Standard Horizon HX400 User manual

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

SERVICE

MANUAL

LFB00089134

0001

LFB00089134/1

CONTENTS

TH:~OR¥

OP~RAT~O~

........

41.1

41.2

4,1.3

4,114

41~:i

411~

4,1

The

Rese~

C~-cu~t

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

Extemm

sgna~

connections

and

fnterf~a:~ng

PT"[

and

Fro~

Par)e!

B,ut~o~

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

c~a~~b~et

C}rcu~t

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

Secondary

[}~g:~la~

A~na~ogue

coavmser

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

4,2

Lo~

~::ilter.

4,2.2

Th~:~

Trans~fl~

VCO

4,.2.3

~he

~ce~w

VCO

4,24

The

Trarmmib’Rece~e

VCQ

z;,.~

VCO

Buff:er

.Am~lifi:ers

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

4.3,

R~[.

;EwEA

SECRON

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

A~~te~’~

L~>,~

>aSS

~}~ter

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

4.3,5

Second

Fil~er

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

4.3

MrX~:~;~

C#cu.~t

~}{sl

!~~

Rmp

Second

Circ:u~it

~Oemodula~or

Second

}[~

F:~ter

4.3.10

bt~te

(~Jr,;~#~

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

4~3~11

Audio

Proces:~r

Circuit

4=&12

Sc~a.mb~ed

4.3,13

Mu~e

~nd

442

Trs~nsm:~

4.4.3

Tr~nsm£

Au~fio

~x)oess~n9

Circu~

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

4,4.4

~ra~’~s:rY~

4,4.5.

VCO

cbcu~

44.6

Lo~v

Po~er

4,~6.1

Bstteq,~

¢on~ec.t~:ons

and

Protect~o~

Pag÷

2of

LFB00089134

0002

LFB00089134/2

5.,

~ISASSE.~SLY

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

~..3.

M(]VI

I;;.

~3K3;~©

~SPI..~sY

BO,o%;R

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

1~5

HX420

VHF

R/{o:lo

PAr~

L~s’r

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

72.

4XSS0

UHF

RADIO

PA£rS

~.,~;t

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

72,1

Audio£Xsp~a~

Board

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

?.2.2

Mahs

Board

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

~r~r~

~oohma~

aot

d~e~e&

PARTS

9,1

HX420

V~4F

RADIO

~iCU~T

Db~s£S~A~’~

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

HX480

UHF

I"<,/,@~O

CiRCUFr

[)~AGRAM

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

10.1

ItX420

VHF

RAOIO

COMPO~N¢:NT

IL,~YO~J:TS

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

10,

HX420

VH;F

Control

rSi

Top

~ts

Compone~1~

¢oul

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

H£4,20

VH~::

Cont~’o/Board~

Botto~l

PaRs

!0,t,3

HX4,20

VHF

Board

Top

Parts

Cosspdnent

10,

~qX420

VH~

Board

Bottom

Par~s

Com#o~e~t

Layou~

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

:,!7

10.2.1

Hx480

UHF

Oon~ro~

:Board

Too

Pa~ts

CamE~onsnt

LaTout

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

2~3,

HX480

UH:F

Board

Top

Psr~s

C0ntDonen~

f0.2A

HX42~0

[..~H~F

Board

Bo~o~}

Pads

Coms~nent

FIGURES

F~gL~re

4,24

Syntt~es~zer

B!gc,

Diagram

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

F~gure

4~3..I

Rece~ve~

B~ock

D~agram

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

F~gu.re

4,4-~

Tra~sm~te~

B~ock

Di~sgram

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

LFB00089134

0003

LFB00089134/3

lhe

ENTBL

HX400

series

PMR

haadh@d

twa~way

VHF.iLJ~NF

~ransceival.

Ultra

camsact

s~ze

and

deanna,

:~s

made

o~a

heew

du~.

commercial

canstr(4c~ed

with

m~c~’ep~{scesso~

con~relled

temperatu~-e

compensal:ed

Pha

LocKed

Loop(PLL}

croquette},

s~nt~es~zet

Th~s

#me~

the

capabllbCy

256

progra;mmable

channels.

CTCSS

DCS

Most

t:be

receP~m9

pa~s

are

swi~cbed

off

ee-riod~ca~y

p~’war

save

node

red~ce

ba~e9

carre~t

d~ak~

dudng

slandby.

The

t~ansce~ve~

includes

¢he

fo4158wM9

p~og

~ammab~e

2/5

tone

sel~ca~

Lo:ne

WL~rke.r

Stun

sad

Unsttm

Feature

B.u~!

b4n

Scrar

~b~ef

M~ssed

call

faci~tV

Emer~eacy

Call

feature

VOX

[~o-lce

operated

transmit

with

auto

easy~to-read

LCD

The

batte~

uses

L:lth~um-~on

te,ohno~ogy,,

which

g~ves

~sour

d{.£y

Oyc~e

The

Ba~e~

system

slse

has

batteH

leve~

me%ajar,

low

baUScH

wara~ng

~b~eep.

The

t~ansCeive~"

aiso

~as=

e×tensive

range

accessories;

2:1,

!~e

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

m°P~:

°~e!

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

?~’~T’T"

~T":

’i=~:~=’=!

,..

~:{~2~!.!

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

......

Radie

~:,

HT420

(VHF)Or

Antenn~

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

!~O0mAh

~0n

ba~ter~

~.~Hng

Leaded

Rear

Cii~,

LFB00089134

0004

LFB00089134/4

The

blX40O

.Series

suppoded

wide

raoge

of’

~seful’

access,er~es

For

,up

date

~st

visit

our

web

site

at’.

www,enleLco.,uk

LFB00089134

0005

LFB00089134/5

describe

the

circuit

®pe.~’atio~

,el

~he

~adie;

tae

desc~iptiel~

!~a.s

been

The

Sy~hesizer

section

The

~eceiver

section.

~he

ma~n

rn~croprocesss.ro

has

seve~el

a:r~eilla@’

eompo,nea~s,

which

assist

operation.

Th÷y

ate

~esc=.ribed

the

following..}

sec~}ons.

t’his

(U805)

holds

(he

remai~sing

pa4

,~he

soRwa~’~s

for

the

Mio~oprecessor.

The

ROM

communicates

w~tls

the

Micro~’ocesso~

~sir~9

4.!~2.

The

L~D

Drive

Three

L.[ID’s

are

driven

the

dig~ta

outputs

from

the

Mic:roprecesso~

One

drives

the

Red

EE©,

one

ddves

the

Green~

LeD

and

o~se

drwes

the

b~:~c~k~i!~ht

[.,.ED’s

conr~ected

The

cro<>roces~.or

requires

reset

¢ircu.it

for

correct

~ower

operatio~

’RI~s

~rovided

LFB00089134

0006

LFB00089134/6

The

PTT

button

(8W608.)is

iqterfasoed

to,Be

Microprocessor

di~’ectl~,

via

U801

80,

A!!

o~ber

buttons

ose:nste

~h~ough

resistance

vakse

aath

switchers9

systam.

Th~s

ope~’ates

b~,

measu:nng

the

vo~t;~ge

po~a~

whe~e

the

volb~ge

eeper~dant

which

switch

~sct~va~(ed,

Th~

~de~t~fies

which

the

various

sw~tches

are

achvated

qh~

sw~ch.es

are

8W801

8W8.07

:n~c:~us~ve.

an:d

8W80~

LFB00089134

0007

LFB00089134/7

The

s~nttses~.ze¢

spe~a{®s

ims.lementi~sg

tae

p[~Ise

swallowing

reel:had,

using

the,

btoc~k

diagram

~iv÷n

i,n

:gure

4;2,q

below.

mod:t~lat~os

the

Refe~-ence

Osc~a~gi-’

(TCXO},

"Cb~s

permits

modulation

requwe

extreme

low

frequency

medL~at~on

the

VOO

The

I,oop

fi~ter

takes

ihe

variabie

p#!Se

w:idth

ou~pu¢

from

the

Phase

Page8

LFBO0089134

0008

LFB00089134/8

The

tfansmi~

VCO

w~tn

c~mpone~l(s

art}uF~d

Q405

[ak.es

~t]~e

~oop

:Nter

output

the

~s~ain

#equenc~

cont~ol

~n~ut,

but

aBo

has

b~7o

other

frequenc~

con~rc

~~od[s

These

are

~he

Speech

(MOD

AU~3~O)~nPuL

arid

the

MOD

TONE

a~alo

}npuL

These

tater

~np8~s

con¢re:

the

freqLae~soy

the

VCO

c~’~amg~g

the,

voRage

across

common

vat,cap

~Siode

D403

The

ma~n

~reqqe~cy

aput

controls

the

frequency

the

VCO

changu:ng

the

voltage

across

vancap

d’4odes

D404

~nd

[3405

The

MO©...oTONE

signal

also

conr~ected

}he

Reference.

Osciita£or

(TCXO}~

provide

the

c~oss

point

modu~a~o~

capability.

Refe~

~o=

the

l:rsns~’~~it

Sect@~

~or

fl.idher

deta~ils.

The

Receh~e

VCO

The

rececve

VCO

takes

the

same

=.ooo

~}.ter

output,

.....

the

ors:y,

frequ~ncy.

contro

in~u~

a~d

cor~trols

Ihe

~req~ency

t~.e

VCO

cna~~g~g

th~

Voltage

across

var~ca~

@ode

:netwOrR

O48!.

an~8

D402

~he

,7CO

operates

u~s~ag

t~ans~:stor

Q4O

The

TransmWRecei~ve

VCO

3~er

Swi~chin9

CirC[,.~@l

sets

oower

the

Transmit

VCO

dudr~g

Transmit

an~

the

Rec~ve

VCO

durir~g

rece~v~.

The

ir@~l-~

th~s

ci~rcwt

the

TX/RX

IoMc

contR)~

~l~i~e.

Th~s

~(~g~c

s~al

swKches

Q406

~rov~d@

power

ether

~he

VCO’s

s~o~nd

Q402

asd

Q4O&

LFB00089134

0009

LFB00089134/9

F~g~8

4,3-1

Receiver

Block

D.iag~am

4.S.1.

A~te~na

}Low

pass

Receiyed

si!~na{s

fr:o~’

pass

t£w.ough

[he

co~snector

(CON201}

a~d

are

passed

the

an{e~na

switching

c~rcu~

4.3..2o

Ar~;e#~a

Tra~smidReceive

switc~i#~

c~x;~it,

Th~s

Transm~b’Rece#/e

sw~tc~:

co¢-~tro~ed

~he

TXEN_SV

s~9na~

recerwng

d~Od,e

D202

D205.

are

~umed

off.

which

isolates

the

antenna

from

the~ra~smcter

c~-c~J

"’

.......

sw:~ched

wh~c~

gro~)ds

ou~

the

Rec@ve

:}r~ou~,

.a~d

connects

t’n:e

F~rst

R~F

F:llter

r~ext

stage

the

first

~itt:~r.

which

has

pass

ba~d

co~’~t~x~lled

.b~

~he

the

RDAC

~igna

:l"h~s

fiatet

al.~o

~a~

s@na~

~s~er

L~S~ng

Dt03

The

~qex[

:stage

the

first

R~~

,Amotifier

based

aroused

QI01_

The

©C

~,ower

for

i:h~s

stag¢~

~=.s

~’ovided

from

RX....SV

Page

0~8~

4’1

LFB00089134

0010

LFB00089134/10

Other manuals for HX400

Other Standard Horizon Transceiver manuals

Standard Horizon

Standard Horizon ECLIPSE DSC+ GX1200E User manual

Standard Horizon

Standard Horizon SPECTRUM + GX2355S User manual

Standard Horizon

Standard Horizon HX851 User manual

Standard Horizon

Standard Horizon MATRIX AIS/GPS GX2200E User manual

Standard Horizon

Standard Horizon MATRIX GX3000S User manual

Standard Horizon

Standard Horizon HX380 User manual

Standard Horizon

Standard Horizon Matrix GX2000 User manual

Standard Horizon

Standard Horizon ECLIPSE + GX1250SA User manual

Standard Horizon

Standard Horizon Quest-X GX1500S User manual

Standard Horizon

Standard Horizon HX600S User manual

Standard Horizon

Standard Horizon Explorer GPS GX1700 User manual

Standard Horizon

Standard Horizon HX370S User manual

Standard Horizon

Standard Horizon HX300 User manual

Standard Horizon

Standard Horizon HX300 User manual

Standard Horizon

Standard Horizon HX270S User manual

Standard Horizon

Standard Horizon HX600S User manual

Standard Horizon

Standard Horizon Eclipse DSC+ GX1100S User manual

Standard Horizon

Standard Horizon Matrix GX3000E User manual

Standard Horizon

Standard Horizon HX890E User manual

Standard Horizon

Standard Horizon HX851 User manual

Standard Horizon

Standard Horizon HX751 User manual

Standard Horizon

Standard Horizon 30063X30 User manual

Standard Horizon

Standard Horizon MATRIX GX2100 User manual

Standard Horizon

Standard Horizon ECLIPSE + GX1250SA User manual

Popular Transceiver manuals by other brands

Yaesu

Yaesu FT-7B manual

Kenwood

Kenwood ProTalk TK-3201 instruction manual

Texas Instruments

Texas Instruments TLK10232 user guide

Mizuho

Mizuho MX-2 Operating & assembly instruction

Kenwood

Kenwood TK-3180 Manuale di istruzioni

Blitz

Blitz MJ-398U instruction manual

Utilicom

Utilicom LongRanger 2050 Operator's manual

Standart

Standart HX290UKA Service manual

Altronix

Altronix Pace1PTM installation guide

Kirisun

Kirisun PT2208 instruction manual

ELECRAFT

ELECRAFT KX2 manual

Zodiac

Zodiac K3 user manual

Assa Abloy

Assa Abloy SecureComm HKC GSM-WIFI U manual

Kenwood

Kenwood TK-2217 Service manual

Siemens

Siemens PSO 4000 Quick reference guide

Kenwood

Kenwood TS-590SG instruction manual

Midland

Midland G8E-BT Instruction guide

ComNav

ComNav Mariner X2 installation manual