Teac T-X3000 Bedienungsanleitung

TEAC.

kat

SERVICE

MANUAL

T-X3000

AM/FM

Digital

Synthesizer

Tuner

regards

the

resistors

and

capacitors,

refer

the

circuit

diagrams

and

the

PCB

ass'y

drawing

contained

this

manual.

Parts

marked

with"

require

longer

delivery

time.

parts

marked

with

this

sign

are

safety

critical

components.

They

must

always

replaced

with

identical

component-refer

the

TEAC

parts

List

and

ensure

exact

replacement.

boards

shown

viewed

from

parts

side.

Effective:

July,

1991

5704054000

—-FX3000

SPECIFICATIONS

[FM

Section]

(IHF)

Tuning

Cover

Range:

87.5

MHz

108.0

MHz

(100

kHz

steps,

USA/Canada)

87.50

MHz

—

108.00

MHz

(50

kHz

steps,

Europe/UK/Australia/

General

Export)

Usable

Sensitivity

(IHF):

Mono:

13.2

dBf

(Europe/UK),

10.8

dBf

(Others)

Quieting

Sensitivity:

Mono:

19.9

dBf

(Europe/UK),

dBf

(Others)

Stereo:

42-dBf

(Europe/UK),

39.2

dBf

(Others)

Alternate

Channel

Selectivity:

(98

MHz

£400

kHz)

(Europe/UK),

(Others)

Image

Response

Ratio:

(Europe/UK),

(Others)

intermodulation:

(Europe/UK),

(Others)

Frequency

Response:

—

15,000

(+1

dB/-2

dB)

Capture

Ratio:

1.7

(at

MHz)

Distortion

(at

dBf,

MHz):

Mono:

0.2

Sterea:

0.4

Signal-to-Noise

Ratio

(at

dBf,

kHz):

Mono:

dB,

Stereo:

Suppression

Ratio:

Stereo

Separation

kHz):

Output

(Level/impedance):

600

mV/

2.2

kahms

[AM

Section}

Tuning

Cover

Range:

530

—

1710

kHz

(10

kHz

steps,

USA/Canada)

522

—

1611

kHz

steps,

Europe/UK/

Australia/General

Export)

Usable

Sensitivity:

dB/m

(316

V/m,

Loop

Antenna)

Selectivity:

(+9

kHz

999

kHz)

Image

Response

Ratio:

(at

999

kHz)

CHECKS

AND

ADJUSTMENTS

TEST

CONNECTIONS

MPX

Modulator

Dummy

ANT.

47k

LA126

Connect

test

equipment

shown

diagram.

voltmeter

shall

connected

between

test

points

TP-2

and

TP-3

the

Main

PCB--that

is,

the

ends

R213.)

Dummy

Load

Connections

the

Main

PCB

inside

the

tuner

Response

Ratio:

(at

999

kHz)

Distortion:

0.5

(85

dB/m

999

kHz)

Signal-to-Noise-Ratio:

(at

dB/m)

Output

(Level/Impedance):

200

mV/

2.2

kohms

[General]

Power

Requirement:

120

AC,

(USA/Canada)

220

AC,

(Europe)

240

AC,

(UK/Australia)

115/230

AC,

—

(General

Export)

Power

Consumption:

Dimensions

(WxHxD):

435

276:

Weight

(net):

2.9

Accessory:

300/75

ohm

Matching

Trans-

former

(Europe/UK

only),

T-bar

Antenna,

Loop

Antenna,

RCA

plug

Cord,

Owner's

Manual

*}mprovements

may

result

specification

feature

changing

without

notice.

Distortion

Meter

Discrminator

Adjustment

Set

the

tuner

its

position.

Tune

the

tuner

MHz

frequency

and

load

this

into

any

preset

station

memory.

Keep

the

tuner

available

receive

the

frequency

MHz.

Switch

the

Signal

Generator

that

the

tuner

fed

with

this

signal

mono

carrier

MHz,

modulating

frequency

kHz,

modulation

rate

100%

(75

kHz

dev.),

a-level

dBf.

;

‘Adjust

T21

until

the

voltmeter

connected

between

TP-2

and

TP-3

reads

+/-1

mV.

Switch

the

filter

box

select

200-15,000

band

pass

filter

(BPF),

and

check

for

0.6%

THD

less

read

the

distortion

meter.

TUNED

LED

Lighting

Level

Adjustment

The

tuner

shall

tuned

MHz

before.

Switch

the

Signal

Generator

that

the

tuner

fed

with

this

signal

carrier

MHz,

modulating

frequency

kHz,

modulation

rate

100%

(75

kHz

dev.),

level.

Adjust

VR21

until

the

TUNED

indicator

lights.

FX3000

Coil

Adjustment

(only

when

THD

out

specs}

Make

sure

that

the

tuner

set

for

MHz.

Switch

the

MXP

Modulator

that

sends

out

pilot

signal

modulation

rate

(6.75

kHz

dev.)

and

tone

kHz

modulating

frequency

modulation

rate

(68.25

kHz

dev.},

and

that

the

tuner

fed

through

the

Signal

Generator

with

MHz

carrier

dBf

level.

Switch

the

MXP

Modulator

that

its

tone

output

L=-R.

Set

the

tuner

its

AUTO

reception

mode

and

check

for

the

presence

signal

the

tuner's

outputs.

Check

also

that

the

STEREO

indicator

lights

up.

“5.

Switch

the

filter

box

select

200-15,000

BPF,

and

check

for

less

than

0.7

THD

seen

the

distortion

meter.

Note

THD

than

0.7

correct

turning

the

Coil

the

Front

End

PCB

within

the

limits

1/3

turn.

Caution

The

coil

has

correctly

been

adjusted

before

shipped.

Adjustment

the

coil

affects

the

characteristic

other

devises.

not

touch

the

coil

unless

THD

known

worse

than

0.7%.

CAUTION:

Never

touch

these

parts.

(They

are

for

use

the

process

production

only.)

VRIt

MAIN

PCB

Ti2

Tis

Adjustment

points

FX3000

TEST

CONNECTIONS

Loop

ANT.

ANT

Service

Tool

™

Connect

test

equipment

shown

diagram

(DC

voltmeter

shall

connected

between

TP-1

and

GND

the

Main

PCB).

Tracking

Adjustment

Set

the

tuner

its

position.

Load

Band

Edge

Frequencies

(the

lower

frequency

522

580

kHz

and

the

upper

1611

1710

kHz)

into

any

preset

station

memories.

Recall

from

memory

the

lower

frequency

522

kHz

(or

530

kHz),

and

adjust

T12

(oscillator

coil)

for

+/-0.1

seen

the

voltmeter.

Recall

from

memory

the

upper

frequency

1611

kHz

(or

1710

kHz),

and

adjust

TC12

for

V+/-0.2

seen

the

voltmeter.

Asa

result

step

the

adjustment

achieved

step

has

been

upset

;

repeat

step

Connections

the

Main

PCB

inside

the

tuner

47k

Dummy

Load

result

step

the

adjustment

achieved

step

has

been

upset

;

repeat

step

Repeat

steps

and

two

three

times

until

the

voltmeter

reading

settles

down

+/-0.1

for

the

lower

frequency

and

+/-0.2

for

the

upper

frequency.

Sensitivity

Adjustment

Load

into

any

preset

station

memories

these

frequencies

603

kHz

(or

600

kHz},

999

kHz

(or

1000

kHz),

and

1404

kHz

(or

1400

kHz).

Recall

the

AM.

603

kHz

(or

600

kHz)

frequency

from

memory,

and

switch

the

Signal

Generator

that

the

tuner

fed

with

this

signa!

carrier

frequency

603

kHz

(or

600

kHz),

modulating

frequency

400

Hz,

amplitude

modulation

rate

dB/m

antenna

input

level.

Adjust

T11

(Antenna

Coil)

for

maximum

output

voltage

(waveform)

from

the

tuner.

Recall

the

1404

kHz

(or

1400

kHz)

and

set

the

Signal

Generator

that

the

tuner

fed

with

this

signal

carrier

1404

kHz

(or

1400

kHz),

modulating

frequency

400

Hz,

amplitude

modulation

rate

dB/m

antenna

input

level.

Adjust

TC11

for

maximum

output

voltage

(waveform)

from

the

tuner.

Asa

result

step

the

adjustment

achieved

step

has

been

upset

;

repeat

steps

and

Asa

result

step

the

adjustment

achieved

step

has

been

upset

;

repeat

steps

and

Repeat

steps

and

two

three

times

until

both

603

kHz

(or

600

kHz}

and

1404

kHz

(or

1400

kHz)

frequencies

provide

maximum

output

voltage

(waveform)

the

tuner's

outputs.

FX3000

LF.

Adjustment

Recall

the

frequency

999

kHz

(or

1000

kHz)

from

memory,

and

switch

the

Signal

Generator

that

the

tuner

fed

with

this

signal

carrier

999

kHz

(or

1000

kHz),

modulating

frequency

400

Hz,

amplitude

modulation

rate

dB/m

antenna

input

level.

Adjust

T13

for

maximum

output

voltage

(waveform)

from

the

tuner.

TUNED

LED

Lighting

Level

Adjustment

Recall

the

frequency

999

kHz

(or

1000

kHz)

from

memory,

and

switch

the

Signa!

Generator

that

the

tuner

fed

with

this

signal

carrier

999

kHz

(or

1000

kHz),

modulating

frequency

400

Hz,

amplitude

modulation

rate

dB/m

antenna

input

level.

Adjust

VR11

until

the

TUNED

indicator

lights.

CAUTION:

Never

touch

these

parts.

(They

are

for

use

the

process

production

only.)

VRit

MAIN

PCB

T13

Adjustment

points

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EXPLODED

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AND

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