JAMO XT-250 User Manual

•

XT·250

Owner's Manual

Electronic Tuning

with· Auto-Reverse Cassette Player

and

40 Channel CB Transceiver.

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(9)

(16)

(1)

On-OH-Volume/Balance Control
To

turn the radio or CB on. turn this control clockwise
until a slight click is felt. Continue lurnlng
volume level. By firsl pushing Inward on Ihls knob while

II

In

turning
balance from the left to the right.

clockwise (to the right) you increase the sound level
the

right speakers while decreasing the left speaker level.

Opposite rotation reverses the effect.

(2)

Bass-Trllble Control

.

This single rear knob performs two separate tonal

adjustments unlike a single tone control. By rotating the
knob clockwise you increase the

eilher direction. you will vary the audio

(15) (14)

By

,b~ss

10

Increase Ihe

turning the knob

tones without

(13)

of

(12)

affecting the treble tones. Once the bass level is set to
your requirements. push inward on the knob while
turning clockwise

Again. adjust this knob for the most pleasing
may find that the setlings used for one type of music are
not acceptable for other types (example: classical

country-western).

(3)

Fader Control
When four speakers are connected to this unit. rotating
the rear knob will vary the sound level between the front
and rear speakers. This knob should be used
tion with the "balance" knob for total four-speaker sound
control.

(1

1)

which will increas'e the treble tones.

(10)

eHect.

In

conjunc-

You

vs

i I

(4)

Squelch Control
This knob
incoming
"break-through"

listened
be

received (Including background carrier noise

Is

to

be

used

to

determine how strong

CB

transmission must

be

to

automatically

the radio or tape program being

to.

At

low squelch settings almost all signals will

occasions). Higher settings require a stronger Incoming

to

signal
necessary
control has

break through. Some experimentation will

to

find a suitable compromise. The squelch

no

effect on outgoing

CB

transmissions.
Rotating' the control lully counter-ckockwise
"click"

Is

felt will completely turn

011

the

CB

and

display.

(5)

'PA

Selector

The built-In

loudspeaker paging amplifier. First,
horn type speaker must
the rear of the unit.
releasing the

the

PA

CB

mode.

amplilier of this unit can also

be

connected

Once this

PA

button on the unit will set the amplifier

By

depressing the talk switch

Is

done, depressing and

an
to

the

be

external

"PA"

on
held microphone and speaking Into the microphone,
your voice will be amplified and broadcast out the

speaker. Whenever the unit is in the

ch,lnnel display will
depress and release the

AlF

(AM-FM) Selector .

The selection

band

Is

of

made by depressing this button then releasing

The selected band will

Illuminating a dot next

LI

D (Local-Distant·) Selector ,

be

blank. To end

PA

button.

either the AM radio band or the

be

displayed on the

to

the

AM

PA

mode, the

PA

operation, re-

LED

or FM markings.

This control functions In radio and"'CB operation. In

an

on
be

unlll a
the

CB

used

as

PA

or

jack on

to

the hand-

PA
CB

FM

radio

panel by

a

It.

essence,
and
can be received. When the bullon
It

will

next to the

.

"Distant"
achieved. The setting of this
automatic
ing the amount of radio stations the system will

It

reduces the reception capability of the radio

CB In the "Local" mode

be

indicated by Illuminating a dot on

"LO"

symbol. Whenever the

so

mode, maximum reception capability Is

bullon

"Seek" tuning operation by limiting

that only strong signals

Is In the

"local"

the

switch

will also

mode,

LED"panel

Is In

effect

or

Increas-

"seek"

in radio mode.

IT

(Frequency-Time) Selector

F
In

normal use, the

Should you want

LED

panel will display the time of day.

to

see the radio Irequency displayed
depress and release this button. The radio frequency will
appear

for

approximately eight seconds then return

time display, The bulton can also be used to change the

10

radio frequency display back

tq

not want

wall for the eight second delay.

time display should you

The radio frequency will also be displayed temporarily

using any of the radio function controls (Up-Down

while
Tuning;

Seek; Station Pre-Set; F I A SelecUon and LID
Selection). Approximatley eight seconds after the control
is last used, the frequency display will change
tim.e

display.

ME

(Memory Enable) Pushbutton

This button

Is

used for several functions. See "Setting the

back

Clock" and "Stallon Preset Selectors".

the

the

10

I I

10

! I

·

(6)

C tt

asse e Eject

Once

II

cassette
elect the cassette
cassette' will
removed from the tape
unit with the power off.
unit automatically reverts

(7)

Auto-Reverse Casselle Opening

The casselle mechanism

automatically retracts when a casselle
"load"

the cassette, verify the open tape side of the

cartridge

Into the opening until resistance

is

facing

Is

playing, you can stop the playing and

by

firmly depressing this button. The

be

partly released and can

sial

Do

not leave a casselle In the

Once the casselle

to

radio operation.

is

protected by a door that

to

the right and slowly guide the tape

Is

feit, A firm push on the

Is

ejected, the

Is

Inserted. To

tape will activate the loading mechanlsin and the tape will
be

drawn into the unit and begin playing. Play will

continue until you eject the cassette.

Once the end of the

tape is reached, the system reverses automatically and

begins to play the other
keep repealing until the casselle

(8)

Cas$elle Rewind-Fast Forward and Program Selector

side of the tape. This cycle will

is

ejected.

The two indicated buttons perform three separate

tions. Depressing the "REW" button will rewind the tape
at rapid speed until the

Depressing the

"FF" button will advance the tape at rapid

speed until the

"REW"

"FF"

button

but~on

Is

lightly pressed.

is lightly pressed,

Depressing both buttons at the same time will change

tape sides (if side 1 is being played it will change

2).

Since this

mec;hanlsm, you will find the function's

"FF"

buttons are always the same no matter which side of

the cassette is being played.

unit

has a special !oglc controlied

ef the "REW" and

Addltion~IIY,

be

easily

func-

to

side

located just

above the

"Seek" button you will find two illuminated
arrows which show which direction the tape is moving in
at

a glance.

(9)

Electronic Seek Tuning
The

next available radio broadcast station can

located when listening

releasing this button. The

to

one stalion

"seek"

by

butlonwill

be

depressing and

matically seek the next higher station and stop. The
setting of the Local-Distant switch will greatly affect the

01

use
function
station

this bullon.

willskip

broadCast. In the "DISTANT" mode,
the very first station it comes
almost out of range. The seek mode

stopped when
manually

(10) Stalion Preset Selectors .

by

re-depressing the button.

In

the "LOCAL" mode, the seek

over weak stations until

to

even if it

It

finds a station or

It

finds a strong

It

will stop at

Is

is

automaticatlY

you

can cancel it

weak and

Six soft-touch pushbutton' selectors have been provided
to

enable you \0 memorize up

stations

these seiectors, refer
a.
b.

(6

AM

stalions and 6

to

the following:

Turn on radio, Select either

Select the first radio station

!lither the "Up-Down" tuning selectors or the

using

to

twelve different radio

FM

stations). To program

AM

or

FM

band,

to

be

programmed by

"Seek" tuning.

c.

Depress the
illuminate near the ME marking

"ME"

button and you will see

on

the displayfor

8 seconds.

d.

You must depress the first
within the 8 seconds, At this time the

of

the six memory pre-sels

LED

will go out

quiCkly

auto-

an

LED

I I

· and the lirst radio station
pre-set button.

e.

Repeat

change

buttons for six additional stations on the other band.

b,

c and d for

to

the

other band and re-program

is

plOgrallll1led

the

remaining five pre-sets then

(11) Radio & Function Display Panel

This

LED

panel provides a visual display of all radio
functions. First it shows which radio frequency
selected
ly

by

you know which band is selected (the AM also functions

with
indicates a

Indicates

Selector). Other
Memory Enable button
panel will indicate
quency

(12)

CB
When
indicate which
selec.ted,

blank.

SRF

(13)

In
illuminate
LED's will Indicate relative modulation level,

by

displaying the numerical frequency. Second-

illuminating a small dot near the AM or FM marking
PM

for time display). Additionally, the

"Stereo" broadcast while

the

"Local" mode

indications Include

is

not displayed.

Channel DIsplay

In

CB

operation, this display will illuminate and

of

the

If

"PA" mode

is

selected (see Local-Dlstllnt

Is

selected. Finally, the display

the

Time whenever the radio fre-

40 available CB channels has been

Is

selected, the display will

"ST"

tti~

"LO" marking

"ME"

ITX Meter , '

the transmit mode of

to

verify signal transmission while the

CB

operatio'n, the "TX"

...

on

tile lirst

the

six

marking

to show the

.I

LED

will

SRF

In

the

Is

be'

receive mode, the LED's indicate sequentially the
strength

Electronic Radio

(14)

To select a radio station, depress either the upward or
downward pointing arrow after

display panel, A quick depress and release will
(or decrease) the frequency one step while holding the

button in will rapidly advance the digits. Nota: AM radio
stations advance
etc.)

lor radio broadcast stations.
in

same reason, Nole: For
advertise their call sign
WWDH

104,0

a problem
on an even digit frequency.
stations' call frequency, you
or 1 04,1. They have :'rounded Itout"

purposes only. This was not a problem
radios
h<ld
rock It back and forth

electronic tuners are
the exact true frequency. Fortunately, most radio stations
realize the confusion they are causing and have begun

broadcasting their

01

the

incoming signal.

Station Tuning Selectors

observing.. the radio

In

10

KHz

steps

(530

...

540

as

this

is

the mandatory spacing required

FM

radio stations advance

.2

MHz steps (103.5

104

FM)

FM.

Only 103,9 or 104.1 can be selected. This

of

the radio since no

only

had a radio dlat with a moving pOlnter,AII you

to

do was move the pointer near "104" on the dlat and

...

103,7

...

103.9

..

simplfcity, some

as

an

even number (example:

and you will find you cannol tune to

FM

If you listen for

wUJ.flnd

to

"find"

far

more precise and willloC<lte only

"true" frequency.

FM

station can broadcast

It will

be,

to

104 for advertising

In

the past when

the station. 'Today's

Increase

...

550

by

the

FCC

'.

etc.) for the

sta'tions will

Is

th,e

"true"

either 1 03,9

...

not

IIII

,

,I

!'

"

I

''''III

I"~"~!

,

i i

•

1'1

,'(15) Electronic

Thetwosoll-touch
ct,annel selection.
channel

channel you want

CB

Channel Setectors

bullons allow quick and accurate

to

Is

displayed on the

Is
wllh the upward pointing arrow.
a lower number. depress
Each lime the selected bullon
released. the channels
bullon

Is

depressed and held In, Ihe channels will

advance rapidly

(16)

Microphone Jack

To connect the

socket using care

CB

to

Seltlng the Clock

The clock can be set

1.

Turn

unit

on and depress

lime.

(if lrequency

2.

Depress and hold In the

3.

Keeping the

"ME"
Radio Up tuning button
Down bullon
and

"PM"

4.

Advancing the minutes past "59"

10

Indicators:

advance the hours.

use

the

bullons first observe which
CB

Channel Display. If

a higher number; press the button

If the desired channel

the

downward pointing arrow.

Is

briefly depressed and

will advance one digit. If

microphone, Insert plug into this

align the keyway and lighten the

by

the following method;

FIT

Is

displayed).

"ME"

bullon

bullon.

to

display the

nut.

bullon depressed, depress the

to

adv,lOce minutes and

advance hours. Also note Ihe

to

"00" does not

"AM"

CS
the

is

the

the

Addllional Operation

1.

CS

Microphone

Notes

-To

talk Into the microphonll, hold It

about61nches from your mouth and speak clearly

you

to

normal voice level. For
depress

switch

on

the

the

while you speak. Release it

transmit, you must

side of the mic'Pphone

In

o,rder

to hear the're

sponse.

2.

CB

Anlenna -Never allemptto use the

proper

on lhe rear
connecled

CS

antenna connected

of

the

unit. A standard radio antenna

to

the radio's antenna

able. Consult wllh your deafer for

to

the CB antenna jack

the

jack

Is

best type

CB

withoul a

not accept-

of
Trl-Band antenna for your vehicle.
Cold &

3.
cold.

abla

Heal-

Never use the casselte mode In extreme

Allow unit and casselle to warm up to a comfort-

level lirst. Avoid exposing casselles to extreme

heat or direct sunlight.

4.

Casselles - Defective, broken, warped or otherwise

damaged

minute) tapes should nol

cass~\le

caSselles must never

be

be

used

player. Use 0-30, C-60'or

used.

0-120

In

any automotive

0-90

only. Also see

cold and heat warning. '

.

In

a

CB or

(120

II

Made

In

Korea

Audiovox Corp., Hauppauage.

N.Y.

11788

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