Vertex VX-10 Service manual

'-

vertex®

-

-

Service Manual

~

vertex

2 3 A

1

4 5 6 B

C) C)

r~

6666

6666

Shown with optional FTT-15 installed

C)

= =

C)

=~

VX-10

VHF Band

YAESU MUSEN CO., LTD.

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

YAESU U.S.A.

17210

Edwards

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

NW

7270

YAESU EUROPE B.V.

Snipweg

YAESUUKLTD.

Unit

2,

Maple Grove Business Centre,

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

YAESU GERMANY

Am

Kronberger

YAESU

11th Floor Tsim Sha Tsui Centre, 66
Tsim Sha Tsui East, Kowloon,

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

12th St., Suite 320, Miami,

3,

1118DN Schiphol, The

GmbH

Han

2,

D-65824 Schwalbach,

HK

LTD.

Hong

FL

Netherlands

Mody

Kong

Japan

33126, U.S.A.

Germany

Rd.,

-

1,

General
Introduction
Chip
Operating

Component

Manual
Transceiver
Exploded
Circuit

Block

2,

Servicing

View & Miscellaneous

Description

Diagram

Alignment

Contponent
IC

3,

Board

RFUnit

CNTL
VR
FTT

Data

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

Unit

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

Unit

Unit

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

-14

Keypad

FTT-1516-Button

Contents

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

Information

Reprint

Disassembly

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

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

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

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

Applications

(Schematics,

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

Layouts

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

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

DTMF

Paging

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

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

.'

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

Parts

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

l-17

& Parts)

3A-1

Keypad

w/Voice

Encryption

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

"-

~

Cut
clear

out

the

plastic

label

at

window

the

right,

in

the

and

spine

place

of

the

it

behind

manual.

the

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

1

'-W

:

~v

L

________________

VHF

VX-10

Band

Service

~'

Mc._,ual

_

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

-

~

G

G

~(=

vertex

1 2 3

c::=>

c::=>

4 5 6

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

~

7 __!L_ 9

c::=>

L_)

* 0 #

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

Shown with optional FTT-15 installed

a )

~

=

c::=>
c::=>

))

A

~~

-

~'

The Yaesu
transceiver for the VHF land mobile
offers the convenience of small size, light weight,
and

simple operation. The
programmed
40

(FTT

-14)

and

gle
vides
cludes a flexible quick-connect antenna.

VX-10 VHF Band Service Manual

split frequency operation. The

up

or

to 5

VX-10

by

your

102

(FTT

watts

is a compact

VX-10

Yaesu Dealer

-15) channels for both sin-

of

RF

output

hand

can be simply

power

portable

bands

with

up

VX-10

and

that

to

pro-

in-

The transceiver
constructed of thick high
plastic, with special attention
ers

to

tight
years
ronments.

features
er
vide

of reliable

The following

care

many

sealing

and

accessories of the

and

operation, the transceiver will

years of reliable communications.

and

Ni-Cd

impact

and

ruggedness,

operation

pages

describe the

battery

polycarbonate

paid

by the design-

even

in

VX-10.

packs are

assuring

harsh

With

envi-

operation,

prop-

pro-

1-1

Chip

The

diagrams

Component

below

indicate

Information---------

some

of thedis-

tinguishing

features

nents.

Capacifors

Tantalum Capacitors

of

common

chip

compo-

Type

L w H

2125 2.0 1.25
1608 1.6
1005

0.8

1.0 0.5

(Unit:

Type

p

A

L w

1.25

2.0

3.2

1.6

(Unit:

0.35

mm)

~

0.5

0.65 ~ 0.95

0.45

~

0.55

mm)

HI

I

1.2

1.6

~

Resistors

H

T

Indica

ted

Letters

1 2 3 4 5 & 7 : ' 0 •

Type
1/10
1/16
1/165

(Unit:

L w

2.0

1.25

1.6 0.8 0.45

1.0 0.5

mm)

H

0.5

0.35

B 3.4 2.8

5.8 3.2

c

Marking* 100, 222, 473

1147311

I I

I I

Ten

unit
0
1
2

3
4

5

6
7

8

9

One

unit
0
1 10
2 10
3 10
4 10

5 10"

6
7

8

9

Examples:

Multiplier

100=10Q
222=2.2kQ
473=47kQ

1.9

2.3

...

1QO

1

2

3

4

6

10

7

10

8

10

9

10

code

"---'.

•

1-2

VX-10

VHF

Band

Service Manual'-.../

Chip

Component

Information

Replacing Chip Components

-.,

Chip

by

a series
spot
part
and

For single

and

and
solder
(or

exposed

before

In

~

quantities of
ually
tweezers,
streams

components

of

robots. The first

of

adhesive

is

to

be

installed,

place

the

flow the solder.

parts

sided

board

paste

dip

our

by

of

is

is

to ultra-violet light) to

soldering.

laboratories

chip

applying a spot

and

then

hot

air

are

resin

at

and

using

applied,

vacuum

boards,

then

baked

For

and

components

soldering

(without

installed

the

location
later

solder paste is applied

double

but

service

of

physical contact

one

robots

suction.

to

harden
sided

the

board

are

mounted

resin,

by

very

at

the factory

places a

where

handle

the resin

boards,

is

baked

cure

the

shops,

placing

small

small

small

man-

each

no

resin

with

dual

dur-

Precautions for Chip Replacement

0

Do

not

disconnect a chip

foil

pattern

0

Never
all

ly

0 Limit

avoid

Removing

re-use a

removed

to

avoid

soldering
damaging

Chip Components

0 Remove the

time,
cidic fluxes as
pressure,
ning

using

from

and

the

may

chip

mixing

solder

solder

shown
do

chip's

peel off

chip

component.

components

with

time to 3

the

at

each joint,

wick

below.

not

attempt

electrode.

forcefully,

the

board.

new

parts.

seconds

component

one

whetted

Avoid

to

Dispose

immediate-

or

and

joint

with

applying

remove

or

the

of

less to

board.

at

a

nona-

tin-

ing

soldering).

ing

solder
applies
then

breaking

The

is

recommended
replacements.
to

remove

only a tapered,

~'

ing

iron, a set
solder
be

below

We

using a vacuum

a light

special

wick.

steady

the
vacuum/

if

Otherwise,

and

replace

temperature-controlled

of

tweezers

Soldering

280°C (536°F).

remove

vacuum

adhesive

desoldering

you

expect to

chip

iron

parts

it is

by

first

suction

at

with

components

and

temperature

iron,

the iron tip,

tweezers.

equipment

do

a lot

usually

braided

remov-

which

and

of

chip

possible

with
solder­copper

should

0

Grasp

and

gently

(to

break

ly

heating

peeling

Dispose

0 After

and
solder
the

replacement

the

chip

twist

the

each electrode. Be careful to

the

foil traces

of

the

removing

soldering

and

smooth

on

both

the

tweezers

adhesive

chip

when

the

chip,

iron

to

the

part.

~

~

sides

bond)

from

wick

land

while

the

removed.

use

the
away
for installation

with

back

board.

copper

any

tweezers,

and

forth

alternate-

avoid

braid

excess

of

,-,

VX-10 VHF Band Service Manual

1-3

Chip

Component

Information

Installing a Replacement Chip

As

the

value

of

some

chip

components

is

not

'-'

indicated
get

the

0

Apply a small
on
Avoid

bridging

0

Hold
position,
motion
diagram

on

right

one

side
too

the

line as indica

the

body

part

for replacement.

amount

where

much

(shorting

chip

and

below.

the

solder,

to

with

apply

Do

of

the

chip,

be

of

solder

chip

is

to

which

other

tweezers

the soldering

ted

not

parts).

by

the

apply

in

arrow

heat

careful to

to

the

be

installed.

may

the

desired

iron

for

land

cause

with

in

the

more

\_I

a

than

3 seconds.

0 Remove the tweezers

on

the

other

side in the

-.

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

and

solder the elec trode

manner

just described.

"-"

1-4

V.X-10 VHF Band Service

''--"

Manual

'-

Operating Manual Reprint

Controls & Connectors

(Green

on

Busy/Tx

"Busy",

Red

LED

on

"Transmit")

Channel Selector

PTT (Push

-\

To

Talk)

Monitor

Lamp/Lock

Power

FM TRANSCEIVER

00

A B

Switch

Button
Button

Speaker

Switch

V8f(8X

----611

ll

choice

- keypad (installed
your dealer)

Before You Begin

Battery Installation

Refer

rear

to

panel

the

of the VX-10

and

Removal

illustration

and

below

its

battery

showing

pack.

0 Lay the battery pack loosely onto the rear panel

of

the

transceiver,

small

alignment

corresponding insertion slots

and

tabs

carefully

on

the battery

mate

the four

with

on

the transceiv-

their

of 2-or 16-key

the

by

-

0

Guide
ward
ward,

0 To

remove

remove

tery Release
while

battery

the

Antenna

LCD

External

4

6

C) C)

~

6666

Jack

(Liquid

Mic/Earphone

vertex

5_j__B

6 6

L_)

Crystal Display)

Jack

6~

C)

6666

the

pack

into the slots

pressure, then slide the

until it locks in place

the battery,

any

protective cases. Press in
button

sliding

away.

the

turn

(behind the

battery

down

with

battery

with

a "Click".

the

radio

Antenna

Y2''.

a slight in-

pack

up-

off

and

the

Bat-

jack)

Then

lift

~

er

case.

tery

Proper

pack

offset

alignment

about

case.

rear view with battery

pack installed

~

VX-10 VHF Band Service Manual

occurs

%" from

battery pack contact pins

with

the

the bat-

top

of

the

Do

not attempt

&

Low

Battery Indication

0 As

the

age

chargeable
explode

battery

gradually

if accidentally short-circuited.

discharges

becomes lower.
tery voltage reaches
should
should

be

recharged

be installed in its place. The
will blink in the display
is low.

Ni-Cd

6.0

Volts, the
and

when

to

open

packs,

during

another

any of there-

as

they could

use, the volt-

When

battery

the

battery

battery

"~"

voltage

bat-

pack

icon

1-5

Operating Manual

0

Avoid

little use

recharging

between

Ni-Cd batteries

charges, as this can

Reprint----------

often

with

degrade

0

Turn

Channel

the

top

Selector to

panel

'-"

the

charge

you

carry

you

so the operational
until depletion (this "Deep Cycling" promotes
better

capacity. Yaesu

an

extra,

long-term

fully-charged

battery

battery

capacity).

recommends

pack

may

be

utilized

Operation

Before

0 Install a

0 Screw the

0

You

Begin

charged

ceiver, as described previously.

supplied

jack.

Never

an

antenna

If

you

have a Speaker

that

it

not

be connected until

with

the basic

battery

antenna

operate

connected.

operation

this

pack

onto

transceiver

/Mic,

of

we

you

the

onto

the

the

Antenna

without

recommend

are

familiar

VX-10.

that

with

trans-

choose
operating
A
or
will
LCD.

0

Rotate
Selector

signals are being re­ceived,
preset
level
ground
following
dure.
CD

the

channel

channel

appear

the

knob

the

on
noise

Press

ton

the

on

desired

channel.

number

lower,

you

Volume

the left side)

name

on

the

outer

to

set

can

back-

by

the

proce-

Monitor

ring

the

Volume

~·

button

once

(

of

the

Channel

level.

I I

(the

middle

to activate

:..ct"

the

If

..L

but-

"o:J"

no

~

aiL

0

Operating

0 To

turn

push

and
orange
ton for

Ul~

the

VX-10

the

radio

hold

[PWR]

lh

second.

on,

in the

but-

antenna
installation

belt clip
installation

~(«

~~

~

C) C)

icon, then press
ton for one second to
ually.

@

Rotate

able

® Press

slide lever left

to release

ra1ls

activate

0 To transmit, press

Speak

00*

panel
right-hand
in a normal
To
ceive
the

0

If

plugged

a a

C)

transceiver.
to

your

Volume

into

grille

return

mode,

[PTT]

a

Speaker

ear

the

the

Monitor

the

the

(lower

corner)

to

the

release

switch.

into

Hold

in

and

hold

open

Volume

level

Squelch.

microphone

voice.

Re-

and

control

on

button

hold

TX~

RX~

/Mic
its jack

the Receive

is

on

the

speaker

in

the

Monitor

the Squelch

for a

the noise.

once

in

the

area

available,

the

right

grille

mode.

comfort-

again

[PTT]

of

the

\

it

side

To

transmit,

But-

man-

to re-

switch.

front

may

of

up

next

'-"

be

the

1-6

VX-10

VHF

Band

Service

Manual

'-"

Operating Manual Reprint

press

~

·

you

0 Press one of

Two-Key transceiver version,

the

Speaker/Mic's

would

the

16-Key version),

mentarily

on

on

the

main

the

"Soft Keys" ("A"

or

[PTT]

transceiver body.

press

switch, just as

or

or

"A"~

downward

the Channel Selector knob, to ac­tivate one of the "Pre-Programmed Functions"
which
programming

dix" for a listing of available features.

may

have been

by

the Dealer. See

provided

at

the

the

Appendix

A.

Pre-Programmed

.·~

One

or

have

been

of

programming

have

been

the

Two-Channel
through
and/

or

the

ferred to as

more

activated

assigned

"D" keys

Channel

'The

Functions

of

the

following functions

by

your

of

the

radio. The functions will

to

the

transceiver

on

the

Four-Channel version,

Dealer

"A"

version,

at

and

"B" keys in

Selector Knob (hereafter re-

Knob").

"8"

in the

"0"

mo-

time of

"Appen-

may

the

time

the

"A"

on

•

Dual

Watch

Dual

Watch
on a priority
other

channel ("Priority" is assigned to the

channel

small"DW"

when

Dual

To start

automatically checks for activity

channel,

of

the

currently-selected

is displayed

Watch is active.

Dual

Watch operation, press the Deal­er-designated button
momentarily.

About
ceiver will briefly check
looking for
When

Dual

nel,
number
will be displayed.
ter

the

an

incoming call.

a signal is received

Watch

or

name

will

tag

Dual

station

on

the

transmitting.

Dual

To cancel

nated

button

mentarily

Watch, press

(A,

8,

again.

while

(A,

at

8,

the

C,

operating

every 1 Y2

the

Priority

on

the

pause

for

the

Watch will

Priority

the

C,

or

D)

Group). A

top

of

the

or

0)

or

the Knob

seconds,

channel,

Priority chan-

and

the

channel

Priority

channel

resume

channel

Dealer-desig-

or

the

Knob

on

an-

first

LCD

the

stops

mo-

re-

af-

• Scanning

Scanning

<<This

rapidly

section

changere

steps

subject

USR

through

to

SCAN>>

each

assigned channels, looking for incoming calls.

~

If

a call is

channel,

detected,

then

resumes a few seconds after

Scanning

stops

incoming transmission ends.

Two

Scanning

Scan

and

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

play

means
scan list, while
the

Dealer can

To

start

Scanning,

signed

button

cancel Scanning, press

modes

that

the

User can

"DLR SCAN"

edit

the

momentarily

(A,

B,

C,

are

available:

edit
means

scan list.

or

D)

or

the

same

the

that

press

the

Knob. To

button.

of

your

on

that

the

"User"

channel

only

the

as-

•

LOW

Transmit

Pressing the Dealer-designated

the

es
mode,
The "

•

Talk

In

radio's

thus

1

'7'

Around

duplex

1

t icon will

Power

transmitter

allowing

be

button

to a

"Low

greater

battery

illuminated in this case.

switch-

Power"

life.

channel systems (separate receive
transmit frequencies, utilizing a "repeater" sta­tion),
repeater
that
operating
ceive

Talk-Around

station

and

allows

talk

is nearby. This feature

on

"simplex" channels,

and

transmit

frequencies

you

to

directly

has

no

are

bypass
to a station
effect

where

the

there-

same).

and

the

when

·~

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

The VX-10 is capable of

ory

channels

no

limit
group.
Pressing

the Knob allows the
the

available

lected

Channel

•

TX

This feature, if selected, disables
Battery
when a very
nearby
Press the

group

Save Off

into

to

the

number

the

assigned

groups.
may

Selector Knob.

Saver,

station

which

strong

is

assigned

any

of

button

operator

Channels

then

reduces

signal

being

button

separating

nine

of

be

from

received.

(A,

its 102

groups.

channels

(A,

B,

to toggle

within

selected

the

transmit

an

B,

C,

mem-

There

in

C,

or

between

using

Transmit

apparently·

or

0)

is

each

0)

or

the

se-

the

power

or

the

is

pressed

The

receiver

be

opened,

B.

Set Function (Menu)

The user-accessible "Set
operator
tures

Two

are

available:

CD

Access"
Function"

of

If

(A,

@

If

Access" to
ing

(the

squelch

and

to

customize

the

VX-10.

methods

the

Dealer

to

keys,

B,

C,

or

the

Dealer

the

downward

code

you

of

activating

has

one

D)

will activate
has

Channel

on

will

now

be

transmitted).

of

the

other

can

commence

Function"

certain

assigned

of

the

pressing

assigned

the Knob will activate

performance

"Pre-Programmed

Selector Knob, press-

the

"Set

the

assigned

the

"Set

station

talking.

allows

Set

Function

Function

feature.

Function

will

the

fea-

key

the

'._./

·~

Knob
you

power

to

disable

are

operating

is

almost

the

always

• Set Function (Menu)

The

"Set Function" allows

ize

certain

ed.

• Squelch

This

feature

digit

Squelch Call code,
ilarly-equipped
Press

Knob,

Squelch

performance

Call

(16-Key

the

assigned

followed

Call

allows

stations.

code

Transmit

in a location

needed.

the

parameters

Pad

Type Only)

the

user

used

button

by

of

the

the

(A,
three
station

Battery

where

user

to

to

change

to call

B,

C,

or

digits

you

Saver, if

high

custom-

as

need-

the

other

0)

or

of

wish

3-

sim-

the
the

to

Set Function.

Once
procedure
for editing:

0

One

Channel

0

Rotate

the

the

of

the

available
function is
the

[A]

that

function.

the
different
press

the

0 Press the

Channel

tion

mode.

Set

Function

is

used

Set

Function

Selector

found

button

Channel

setting

[8]

button

assigned

Selector

to recall

Knob

16

functions;

(see

to

view

Selector

(or to

to

button

Knob

is active,

the

desired

is

activated,

to

step

once

the

Table below),

the

current

Knob

enable/

save

(A,

to

the

exit

disable it),

B,

the

following

Menu

rotate

through

the

desired

setting

to

select

new

setting.

C,

or

0)

the

Set

item

the

each

push

of

then

or

the

Func-

''._./

a

call.

Three

1-8

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

tones

will

be

heard

after the last key

VX-10 VHF Band Service

Manual

','._./

-Operating

Manual Reprint

Knob/Button

~[A]

~

[8]

[C]

button

button

button

Function
Scanning
Dual

Watch

Low

Transmit

Talk

Around
Channel
Code

Squelch Call

TX

Save Off

Set-Function

Scanning
Dual Watch

Low Transmit

Talk

Around

Channel

Code

Squelch Call

TX

Save Off

Set-Function

(on 16-key version) Scanning

Dual Watch
Low Transmit
Talk

Around
Channel
Code

Squelch Call

TX

Save Off

Set-Function

Group

Group

Group

Power

Power

Power

The table

that

are available for

Set Function

below

outlines

user

List

the

various

editing via the Set Func-

functions

tion (described above).

Display
SOl

SQL Squelch Level Level

S02

LIST Scan

S03

BEEP
S04 BELL
SOS

LITE TX/BUSY LED
S06 LOCK Locks Controls Key, PTT,
S07TAG
S08 GRP
S09

SCAN
S10DW
S11

TXPO Transmitter

S12TA

S13

ENCR Encryption

Display
S14 TEL Telephone

SIS TSAV
S16 DTMF

Description Selections

0*-

*0

= SQL

Mode
Keypad
CTCSS/DCS Bell

Channel
Channel
Scan
Dual

Talk

Description Selections

Memory
Transmit
DTMFCode

Memory

Beeper

Name

Tag

Groups Groups

Mode

Watch

Power

Around

Number

Recall

Battery Saver

Select

Dealer

/User
On/Off
On/Off
On/Off

On/Off

1-9
On/Off
On/Off
High/Low
On/Off
On/Off

Channell
On/Off

Channel

12

open

or

Knob

-10,

1 - 10

Off

[D]

button

·~

Knob

~

VX-10 VHF Band Service

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

(on 16-key version) Scanning

Watch

Dual
Low Transmit

Talk

Around
Channel
Code

Squelch Call

TX

Save Off

Set-Function

Scanning
Dual

Watch
Low Transmit
Talk

Around
Channel
Code

Squelch Call

TX

Save Off

Set-Function

Manual

Group

Group

Power

Power

C.

ARTS (Auto Range Transpond System)

This

system

you

and

another ARTS-equipped station

communication
for

more

than

no

signal

sounds,

and
subsequently
the

other

will

sound,

During
ically
onds
in

transmits

(the interval is

an

attempt

is

designed

two

has

been

II

@

move

station

and

range.

11

If

you

minutes,

received, a ringing

"appears

back

transmits,

8"

will

ARTS operation,

for

about 1 second

programmed

to

"shake

to

inform

move

your

on

into

range,

your

appear.

your

hands"

radio senses

the

radio

with

station.

radio's

you
are

out

LCD.

as

every

by

the

when

within

of

range

that

beeper

If

you

soon

as

beeper

automat-

25

sec-

Dealer)

the

other

1-9

Operating

o.

DTMF

This

ANI

system

System

is a

standard

Manual

ANI

(Automatic

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

not

hear

the

other

Nu-

time

you

receive a call, as

station's

DTMF

your

tones

squelch

the

does

first

not

'-~

meric
grammed,
PTT

E.

ing,

Frequency)

lent

those
in
the

dio's

usual.
three
give

Identification)

by

the

Dealer, to

switch

is

pressed

DTMF Paging System

This

system

using

until

stored

your

transceiver.

caller is

When a "DTMF

squelch,

DTMF

seconds

you

time

allows

transmitted

sequences. Your receiver

it

receives

in

a special

heard,

you

Paging
after
to

respond;

sequence

or

released.

paging
DTMF (Dual Tone, Multi-

DTMF

"DTMF

The

squelch

and

an

Paging"

can

begin

"hangs"

the

received

that

be

sent

whenever

and

selective call-

digits

Code"

then

alert

ringer

call

opens

your

operation

open

carrier

thereafter,

may

remains

that

memory

opens

sounds.

for

drops,

it

resets

be

match

your

about

pro-

the

si-

so

ra-

as

the

to

open
wards,
so

F.

ignators
ognition
Nametags"
dard

0

0

0

until

however,

long

as

Alpha-Numeric

The

Dealer

to

"CHAN

To

enable

Enter

SO?

Push

current
Now
change

the

("TAG").

the

rotate

after

the

you

your

radio's

Cfumnel

may

each

channel, to

of

each

may

be

1"

type

or

disable

Set

Function,

[A]

button

selection.

the

the

setting

tones

will

squelch

Names

program

channel.
activated,

display.

the

and

momentarily

Channel

to

the

are

decoded.

hear

the

DTMF

remains

("Channel

Alpha-Numeric
aid

in
These
in

Channel

select

Selector

desired

Nametags")

the

user's

"Channel

lieu

of

Nametags:

Menu

to

state

the

view

knob

After-

tones

open.

des-

rec-

stan-

item

the

to

(Tags

system.

Each

time
tones;
speaking,
at

remember

the

beginning

as

you

the

transmit,

to

pause a moment

code

is

of

each

you

will

being

sent

on

transmission.

hear

DTMF

before

your signal

You

will

0

On

or

Press

then
tor

knob

Off).

the

[8]

press

downward

momentarily

button

to

save

the

new

setting,

on

the

Channel

to exit the Set Function.

Selec-

~

1-10 VX-10 VHF Band Service

Manual

'-""

Operating Manual Reprint

--

General

-

Frequency

Number
Channel
Battery voltage:
Temperature
Case
Weight

Receiver

Circuit
IFs:
12-dB
Squelch

Selectivity:
Intermodulation:

of

spacing:

size

(WHD):

(approx.):

type:

SINAD

Sensitivity:

range:

channels:

range:

Sensitivity:

Specifications

134 ~ 160, 148 ~ 174
40 (FTT-14)

12.5/25/30

7.2VDC

- 30

oc

57 x

99

gramswith

380

Double-conversion

17.70
< 0.2,uV ,
< 0.25
<

>

MHz & 450kHz

60

dB (12.5

70dB

to +

x 46

,uV

or

102 (FTT-15)

kHz

60

oc

mm

(w/FNB-V47)

FNB-V47,

kHz),<

MHz

antenna,

superheterodyne

70dB (25/30 kHz)

belt clip

Spurious
Image
Channel
AF

Transmitter

Power
Frequency

-,

Modulation
Maximum
FM
Spurious
AF
Microphone

rejection:

rejection:

frequency

output:

output:

stability:

system:

deviation:

Noise(@

distortion(@

1kHz):

emissions:

type:

spread:

1kHz):

>

70dB

>

70dB

26MHz

0.5

W@4

5.0/2.5/1.0/0.1
better
Direct FM

(±2.5

better

>

65
<5%
2-kQ

Q ( ±5% THD)

than

±5

kHz

or)

than

-40 dB

dB

below

condenser

W (Selectable,

ppm

±5kHz

carrier

0.1

W to 5.0 W Adjustable)

Specifications are

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

subject

to change

without

notice.

your

dealer.

-

VX-10 VHF Band Service

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

Manual

Operating

Notes:

Manual

Reprint

'--"'

'-

1-12 VX-10 VHF Band SenJice

Manual

'-'

·~·

Transceiver

Disassembly

...........

,

perform

Case

the knob,

0 Lay

1"-

l '

The VX-10

must

a complete alignment.

be

partially disassembled to

Removal

Before beginning,

and

the

the

transceiver

with

a soft cloth to protect the front case from
marring,
screws (Fig. 1).

then

turn

the

radio

battery

remove the two rear-panel case

pack.

on

a flat surface

off,

remove

covered

0

Grasp
gently remove the internal assembly from the
case
pressure
from the case

the

using

from

transceiver

by

pressing

both

thumbs,

at

an

angle (Fig. 3).

Figure

with

on

it gently

3.

both

then

hands,

with

sliding

then

even

out

0 Remove

by
of

-

using

the

unit

the

your

and

Figure

keypad

unit

fingernails to

lift it free (Fig.

1.

from the front

grasp

both

2).

panel

side

0 Remove

case

This provides access

justments,

mended.

Refer repairs

rized service center.

0 Reassemble the

re-inserting the internal
the
pinched,
circling their frame

by

case,

the

small silicone LED lens from

pressing

further

ensure
and

on

to

unit

their

rest

it from the inside.

to

all user-serviceable ad-

disassembly

your

nearest Yaesu-autho-

in

reverse
unit

rubber

firmly

within

and

transceiver case.

is

order.

and

keypad

gaskets

the

not

ridge

the

recom-

When

into

are

not

en-

Figure

2.

-.

VX-10 VHF Band Service Manual

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

:S3JON

laA!a~suell

AJqmassPS!Q

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

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

------Exploded

View

&

Miscellaneous

Parts

~

Description I

TAPTITE SCREW 2 X 3.3

U9900064
U9900066 I TAPTITE SCREW M

U441
U9900069 I TAPTITE SCREW M2

R7152910B
DOUBLE FACE WINDOW

R3152470
RUBBER CAP (YER)

S6000324
MICRO-TEX

I TAPTITE SCREW

040021 TAPTITE SCREW

R3521540B

VOLUME KNOB

R3152450
LIGHT GUIDE

M2

1.

M2

Ni

X 10

Ni

7 X 3

X 4

Ni

X 9.5 #2

GUIDE I 2

Ni

#1

Qty.

I 1
I 3

2

FTT-15 (selectable)

FTT-14 (selectable)

·-----PANEL

__L----- RUBBER KNOB (POW)

(\
.·••·

CS1516001

ASS'Y

SP NET, PACKING PAD

W/

(

CAP

R3521630

R3521570
RUBBER KNOB (PTT)

CS1475001
SPEAKER ASS'Y
(W/ SPRING CONNECTOR)

(YER),)

,..-.

R7153490
SHEET (WINDOW)

R3152460A

MIC HOLDER RUBBER

UNIT

CNTL

RFUNIT

R3521580

0 RING (REAR CASE)

~

&CAUTION

The

mic

element

and

remove<.:l

install its

protective

Therefore,

cover

unless

necessary.

CD

R3153940
PACKING PAD (POW)

CP5564001
REAR CASE ASS'Y
(W/ SMA CONNECTOR)

from

be
mic

n

•

p

careful

element

must

the

rubber

~l;J

&CAUTION

The

battery

correctly

proper

terminal

and

must

to

allow

seating

sign is recessed,

the

PCB

er

reassembly. Refer to

to

confirm

be

desoldcred

PCB

on

order

cover.

not

to

remove

repl<~cement

p<~cking

p<~J

be

installed

proper

tr;;msceiv-

the

drawing

below

of

the

pad.

tore-

this

is

de-

into

Non-designated parts are available only
as part of a designated assembly.

~

~VX~-·10

..

VH

.. F ..

B•a•n•d•S•e•rv

..

ic•e•A1

..

a•n•u•a•l

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

R6147510
RING NUT

~

A 8

'-....pes

.

1-15

:So:f-DN

~

papo1dx3

Ma!A

snoau-e11aJs!w

stJ-ed

------

g~-~

______________________________________

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

Circuit

Description

Receive Signal

~

,-,

Incoming

ered

to

the

RF

pass

filter

and
L1006, L1007, L1008, L1010, L1011
pacitors
C1049, C1050, C1064, C1076, C1077, C1081
C1082

(RLS135).

Signals

transceiver

(2SC5226-4/5)

pass
L1017,
C1091, C1099, C1100,
C1113, C1158, C1162 & C1166,

C1033, C1034, C1046, C1047, C1048,

and

within

filter

consisting

capacitors

Path

RF

from

Unit

high-pass filter consisting

antenna

are

and

the

antenna

and

passes

switching

the

frequency

then

C1017, C1087, C1089, C1090,

amplified

enter a varactor-tuned

of

coils L 1015, L 1016 &

C1108, C1111,

jack is deliv-

through a low-

diode

range

and

diodes D1012,

of

coils

& L1012, ca-

&

D1008

of

the

by

Ql

019

band-

Cll12,

ic filter CF1001
products,
in

Q1020,

in

the

by

the

(CDBM450C24T).

Detected
of the
band-pass

scription),
the

audio

on

the

optional

the

er.

and

which

450kHz

ceramic

user

selected Key Unit for

power

CNTL

to

is

applied

removes

IF, before

audio

filtering (see the Key Unit

and

then

amplifier

Unit,

headphone

Squelch Control

strip

away

to

the

amplitude

detection

discriminator

from

Q1020 is

past

the

Q2021 (TDA7233D)

providing

jack

unwanted

limiter

de-emphasis

volume

up

or

4-Q

amplifier

variations

of

the

CD1001

applied

Circuit

control

to 0.5

loudspeak-

mixer

speech

to

one

and

De-

Watts

to

to

D1013
by

Q1026 (SGM2016M).

Buffered

by

Q1001 (2SC5226-4/5) to

local
injection
The
through

(17T1285, 7.5

desired

~.

(2SC4215Y).

The

subsystemIC

IF
tains
limiter
amplifier.

& D1014 (all HVU350) before first mixing

output

signal

17.7

the

between

to

the

MHz

monolithic crystal filters XF1001, XF1002

signal,

amplified

second

amplifier,

from

first
first

kHz

BW)

which

first IF signal is

Q1020 (TA31136FN),

mixer,

noise

116.3
mixer
mixer

to

is

then

second
amplifier,

the

VCO

providea

and

156.3

Q1026 (SGM2016M).

product

strip

away

amplified

local oscillator,

is

amplified

pure

MHz

then

all

by

applied

which

and

S-meter

passes

but

Q1028

to FM

first

for

the

con-

The

squelch
plifier &
detector

When

put

of

the

and

band-pass

tion

of Q1020

and

8,

and

The

resulting

passed

no

carrier

and

55

(IMD1

supply
while

(Busy)

OA)

pin

circuitry

band-pass

D1018 (DA221)

no

carrier

detector

then

to

pin

is received, this

of

Q2001

and

voltage

55

makes

half

of

filter

is received,
stage

filtered

and

the

rectified

DC

96

of

the

to

go

Q2020 (UMH3N)

to

the

Q2008 (FMG2) hold the

the

LED off,

consists

within

on

in

by

the noise amplifier sec-

network

by

squelch

microprocessor

signal

low.

Pin

audio

when

of a noise

Q1020,

the

CNTL
noise

Q1020 is

Dl018.

control

43 signals Q2018

amplifier

at

amplified

between

voltage

causes

to

disable

these

am-

and

noise

Unit.

the

out-

pins

Q2001.

pins

Q2021,

green

pins

7

is

If

43

the

are

second

A

erence I second

(2SC2620QB)

to

produce

with

the

The

-

VX-10 VHF Band Service

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

local signal is

the

first IF

second

local

from

the 17.25

450kHz

signal

IF

then

generated

second

within

passes

Manual

oscillator

MHz

crystal

IF

when

Q1020.

through

by

PLL ref-

the

Q

1018

XlOOl

mixed

ceram-

low.

Thus,

the

while

transmission.

When a carrier

audio

no

the

amplifier,

signal

microprocessor

and

silences

is

being

appears

received,

blocks

at

the

output
the

and

discriminator,

from

receiver

during

Circuit

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

noise
96

to

chip

and
DTMF
spectively.
or
or
processor
audio

(TDA7233D) to

supply

Transmit

is

removed

of

Q2001 to

turn

onthe

The

microprocessor

on

the

the

CDCSS

code

If

CDCSS is

code

matches

stops

to

pass

voltage

Signal

Key

squelch

not

not

from

go

busy

Unit,

code

transmitting

activated,

that

scanning,

through

the

to it via Q2018

the

high

and

LED via Q2008.

then

the

for

information,

programmed,

the

loudspeaker

Path

output,

the

checks

DTMF

CTCSS

or

if the received tone

if active,

audio

causing

microprocessor

the
decoder
or

CDCSS

if

enabled,

and

tone

squelch

the

and

amplifier Q2021

by

enabling

and

Q2020.

pin

CTCSS

chip

or

re-

micro­allows

the

the

code
Q2001
CDCSS

If

is

generated

applied

speech
monitoring

The

(25C5231
(25C5231

(25C5226-4/5).

then
amplification

The

antenna

is

genera

and

delivered

modulating.

DTMF is

to

the

audio.

in

modulated

C8/C9)

C8/C9)

applied

transmit

switch

enabled

by

to

ted

by

the

to

D1017

for

transmission,

the

microprocessor

splutter

Also,

the

The

the

up

to 5

signal

D1006 (RL5135)

filter

the

tone

loudspeaker.

signal

and

PA

from

is

buffered

amplifieu

low-level

module

watts

output

then

microprocessor

(HVU202A)

the

Q2001

section

is

transmit

passes

in

place

amplified

the

VCO

by

by

signal

Q1005 for final

power.

through

and

is

low-pass

for

tone

and

for

Q1002

Ql

003

Ql

001

the

'-'

of

is

~

Speech

ered
Q2025-4 (NJM2902V),
user

selected Key

Unit

Key

The

CNTL

Deviation
filters
quency

deviation.

The
CTCSS
Q2001
quency

from
ting frequency.

If

ing

is
nals
the

microphone

If

input

to

the

Circuit

pre-emphasized

UNIT,

Control),

the

speech

components

processed

tone

and

modulating

the

unmodulated

an

external

controlled

the

microprocessor

a CDCSS

from

CNTL

Unit

Description).

to

provide

signal to

generated

delivered

microphone

by

jack

code

Unit,

and

audio

the PLL carrier

Q2022 (UMZ2N),

is

the

microphone

where

then

applied

for

pre-emphasis

audio

IDC

the

splutter

remove

that

might

is

then

by

the

to 01001

carrier

is used, PTT switch-

when

drops.

enabled

is deliv-

itis

amplified

to

one

(see the

then

returns

(Instantaneous

filter

which

any

high

result

mixed

microprocessor

(155314)

at

the

for

in

with

for fre-

up

to±

the

transmit-

which

impedance

transmission,

by

of the

to the

fre-

over-

a

5kHz

sig-

at

filtered to
diation

Automatic Transmit

RF
sampled
D1004
through
and

The

of

three

suppress

before

away

delivery

Power

power

(1

thus

microprocessor

output

by

C1026, C1027

55321

Q1004 (NJM2904V) to

the

power

low

power

).

The

from

output.

levels.

harmonic

to

the

antenna.

Control

the

final

and

resulting

selects

either

Transmit Inhibit

When
PLL
ing
98

of the microprocessor Q2001. While
mit
low,
Controller

NJM2904V)

transmitter
transmitter.

the

chip

DC

unlock

PLL is

which

transmit

Q1015

goes

control

unlocked,

then

turns

Q1014

to

disable

RF

amplifier

PLL is

to

voltage

pin

off the

and

the

unlocked,

a logic low.

47

of

Q1004

supply

Q1005,

Automatic

spurious

amplifier

is

rectified

DC

is fed

the

PA

high

The

is

passed

Q2001

voltage
disabling

ra-

is

by

back

module,

or

one

pin 2 of

result-

to

pin

the

trans-

remains

Power

(UMCSN,

to

the
the

'-._/

1-18

VX-10VHFBandServiceManual

~

Circuit Description

-Spurious

Generation
mitter
frequency
frequency,
VCO.

vided
L1007
C1049
harmonic

antenna.

PLL

,-,. PLL

Q1002 (2SC5231C8/C9)

(2SC5231C8/C9), Q1006 ( 2SC4245);

systemIC

Suppression

of

spurious

is

minimized

being

modulated

Additional

by a low-pass

& L1008

& C1050,

suppression

Frequency

circuitry

Q1015 (MC145192F),

by

equal

harmonic

and

C1033, C1034, C1046, C1048,

resulting

Synthesizer

on

the

products

the

to

the

directly

filter

in

prior

RF

and

fundamental

final

in

suppression

consisting

more

to

Unit

consists of

VCO

by

the

trans-

carrier

transmitting

the

transmit

is

pro-

of

L1006,

than

60

dB of

delivery

buffers Q1003

which

to

VCO

PLL

sub-

contains

the

divided
programmable
the
5kHz

frequency.

Q1015
from

2760) to
reference (respectively).

grammable
that
applied
which
ration
tween

VCO

signal

divider

desired

Meanwhile,

the

The

derived

receive frequency,

or

6.25

kHz

divides

reference oscillator Q1018,

produce

5kHz

to

produces a pulsed

depending

the

the

(or

divider

from

the

phase

input

to be

derivative

the

reference

17.25

the 5 kHz

6.25

kHz)
(derived
the

detector

on

signals.

the

further

section,

so

of

divider

MHz

reference

crystal

(or

signal

from

section

output

phase

divided

depending

as

to

produce

the

current

section

reference

by

3450 (or

6.25

kllz)

from

the

the VCO)

oscillator

of

with

pulse

difference

in

the

upon

a

VCO

of

loop

pro-

and

are

Q1015,

du-

be-

a

reference
programmable
charge

ply
Q1018,
and

frequency

.ween

-

transceiver

ing

Q1003, Q1006

tion
by
the
plied

pump,

Stability is

via Q2014 (2SB1132Q)

temperature

capacitors

While

116.3

frequency.

of

Q1015.

64

or

65,

data

latch section of Q1015, before

to

the

divider,

divider,

and a power

maintained

associated

reference

receiving,

and

156.3

version

according

programmable

The

and

There

and

applied

serial-to-parallel

phase

saver

by a regulated

on

compensating

with

crystal

VCO

VCO

the

X1001.

Q1002

MHz

the

programmed

output

to

VCO

to a control

comparator,

circuit.

the

CNTL

the

oscillates

accordingto

is

buffered

the

prescaler

signal

divider

data

latch,

3 V

sup-

Unit

thermistor

17.25

signal

MHz

receiv-

is

divided

from

being

section

be­the

sec-

ap-

to

by

of

pulse

This

to

the

varactor

level

of
affect
changing
according
signals

reference oscillator.

reference
Q1002,

described

between

The

tion

by

For

el

version

The

remainder

the

VCO

after

transmission,

train is filtered to

01003

the

DC

voltage

reactance in

the

oscillating

to

the

phase

derived

oscillator.

Q1001, is

previously.

134

and

from

is

thus

buffering

and

174 MI-lz

programmed

of the

applied

DC

(HVU350).

applied

the

tank

frequency

difference

the

VCO

phase-locked

The

by

Q1003

the

VCO

according

PLL

circuitry is

to

circuit of the VCO,

and

output

to

the

Q1002

transmit

;md

returned

Changes

the

varactor,

of

the

between

the

to

the

of

the

and

amplifica-

first

mixer,

oscillates

to

the

frequency.

shared

in the

VCO

the

crystal

crystal

VCO

as

mod-

with

Q1015.

The data latch section of Q1015 also receives

serial
Q2001

dividing

on

the

CNTL

data

from

Unit,

the

microprocessor

which

causes

the

pre-

the

receiver.

However,

the microprocessor

cy is

at

the

actual

offset for IFs,

transmit

as

in

the

dividing

is

such that the

frequency

the

receiving

data

from

VCO

frequen-

(rather

case). Also,

-

VX-10 VHF Band Service Manual

-------------------------------------------------------------1-19

than

the