The

Knob").

• Scanning

<<This

section

subject

to

changere

USR

SCAN>>

Scanning

rapidly

steps

through

each

of

your

assigned channels, looking for incoming calls.

~

If

a call is

detected,

Scanning

stops

on

that

channel,

then

resumes a few seconds after

the

incoming transmission ends.

Two

Scanning

modes

are

available:

"User"

Scan

and

"Dealer" Scan. The "USR SCAN" dis-

play

means

that

the

User can

edit

the

channel

scan list, while "DLR SCAN"

means

that

only

the

Dealer can

edit

the

scan list.

To

start

Scanning,

momentarily

press

the

as-

signed

button

(A,

B,

C,

or

D)

or

the

Knob. To

cancel Scanning, press

the

same

button.

Operating Manual Reprint

•

Dual

Watch

Dual

Watch

automatically checks for activity

on

a

priority

channel,

while

operating

on

an-

other

channel ("Priority" is assigned to the

first

channel

of

the

currently-selected

Group). A

small"DW"

is displayed

at

the

top

of

the

LCD

when

Dual

Watch is active.

To start

Dual

Watch operation, press the Deal-

er-designatedbutton

(A,

8,

C,

or

0)

or

theKnob

momentarily.

About

every

1

Y2

seconds,

the

re-

ceiver will briefly check

the

Priority

channel,

looking for

an

incoming call.

When

a signal is received

on

the

Prioritychan-

nel,

Dual

Watch

will

pause

and

the

channel

number

or

name

tag

for

the

Priority

channel

will be displayed.

Dual

Watch will

resume

af-

ter

the

station

on

the

Priority

channel

stops

transmitting.

To cancel

Dual

Watch, press

the

Dealer-desig-

nated

button

(A,

8,

C,

or

D)

or

the

Knob

mo-

mentarily

again.

•

LOW

Transmit

Power

Pressing the Dealer-designated

button

switch-

es

the

radio's

transmitter

to a

"Low

Power"

mode,

thus

allowing

greater

battery

life.

The "1

'7'

1

t icon will

be

illuminated in this case.

•

Talk

Around

In

duplex

channelsystems (separate receive

and

transmitfrequencies, utilizing a "repeater" sta-

tion),

Talk-Around

allows

you

to

bypass

the

repeater

station

and

talk

directly

to

a

station

that

is nearby. This feature

has

no

effect

when

operating

on

"simplex" channels,

where

there-

ceive

and

transmit

frequencies

are

the

same).

·~

VX~-·1·0~V1l~F~B·a·n~d~S~e·rv•i•ce•Af~a·n•u•a~l

........................................................

...

1-7

Operating

Manual

Reprint-----------

• Channel Group Selection

TheVX-10 is capable of

separating

its 102

mem-

ory

channels

into

any

of

nine

groups.

There

is

no

limit

to

the

number

of

channels

in

each

group.

Pressing

the

assigned

button

(A,

B,

C,

or

0)

or

the Knob allows the

operator

to toggle

between

the

available

groups.

Channels

within

the

se-

lected

group

may

then

be

selected

using

the

Channel

Selector Knob.

•

TX

Save Off

This feature, if selected, disables

the

Transmit

Battery

Saver,

which

reduces

transmit

power

when

a

very

strong

signal

from

an

apparently·

nearby

station

is

being

received.

Press the

assigned

button

(A,

B,

C,

or

0)

or

the

Knob

to

disable

the

Transmit

Battery

Saver, if

you

are

operating

in

a

location

where

high

power

is

almost

always

needed.

• Set Function (Menu)

The

"Set Function" allows

the

user

to

custom-

ize

certain

performance

parameters

as

need-

ed.

• Squelch

Call

(16-Key

Pad

Type Only)

This

feature

allows

the

user

to

change

the

3-

digit

Squelch Call code,

used

to call

other

sim-

ilarly-equipped

stations.

Press

the

assigned

button

(A,

B,

C,

or

0)

or

the

Knob,

followed

by

the

three

digits

of

the

Squelch

Call

code

of

the

station

you

wish

to

call.

Three

tones

will

be

heard

after the last key

is

pressed

(the

code

will

now

be

transmitted).

The

receiver

squelch

of

the

other

station

will

'._./

be

opened,

and

you

can

commence

talking.

B.

Set Function (Menu)

The user-accessible "Set

Function"

allows

the

operator

to

customize

certain

performance

fea-

tures

of

the

VX-10.

Two

methods

of

activating

the

Set

Function

are

available:

CD

If

the

Dealer

has

assigned

"Set

Function

Access"

to

one

of

the

"Pre-Programmed

Function"

keys,

pressing

the

assigned

key

(A,

B,

C,

or

D)

will activate

the

feature.

@

If

the

Dealer

has

assigned

"Set

Function

Access" to

the

Channel

Selector Knob, press-

ing

downward

on

the Knob will activate

the

Set Function.

Once

the

Set

Function

is active,

the

following

procedure

is

used

to recall

the

desired

Menu

item

for editing:

0

One

the

Set

Function

is

activated,

rotate

the

Channel

Selector

Knob

to

step

through

each

of

the

available

16

functions;

once

the

desired

function is

found

(see

the

Table below),

push

the

[A]

button

to

view

the

current

setting

of

that

function.

0

Rotate

the

Channel

Selector

Knob

to

select

a

different

setting

(or to

enable/

disable it),

then

press

the

[8]

button

to

save

the

new

setting.

0 Press the

assigned

button

(A,

B,

C,

or

0)

or

the

Channel

Selector

Knob

to

exit

the

Set

Func-

tion

mode.

·~

''._./

1-8

----------------------------------------

','._./

VX-10 VHF Band Service

Manual

Knob/Button

~[A]

button

Function

Scanning

Dual

Watch

~

·~

[8]

button

Low

Transmit

Power

Talk

Around

Channel

Group

Code

Squelch Call

TX

Save Off

Set-Function

Scanning

Dual Watch

Low Transmit

Power

Talk

Around

Channel

Group

Code

Squelch Call

TX

Save Off

Set-Function

[C]

button

(on 16-key version) Scanning

Dual Watch

Low Transmit

Power

Talk

Around

Channel

Group

Code

Squelch Call

TX

Save Off

Set-Function

[D]

button

(on 16-key version) Scanning

Dual

Watch

Knob

Low Transmit

Power

Talk

Around

Channel

Group

Code

Squelch Call

TX

Save Off

Set-Function

Scanning

Dual

Watch

Low Transmit

Power

Talk

Around

Channel

Group

Code

Squelch Call

TX

Save Off

Set-Function

-Operating

Manual Reprint

Set Function

List

The table

below

outlines

the

various

functions

that

are availablefor

user

editingvia theSet Func-

tion (described above).

Display Description Selections

SOl

SQL Squelch Level Level

0*-

12

*0

=SQL

open

S02

LIST Scan

Mode

Dealer

/User

S03

BEEP

Keypad

Beeper

On/Off

S04 BELL CTCSS/DCS Bell

On/Off

SOS

LITE TX/BUSY LED

On/Off

S06 LOCK Locks Controls Key, PTT,

or

Knob

S07TAG

Channel

Name

Tag

On/Off

S08 GRP

Channel

Groups Groups

1-9

S09

SCAN Scan

Mode

On/Off

S10DW

Dual

Watch

On/Off

S11

TXPO Transmitter

Power

High/Low

S12TA

Talk

Around

On/Off

S13

ENCR Encryption

On/Off

Display Description Selections

S14 TEL Telephone

Number

Memory

Recall

Channell

-10,

Off

SIS TSAV

Transmit

Battery Saver

On/Off

S16 DTMF

DTMFCode

Memory

Select

Channel

1 - 10

C.

ARTS (Auto Range Transpond System)

This

system

is

designed

to

inform

you

when

you

and

another ARTS-equipped station

are

within

communication

range.

If

you

move

out

of

range

for

more

than

two

minutes,

your

radio senses

that

no

signal

has

been

received,

a

ringing

beeper

sounds,

and

II

@

"appears

on

the

LCD.

If

you

subsequently

move

back

into

range,

as

soon

as

the

other

station

transmits,

your

radio's

beeper

will

sound,

and

11

8"

will

appear.

During

ARTS operation,

your

radio

automat-

ically

transmits

for

about

1

second

every

25

sec-

onds

(the interval is

programmed

by

the

Dealer)

in

an

attempt

to

"shake

hands"

with

the

other

station.

~

----------------------------------------------------------

VX-10 VHF Band Service

Manual

1-9

Operating

Manual

Reprint-----------

o.

DTMF

ANI

System

This

system

is a

standard

ANI

(Automatic

Nu-

meric

Identification)

sequence

that

may

be

pro-

grammed,

by

the

Dealer, to

be

sent

whenever

the

PTT

switch

is

pressed

or

released.

E.

DTMF Paging System

This

system

allows

paging

and

selective call-

ing,

using

transmitted

DTMF (DualTone, Multi-

Frequency)

sequences. Your receiver

remains

si-

lent

until

it

receives

DTMF

digits

that

match

those

stored

in

a special

"DTMF

Code"

memory

in

your

transceiver.

The

squelch

then

opens

so

the

caller is

heard,

and

an

alert

ringer

sounds.

When

a

"DTMF

Paging"

call

opens

your

ra-

dio's

squelch,

you

can

begin

your

operation

as

usual.

DTMF

Paging

"hangs"

open

for

about

three

seconds

after

the

received

carrier

drops,

to

give

you

time

to

respond;

thereafter,

it

resets

the

system.

Each

time

you

transmit,

you

will

hear

DTMF

tones;

remember

to

pause

a

moment

before

speaking,

as

the

code

is

being

sent

on

your signal

at

the

beginning

of

each

transmission.

You

will

not

hear

the

other

station's

DTMF

tones

the

first

time

you

receive a call, as

your

squelch

does

not

open

until

after

the

tones

are

decoded.

After-

wards,

however,

you

will

hear

the

DTMF

tones

so

long

as

your

radio's

squelch

remains

open.

F.

Alpha-Numeric

Cfumnel

Names

("Channel

Nametags")

The

Dealer

may

program

Alpha-Numeric

des-

ignators

to

each

channel, to

aid

in

the

user's

rec-

ognition

of

each

channel.

These

"Channel

Nametags"

may

be

activated,

in

lieu

of

the

stan-

dard

"CHAN

1"

type

display.

To

enable

or

disable

the

Channel

Nametags:

0

Enter

the

Set

Function,

and

select

Menu

item

SO?

("TAG").

0

Push

the

[A]

button

momentarily

to

view

the

current

selection.

0

Now

rotate

the

Channel

Selector

knob

to

change

the

setting

to

the

desired

state

(Tags

On

or

Off).

0

Press

the

[8]

button

to

save

the

new

setting,

then

press

downward

on

the

Channel

Selec-

tor

knob

momentarily

to exit the Set Function.

1-10 VX-10 VHF Band Service

Manual

'-~

~

'-""

--

-

General

Frequency

range:

Number

of

channels:

Channel

spacing:

Battery voltage:

Temperature

range:

Case

size

(WHD):

Weight

(approx.):

Receiver

Circuit

type:

IFs:

12-dB

SINAD

Sensitivity:

Squelch

Sensitivity:

Selectivity:

Intermodulation:

Spurious

rejection:

Image

rejection:

Channel

frequency

spread:

AF

output:

Transmitter

Power

output:

Frequency

stability:

Operating Manual Reprint

Specifications

134

~

160, 148

~

174

MHz

40 (FTT-14)

or

102 (FTT-15)

12.5/25/30

kHz

7.2VDC

-30

oc

to +

60

oc

57 x

99

x 46

mm

(w/FNB-V47)

380

gramswith

FNB-V47,

antenna,

belt clip

Double-conversion

superheterodyne

17.70

MHz

&

450kHz

< 0.2,uV ,

< 0.25

,uV

<

60

dB (12.5

kHz),<

70dB (25/30 kHz)

>

70dB

>

70dB

>

70dB

26MHz

0.5

W@4

Q ( ±5% THD)

5.0/2.5/1.0/0.1

W (Selectable,

0.1

W to 5.0 W Adjustable)

better

than

±5

ppm

-,

Modulation

system: Direct FM

-

Maximum

deviation:

FM

Noise(@

1kHz):

Spurious

emissions:

AF

distortion(@

1kHz):

Microphone

type:

(±2.5

kHz

or)

±5kHz

better

than

-40 dB

>

65

dB

below

carrier

<5%

2-kQ

condenser

Specifications are

subject

to change

without

notice.

Frequency ranges and channel spacing vary according to transceiver version; check with

your

dealer.

~~~~~--~--~------------------------------------------1-11

VX-10 VHF Band Service

Manual

Operating

Manual

Reprint

Notes:

'--"'

'-

'-'

1-12 VX-10 VHF Band SenJice

Manual

·~·

Transceiver

Disassembly

...........

, The VX-10

must

be

partially disassembled to

perform

a complete alignment. 0

Grasp

the

transceiver

with

both

hands,

then

gently remove the internal assembly from the

case

using

by

pressing

on

it gently

with

even

pressure

from

both

thumbs,

then

sliding

out

from the case

at

an

angle (Fig. 3).

1"-

l '

-

-.

Case

Removal

Before beginning,

turn

the

radio

off,

remove

the knob,

and

the

battery

pack.

0 Lay

the

transceiver

on

a flat surface

covered

with

a soft cloth to protect the front case from

marring,

then

remove the two rear-panel case

screws (Fig. 1).

Figure

1.

0 Remove

the

keypad

unit

from the front

panel

by

using

your

fingernails to

grasp

both

side

of

the

unit

and

lift it free (Fig.

2).

Figure

2.

Figure

3.

0 Remove

the

small silicone LED lens from

the

case

by

pressing

on

it from the inside.

This provides access

to

all user-serviceable ad-

justments,

further

disassembly

is

not

recom-

mended.

Refer repairs

to

your

nearest Yaesu-autho-

rized service center.

0 Reassemble the

unit

in

reverse

order.

When

re-inserting the internal

unit

and

keypad

into

the

case,

ensure

their

rubber

gaskets

are

not

pinched,

and

rest

firmly

within

the

ridge

en-

circling their frame

and

transceiver case.

---------------------------------------------------------------1-13

VX-10 VHF Band Service Manual

~-~v-nu_V_W_3_J!-~-3S_P_U_Vff_d_HA_.O_l--XA-------------------------------------------v~-l

:S3JON

------------

AJqmassPS!Q

laA!a~suell

------Exploded

View

&

Miscellaneous

Parts

~

,..-.

Description I

Qty.

TAPTITE SCREW 2 X 3.3

Ni

2

U9900064 ITAPTITE SCREW

M2

X 10

Ni

GUIDEI 2

U9900066 ITAPTITE SCREW M

1.

7 X 3

Ni

#1

I 1

U441

040021 TAPTITE SCREW

M2

X 4

Ni

I 3

U9900069 ITAPTITE SCREW M2 X 9.5 #2

R7152910B

DOUBLE FACE WINDOW

R3152470

RUBBER CAP (YER)

R3521540B

VOLUME KNOB

R3152450

LIGHT GUIDE

S6000324

MICRO-TEX

R7153490

SHEET (WINDOW)

R3152460A

MIC HOLDER RUBBER

CNTL UNIT

RFUNIT

~

R3521580

0 RING (REAR CASE)

Non-designated parts are available only

as part of a designated assembly. R6147510

RING NUT

FTT-15 (selectable)

FTT-14 (selectable)

CS1516001

·-----PANEL

ASS'Y

(W/SP NET, PACKING PAD

(YER),)

CAP

R3521630

__L----- RUBBER KNOB (POW)

(\

R3521570

.·••·

RUBBER KNOB (PTT)

CS1475001

SPEAKER ASS'Y

(W/ SPRING CONNECTOR)

&CAUTION

The

mic

element

must

be

desoldcred

and

remove<.:l

from

the

PCB

on

order

tore-

install its

protective

rubber

cover.

Therefore,

be

careful

not

to

remove

this

cover

unless

mic

element

repl<~cement

is

necessary.

R3153940

CD

n

~l;J

•

p

PACKING PAD (POW)

CP5564001

REAR CASE ASS'Y

(W/ SMA CONNECTOR)

&CAUTION

The

battery

terminal

p<~cking

p<~J

de-

sign is recessed,

and

must

be

installed

into

the

PCB

correctly

to

allow

proper

tr;;msceiv-

er

reassembly. Refer to

the

drawing

below

to

confirm

proper

seating

of

the

pad.

~

A 8 '-....pes

~

~VX~-·10

..

VH

..

F

..

B•a•n•d•S•e•rv

..

ic•e•A1

..

a•n•u•a•l

............................................................

.

1-15

~~v-nu_v_w_~~-'ru-~-s-pu_v_u~-EM._o.r--XA._

______________________________________

g~-~

:So:f-DN

------

stJ-ed

snoau-e11aJs!w

~

Ma!A

papo1dx3

~

Receive Signal

Path

Incoming

RF

from

the

antenna

jack is deliv-

ered

to

the

RF

Unit

and

passes

through

a

low-

pass

filter

and

high-pass filter consisting

of

coils

L1006, L1007, L1008, L1010, L1011 & L1012, ca-

pacitors

C1033, C1034, C1046, C1047, C1048,

C1049, C1050, C1064, C1076, C1077, C1081 &

C1082

and

antenna

switching

diode

D1008

(RLS135).

Signals

within

the

frequency

range

of

the

transceiver

are

then

amplified

by

Ql

019

(2SC5226-4/5)

and

enter

a

varactor-tuned

band-

pass

filter

consisting

of

coils L1015, L1016 &

,-,

L1017,

capacitors

C1017, C1087, C1089, C1090,

C1091, C1099, C1100,

C1108, C1111,

Cll12,

~.

C1113, C1158, C1162 & C1166,

and

diodes D1012,

D1013 & D1014 (all HVU350) before first mixing

by

Q1026 (SGM2016M).

Buffered

output

from

the

VCO

is

amplified

by

Q1001 (2SC5226-4/5) to

providea

pure

first

local

signal

between

116.3

and

156.3

MHz

for

injection

to

the

first

mixer

Q1026 (SGM2016M).

The

17.7

MHz

first

mixer

product

then

passes

through

monolithic crystal filters XF1001, XF1002

(17T1285, 7.5

kHz

BW)

to

strip

away

all

but

the

desired

signal,

which

is

then

amplified

by

Q1028

(2SC4215Y).

The

amplified

first IF signal is

applied

to FM

IF

subsystemIC

Q1020 (TA31136FN),

which

con-

tains

the

second

mixer,

second

local oscillator,

limiter

amplifier,

noise

amplifier,

and

S-meter

amplifier.

A

second

local signal is

generated

by

PLL ref-

erence

I

second

local

oscillator

Q

1018

(2SC2620QB)

from

the 17.25

MHz

crystal

XlOOl

to

produce

the

450kHz

second

IF

when

mixed

with

the

first IF

signal

within

Q1020.

The

second

IF

then

passes

through

the

ceram-

Circuit

Description

ic filter CF1001

to

strip

away

unwanted

mixer

products,

and

is

applied

to

the

limiter

amplifier

in

Q1020,

which

removes

amplitude

variations

in

the

450kHz

IF, before

detection

of

the

speech

by

the

ceramic

discriminator

CD1001

(CDBM450C24T).

Detected

audio

from

Q1020 is

applied

to

one

ofthe

user

selected Key Unitfor

de-emphasis

and

band-pass

filtering (see the Key Unit

Circuit

De-

scription),

and

then

past

the

volume

control

to

the

audio

power

amplifier

Q2021 (TDA7233D)

on

the

CNTL

Unit,

providing

up

to 0.5

Watts

to

the

optional

headphone

jack

or

4-Q

loudspeak-

er.

Squelch Control

The

squelch

circuitry

consists

of

a

noise

am-

plifier &

band-pass

filter

within

Q1020,

and

noise

detector

D1018 (DA221)

on

the

CNTL

Unit.

When

no

carrier

is received,

noise

at

the

out-

put

of

the

detector

stage

in

Q1020 is

amplified

and

band-pass

filtered

by

the noise amplifier sec-

tion

of Q1020

and

the

network

between

pins

7

and

8,

and

then

rectified

by

Dl018.

The

resulting

DC

squelch

control

voltage

is

passed

to

96

of

the

microprocessor

Q2001.

If

no

carrier

is received, this

signal

causes

pins

43

and

55

of

Q2001

to

go

low.

43 signals Q2018

(IMD1

OA)

and

Q2020 (UMH3N)

to

disable

the

supply

voltage

to

the

audio

amplifier

Q2021,

while

55

makes

Q2008 (FMG2) hold the

green

(Busy)

half

of

the

LED off,

when

these

pins

are

low.

Thus,

the

microprocessor

blocks

output

from

the

audio

amplifier,

and

silences

the

receiver

while

no

signal

is

being

received,

and

during

transmission.

When

a

carrier

appears

at

the

discriminator,

-

~------~------~------------------------------------------1-17

VX-10 VHF Band Service

Manual

Circuit

Description---------------

noise

is

removed

from

the

output,

causing

96

of

Q2001 to

go

high

and

the

microprocessor

to

turn

onthe

busy

LED via Q2008.

The

microprocessor

then

checks

the

CTCSS

chip

on

the

Key

Unit,

the

DTMF

decoder

chip

and

the

CDCSS

code

for

CTCSS

or

CDCSS

or

DTMF

code

squelch

information,

if

enabled,

re-

spectively.

If

not

transmitting

and

tone

squelch

or

CDCSS is

not

activated,

or

if the received tone

or

code

matches

that

programmed,

the

micro-

processor

stops

scanning,

if active,

and

allows

audio

to

pass

through

the

audio

amplifier Q2021

(TDA7233D) to

the

loudspeaker

by

enabling

the

supply

voltage

to it via Q2018

and

Q2020.

Transmit

Signal

Path

Speech

input

from

the

microphone

is deliv-

ered

to

the

CNTL

Unit,

where

itis

amplified

by

Q2025-4 (NJM2902V),

then

applied

to

one

of the

user

selected Key

Unit

for

pre-emphasis

(see the

Key

Unit

Circuit

Description).

The

pre-emphasized

audio

then

returns

to the

CNTL

UNIT,

to

provide

IDC

(Instantaneous

Deviation

Control),

and

the

splutter

filter

which

filters

the

speech

signal to

remove

any

high

fre-

quency

components

that

might

result

in

over-

deviation.

The

processed

audio

is

then

mixed

with

a

CTCSS

tone

generated

by

the

microprocessor

Q2001

and

delivered

to 01001

(155314)

for fre-

quency

modulating

the PLL carrier

up

to±

5kHz

from

the

unmodulated

carrier

at

the

transmit-

ting frequency.

If

an

external

microphone

is used, PTT switch-

ing

is

controlled

by

Q2022 (UMZ2N),

which

sig-

nals

the

microprocessor

when

the

impedance

at

the

microphone

jack

drops.

If

a CDCSS

code

is

enabled

for

transmission,

the

code

is

genera

ted

by

the

microprocessor

Q2001

and

delivered

to

D1017

(HVU202A)

for

'-'

CDCSS

modulating.

If

DTMF is

enabled

for

transmission,

the

tone

is

generated

by

the

microprocessor

Q2001

and

applied

to

the

splutter

filter

section

in

place

of

speech

audio.

Also,

the

tone

is

amplified

for

monitoring

in

the

loudspeaker.

The

modulated

signal

from

the

VCO

Q1002

(25C5231

C8/C9)

is

buffered

by

Ql

003

(25C5231

C8/C9)

and

amplifieu

by

Ql

001

(25C5226-4/5).

The

low-level

transmit

signal

is

then

applied

to

the

PA

module

Q1005 for final

amplification

up

to 5

watts

output

power.

The

transmit

signal

then

passes

through

the

~

antenna

switch

D1006 (RL5135)

and

is

low-pass

filtered to

suppress

away

harmonic

spurious

ra-

diation

before

delivery

to

the

antenna.

Automatic Transmit

Power

Control

RF

power

output

from

the

final

amplifier

is

sampled

by

C1026, C1027

and

is

rectified

by

D1004

(1

55321

).

The

resulting

DC

is fed

back

through

Q1004 (NJM2904V) to

the

PA

module,

and

thus

the

power

output.

The

microprocessor

selects

either

high

or

one

of

three

low

power

levels.

Transmit Inhibit

When

the

transmit

PLL is

unlocked,

2

of

PLL

chip

Q1015

goes

to

a logic low.

The

result-

ing

DC

unlock

control

voltage

is

passed

to

98

of the microprocessorQ2001. While

the

trans-

mit

PLL is

unlocked,

47

of

Q2001

remains

low,

which

then

turns

off the

Automatic

Power

Controller

Q1014

and

Q1004

(UMCSN,

NJM2904V)

to

disable

the

supply

voltage

to

the

transmitter

RF

amplifier

Q1005,

disabling

the

transmitter.

'-._/

1-18

VX-10VHFBandServiceManual

~

Vertex VX-10 User manual

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