Tandberg TPT-3001 Service manual

TANDBERG'

Programable

Circuit

Alignment

DiagraTs

Instructions

FM Tuner

3001

and

TANDBERG'-

The

European

Alternative

Contents

\

'

i Main
I

Mechanical

Electrical
Power

Oscillatorandfrontend..
Limiter/DetectorbelowserialNo.00T00
Limiter/DetectoraboveserialNo.00T00
Selectivity below
Selectivity
Signaimeter,mutinglevel
Tuningsystem

Tuningsystem2....

Stereodecoder
Integratedcircuits
OtherPCboards
Modifications...
Technicaldata.

service 3

service

circuit

diagram

supply and dial

serial

above serial

1....

pointer

No.

No.

adjustments

00700 . . . . 16

00700

. .

. 8

Page

6
7

.... 10

........ 12

.......

.......2+

........26

.......28

........34

......35

........36

14

. . . 18

....20

.,..32

E

1.0

1.1 Dismantling

Mechanical

service

O Top
O

Top

O Rear

cover,
cover, front

panel

rear (1).

(3).

(2).

N

O Front
O

Bottom

panel (4).

(5).

cover

Remove

rotary

knobs.

Figure

Dismantling

1

the rear

and top coaers

I
t,

-l

i

2

lFisure

t-

i

I

Dismantling

the

front

and

bottom

couers

1.2

Dial

cord

drive

A

I

1/

Figure

1.3

cord

Dial

3

Replacing

driue

battery

in

the

tuning

memory

circuit

il

I

Ordering

No'

376731

memorY

The
intemal

not

is

data
switched

batterv

The

chaised

is

and

receivei

the
Under

will

normal

have

is

batterY

losi

off.

the

is

is switched

life

a

that

10

bY

the

receiver

the

tYPe,

off'

the

Years'

Powered

so

when

NiCd

continuouslY

conditions

of

an

storeo

1'4

when

battery

is

t

V,

Figure

4

The

tuning

circuit

t

battery

1.4 Mounting

:=--

side

\,.,t

panels

and the

19"-rack

mount kit

(25

mm)

-r*f'"'--i

NOTE!

When
must
are

Take
originally
panels
if you
The
without
because
inside

Snril'(J

I

I

I

(16

mm)

B

fitting

use

supplied.

care of

remove the extra

long

the

extra

side

the long

used to

because

screws

the

they will cause damage

receiver.

the

you

must

extra

screws

short

hold

will need them

side

panels you

(A)

which

screws

the

not

panels

(B)

side

side panels.

be used

Figure

5 Mounting

the

side

panels

(extra)

S

$r

Figure

6 Mounting

the 19"-rach

,nount hit (extra)

H

2.0

Electrical

service

Tandberg Programable Tuner
professional
difficult

consequently

and

need an utmost

quality test
In

case of

NEVER TOUCH trimming components
know

For alignment of distortion

generators

the

lower than

the channel separation

and
should be

tuner.

to measure

equipment.

malfunction

for

sure they

1/5

14

Some

with

most

the

accurate alignment

we

need adjustment.

own distortion

TPT

of the

higher

dB

to

20

TPT 3001 is a

of its

specifications

standard

will therefore

3001

test equipment

critical

and channel separation

of

circuits will

demanding

figure should

distortion

equipment

the

that of the

than

TPT 3001.

For

a

follow

in this

'I
I.

2.

J.

4.

5.

6.

7.

8.

complete

procedure in

the

book:

Chapter

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

2.tr

alignment

Procedure

Power
Oscillator
Limiter/detector below
Limiter/detector
Selectivity below
Selectivity above
Signal
Tuning
Tuning

Stereo

we recommend

order as described

same

the

supply and dial pointer

front

and

end

above serial

serial

serial

meter

system
system

and

1

2

Muting

decoder

are

advise

unless

be

figures

you to

serial

No.

00700

No.

00700

level

high

you:

you

No.

No.

00700

00700

Page

10
T2
T4
16
18
20
24
26
30

-\

8

a

For

further

information, contact

our representative.

3

2.1

Main

circuit

Printed

diagram

circuit

with connections.

boards

adjustment,

and

see

pages

20 through

23

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P5:
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v (5.2 v)

5

15.0 V, adjust with

40v

V

25.0

ground

adjust

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terminal.

with R8 1

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90

105 MIJz,

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the

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signal generator

oscilloscope (a.c.-mode)

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center

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frequency

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on the

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to the antenna terminal,

kHz

75

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105 MHz:

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(105

MHz) in

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Ll05

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t

kHz

75

dev.

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the curve

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to the

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will

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l9).

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terminal.

P201

and d istortion

on

the selectivity

the

box

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O

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out

interconnector board

figure

21).

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board,

see

figure

millivoltmeter

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next

21).

the

strap to

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(range

R786

to

ground for

on the main

(see

100

mV)

a second.

to

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30

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98
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31

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in

Normal

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MHz,

98
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oscilloscope

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36 Symmetrical sinewaue

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175

stereo

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75

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input,

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tone.

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generator

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39

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41 Tuning

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TUNING SYST. I

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meter needle.

position
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symmetrical

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!

kHz

75

(a.c.-rnode) to the

Vert. terminal.

to position

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98 MHz and symmetrical sinewave

obtain

of

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to

should

needle.

button.

sinewave

mid-scale

mid-position corresponds

not influence

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increase the

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the

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main

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2.11

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r

Figure 49

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counter.

generator

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mV/75 ohms.

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modulation.

frequency

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the

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to

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terminal.

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in to 98

symmetrical

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to tune

fine-tune for

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98

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selector to

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75

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to

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