Tandberg Model12 SERVICE MANUAL

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r=-r=f-rr5r/

Service

manual

MNDBERG

Tape

modell

recorder

12

Preface

This service manual covers

models

der
fully
playback
separate record and

power

rate
output

The model

model I

12-2 and
system and
We hope thot

will find

l2-4 and 12-2.fhe model

transistorised, three

unit

with

amplifiers

amplifiers are rated

-2

is the two-track

12

2-4 is the four-track version. The

)2-4

have exaclly

operating controls.

everyone concerned

this service manual

speed stereo,

two

heads. lt is equipped

playback preamplif

for

the

Tandberg tape recor-

series l2 is a

record

and

iers
each channel. The
for l0

the same mechanical

useful.

each.

watts

version while the

with our

products

April

arrd

with

sepa-

power

models

1967

1

1

T'r

Contents

)

)

'l

,1

.t

t{

tI

tt

tope 34

. -

..

models

..

L2 '.

. .. ' 40

. . . . .

..

c/s

3t
3l
32
32
33

a?

33

33
33
33
34

34
35

JJ

JJ
AE

32
35

a5

35
35

36

36

35
36
36
36
36
35
36

36

1A

37

38

2a

Jd

39

39

39

41
4l
4l

4l
46

Technicol specificqlion,

1.0

l2-4 ond l2-2

The function

2.O

The

3.0

The mechonism, detoiled

4.O

instruciion

The operoling

1.1

4.I.1

1.1.2 lhe

4.1.3

4.1.4

4.1.5

The

4.2

^
r

4.2.1

4.2.2

4.2.3

of the

ond outpuf

inpuf

lever

moior

The

eccentric
pressure wheel ossembly

The
The tope broke
The

trip bor

turnfoble

ossemblies

lhe

supply turnfoble ossembly
lhe lope iight
The

toke-up turntoble

A.2.4 Horizontsl

1.3 Clulch

4.4

4.5

4.6 The lifting

1.7

1.9

O

4.9 The momenlqry stort-stop

4.10 The

4.l l The oulomotic

4.12

4.13

5.0

i

t

t

T

olignments

Generol

4.3.1

4.3.2 Fost

4.3.3 Fost

4.3.4 Normql forword

4.3.5 Neutrol

4.3.6 Free

fhe motor

4.4.1

The

The

4.7,1

The

The revolulion counler

Assembling the fop

The
instruction

5.1.1
5,'I .2

5.1.3

5.1.4

5.1.5

5.1.6

5.1,7

5.1.8

5.1.9
5,l.l0The

5.l,ll

rewind

wind

pulley

Threoding of

lronsfer

speed

mechonism .....

flywheel

speed

pressure pqd . .

electronic

with ihe copston

The broke

chonge mechonism

circuits,

lnpuls

The

record

The FM multiplex-filter

The equolizing
The equolizing
The equolizing

power

lhe

The ploybock
The record level

oscillotor,

The power

Tondberg

.

conlrols

lerminols

descripiion ond

.

.

switch

segment

lension .

ond veriicql

drive

the rubber drive

wheel

the flywheel

for

.

end sfop switch

.

cover

detoiled descriplion

pre-omplif

omplifier in
omplifier
omplifier in

oulput omplifier

pre-omplifier

indicotor

bios ond erose

supply

tope recorder

ossembly

olignments of

. .

.

. .

feoture

.

ier

record

ploybock position

in

omplifier

circuit ..

belt

circuit

models

odiusiment

the furntobles

. '.... '..

odiusfmenl

ond

posiiion . '... '

. .. . 26

posilion . .. . 27

't0
l0

12
t2

t2

IJ

l3

t4
l5

'15
't5

l6
l6
17

t7
l8

't8
l8

l8

19

20
21

2l
22

22
22
22

24
24
25

25

25

28
29
29
29
30

The f unclion selecior

5.2.1
lhe speoker selector

5.2.2

5.2.3 Monourol

5.2.4 Mixing

5.2.5 Stereo

e

9
9

5.2.5 Monourol
Stereo

5.2.7

5.2.8 Stereo

5.2.9 Add o
S.2,l0Sound

Heod

5.3

5.4

5.5

5.6

5.7

olignment

The

5.3.I

The model l2-2

5.3.2

Heod olignment

5.4.1 Demognetizing
The odlustoble

5.4.2
The record/ploybock

5.4.3

5.4.4 The erose

Trock

conlrol,

The

5.5,1
The erose

5.5.2

Trock conlrol,

The

5.6.1

The record/ploybock

5.6.2

Electrical

ond

12-4

5.7.1 Adiustment of

Adiusfment of the

5.7.2

5.7.3 The

Adiustment of the

5.7.4
Control

5.7.5

5.7.6 The boss

5.7.7 The ireble
,Adiusfment of

5.7.8

beqm indicotor

The electronic

5.7.9

5.7. r 0

.t I

5.7

5.7.12

5.7.13
4

5.7.1

5.7.15

5.7.16

5.7.17

5.7.18

5.7.19

Electricol

5.8
model

Modificolions

5,9

Modificofions

5.10
Ports list

6.0

6.0.1

Mechonicol

6.0.2 Elecrricol

recording

during

recording

ploybock, chonnel

ploybock

omplifier

irock .

on sound

ond frock

l2-4 and 12-2

Models

without Tqndberg

heod

model

record/ploybock

heqd

model

heod

erose

qdiustments

12-2

quiescent currenl

of

lhe frequency

conlrol

control

The

record
Adivstment
Dislortion

odiustment of lhe

Bolonce

Adiusiment of

of the recording

Control

of the

Control

of

Control

oulpul control

Power

test

Speed

modificotions introduced

12

from four-trock
from 220 volts 50

ports ' .

swilch
swilch .

on CHI or

monourol recording

conlrol

guides

tope

heod

without Tqndberg

l2-4

heod

without Tondberg

l2-2

heod . .

Tondberg tope

for

. .

ihe

the

circuits .

beqm
current.
of the

the

ploybock

the

lotol

outPuf

Power

outpui level

.

FM MX-filter

response

currenf

record

indicolors

osc, frequency

equolizoiion

curves
curves

frequency resPonse

.

to iwo-frock

c/s to ll0

ports

.

CH2 ,

or 2 .. '....,.

I

Tondberg test

with

topes

test

test lqPes

lesi topes

recorder

omplifier

in omp'

ond the eleclronic

ond the bios

pre-omP ouiPuts

coils Ll ond

.
.

tope recorder

to the

models .

volfs

..........

position

... ..

60

.'.....".

Technical specification,

1.0
Tandberg tape

recorder

models

12-4 and12'2

requirements:

Power
Power

consumption:

Motor:
Tapespeed:

Playing time:

Model

Model

l2-4'

l2-4:

Fast wind
Tape

Recording tape:

Automatic

Heads:

Model l2-4: Quarter-track

Model

Frequency

Distortion:
Signal

Model

Model 12-2'

Crosstalk:
Wow

Erase and

Recording

lnputs:

and rewind:

path: The tape moves

slop:

I2-2:

response:

noise ratio

to

l2-4:

f lulter:

and

bias frequency:

level indicaior'

220 volts 50
58 watts

i 00 watts aI

pole.

Four
71/2,33/t

NAB standards.
Four-track recordings on
Tape speed

Tapespeed
Tape speed

Two-track recordings on

Tape speed
Tape speed
Tape

speed

The fast wind or

pointing

Maximum

auiomatic

The
or rewind

Quarter-track
Half-track erase

Half-track combined record

i.p.s. 30-20.000

7'

l,

33/a i.p.s. 30- I 3.000

17/a i.p.s. 30- 2.000

ln AMPLIFIER oosition: t
The distortion from the

The distortion from the
The signal

recording level, i.e. nearly closing of
from the tape).

The

signal

recording level, i.e. nearly closing of the electronic

from the tape).

The

crosstalk reiection

Better ihan .I % at 7t/z
Better than
Belter than .25

The

erase

current is less than .5 %.
The electronic beam indicators are equipped with damping circuits. The

range is

The

indicators are closing

2

Microphone

lmpedance,200

Contacts: 5

c/s.

2 X 1

at

2

l7/e inches

and

7Vz i.p.s.: Stereo
37+ i.p.s.: Stereo

l7/o i.p.s.' Stereo

7t/z i.p.s.:
3% i.p.s.: Stereo

17/6

towards

reel

modes.

to noise ratio

io noise ratio is better

.15 %

and bias frequency is 85,5 kcls. The even harmonic distortion

dB, plus

25

pin

watts output

,25

.l

X

0 watts output

per

1200 ft.

1200 ft.

Stereo 32

Stereo

i.p.s.:

rewind of

from left to

the f ront of

diameter

stop operaies

head.

erase

combined

heao.

at

al

Y"

inpu?s

ohms unbalanced. Sensitivity:

DIN contacts.

.l200

7". Good

record and

('l

c/s

(-r

cls

(+2

c/s

2 dB 30-.l6.000 c/s.

record
playback

is

better

is

better
i.p.s. tape

33/+ i.p.s.

l'/o i.p.s. tape

overload.

at optimum recording level

(ch.

I and ch,2l:

power.

power.

amplifiers are equalized

second.

2 X 32 min.

2X 64 min. Mono

2x

.l28

the tape recorder.

during

and

2
2 dB 50- I 0.000

The

tape:

of

128 min. Mono

tape:

of

min.

Mono

64 min. Mono

min. Mono 2

ft. of tape

right. The heads are

quality recording tape

record

playback

playback

40- 16.000 c/s).

dB

60- 5.000 c/s).

dB

amplifiers

amplifiers is

than

ihan

than

tape speed.

is less

55 dB when the tape is
the

58 dB when

dB at

60

speed.

speed.

Mono 4

takes approx. 2 minutes.

or

head. Air

electronic

X 32 min'

4X 64min.

4 X i

2 X 32 min.
2 X 64 min.

.I28

X

playback

head. Air

c/s).

than

less than

400

c/s.

l50pV. Dynamic range *40d8.

min.

28

min.

positioned

is recommended.

as well as during

gap:

gap:

.5

%.

.5 %.

beam indicator

the

tape is

beam indicator

(5

% distortion

with

.003 mm

.003 mm

recorded to

recorded to optimum

to conform

the

air

fast

(.O012").

(.00012').

optimum

(5%

disloriion

(5

distortion

%

in the bias

indicator

from the tape).

with

A

gaps

wind

i

I

4

Oulputs:

2

line
HIGH LEVEL:
Impedance: I Mohm.
contacts

LOW
lmpedance:
Phono contacts and DIN

FM-Multiplex inpuls:
The model l2 tape recorder is furnished
the multiplex filter

Playback Preamplifier
lnternal impedance

of
(ch.

and DIN

LEVEL:

the setting

I

ch.2)

and

and

I

Sensitivity:

connector

.l00

kohms.

in

or oui.

oulpul:

is 5 kohms. Open circuit output voltage 750 mV, independent

of all

switches

are furnished

2):

ch.

marked

Sensitivity:

connector

The

switch controls

and controls during

for

75

mV. Dynamic range

CR PHONO

7,5 mV.

marked RADIO

connection

(ch.

inputs

(pin

Dynamic

a FM-Multiplex

with

all

to

external

+40

No. 3 and 5).

range *40 dB.

(pin

No. I and 4).

switch

inputs.

playback.

power

dB.

Contacts: Phono

which

phono

Two

amplifiers.

Contacts:

switches

contacts

Spea kers,
Bass

control:

Treble

control:

Momentary
tever:

Counter:
Tubes

and

l2-2:

Tra nsi

Rectif

Dimensions:

Weight:

start/stop

models

stors:

iers:

l2-4

low lmpedance

External impedance
parallel
loudspeakers.

Cenler

lmpedance

tion

position
parallel

pnones.
Power

Maximum output
(ch.

connection to external

Two

The bass response
playback

will only
even when

The treble

playback
f

lat f requency response.

The
The 4 digit counter

2 EAM 86.

2

AC
2

l0ea BC 1098, 2 ea BC

Tl

Bridge rectifiers:
I
I ea B 250 C 75/30 KP.

In teak cabinet l5'

wide and
Approx. 23 lbs.

with two DIN loudspeaker contacts

Channel

75O mY

is

(AMP)

with one DIN loudspeaker contact

ouipul:

I and

speakers

momeniary start/stop

pairs

of

r52).

pairs

of

4 ea

3030,

ea B 40 C 3200.

oulpul:

is 4

oulpul:

is

82 ohms

open circuit. Output voltage in

is maximum 3

power

ch.2)

in

7" X

or in amplifier mode. This

presented

be

the

other

response

or in amplifier

complementary lransistors

matched transistors AD

284812.

67/u" high.

is

parallel with two

speakers.

4".

can be

on

channel is connected for recording.

can be continuously

shows

long, I l"

u"

I

Two standard

ohms.

from each

I0 watts in

continuously

fhe

mode. Minimum bass and maximum

lever

the number

114, 6 ea BC 113, 2 ea BC

amplifier. Output voltage in record

volts

open circuit. One standard telephone

each channel. Two standard telephone

DIN loudspeaker contacts are furnished

increase of

channel

starts

or stops

of revolutions of the take-up turntable.

AC 127, AC 128

(alternatively

150

,u"

f

telephone

furnished

are

playback

furnished for

are

increased approx. l2db at 80 c/s

the

which

is set for playback

decreased approx. 1 5

the recording

iacks
for connection

position and

low frequency amplification

or

(alternatively

AD

149

or STF

1078, 2 ea SE6002,

(ch.

I and ch.

connection to head-

or amplification

at I 5 kc/s during

dB

treble correspond to

playback

AC

213).

2) in

to

external

posi-

amplifier

iack

iacks

during

instantly.

127,

i ea

in

for

2.0 The function of the controls

,+1

l. Treble control:

2. Bass control:

3. Volume controls:

Record level

4.
ind icators:

Microphone

Front and rear

6.

trim covers:

7.

Momentary start/

lever:

stop

inputs:

Fig. l. The operoling conlrols.

Decreases
l5 kcis. The

lncreases the bass continuously. Maximum

The bass conirol
Conirols

mooe.
Upper knob: Channel

Lower

lndicates the recording level. Optimum

electronic beam

Left indicator: Channel i
Right

Low

Remove the trim covers to clean or demaqnetize

Stops the recording or

position. The record

to left

the treble continuously. Maximum

treble

the recording

Channel 2

knob:

indicator:

impedance

posiiion.

Channel 2

control

is

operative

indicators are nearly closed.

inputs

is

gain

((Upper

1

(Lower

(upper
(lower

(200

playback
playback

or

operative

during

in record mode and

track).

track).

track).

track).

ohms)

during

playback

channel I and channel 2.

instantly when

will

start

treble decrease is approx. l5 dB at

playback

bass increase is approi.

and

recording level is obtained when

immediately

and

the

position.

output

lever is

when

in AMP

the heads.

the

in AMP

position.

l2

at 80 c/s.

dB

volume in

moved to the right

the lever is moved

playback

4,

the

Function selector

8.

switch, channel l:

Activates the electronic circuits for record,

playback

amplifier mode, channel l.

or

9. Funclion seleclor

channel 2:

switch

'l0.

Automatic

end

switch:

I

l. Speaker selector

switch.

12.

Tape counter:

stop

Activates

Stops the motor when

the electronic circuits for

the tape runs out or

EXT: External speakers only.
EXT* INT: External

and

internal
INT: Internal speakers only.
CHI EXT,

terminals. The output
CH2

terminals.

Indicates

CH2 INT: The output

CHI INT: The output

EXT,

The output from

position

the

from

the tape.

of

record,

if

playback

the tape

amplifier mode, channel

or

breaks.

speakers.

from CHI is connected to both external

CH2

is

connected

from CH2

to both

is connected

CHI is connected to both

internal

to

internal

speakers.

both

speakers.

external

2.

speaker

speaker

13.

Operating lever:

14. Re-set

;

15. Power
'I

6. Speed selector:

3.0

The

push

button:

switch:

The input

and

input and outpul terminals

FM-MX filter and the

are located

ment
fiq. 2 and

CH.2

HIGH

3.

at the rear

Activates

Re-sets the tape
Switches
Selects the

output terminals

pre-amplifier

of

MX-FILTER

SWITCH

the mechanism

counter fo zero.

the mains on or

required tape

together with the

balance

adiust-

the tape recorder

cH.1

HIGH

a

the lape recorder for the different modes of operalion.

in

.

off
speed.

ref.

PREAMP. BALANCE 4

OUTPUT CH.1

ADJ. SPKR.

OHMS

CH.2

HEAD. 4

PHONES

CENTER CH.

OHMS

SPKR.

CH.1

cH.z

LOW

Fig.

cR cH.1

PHONO

The

2.

input terminols

RADIO LOW

ond the

FM-MX

filter

$;r{ii

switcn.

iqi

:,1 i!

I

PREAMP. 4 OHMS CENTER 4.

OUTPUT

The

Fig.3.

CH.2 SPKR

cH.2

terminols ond the bolonce odiustment.

output

CH.

OHMS

SPKR

cH.1

MICROPHONE

model series

The
microphone contacts.

The European

tors ref . fig. 4.

INPUT5

l2 is

version is furnished

@)

V

cHt

available

A

((.t

\t/

n

200

Mtc

cH2

with

with

'))

two

DIN

different

connec-

The US

iacks
Both versions

impedance

150

version

ref .

trv.

fig. 5.

200 ohms

furnished

is

the same

have

with standard

specification:

unbalanced,

input

telephone

Inpul

sensitivity

mechanism,

The

4.0
adiustment

and

The main
the turntables

f unction of the

and

Fig. 4.

mechanical

the

capstan

detailed

description

instruction

system is

in the different

to

drive

modes

tape molion.

of

the operating

by

mechanical

The

lever.

Fig.5.

function

$

a

a

ss

+

is activated

{,

F

Fig.

Top view,

6.

wilh lop

cover removed.

4.I THE

OPERATING

LEVER

The

operating lever

located

at

fhe

Normal forward

(54.1)

right front

drive, fast

has five

corner of

positions

the

tape recorder:

and

forward drive, fast rewind,

is

OPERATING LEVER

free, and neutral.

The

operating lever activates

The motor

switch

(33.2):

the following

disconnects the power

motor

free

(14.1)

position
lever, and activates
tronic beam
mal forward

fape recorder

parts:

in neutral

the

of

operating

the elec-

indicator

when

drive,

is

to record

set

to the

in

nor-

the

or

mode.

)

;

The eccentric
(59.17)l

segment

guides

the
assembly
ing arm

(59.i8).

pressure

(5.l.3)

wheel

and the lift-

The trip bar

4.1.1 The motor

The microswitch
for the
nected in
by

the operating

neutral

)

iF

connects the

in neuiral

switches are

(52..I):

switch

(33.2)

is

operating lever,

series

or free

power

or free

lhe

with

lever

(54.i)to

position.

to the

position

set to record.

activafes

the

clutches under

both turntables

located

ref. fig. 7. The

motor

The motor

electronic

when the

the

on

switch

current and is activated

shut

off

switch

beam indicafors

function

(65.1

,

bracket

the

motor in

also

selector

65.2).

(54.9)

is

con-

dis-

Fig.7,

The operoling

IHLL

lever.

MICRO SWITCH
OPERATING POINTS

Adlustments
The operating

be set according
the

operating lever
either normal
tion. Unscrew
Adiust
(33.5)
(33.2)

lhe

and

obtaining

poinl.

point

of

to f i9.8.

(54..|)

forward,

three

the

horizonial

position

ihe vertical

proper

microswitch

the

The motor

is moved

fasl

wind or

screws A, B,

of

position

positions

of the microswitch

for

(33.2)

should

should

start

from neutral

rewind

fast

and C ref .fig.7.

the

delrin bracket

correct

operating

when

to

posi-

Fig.

Adiusimeni

8.

77-

(.

3'.)

of

the operoting

---l>

77^

/ z"\

points

for the microswitch.

The

4.1.2
The

the upper mounting
the
The eccentric
wheel assembly

eccenlric segmenl

eccentric

operating

segment

lever

segment

(5.|.3)

(59.17)

plate

(54.1).

(59.17)

with

is located

(71.2),

Ref.

fig. 9

moves the

pressure

the

underneath

and is connected

and

10.
pressure

(5

wheel

l.l"

to

against
(54.'l)

The
ment
(53.1)

operating

position.

the

is being set

lifting arm

(59.17)

from

capstan

contacting

modes, except

(66.2)

to normal forward

(59..l8)

and releases the

is

the

when the operating

drive.

linked

moior pulley

in the normal forward drive

the eccentric seg-

to

transfer wheel

speed

(62.1)

lever

in all

+

Fig.9. The upper

Adiustments
Adiust the return

sembly

4.1.3 The
The

operating
when the
forward drive.
The pressure
spring tension, with the

running through two
wheel bracket
sure

springloaded

of the

Adiustments
The balanced

(51..|)

pressure
and
wise or counter clockwise until the tape

ly by

drive.

tween the tape and the
that
face of the

(51.3)

pressure

pressure

position

operating

wheel

upper

is

adjusted
wheel against the capstan. Loosen screw

turn

the

the pressure

Make

tape

the

pressure

motion

by

bending

wheel

by the eccentric segment

wheel

(5LI2).

(51.1)

play,

on

mounting

spring

to

spring

that no air-pockets

sure

is completely

of

assembly

wheel

assembly

(54.1)

lever

(51.1)

is mounted under balanced

pressure

oblong slots in

This

approx.6 mm

a line

plate

tension of the

obtain

equalization latch

wheel

pressure

covered by

wheel.

pressure

the

the

mouniing

perpendicular

uniform

(5

l.i)

Ref. fig.

(A)

lug

(51.3)

(71.2).

is

is moved to normal

wheel shaft

gives

(t/a")

Ref. fig. 10.

pressure
pressure

in normal

are formed be-

wheel

ihe rubber sur-

l0

wheel

ref.

fig.

guided

pressure

the

the

horizontal

to the

(51.1

l) clock-

runs

forward

(5

l.l)

and I1.

mounling plole, bollom

ascertain easy
tween

as-

should

9 to

(59.17)

(5

pres-

front

wheel
of

smooth-

ing

into

1.2)

the

E,

and

Fig.
ossembly, exploded view.

view.

threading of the

the

not

the threading.

I0.

The pressure wheel

two

stick

against the

trim covers

tape

(73.1

pressure

,

tr

in

the slot

73.2). The tape
(5

wheel

I .l

dur-

)

be-

--@

l(

t

10

;

tr

AZIMUTH

oii'J'Jil*'),u.,

Fig.

Il.

Mounling of

the heods with the

pressure

wheel ossembly.

Fig.

12.

The

Lb"l

,,*3

xfx

&r

iatg

,4$

s

'?1't.:

lower

mounting plote, wi'lh

the

turntobles

removed,

E/

t

sriQ

uc

brake

tape

The

4.1.4
(51.9)

brake

tape

The

assembly

wheel

lever

wheel

prevents
iever
mentary

tion).

Adlustments

Set

and the
tion, with

prevent
pad

Start

stop
should
until

the record/playback

the tape

(54.1)

start-stop

the operating

momentary
the tape

arm

fhe mechanism
lever

be completely

the spacing

(5

1 .3) and

(51.5).

is in normal

tape inserted.

(59.2)

to the

Ref.

from

lever

lever

from

pulled

is

left
between

is located

is activated
fig. I
creeping

forward

in stop

(54..|)

siart-stop

The

creeping

away

moving

by

position. The
disengaged.

head is approx.

inside

l. The tape

when

drive,

position

normal

to

lever

brake

tape

when

from

the

Adiust the

the tape

pressure

the

pressure

the

by

brake

the operating

the

with

(right

forward

to the stop

(51.9)

pressure

the

head.

erase

the

momentary

brake

tape

screw

(5.I.9)

brake

(.08").

2 mm

(51.9)

mo-

posi-

drive

posi-

should

+

start-

(5.|.9)

F

and

The trip

4.1.5
The trip bar

plate

ing
(54.1).

underneath
motion. The
determined

4.2 THE
The design of

fig. l3

around
(65.3).

riveted to the

are

(52.1)

(71.1),

Ref. fig. 12.

both

by the raised

TURNTABLE

and 16.

the two

housings

The

bar

is located

linked

and

trip bar

The

turntables

vertical

position

ASSEMBTIES

the turntable

The turntable

housings

for the

lower

across

to the operating

activates

(65.1

areas of

for the

mounting

65.2)

,

the two

of

the

assemblies

assemblies

turntable

turntable

plate

lower

the

the clutches

by

trip

is shown

are

bearings

(71.1)'

mount-

lever

a sliding

clutches

(52.1).

bar

built up

bearings

(65.3)

is

in

Fig. 13. The supply

@

lurntoble ossembly,

4s

exploded view.

12

4.2.1 The
The

inserting
pulley
thaf
drical
lugs
lie

on a
upper mounting
pointing

disc

have passed

(59.6).
wise.

locked
(59.6),

fits

into

13 and

lnsert
pressing

-

Place
disc
wells.
pins
table

supply

turntable

supply turntable

the helical

(6.|.2)

disc

the

compression

groove

and

the tongue

line

compression

over the housing

in the cartridge

perpendicular

plate

towards

(61

.2) unfil the

the front.

delrin lugs

through

Turn the

Make

in

and

the

cartridge

sure that the

position

by the claws
that the
groove

in the

14.

the

flange

it into the

the

mylar

(61.2),

Attach

inside

(65.2).

for the turntable

upper

sheet

and

insert

the tape

the

two

springs

Ref.

fig. 15.

assembly

assembly

spring

on

(6i.7)

the cartridge

to the

(71.2),

Press

the

notch in

(61.1

two

tongue

on

clutch lever

end

(61.4)

on the top

the two

tight

disc

(61.9)

put

is

together

(61.7)

spring

(65.3).

fits

(6.|..l1).

into the

The

(61.11)

front

edge of the

with the

delrin

down the

on the

cartridge
the

clutch lever

l) 90o

delrin

counter clock-

lugs

on

the clutch lever

the cartridge

(59.6).

housing

the

of

housing

of the

and

(61.9)

with the

insert

springs

(61.6)

by first

and

the

Make sure

sylin-

two delrin

should

tongue

pulley

(6l

l

. l

have

been

(6l.l

l)

Ref.

fig.

(72.2)

by

(65.3).

pulley
in the

short

the turn-

)

Fig.

15.

The supply pulley

disc

wirh rhe

mylor

sheer.

a

Move

ihe

tion.

This

will allow

the

on
on

plate

Ascertain

0.1 mm

f lange

the

turntable

(71.1),

an axial play

(.0t"1.

Fig. 14. The

operating

(72.2).

shaft, under

before the

supply

(54.'l

lever

the

supply turntable

Insert

one

to

)

teflon

the

in

the

pulley

delrin

nut

turntable

disc wiih

the

fast

wind

(65.2)

washer

(M355)

lower mounting

(65.5)is

attached.

shaft of approx.

the clutch

lever.

posi-

ro rest

4.2.2 The
A

slight permanent

furntable

loop from
table
operating
sfarf-stop

is a

green
(65.2),

(65.2)

(65.2)

lever is

spring

felt
ref.

tape

being

and

lever

loaded

washer

f ig. 13.

Adiustments
The

adiustment

two

springs

cient

to take

lever

is in
stopped
recorder
the supply

Nofe:

(61.9).

up

normal forward

by ihe momenlary

should be

turntable

Do not

excessive
fl

utter.

tight

tension

clockwise

has

been

introduced

formed

the trim

is

in normal

between

covers

operated. The

friction

disc that presses

underneath

is

made

by stretching

The

torque

the loop formed

drive, and

start-stop lever.

loaded

with a full

(65.2).

increase

torque

this torque

might

torque

to
the

(73.1,73.2)

forward

drive,

tape tight

the

supply turntable

should be

when the

the tape recorder

7"

unnecessarily,

introduce

the

of

prevent

supply

when rhe

and the

disc

against

cutting

or

iust
operating

The tape

tape reel

wow

supply

a tape

turn-

(61.6)

a

the

suffi-

on

as

and

13

4.2.3 The take-up
The

take-up turntable

the helical

disc

compression

(61.1)

compression
groove
and
a

line

the

in

the tongue

perpendicular
mounting plate
ing

at the rear

Press

down the

on the cartridge

in

the upper

(59.8)

lever
The

space between
will now be
(61.1l)

90o

delrin lugs have

turntable assembly

is put together

spring

over the housing

spring

(61.8)

cartridge

(61.11).

on lhe cartridge

to the front

(71.2),

edge

pulley
(61

clutch lever

all the

with

the lower

of

disc

. I 1) have

(59.7).

way down by using a

the two clutch

approx. 6 mm

clockwise, and make

been locked

one the lower clutch lever

by f irst inserting

(6.l.8)

(65.3).

fits into the

The two

(6.l

I

.l

edge

the

delrin tongue

mounting

(61.1)

until the

passed

through

Press the

levers

Turn the cartridge

1t7o"'1.

sure that the two

position

in

(59.8).

Ref. fig. l6

the

pulley

and

Make sure the

sylindrical

delrin

should lie

),

of

lugs

on

the upper

point-

(71

plate

.l

).

delrin lugs

nofch

the

lower clutch

screw driver.

(59.7,

59.8)

by the claws

and 17.

f

14

Fig.

16. The toke-up

iurntoble ossembly,

exploded view.

Fig.

17. The toke-up

f

the

nsert
pressing
and

flange

into the

it

insert the turntable

pulley

the

for

upper end

(65.1).

turntable housing

Move the operating lever

position.

to rest

(M355)

ting

Ascertain an axial
approx.

This will allow the take-up turntable

the

on

the turntable

on

(71..|)

plate

flange

(72.1).

before

shaft, under the
the

play

0.1 mm

(.04").

disc with

the clufch

lever.

(72.1)

of the housing

(54.1)

to the fast

rewind

lnsert one teflon washer

moun-

lower

(69..I)

pulley

of the turniable

is attached.

shaft of

f

by

(65.3)

(65.i)

G

4.2.4

Horizontal and vertical

the turntables

of

alignmenls

Use the special tools I , 2, and 3 for these alignments.

Ref. fi9.

Horizontal
The horizontal

65.2)
checked by
turntables as
spacing between the ruler

65.
alignmenls

parallel

placing

position

of

the

two lurnlables

to the lower mounting

the

shown

special

in fig. lB. There should be no

tool

(tool

No. I

No.

plate

across both

i)

and the

(65..|,

(71..l)

turn-

is

tables.
Necessary

table

No. 3,

adiustments

housing

as shown
The horizonfal
parallel
the upper

the

The

to a

special

edge

of

line

mounting

tool

the special tool No. 2 should run

in

position

No. 2.

are made

correct

position.

in fig. 19.

of both turntables

perpendicular

(71.2)

plate

by bending

the turn-

Use the special tool

(65.1

,65.2),

to the front edge of

is checked by

using

exactly

into the tape

the

operating lever

groove

in the

(54..l)
Ref. fi9. 20.
Necessary
table

tool
Vertical

The horizontal position
before
The

the tape threaded
touch

adiustments are made by bending

housing

No. 3, as

(65.3)

shown

in correct

in fig. 19.

alignments

of the turntables

vertical alignment

lhe

the

position

on

edges of

the turntables is

of

the recorder.

plastic

the

vertical

operalion.
The turntables are raised
adding

tween

and the
A final check

tables

or subtracting turbax washers

the flange

for the

turntable

turntable housing

of the horizontal

should be made.

(79.13,79.1

guide

in

is

the neutral

position. Use

is made.

The tape

reels in any

or lowered,

housing

(65.3).

Ref. fig.

position

4),when
position.

the

special

must

checked

should

mode of

if

necessary,

(M306-7)

(72.1

13 and 16.

of the turn-

turn-

be set

with

not

by

be-

,72.2)

Fig.18. Control of the horizontol

position

of

the

turntobles

wilh

iool No. l.

SPECIAL TOOL NO,2

t

Fig. 19. Alignment of

4.3

CLUTCH ATIGNMENTS

4.3.1

General
The motor
(61..|,61.2)

either
position.

will

when the operating

normal forward drive, fast wind, or

The two

directions caused

(62.2).

belt

drive

the

horizontol

with fool No.3.

always run and

pulley

discs will

by the cross threading of

Ref .

fig. 6.

position

the turntobles

of

drive both

(54.1)

lever

run in the

pulley

discs

fo

is set

fast rewind

opposite

the rubber

Fig. 20. Control of the horizontol

wilh tool

torque

The
by the

the feltrings

and

friction between

The

of the turntables

fricfion between

glued

the

tables is determined by the

(54.

pulley

(52..l),

I

).

mounted

under each

rated by the trip bar

operating lever

position

No.2.

(65.1,

pulley

the

to

the turntables

pulley

position

lhe

of

65.2)

discs

and the turn-

discs

of fhe

disc. The clutches are

is

which

connecfed

turntqbles

is

obtained

(6i.1,61.2)

(65..I

65.2).

,

cluiches

ope-

to the

4.3.2 Fast

The supply
The

supply
friction
fi7.21.
The
(65.2)
(61.7).

The trip
(59..|9)

tion.
the clutch

Adiustments
Adiust
screw
(59.6)

approx.
The torque

min.
Recheck

finally

with

pulley

by

lhe

bar

on the clutch

The two

lever

the heighi

(A)

until

and

0.5-l
g

75

all

seal

rewind

turntable
turntable

the

pulley

(6.l.2)

disc

entire tension

(52..l)

has

lever

delrin

lugs

(59.6)

of

ihe clearance

the

delrin

(.02'

mm
the

of

(23/a

other

the

supply turntable

acting

oz)

positions

adiustment

.^.\

:'v

'-^1,

':':'

Fis.

2l

.

(65.2)

has maximum

(61.2)

disc

is pressed

of the

moved,

(59.6)

the

on

are

disengaged.

the

clutch

between

lugs

on

-.04").

on an

of
screw

the

the

obtainable

position.

in rhis

against the

compression

and

the delrin button

is

ai the lowest

cartridge

lever

cartridge

arm

operating

A.

(6.|.1l)

(59.6)

the-clutch

(65.2)

should be

of 8 cm

Ref.

turntable

spring

posi-

and

ihe

by

lever

(6l.l

i) is

(3y2").

lever and

The take-up
The take-up
from ihe
position.
The trip
(59.19)

position,

est
(59.8)

Adiustments
Adiust the

the screw

(61.1)

disc
approx.0.5-l
sitions

iustment

pulley

Ref.

bar

the upper

on

and

the two

height

(B)

and

the

of

screw B.

turntable

pressing

lurntable

disc

fig.

22.

(52.1)

has

delrin lugs

of the

until

the

feltring

the

(.02"-.04").

mm

operating

Fis.22.

(65.1)

is completely

(61.1)

and

moved,

clutch

lever

down both

on the

upper clufch

clearance

on

lever

and

disengaged

free-running

and

the delrin builon

(59.7)

is at the high-

the

lower clutch

cartridge

lever

between

the

turntable

Recheck

finally

all other

seal the ad-

(61.1l).

(59.7)

the

(65.1)

in this

lever

by

pulley

is

po-

f

,

4.3.3

Fast wind

The

supply turntable

The

supply turntable

{rom

the pulley

position.
The trip

(59.1
tion, pressing
ridge

Adiustments
Adiust
screw

(61.2)

0.5-l
the
screw A.

Ref . fi9.

(52..l)

bar

9)

the

on

clutch lever

(61..ll).

the

(A)

and the feltring

mm

operating lever and

down the

height of

until

the

(.02'-.04").

Fig. 23.

(65.2)

(61.2)

disc

23.
has moved,

two delrin

the clutch

clearance

the

on

Recheck

finally

is

completely

and free-running

and

the

lugs

lever

the

(65.2)

other

delrin button

highest

(59.6)

(59.6)

is at the

between

turntable

all

seal the

disengaged

in this

posi-

on the

positions

adiustment

cart-

by rhe

pulley

disc

is approx.

of

The

take-up turntable
The take-up
friction with the
springloaded
delrin lugs
tion to ihe
(61.8).
The trip bar
(59.19)
position,
the iwo delrin

Adiustments
Adiusf

the

screw

and

the lower

0.5 mm
The

torque

min.65

rhorlz

turntable

lower clutch lever

the cartridge

on

entire tension

Ref . fis.

(52.'l)

the

on

upper clutch lever

disengaging the

lugs

the height

(B)

until

(.02').

of the take-up

g(21/t

oz)

Fi1.24.

(65..l)

pulley

disc

24.
has

moved, and the

on the

of the upper

the clearance

clutch

levers

acting

on

has

maximum

(61.1)

in this

(59.8)

(61.1

l) upwards

of the compression

(59.7)

lower clutch

cartridge

clutch

befween the

(59.7,

turntable

an

arm

of 8 cm

obiainable

position.

is pressing

delrin button

is at

the

(59.8)

lever

(6.l.1l).

lever

59.8) is approx.
(65..l)

should be
(3t/2").Re-

The

in addi-

spring

lowest

and

(59.7)

upper

I

the

by

Normal forward drive

4.3.4

Fis.25.

The

supply

The

supply
from the
position.
The

trip
(59.19)

tion,

t

ridge
Adiustments

Adiust
screw
(61

.2)

0.5-l mm
the

operating

screw A.

4.3.5
The motor
(61.1,

turnfable

turntable

pulley

Ref . fig. 25.

(52.1)

bar

on the

pressing

(61.1i).

height

the

(A)

until the

and

the feltring on

(.02"-.O4").

Neutral

power

are

6.l.2)

(65.2)

is completely disengaged

(61.2)

disc

has moved, and

clutch lever

the

down

of the clutch levgr
clearance between the

lever and

and

(59.6)

delrin

two

the

turntable

Recheck all

finally seal the

is shut off,

not running.

free-running

the

delrin button

the highest

is at

lugs

on

(59.6)

pulley

(65.2)

is approx.

positions

other

adiustment

pulley

the

and

in this

posi-

the cart-

by the

disc

of

discs

take-up

The

take-up

The

the

with
of the take-up
take-up the tape in

fis.26.

The trip bar

(59.19)

posiiion, pressing
lever
are released

(61.1)
the

tension of

Adiustments
Adiust the
the

screw

(6.l.1l)

lower clutch levers

torque

The

12-25

Recheck

finally

turntable

turntable

pulley

disc

turntable

(52.1)

upper clutch

on the

(59.8).

The

from

pressing

is

the

height

(B)

until the delrin lugs on

is

the center

in

the take-up

of

(

/r-l

9

all

other

the adiustment screw

seal

Fi9.26.

(65.1)

(61..l)

record

has

down

delrin

any
against the
compression spring

the upper clutch

of

(59.7,

acting

oz)

positions

has a

position. The torque

this

in

(65..|)

should

playback modes.

or

moved, and

the spring loaded

lugs on the cartridge

tension, and the

position

(59.2)

lever

turntable

between upper

59.8).
iurntable

an arm of

on

the

of

operating
B.

reduced friction

suff icient

be

Ref.

the

is

(65.1)

(61.8).

lever

(65..I)

button

delrin

the middle

in

clutch

lower

(61..|l)

pulley

the cartridge

8 cm

disc

only

(59.7)

and

should

131/2").

and

lever

to

by

by

be

t

2l

Fis.

28.

(65.'l)

has maximum

(6

disc

I .l ) in

obtainable

position. Ref

this

.

17

supply

4.3.2, Iast

turnlable

turntable

The supply
The
friction with the
chapter

(65.2)

pulley

rewind.

Fis.27.

has maximum

(61.2)

disc

in this

obtainable

position. Ref .

The take-up
The take-up
f riction
chapter

with the

4.3.3, fast wind.

turnlable

turntable

pulley

4.3.6
The

motor

6).2)

Free

are

power

not

running.

is

shut

off and

the pulley

(61.i,

discs

The

supply

The

supply

from.the

position.

turntable
turntable

pu-lley

Ref.

chapter

disc

Fig.29.

(65.2)

(6.l.2)

4,3.3,

is

complerely

and

fiee-running

fast

wind.

disengaged

in

rhis

The

take-up

The

take-up

from

the_pylley

position.

O,5mri

turntable

turntable

Ref.

chapter

(o.oz".

disc

Fig.

30.

(65.1)
(61.1)

4.3.2,

fast

is completely

and

fiee-running

rewind.

disengaged

in

ihls

'F

4.4

The

driving

engaged

(62.1)
three

wheel

3'/

u,

vertical

The

sef

0.5 mm
discs

motor

is

tracks

o,

dividing

the

Th-e
(53.1)

ley

has
lr.ultfgl

l'/

Adiustments
The

justed,with
tion.
be

between
pulley

18

pulley

mechanism

in

the

shown

and

position

the

(61

in

with

(53..l),

Zr/,

operating

rib

(.O2")

bottoms

.1

61

,

different
i.p.s.

of the
of the

.2).

with

the

speed

17

/ 6i.p.s.track

fig.3t.

below

of

The
diameters

corresponding

motor

lever

tS+.f

motor pulley

an imaginary

the

V-shapld

Fig.

transfer

on the

moror

to

pulley

in

l

grooves

31. The

olignment

wheel

motor

pul_

pulley (O).t)

ior

the

ipeej

the

speeds

(62.1)

is ad_

neutral

(62.1)

line

posi_

should

drawn

in

the

of

the

motor

pulley.

4.4.1

Threading

The

rubber

in

fig.
front
the

rear

lhe

supply

4.5

THE
The
mourting

\92 ).).

the

f ly-wheel (66.

tact

of

motor

6 and

drive

6.

The

of the.pulley (62.1),

of the pulley.

turntable

SPEED

speed

transfer

arm

The

speed

the

speed

pulley (62.1)

31.

of

the

rubber

(62.2)

belt

belt

is running

The

(65.2)

TRANSFER

wheel

(53.3)

and

rransfer

i

The

spring

).

transfer

and

rhe

drive

belt

is

crossthreaded

in

fhe

und

crossing

and

WHEET

(53.1)

is

driven

wheel

wheel

flywheel (66.1).

upper groove

in

the

should

the

motor

is

by

the

(5i.t)

(53.5)

(53.1)

lower groove

attached

secures

as

snown

liJbetween

pulley (62.1).

fo

the

moior

pulley

in

turn,

drives

the

con-

between

Ref.

the

fiq.

in
at

IG

rt

Adiustments
The

speed
mounting
parallel

the
mounting

g1.l)
The

vertica.l
is_adiusted
between
mounting
ing.between

higher
be

approx.0.5
i.P.s. position.
The

vertical
should
of

th.e

flywheet

extra
bearing.

The

horizontal

(53.1)

(5S.2)

9er
(53.1)

4.6

THE

T.he

-design

fig.34.

The.

lifting

and

the

upper

selector

arm

to

the

two

screws

arm

should

be

flywheel

position
by

rhe

arm

speed

position

minimum

be

rransfer

the

track

(66.1)

thrust

washer

Ref.

chapter

is-adiusredLy

runs

adiustmenf

and

alignment

(tool

parailel

I.IFTING

of the

arm

the

lower

jfj']n'''.iT,ll?;t8)

/

\Jy.t
tween

holder (S3.2).

The
wheel (53.1)
anf
rating

Adiustments:
Ref.
Loosen

fer.

ylauatly

the

responding
The
t"nl

ward
before

switch (33.3).
The
the
be
is in

Set
the
justmeni
is
and

33/a
spacing_
adiust

wntte

)

the

lifting

lifting

thg

flywheel

lever

fis.

34.

screw

wheet (53.i)

adjusred

splirs

X,

lifring

is

the

?f.

drive

to

the

motor

clearance

speed

rransfer

minimum

neutral

the

speed

operaring

arm

obtained

the

.and.

between

flywheel

i'1,

is

min.

if

necessary

the

mechanism

from

(54.1)

A.

y

and

to

rhe

occasioned

operating

neufral.

between

3

mm

position.

selector

lever

(53.8)

i.p.t'.

0,5

bracket

for

the

lower

Ml

(53.3)

approx..

"t

adding

for

the

speed.rransfer

o.n

(.O2,'1

mm

of

f

(66.1)

is

titiea,

4.7.
bendins

No.

6)

to

MECHANISM

lifting

(59.18)

arm

mounting

is

linked

parallel

arm

conracrwirh

(66.1)

except

The

lifting

and

rhu

for

the,thruu'rpu"i.'-6y

Z

on

speeds

The

current

wheel (53.f

when

to

neutrli

unril

the

(66.1).

tape

mm

and

re_seal

(29.3)

speed

mounting

l3).

and

tne

or

transfer

rhe

the

rnnn

in

(66.g1)

until

rhe

(59.

transfer

fnu"riru.ing

the

I

mm

.p""j

subtracting-irru.-

wheel

ylt!

(53.g)

releases

holdei
wneet

.otor.

in,n"

speed
t.Oa

)

ti"

Z,'lr-i

ii

ne.J.r.ii,

in

of

the

th;-;;;r;";

rihe

ftywh"Jj-(-oZ.;;'

mechanism

the

is
plates

t".

*,"

arm (53.2)

lg)

and

tnurnorolp,lley

in

porir-ionsTt

ulf

normal

between

;;;,.

rhe

liftini

7,

1",

Uy

u'iufJi*ly"'Jmall

(54..1)

lever

lifting

,nortJ

is

siut

the

motor

ar

1

rh"

;p;r;;ffiJver

t/u

to

l

i.p.s.

piriii."Ii*n

a

.p..inl

speed

trJnsfer

irr"

rn"

speed

1.0),,1

and

for

tf.'r"

uJirrt,i"it

is

adiusted

plate (it.J)

".ounting

lo*"r.

(.O4,,).

tru*f"l,rn"el

(SC.Z)

(SS.Sl.

*n""fijg.rf

frtt-uy'iur..,) should

i;/.-i.p.s.

transfer
il"i"*

ps.

the'O*LI.

speed

transfer

,puJ'rr""nrter

\

parailel

rocateJ

(Zl

..i""iri.

is connected

the-tia-nsfer

the

speed

forward

the

;rii"vi#.U

until

rarheel

(53.3)

(unscrew

between

n"t.

f ig.

washers

and

The

and

and

wheel

in"

upper

position.

Ui

addins

flywheel

wheel

wheet

wheel

is

shown

(53.7)

arm

between

.2,71.1)-The

,esrn"nt

wheel

transfer

(62.1)

,h"

drive.

speed

trans_

is

indi_

U"naing

arm

i"lo

6,0.]A), .or-

unJ

t1u-'i.p.r.

move-

from

normal

["

.if-JV

pulley

afl

.ompleted

the
(62.1)

speJds

should

micro_

t5a.t)

tape

speed

and

rhe

ol

O,i'^^

1.92,1

wheet (S3.1)

,plej'."tu.tor.

check

that

Ool.,

pt.itlons.

the
Re_

r.rurar

the

the

plate

Sa.

(53..|)

the

spac-

rhe

33la

(53..1

rim

The

an

hot-

in

the

be_

opu_

for_

and

ad-

to

n.

is

)

Fi9.32.
flywheel
the

beorings,

exploded

The

with

view.

THE CAPSTAN

4.7 THE FTYWHEEL
The flywheel shaft
mounted in two selflubricating

(66.3).

inss

Ref. fig. 32.

WITH

acts

as

the

capstan

and

selfadiusting

(66.2),

and

bear-

is

Adiustments

The vertical

the

with

as shown

stan

two

The
tion of
legs of

(71.2).

plate

4.7.1 The brake for
The brake spring
attached to the
wheel
The brake is engaged

(54.1)

lever

position of the capstan

special

screws

the capstan

the

(59..l8).

tool No. 5 inserted on

in f ig. 33.

(M.l25)

(66.2)

tool No. 5 touches

the

(66.6)

lifting arm for

Ref. fig. 6.

except

normal

are loosened,

is

obtained

the upper

flywheel

for

the

the

positions

in all

forward drive.

(66.2)

is

top of the cap-

and correct

when

mounting

flywheel

speed

the operating

of

aligned

posi-

all three

(66..l)

is

transfer

Fig.

Alignment

33.

of the copslon

wiih tool No. 5.

1

20

Fig.34. The speed

f

chonge mechonism.

,t

4.8

THE SPEED

The

speed change

in fig.

34.

The

speed
lowest
mounting
pressed
disc
The
from
zontally
(53.4)
horizontal

arm
of
presses
fer

track

against

(59.1.l)

speed transfer

the

approx.

is

turned

(59.

12),

the

cam

against

wheel

@

\

\

CHANGE

mechanism

transfer

arm

in

motor pulley

movement

disc

(53.3)

wheel

on fhe

for the

the lowest

the 1?

/s

wheel

1",

when

towards Ihe

is accomplished

which

roller

(59.1l).

the mounting

point

in

MECHANISM

is

designed

(53.1)

is

engaged

motor pulley

speed

transfer

(level

level

posirion.

i.p.s.

(53.1)

(62.1),

rests

The cam

D.

will

and

the

speed

33/t i.p.s. position.

against the

arm

for

as shown

(62.1),

moved

by the

disc

the

with

and
(53.3)

wheel

a)

on the

be disengaged

out hori-

selector

cam

curvature

(59.12)

arm

speed trans-

the
the

is

cam

knob

This

disc

is adiusted
(59.12).

alignment.

4.9 THE
The
signed as
The
sure wheel
lever

wheel
(5.l.2)

capstan
Adiustments

Move
position

Remove

MOMENTARY

momentary

shown in fig.

delrin

(33.11)

lever

with the

(66.2)

the

and

by

bending the

the

start-stop

bushing

lever

operating

(33.9)

(5

1.5)

is moved

(51.5)

moves

pressure

and activates

set the

nose

of

motor pulley

START.STOP

35.
will

point

in

to

stop

the

wheel

lever to normal

momentary

(62.j)

mechanism

press

B when

position.

pressure
iSt.l)

the

tape

start-stop

the

cam

to make

FEATURE

(33.4)

against

brake

the

the

start-stop

The pressure

wheel

away

from

(51.9).

forward

disc

is

pres-

shaft

drive

lever

arm

this

de-

the

in

ttr

The

vertical
lransfer
the

cam
slope presses
fer

wheel
position)
rotation

Adiustments
The

spacing

(59.12)

wheel

lifting

wheel

disc

(53.3)

to

the

of the

and

the

(53.3)

(59.

at point

should

of

(53.3)

11)

the

mounting

upwards

Ievel

speed

mounting

be 0.5

the mounting

is accomplished

between

from the

(3,

b

/ o

selector

D between

arm

mm

arm

the

levels

arm

for the

level

i.p.s. position)

(53.4).

knob

the

for

ihe

(.02',)

Fig.35.

The

for

by the

a

speed trans­a

cam

speed

wiih the

momentory

the speed

slope

of

and b.

(lz,/6
during the

i.p.s.

disc

arm

transfer

operar-

The

stqrf-stop

mechonism.

ing

lever

<STOP>>

(5-1.5)

by
of approx.
(51.1)
approx.0.2
lever
Start the
the
(51.5)
approx.
shaft
point
sure wheel
is approx.

and

(5i.5)

left

by

(St.2)

D.

(54..l)

position.

bending

0.5
the

mechanism
posifion.

bending

I

mm

Make

lever

0.5

normal

in

mm

capstan

(.O12")

mm

and

the

Adiust

the

(.04")

and

the pressure

sure

(5

(.O2").

mm

forward
Adiust
the

(.02")

I .5)

the

f lat

between

(66.2).

between

transfer

by moving

lhe

tongue

between

that

the

and

pressure

part

B

Ascertain

bracket

the

pressure

C

to obtain

the

wheel

space

fhe

start-stop

drive.

The

wheel

to obtain

pressure

ihe

pressure

the

(59.24).

start-stop

wheel lever

a

pressuie

lever

between

lever

spacing

lever

a spacing

wheel

play

a

spacing of

the

wheel

lever

wheel

(5i.5)

pres-

(33.1

of

to

21

at

I

)

4.IO THE
The
erase
erasure, and

when

drive.

(59.2)
and the transfer

(59.27)
in normal forward drive,

all

in
Adiustments

The

sionally, as
particles

tape movement.

Note: Do not soak the
The spring
signed
by bending
from
The tension of
erase head,

be 75-100
by
pressure pad.

PRESSURE

pressure pad

head and

to ensure constant

recorder is operating

the

fig. 11 and 35.

Ref.

is activated

pressing

is

positions

oiher

pressure

the accumulation

might seriously

with felt for

as a snap-on type,

the two tags on

the

slots

in normal

g

adiusting

the

PAD

(59.27)

is introduced

the

by

bracket

against

of

(59.27)

pad

pressure pad

the

in

pressure pad

the

forward drive

(25/e-3Vz

tension

is located

to
friciion

in

pressure

The

pressure wheel

(59.24).

the tape

and

the

operating

affect

pad

felt

the

and

the

oz).

of

and the

is completely

should

of dust

the

with

pressure

can easily

hard brass spring

arm

(59.27)

tension

This

the spring

front of

in

secure

The

be cleaned

maximum

for the

normal forward

pad arm

(5

lever

pressure

erase

disengaged

(54'1).

lever

iron oxide

and

erasure and

any liquid.

(59.1)

pad

pulled out

be

(59.2).

against

position,

(59.14)

should

is corrected

for

the

tape,

1.5)

pad

head

occa-

the

is

de-

away

the

the

actuating spring

The

guide
adiusted
point
The vertical
adlusted
spring
Misalignments

of

out
Ascertain

the actuating

of
cover

,

without sticking.

slot

to 2

Ref. fig. 36.

B.

position

shown in

as

should

the tape

sufficient

(73.1)

when

/D

shall run

(.08")

mm

of the

fig. 37. The

approx. 3

cover

cause the

could
guide.

clearance

spring marked

tape is

inserted.

free inside

widih of

The

by bending

vertical

mm

tape

D and

spring

('

/

actuating

between

the tape

slot

the

the bracket

(79.17)

part

of

of the

u")

to be

squeezed

the upper

the front

is

in

is

the

tape.

part

trim

rc

THE AUTOMATIC

4.I I
The actuating spring

located in the slot

is

The microswitch

mounting
The microswitch

runs out

tape

independent upon

(54.

r

).

(33.2)

(71

plate

.2)

(33.2)

if the tape breaks.

or

the

Adiustments
The

operating

bending the

ed by

Ref. fig. 36. The
in f ront of

(79.17)

spring
the front of

Fig.36.

point

actuating spring

operaling

the imaginary

is moved from

the upper mounting

Horizoniol

END STOP

(79.17)
of the right

is mounled

fig. 9 and 11.

ref .

shuts off

position of the operating

microswitch

of lhe

SWITCH

for the

iape

the

end stop

guide

under the

motor when

The swilch

(33.2)

(79.17)

point

is set 0.5

the actuating

line x-x,

odiustment of the

when

the rest

plate

end stop switch.

position lowards

(71.2).

switch

(79.14)'

works

adiust-

is

point A.

in

mm

upper

the

lever

(.02")

odiusfment

Verticol

Fig,37.

4.12 THE
The revoluiion
upper

hind the operating

driven

attached
Ref. fig. 9 and

Adiustmenls
The

mounted
(69..|)

(79.8)

vertical
belt

4.13 ASSEMBTING
The top cover
fig. 38.

Vertical alignment of
Two thick rubber washers
between
tightening lhe
will

adlustment of
The vertical
ed
tape

REVOTUTION

counter

the lower mounting

and

by a rubber

to the

pulley

is

for

position

(69.3)

be compressed

to ascertain

reels and the

shaft

53.

disc for

with the

flush

mounted tight

the take-up turntable.

of

to fall

off.

is

attached

the top cover

two screws

the top cover.

position of

sufficient

COUNIER

(79.23)

lever

(69.3)

belt

of

the revolution counter

counter shaft.

pullies might cause

the

THE TOP

the

and the mounting

and

the top cover should

fop cover in all

rhe

of

end stoP

is located

plates

(54.1).

The

and

the take-up turntable

up against the lock

Misalignment

COVER

to the recorder

lop cover

(74.5)

have been

(M.l30)

allow the

Ref. fig. 38.

spacing

switch'

between

(71

.2,71.1),be-

disc

pulley disc

The

the rubber

as shown

introduced

brackets.

the rubber

the

(79.23)

(69.2)

be adiust-

counter

pulley

a

slightly,

necessary

between
modes of operation.

the

is

(69.1)

(65.1).

is

spring

the

of

in

By

vertical

plastic

f

zz

-T

3?2ry

73s.

54.2

4

4l

M

321

32.2

130

m,

M

s3.4

79.34

The

5.0

electronic

adjustment

THE

5.I
DIAGRAM
The
series
The
u nits:

MAIN EI.ECTRONIC

block diagram of

l2

is shown in

tape

recorder is equipped

2 Record

Playback

2
2 Equalizing amplifiers

Power

2
2 Record level indicator

I

Oscillaior
The
The

Swilches o
opgn rn mono omp

circuits,

instructions

the

fig.

pre-amplif

pre-amplifiers

output amplif iers

power

supply

switching system

cH.1

cH.2

ond

bi

UNITs, BTOCK

Tandberg

39.
with

iers

circuiis

l,-ill:.1

detailed

tape recorder
the

following

description

The

equalizing

and

functions:

The differeni
combinafions
very

flexible tape
The amplifiers
only the amplifiers

explained in

amplifiers have

the following three

Record equalizing
Playback

Amplifier

equalizing

equalizing

units can be interconnecled in various

by the switching

system, creating a

recorder.

are identical for

for the upper track

the following

Pr€-omp

the two

discussions.

output

CH 1

channels,

are therefore

and

Closed in mono R€c

in stereo

ODen

Rec

cH2

5.1.1 Inputs

The

schematic

The circuit

nection used

These

recorders

instead of the DIN

iacks

inputs.

of

indicated

on tape recorders

When the
corresponding
CR PHONO

inputs

24

PB,

Fig.39.

the input

diogrom

Bfock

circuits is

by

fhe dotted lines is the

ore equipped with

contacts for the

microphones

HIGH LEVEL,

are

LOW LEVEL,

automatically

Erose

HEAO

models l2-4 and

shown in fig. 40.

in

sold

certain areas.

standardtelephone

microphone

plugged

are

in, the

RADIO and

disconnected.

Rec

/PB

HEAO

12-2. The diogrom

HIGH

LEVEL

LOW

.EVEL

con-

LEVEL

cA,2

Pre-onp

shows the switches

CRYST-

PHONO

Fig.40. The ;nput

oulpul CB

stereo

in

2

recording.

circu;ts.

n

T

cHASS.

I

GND.

i

I

,

MIC. PLUG

G

a

R IOE

27K

x

RO3

x

100

t0l

c

|

25y

25V

*

R 102

2,2

5.1.2 The record
The

schematic for the record pre-amplifier

in fig.4l.
transistor
in common emitier
nected

x

R 105

R 106

27K

Fig.

The record pre-omplifier,

41.

pre-amplifier

The record pre-amplifier

amplifier.

Ql01
connection

in

common collector

)F

,F

R

R lto

5 60^

K

68

l9kc/5
FiLTER

22K

and

connection

112

R9

313kc,/s i c5=250pF

Ql02

while

lower).
The record pre-amplifier
microphone
parallel.
input
ohms, unbalanced.
The capacitors
citors
The components
tive

feedback
emitter
The feedback
introduced
A negative
(R105,

input

and

When using the

is disconnected.

The input

Ci04,

for radio

frequency

Rl05, Rl07

circuit from the

of

Q10l

.

circuit is frequency

for

stabilizing the amplifier.

frequency

Rl06

and C103) is introduced

is furnished

line

one

input

microphone

The input

sensitivity is

Cl07 and Ci80

signals.

and Rl l3 form

emitter of

independent feedback

circuitofQl0l.
The

output
Cll0
control Rl. The
pre-amplif

signal from the record

and Rl15 via the

frequency response

ier is flat.

*R

contact Fll fo the Volume

rzs

schemotic.

is

is a three

are connected

Ql03

(emitter

with

connected in

input, the line

impedance

.15

are filtercapa-

a nega-

Ql03

independent

in the emitter

preamplifier

of the record

shown

stage

is con-

fol-

one

is 200

mV.

to

the

and

circuit

passes

5.1.3 The FM-multiplex filter
Ref. fig.4l. The

FM-multiplex filter, C6,
is introduced to remove the
appear
stereo

pilot

The
tain areas a
a

slight

5.1.4 The
The schematic for the
position,

the

on

output terminals

recepiion.

signal is usually a l9 kc/s

33,3 kc/s signal is used which will need

modification

of the filler, ref. fig.41 .

equalizing amplifier

equalizing amplifier in record

is shown in fig. 42. The record amplifier is

pilot

signal which

of

in RECORD position

L5
the tuner during
signal but in cer-

a four transistor amplifier.
Ql06

(Darlington
impedance
in
in common
The record

and

QIOT

connection).

and high amplification.

common emitter connection

collector connection

equalization is
feedback circuit
emitter

The

of

Q107.

emitter feedback circuit decreases the amplifica­tion approximately
rrequency

response.

The lower range

determined

ance

circuit Ll, Cl25 and Rl36

quency

response.
The low frequency response
citor C I 27
Cl86

and the resisior R 140.

is infroduced fo form a

is a compound

This circuit

connected stage
has a high

Ql08

and

Ql09

(emitter

obtained by

from the emitter

dB in the medium range

30

the high

of

of

frequency response is

by the capacitor C\22. The

forms the high fre-

is obtained by the capa-

part

the high

of

is connecfed
is connected

follower).

fhe negative

Ql09

serial

ency response.
The equalization

knob, and correct

speeds will be

switch is linked fo the

speed selector

equalization for the different

obtained automatically

when fhe
speed is changed.
The componenis
The

speed equalization

the resistor Rl34

l7/a i.p.s.
stor Ri32 and fhe
The

output signal is fed to

potentiometer

ment

are referred to 7th i.p.s. tape

is obtained in 33/a i.p.s.

and the capacitor C124,

the equalization

is obtained by the resi-

capacitor Cl23.

the record current adiust.

Rl4 via the resistor R145.

and R9,

might

input

to the

the

of

reson-

frequ-

speed.

by

in speed

Fro

m

volume
con tro I

o_-_{

u rrr

|

t*

I68K

R

,ru

rot

123

5.1 M

,,$iTl/i\*i,".

5%

l*l^,2 I

qrzef33

c 181

1ov R

1K

Fig.

42.

nrrsl

I'.5-l Io,B- irltl

| 138
33K

R 131

120

-J--

22n

The

equolizing omplifier in record

186 C12?

c

p

68

position,

R 140

13K

Ojrr

c 129

2,5y

schemotic.

c 130

25tt

L

qn|"F

To

EAM 86

E

8ou

25V

0109

1078-

indicotor

t(n

',144

,IK

rcs

c

25v

To

rsord

curr odj.

pot

dB

tll

ttl
tll

L

100 200

Fig.

The response curves for the equolizing omplifier in record

43.

5.1.5 The

equalizing amplifier

in PLAYBACK

position

playback

The equalizing amplifier
shown in fig.

the following circuits.

ed by
The negative

to the emitter of

Ql09
response

playback

the
prox.

300 c/s. The

the

ed by

44. The
feedback circuit from

shown

in fig.45. The capacitor

curve in the

high frequency

resonance

serial

RI33. Cl86 is iniroduced
frequency
fier. The resistor

response

R206

of

in

playback

equalization

QI07,

forms the

range from 70 c/s to ap-

response is

Ll , C125, Rl36 and

circuit

to form a

playback

the

parallel

to the

and R'l40, forms the low frequency

500 1000 2000 s000

\

position

is

obtain-

the emitter of

playback

Cl28 forms

obtain-

part

equalizing

the high

of

ampli-

resistors Rl38

response, below

.a

position.

70
lations in

Cl3l is introduced

c/s.

the transistor

The components are

is

speed. The equalization switch
selector

knob, and correct equalization

rent speeds will be obtained

is changed.

speed
The

speed

Rl34 and

i.p.s. tape

33/+

equalization is obtained

Rl37

and capacitors

speed.

ln 17f e i.p.s. lhe speed equalizafion

the resistors

Rl32

and
c128.
The output signal

the

to
volume

output amplifier

control

from the

Rl.

to

Q109.

referred to 7Yz i.p.s.tape

R135, and capacitors

playback

via

the switche

t/a

37t

t

t

t

.a

10000 20000

prevent

is linked

transient oscil-

to the speed

for the diffe-

automatically

by the resistors

Cl24 and

is obtained

amplifier

Fl2 and

tl

(

when the

Cl28 in

by

Cl23 and

is fed

the

prespg.

p.

m

Dreo
0 104/0105

26

C119

R

123

,lp

R 201

68K

c12l

80p

5,1 M

+fR

f

BC 113 -

R 125

610

l,2K

Q

126

108

Equo I switch

R 131

120

c 181

4o

l,

R 129

1K

The equolizing omplifier in

Fig. 44.

c

17

124

n 5'1,

?h

Eouql swiich

5't.
15K

135

R

33

R 134

125

IJD

R

JJ

t%

96

c1

p

68

ploybock position, schemoiic.

R 140

43K

220K

R 141

c 130

25u

R 144

1K

*R

:^

tu ,1

ta.:

r30

c

131,

10^

+27\

R 1r.6

1,5 K

4

R 11',7

1K

To

volume

control.

(

dB

30

+

a

Hz

20

5.1.5 The equalizing
The

equalizing amplifier
shown in fig. 46.
nected from
Ql07

which decreases

50

A negative

emitter of

the

1

o

BCl

7l

\

100

Fig.45. The

amplifier in AMPUFIER

in

the

121

200

response

amplifier

feedback

to the

Ql09

amplif

xR

r2o t,z

QB}P

+ 25V

curves

position

circuit is

emifter of

ication approx.

r

R 128

10K

6

500

for the

position

is

con-

130

c

2,5

\-..--

1000 2000

equolizing omplifier in

34 dB. Cl3l is

lations in the transistor

The signal is fed

Al3. The frequency
fier in AMPLIFIER
ra n9e.

R 141
220K

ploybock position.

introduced to

to the

80

tr

25Y

]-t

109

Q

BC

107V

s000

Q109.

power

response

position

*n

rae

130

I

J%

J

10000 20000

prevent

amplifier

of the

is flat within

transient

via the

equalizing ampli-

+27

\

/z

the

oscil-

switch

audio

From

volumeH

control

=

t

-I

:

123

R

119

c

Q1t,
R 201

68K

5,1 M

R'r25

620

Fig.

46.

181

c

4op

R 129

1K

The equolizing omplifier

L

182

c

10K

25p

R 144

1K

R 130

in omplifier posilion. schemqtic,

IJq

c

10n

R

146

135r

E

R 1/.7

1K

power

To

omp.

5.1.7

The power

power

The

output
class B.
emitter
The
tary
rent
The
is adiusted

The treble

stage

Q30l

connection

phase

transistors

of

Q305 and

center

output

output

inverler

voltage

by R305.

and

amplifier

is

a single

and

Q302 are connected

and

stage

Q3O3

Q306 is adiusred

of the

bass

R

30t

t0K

amplifier

is

shown

ended push-pull

drives

the

inverter

consists

and

iransistors

conlrols

305

c

l00u R 308

35V

Q304.

are

*

of the

The

by means

1K

in fig.

amplifier

in

stage.

.o-[l.m"n-

quiescent

e305 and

obtained

47.

The

common

cur_

of R3.l0.

e306

bv

the

frequency
the
The

treble
with
The
stage
and

temperature

nal

is fed

dependent

output

poientiometer

Q306

of the

control

C303

forms

temperature

Q3O3

is

to

\N JIU

negative

amplifier

R4

together

while

the potentiometer

the

bass

stabiiizing

and

Q304

obtained
coefficient
the

by

speaker

feedback

to

the

control.

of the

and

the

the

NTC

resistor)

(left

channel)

circuit

emitter

with C3O2

R5

phase

ourput

R3l

stage

resistor

l. The

via

from

of

e301.

forms

together

inverter

e305

(negative

output

C3Og.

the

sig_

I

I

q

c

301

2,5 p

FROM

VOTUME

CONTROL

R

310

Fig.

47. The power

R

3t3

AASS

TREELE

outpui

o 304

AC 128

cmplif

Q 305

A0

14v

ffi

)

o

AD

ier,

schemolic.

150

til

306

I5O

314

200

+27U

R

3p

317

82

5W

CENTER

R 316

CHANNET

I

I

(

{

n

I

28

5.1.8 The

The

fig.48.

in

transistor

Both transisfors
connection.
The bias voltage

the
Cl I3

stabilizing
fhe collector
quency

I

I

high frequency signals. The signal
via CI18, the contacts
Q106.

The frequency response

is f lat

playback

schematic

The

amplifier

resistor Rl l8

works as

negative

independent. Cl 14 is a filter

from 40 c/s to

pre-amplifier

for

of

playback pre-amplifier

the

playback pre-amplifier

consisting

are connected

transistor

of the

which is connected

a filter for high frequency signals. The

feed

to the emitter of

Ql05

Gl2

of the

20

000 c/s.

of

Ql04

common

in

Ql04

across Ri22.

Rl l7 and Cl 14 from

back

from

and

C]19, to

playback

is

shown

is a two stage

and

Q105.

emitter

is obtained by

is fre-

Ql04

capacitor

is fed

Ql05

the

base of

pre-amplifier

for

FROM

Q

BASE

109

+250V

605

c

8op

OF

=

R

502

100

:

D

601

K

EAM 86

601

,01

R

603

't50

1W

K

c 602

,02?|)

+

Fig. 49. The indicqtor circuit, schemofic.

=

*

1lt

)L

''

R fi6

6EK

I

o 104

t09 B

BC

+

J|

^^^ t

l

I

,I
Ef'rnor.,,

clt3

rooop=

-''
K

s,t

r

*nife

zzot

t

JravB. HEAD

=

f ir-s

5V

10s

o

109

BC

c l't8

R

121

3,9 K

TO PLAY

EoUAL.AME

u202

5.1.9 The

B

B.

The
shown
triode
circuit is
tiometer
The
sisting

D601.
cuit R604
grid
The

nals. The
to

close at a recording
distortion
back.

record

schemaiic

in tig.49. The EAM86

and

signal is rectified

of the diode section

The DC signal

the

of

capacitor C605 is

for

indicator

connected to the

R60.|.

and C602, and is then connected to
triode amplif ier section.

record level indicator

from a recorded tape

indicator

level

ihe record level indicator

tube.

bye

is f iltered by the damping

a filter capacitor for

level corresponding

circuil

is a combined rectifier,

The input

center-tap of the

the

double

of EAMB6

is adiusted

(400

the

of

c/s), when

indicator

rectifier,

together

by

circuit is

poten-

con-

with

cir-

the

H.F. sig-

R60 I

to 5%

played

Fig,

The ploybock pre-omplifier,

48.

schemolic.

29

5.1.10

The oscillator,

The schematic
The

oscillator

is of the

bias and erase circuit

for the

oscillator

push-pull

is shown in fig.50.

using two tran-

type,

sistorsQll0andQlll.

of

the trans-

the

oscillator

The DC

supply

is fed to the center-tap of
former T3. Variation
oscillator, caused by

the

of

output

the variation

voltage from

load between monaural and stereo recording,

TO PLAY8. PRE-

AMP L IFIER

cH'l

RECORD

HEAD

PLAYB,
TYPE

CH1

ERASE
TYPE

40H

HEAD

/.1

H

(39H

14 BIAS

C

12p

(34H)

)

ADJ,

c10

l0

-60p
cl12{

u6onI

is

1/.9

R

330

(100)

the

com-

pensated

by the dummy load

The oscillator

frequency is adiusted fo 85,5 kc/s by

Ri

48, Cll2 and

the trimming capacitor Cl20. The bias current
the oscillator

to the record heads, is adiusted by the
trimming capacitors Cl0 and Cl l.
The schematic shown

in fig.

is valid for the four-

50

track version, while the figures mentioned in

given

thesis are

Ref. modification list

L3

t

385

b

for the two-lrack version.

para

5.9.

:85,5 kc/s

Fo

110

Q

gt2

u 28t

R 149

(1

00)
150

R

130

(

100)

c

11,

'

l41

5000

R151

L tqt

5000p

p

43K

11't

C 143 C1t

1000p 1000p

13.
from

paran-

t,

4

RECORD

PLAYB. HEAD
TYPE

5.1.1 | The
The schematic for the

The

by the three transistors
zener
Ql

load increases,

AND

4OH

power

stabilizing of

D501.

diode

TO

supply

power

the line volfage

PRE=

PLAYB.

supply is shown

Ql, Q50

Fig.50,

(+27V)

I

and

works as a variable resistor. When

impedance

the

transistor

of

the line voltage

decrease to stabilize the line voltage.

connecfed amplifier

variations

using the zener diode D50 l as

controlled

by lhe line voltage

reference.
The

signal is inverted in

Q501.

age

will disappear

impedance

tifier.

Q50l

is controlled by

Ql

is shortcircuited the emitter-bias current of

When

of

the

(R504

Ql

grounded).

is

to increase thus

shortcircuit

will again control

and fed

Q502

When the line volt-

Q501.

This will cause
protecting the rec-

is removed, the transistor

due to a slight

Ql

The oscilloior. erqse

in f ig.5l .

is obtained

and the

Q502

will

Q1

is a DC

Q502

a voltage

to the base

of

Q50

I

the

"starting-

? :rtT

t 2'1\

T

117

c

300p

(

1000)

ond bios circuit,

schemotic.

up" emitter-base current obtained bv
directly

to the rectifier. This emitter-bias current is
very low and insignificant
maximum current available from
ed by the
maximum
C503

resistor R501. By increasing this resistor

available current will decrease.

is installed to
diode. The capacitor C50l is introduced to
transient
The N.T.C.
is introduced to

.l65

The

I lations.

osci

(negative

volt secondary winding is connected to the
rectifier 8250 and furnishes fhe high voltage to
indicator tubes EAM86 and the motor. The 32 volts
secondary

winding is
and furnishes all the line voltages io the fransistor
boards. The

6,3 volt secondary winding furnishes the

AC filamenl voltage to

120

c

50- 250p

-750)

(1

s0

R503

for the control

prevent

noise from the zener

the

process.

rectif ier is limit-

temperature coefficient) resistor

prevent

thermical run-away.

connected

the

to the rectifier B40

indicator tubes

EAM86.

connected

prevent

(

The

the

30

c3

2

500y
64Y

+

45V

5

501

+250

1"'&t

)

i

501

1,8

R

820

2Vt

Q1

I 3030

ft

0

u 28181

V

s 503

s01

2

2,5

+27

Y

R

506

5,1

R

507

510

K

D

50r

Bzx

25

5V

v

'Q

502

u

2818

l2

R

505

IK

5.2

THE

Ref.

block

5.2.1
The

function

Ch.2).

@;i,

MOTOR

60 c/s

SWITCHING

diagram

The

function

selector

Each

of the

TAPE

SWITCH

=

Cl

;

SYSTEM

fig.

39.

selector

switch
levers

END

1,1;1

switch

has

two

has

R7

5t

OPR.

SWITCH

levers (Ch.

the

following

LEV.

Fig.5l.

The power

I and

three

?-

l,

Llr__

supply,

schemofic.

positions,
vers

can

tem

has

lever

and

switch

to

3_J____El

RECORD,

be

operated,individually.

been

the

prevent

PLAYBACK

introduced

two

levers

unintentional

between

for

___lt

INTER

and

the

erasure.

TR.

LOC

AMp.

The

An

interlock

lhe

function

N0,286

OFF

K

two

le_

sys-

operating

seteclor

5.2.2

lhe

The

fig.

back

position.

EXT:

External

ch.

2:

right

EXT

* INT:

left

speakers,

INT:

f nfernal

right

speaker.

CH

l,

EXT,

nected

ch.2

is

CH2,

EXT,

nected

ch. I

is connected

speaker

52

shows the

selector

The

switch has

speaker

speakers

speaker.

External

ch.2.

speakers

CH2,

to

both

connected

CH

and internal

right

INT: The

external

to

both internal

l,

INT:

only.

The

to both gxternal

to

both internal

switch

selector

five

only.

Ch.

speakers.

Ch.

l: left

ouiput

speakers.

output

speakers.

switch

positions.

I :

left

speakers.

speaker,

from

ch. I is

The

output

speakers.

from

ch.2

The

output

speakers.

play-

in

speaker,

Ch. I :

ch.2,

con-

from

is

con-

from

F

POWER

OUTPUT

AMPLiFiER

cH. l

R

3tz

82

ROM

NII,

l-o-

t^

t-"-

NI POSiTiONS

R

dt

R

32

16
3,9
5w

210

=

I

Kt L

2=PLAYB
3=AMP

Nole:

The

resistors
82
put

for

is

being
output
speaker
speaker
circuited
when
PLAYBACK

5.2.3
Ref.

We presume
track).
ch.
RECORD
position

The
ch.
ing

the
erase
The
with
nal

this

The
nected

ch.
to

the

amplifier

(ch.

ohms

2) are

of the power

switch

is in RECORD

recorded

through

terminals,

selector

the

by

fhe

funciion

or AMP

Monaural

block

diagram

thai

The

input

l.

The function

and the

AMP.

signal

I

amplifier

record

resistor

will be

and via

head

the

internal

passes

the

via

head.

ch.

R2 lO

monitored

speaker.

input

of the

to

the

l.

The

power

internal

controlled
The procedure
exactly
function
and
tion

the

same

selector

the

function

RECORD.

32

-

R210

connected

amplifiers,

will be

the

depending

switch. R2

mode

selecfor
position.

recording

fig.

we are

signal is

selector

function

The

speaker

through

volume

the record

The

I

are

both activated.

(B2

speaker

equalizing

output

output

speaker

by the

for

monaural

as

explained

switch

selector

82

ohms

when the

position.

monitored

internal

l0 and

switches,

switches

on ch. I

39.
recording

fed

to the

switch

selector

selector

the record

control

current

record

level

ohms)

ch. I and

with a

reduced

amplifier

from

the

amplifier

ch. 2.

Ch.2

volume
recording

ch.

i is

switch

(ch.

in

series

l) and

with

R2l
the

function

programme

The

with

a

reduced

speaker

the position

on

Nl-2-3

or external

R2l

I are

and Nll-2-3

are

moved

or ch.2

on ch.

(upper

I
microphone
ch. I

is in
switch
is

set

ch. 2

to

pos.

pre-amplifier

the

of

record

equaliz-

potenfiomeier

indicator

is

connected

and

in

the recording

output

thr

ch. 2 is

record

pre-amplifier

ch.2

is

is

operated

connected

control

on ch.

above

except

that

sef to AMp position

ch. 2 is

set to

-

I
out-

selec-

thaf

the

of

short-

to

iack

pos.

is in

lNT.

to

the

series

sig-

uqh

con-

as an

ch.2.

2 is

ihe

posi-

417

R

82

o--.-

POWER

A

M

NO

12

-

o

J

)

trJ

N0.6318-3

SPEAXER

E LECTOR

5

F

ROM

OUTpUT

p

L

F i

i

iR

cH.2

6318-3

1

-.

Fig.

52. The

U

:

E

*

]

o

J

lrJ

R17

,5

N

II

speoker

LEFT

HANN

C

F

?

EL

SPEAKER

cHl

:

CENTER

CHANN

E L

SPEAKER

:

RI

GHT

HANNEL

C

Z=4n

=

P05lTlONS:

R

82

selecfor switch,

'l
2

3=AMP

211

CH 2

g

g

=

ft

=

PLAYB

schemotic.

(

(

C

Mixing during monaural recording

5.2.4
Ref.

block diagram fig. 39.

presume

We

I

and 2) is to be recorded on channel I

Programme I

programme
The

outputs from the iwo record
connected in
switch ch. I is set to
tion

selector switch ch. 2 is set to
two programmes
equalizing
record
and the input
position
record
amplifier
when the
The mixed
both internal
the speaker ch. l. The
speaker ch.2 is controlled by the volume control

ch.2.

procedure

The
on ch.2 is the
tion

selector switch ch. I in

function

NOTE:

5.2.5 Stereo recording

Ref.

block diagram fig. 39.
The

two function selector swifches
are set to
switch

The two signals

record pre-amplifier
to the record heads.
The

connection between the outputs from

pre-amplifiers

the

of

in

stereo

The internal speakers

in

series with

power
cording

5.2. 6 Monaural

Ref

. block diagram f ig. 39.

presume

We

back from ch. l.

The function

PLAYBACK and the function selector

to positron AMP.

set

INT.
The output from the
connected to ihe
fier ch. l. The output from the
amplifier

amplifier ch. I and to the input of the equalizing
amplif ier ch. 2 in amplif ier
fed to the
gramme

that the mixed

is connected to the line input ch. I and

2 is connected to the

parallel

position

are mixed and fed to the record

amplif ier and the record head ch. l. The

gain

is controlled by the volume

the equalizing amplifier in amplifier

of

ch.2 is

equalizing amplifier ch. l. The

selector switch ch. 2 in

The line inputs are disconnected when the
corresponding

to lNT.

record equalizing amplifiers are disconnected

recording.

output amplifiers. We are monitoring the re-

signal with a reduced output.

connected

ch. 2 is connected fo the internal speaker

speaker switch is set

programme

speakers with a reduced output through

for recording the mixed

as

same

RECORD

ch. I is connected

power

will be reproduced through both internal

position

(ch.

I and ch. 2)

and record equalizing amplifier

and the

R2

l0 and

playback,

that the recorded

selector switch ch. I is set to oosition

The speaker switch is in

input of

output

programme

line input ch.2.

when the funciion

RECORD and

parallel

to position

will be monitored through

outpuf

outlined above, with the func-

microphone

connection

(ch.

playback pre-amplifier

gain

position

position

and the speaker selector

between the inputs

I and ch.2) are connecied

R2

ll to the ouiput of the

channel f

programme

playback

playback

to

position,

amplifier ch. 2. The

(programme

(upper

preamplifiers

position

to

the input of the

power

of

AMP and the

plug

is inseried.

(ch.

pass

through each

2

or

switch ch.

equalizing ampli-

power

the

the signal is then

track).

selector

func-

the

AMP. The

control ch. l

outpuf

lNT.

fhe internal

programme

RECORD.

i and ch. 2)

the record

played

is

position

ch. I is

equalizing

output

are

2 is

pro-

speakers, and through both
na ts.

procedure

The
same as explained above except that the
selector switch ch. I is
tion selector

5.2.7 Stereo
Ref.

block diagram fig.

Both function

position

set to

position

to

sef
puts

of the record

The

signals will
playback
amplifier.
through
amp

5.2.8 Stereo amplifier
Ref. block
The function

position

to
amplifier, equalizing amplifier
amplifier.
The connection between the
izing amplifiers
controlled by the volume
lower knob ch.2).

5.2.9 Add a lrack
Ref . block
The
back a
and record anolher
at

the same time. Both
simultaneously
stereo. We

is recorded
ch. I is set to
selector switch is set
pass
izing
fed to the internal
equalizing amplifier is
made
nected to either
boih.
The function selector
position.
are connected and the
equalizing amplifier and is fed to

ch.2.
The recording
nal

The
language
Language

"add

prerecorded
back, listen to the
exercises. The

equalizing amplifier

The stereo

both internal

output terminals.

diagram f ig. 39.

AMP. The signals

The signals are then fed to the

diagram f ig. 39.

a track" recording is a technique

"add

pre-recorded programme

presume

playback pre-amplifier,

the

amplifier and

on ch. 2 and

The outputs from the record

speaker ch. 2 with a reduced

a frack" recording used

"add

teaching

teaching is a

a track" recording,

playback

for

switch ch. 2 is set to oosition PLAYBACK.

playback

39.

selector switches

PLAYBACK

lNT. The connection between the

pre-amplifiers

pass

programme

speakers and through boih

selector switches ch. i and ch.2 are

is disconnected. The

programme

when the tape is

that the

on ch. l The function selector

position

to

the power

speaker ch. l. The

the recording

the input terminals

of

switch

signal is

the tape

on

lesson, monitor and record his

playback

pre-amp

from ch. 2 is exactly the

to AMP

set

(ch.

the

and

playback pre-amplifier,

each

pass

outpuis from the equal-

controls

on

programmes

pre-recorded programme

PLAYBACK, and the

position

oufput

operative. The recording is

ch. 2

signal

monitored

typical example of

the lesson

and the student can

must

be in stereo, and the

output

position

I and ch.2) are

speaker switch is

is disconnected.

power

and

played

be

will

each record

power

and

output

(upper

from

lNT. The
the

signal may be con-

passes

through the inter-

output.

for

knob ch. l,

of

one

the

other channel

will be heard

played

signal will

playback

amplifier

ch. 1, ch.2 or

is sef to

pre-amplifiers

the record

the record head

the

(master

fermi-

funciion

and func-

out-

output

back

pre-

set

pre-

outpul

speakers.

gain

is

playing

channel,

back

in

switch

speaker

equal-

and

playback

RECORD

use of

track) is

play-

own

33

master track is
and the
can be heard in two
the
able
with no inlerference to the master track.

Procedure
We

is
selector switch ch. I to
the
voice will be

nected lo the

recorder is

per

dent's voice is made
funciion selector

simultaneously with fhe
to normal

cording

knob.

earphones with the volume determined

ing level.

Rewind the

function selector

playback).

set

The

gramme

possible

level, for

tween the

will

5.2.10
Ref. block

Sound on
gramme
taneously
grammes
(One

playback
mono.

on

In
ing
however
by many
The
sound

sludent's

center channel

record

to

presume

recorded

speaker

volur:re

is

The

individually

operation will be

to use the

decide the

Sound

superimposed

ln

two

separate tracks the

<<sound

up a complete

series

recordings.

then reproduced

track from the

loudspeakers or

in

the earphones.

and erase

that

the

ch.

on

started.

control

forward drive

adiusted

student will monitor

recorded tape and

The levels from the two channels can be

is

recorded on ch. 2

language studing

internal

diagram fig. 39.

sound

played

is

a second programme

being recorded combined

of
<add

on soundr> one has the

the
re-recordings.

12 has

I

selecior swifch

heard

center channel output,

The

switch ch.2 to

levers in

with the volume confrol knobs.

internal
loudspeakers

maximum

on sound

recording

the

combined

a track>

programme

sound

limited

These taperecorders are

his

pre-recorded

(upper

<PLAYBACK))

in the earphones,

level is adiusted wilh the

knob. The

ch.

on

operating

position.

the lower volume control

with

analogical

level applicable.

is a technique where a pro-

back from

on the other.) Consequently

where two

playback

quality

from

one

other. The

mixed through

The

own exercise at will,

master

track).

fo

2

pos.

loudspeakers, at a limited

groups.

programme

may be slightly

possibilities

Set the funclion

position,

<EXT>.

which

when the

recording of ihe

(lower

play

(lower

one

is added, lhe two pro-

from

track).

(RECORD>

lever being

level

The

his

own

by

it back

<PLAYBACK>

the master

if

track).

The feedback

and the microphone

track and

on another track.

programmes

must be

possibility

separate sources,

for

channel,

playback

siudent

programme

master's

The

are con-

tape

Set the

position

moved

the re-

of

in ihe

voice

the record-

both

with

(stereo

is

lt

simul-

must

be in

in stereo.

build-

of

reduced

sound on

equipped

with combined record
will always be some magnetic coupling between the
head

is

When the sound
output

inpuf

tion from the

is

too

will

cause instability and oscillations. The

71/z i.p.s. is recommended for this

and

sound
on a taperecorder

heads, i.e. Tandberg

62. lf in

up-

sound
the

stu-

pro­also

be-

fhe

are

oscillation limit is

below this limit.
Preferred

presume

We
corded
connected to the
speaker selector
function
tion

and the
ward drive.
to

PLAYBACK

The volume

maximum

fhe

sfart-slop
lume control
cording and the tape
ing level for
touched during the actual

lever

stop
crease
knob) up to
record

pre-recorded

The
through
equalizing amplifier
fier.

The signal is fed to ihe line
strap.
are interconnecfed. The

programme

the
are bolh fed to
amplifier
when
sound on sound recording with fhe function
switch ch.2 in
back ch. 2).

is

which

from

of ihe recording channel. lf the

great

recordings

on

on

the setting

level indicator

The two

the

recording and the head

on

playback

the

playback

the feedback between

can

with separate record and

spiie of this,

the

series

instruction

that

the

ch. l. The

line input ch. I

switch

selector

the

and the record head ch. 2. Rewind the tape

switch

operating lever is moved to normal for-

The function selector

position.

control ch.2

recording level

lever in STOP

ch. I set to minimum.
ch. 2 is now

to left

recording is

position

of

point

a

iust

programme

playback pre-amplifier

outputs from the

from the record

the input

PLAYBACK position

playback

and

sound

only
Tape Recorder

12, you

and keep

for sound

pre-recorded

power

the volume

and to the

recording is made,

channel

head to the recording head

be completely

you

wish io

must first f ind

output

is

set to EXT

ch. 2 is

(lower

from the microphone with

position

is not moving. The record-

pre-set
recording. Move the

and start

below complete closing

(the

ch.2

pre-recorded programme

of

compleied, and

heads, and there

is connected to

loop amplifica-

the two

purpose.

Models

record

your

volume

sound recording

on

programme

terminals

by a strap.

lo

set

switch ch. I is

knob) is adjusted io

and with

The is a lesf

and

the recording. In-

confrol ch.

point

on ch. I is

and

power

input ch. 2 by

record

pre-amplifier

record

the

(monaural

playing

position.

RECORD

should not be

of instability).

ihe

oulput

pre-amplifiers

play

back.

the
the

heads

tape speed

Sound

satisfactory

sound on

out

played

equalizing

on

playback

64 and

where

controls

re-

is

ch. I is

The
The

posi-

set

lhe vo-

re-

start-

(upper

I

the

of

back

playback

ampli-

rhe

and

ch.2

back fhe

selector

play-

,n

(

(

5.3 HEAD AI.IGNMENT AND TRACK
WITH

5.3.1 The models

'I

.

Demagnetize the heads and ihe adiacent paris
fore

2. Move the

with a tight tape inserted.
tion
tape
guide.Ref.fig.

34

TANDBERG IEST

l2-4 and l2-2

aligning

of

runs

the heads.

operafing

the adiustable tape

equidistant from the f langes

lever to normal

Align the vertical

ll.

guide

CONTROL

TAPES

forward drive

(79.3i)

until the

the tape

of

be-

posi-

Play back the
pre-recorded
i.p.s. tape
corresponding to
the height
until minimum
from track

4.

Play back the test
pre-recorded
speed. Adiust the

test tape No. 1. This is a full track

tape

with 1000 c/s recorded at

speed.

of the combined record/playback head

3.
tape

record

The

track 3 is reduced 30 dB. Adiust

output is

tape No.2.

with I 0

azimuth

level of

obtained on

000 c

position

ihe

This

is a full track

7th

at

ls

of

7Vz

area

exact

a VTVM

i.p.s. tape

the com-

bined
ing

is obtained

ter

5.4.3

5.

Play

pre-recorded

-

25O

recorded
forms
rance
in level
than

3

6.

The

erase head
where
for the
sert the
signal from

record/playback

on both

for

lateral adiustment.

back

fhe test

t0

000

at

with

the N.A.B.

{-

is

2

between

dB at any

approx.

upper

test iape

tape

tape

with the

-

5000

7Yz

i.p.s. tape

dB for all

the

frequency.

is set

0,25 mm

track

is visible

No.9,

generaior

the

head

until

output

No.3.

-

i000

standards.

frequencies.

two

in a

(.0.l")

meiers.

This

following

-

i00

speed.

channels

preliminary

of the ferrite

above

and

record

on channel

maximum

Ref.

is a

full track

frequencies:

-

50 - 250

The

tape

The

output tole-

The

difference

should

position

the tape.

a

tObO

(track

2

read-

chap-

cls

con-

be less

core

In-

c/s

3)

at maximum

Magna-See

track

is

height position

Make

sure

part

of the

lateral

adiustment.

7. Ref.

5.3.2
All
for the
graphs

instruction

the

chapiers

bias

and the

The

model

the

alignments

model

3 and

instruction

recording

solution

in center

of the

that the

neighbour

5.7.1 I

recording

l2-2

specif ied

i

2-2

6. Paragraph

5.6.2,

and

5.6.1.

level.

Dip

and

check

that the

of the erased

erase

head

erase

head

does not

track. Ref

and

with the

paragraph

.I0

5.7.

current.

in

chapter

exeption

3 is

superceded

6 is

the tape

re-recorded

area.

Adiust

if necessary.

erase

.

chapter

for

5.4.4

settinq

5.3.1

are valid

of the para-

superceded

into

the
the

any

for

of the

by the

by

G

5.4 HEAD

5.4.1 Demagnetizing
Demagnetize

aligning

5.4.2 The

Ref.

fig. I l.

The

adiustable
Move
with a tighf

the

of
runs

equidistant

The

adiustable

Move

a

tight
adjustable
distant

5.4.3
The

height

The

height

the

height

edge

of the tape

of the

for

track

The

azimuth

Play

back

VTVM

minal.

the position

iust

azimuth
reading

The

lateral

Pull

the pressure
when
played
more

than
cord/playback
mounting plate.

ATIGNMENT

W I T

H O U

T TANDBERG

fhe

heads

the heads.

adiustable

tape

the

operating

tape

inserted.

adiustable

the

operating

tape inserted.

tape

from

The

record/playback

alignment:

of the record/playback

adiustment

airgap

control

a
connected
Set the

justment

ad

is

obtained

alignment:

the standard

back.

3 dB.

tape

from

tape

lever

guide (79.3.l)

the flanges

shall

for ch.

of the record/playback

alignment:

standard

to each

speaker

of the

on the

pad

The

output

Adiust

head,

TEST

and adiacents parts

guides

fape

guide

79.1 5:

lever fo

the

guide

Align

screws,

run flush

l. Ref.

azimuth

switch to position

record/playback

screw,

away

azimuth

the lateral

if necessary,

normal

Align

the

(79.15)

guide

flanges

79.31

:

to normal

the vertical

until

of the

tape

head

ref

.

with the

chapters

alignment

external

ref . f ig.

output meters.

level

speaker

from

alignment

should

by turning

TAPES

forward

vertical

unril

of the tape

forward

the tape

guide.

head
f ig.

I l,

the

position

position

is aligned

I i. The

upper part

5.5..t

and

head.

tape

output

uExirr.

head

until

erasure

tape

noi

drive

runs

maximum

is

decrease

of the re-

the head

before

drive

posilion

the

tape

guide.

with

the

of

equi-

by

upper

5.6.2,

with a

ter-

Ad-

by the

head

being

5.4.4

The
The
The
adiustment
(.0

l")

erase

chapters

head.

The
Align
azimuth

parallel

position
The

Turn

the

front

pad.

5.5

5.5.1
Record
at

maximum

function

approx.5
similar recording
dip

(Magna-See)

between
equidistani
tion,

5.5.2
Insert
c/s

signal

level
(RECORD>

Magna-See

is in
position

erase head
height
height

azimuth

lateral

it into

the

alignment:

of the

screws.

of the

head,

the

the head

TRACK

W I T

The

if

necessary,

The

a full-track

on

ferrite

should

5.5.2

and

alignment:

azimuth position
adiustment
to

the upper

of the

erase head

alignment:

mounting

of the

CONTROI,

H O U

record/playback

.|000

a

center

of the

c/s

recording

selector

seconds.

a mixture

to

make

the

recorded

across

erase

from a generator

track

3

position).

solution.

of the erased

erase head,

erase

head

Ref.

fig.

core

for

be visible

5.6.i,

for track

of

screw.

head

T TANDBERG

signal

switches

Turn the

on track

the tape.

and

head

pre-recorded

(the

Check

The

mounting

is

plate

parallel

is

MODET

head

in stereo

level,

in

4

of iron powder

the

recording

tracks

Readiust

recheck

function

Cut

the

that

if necessary.

is aligned

ll.

the upper

above

the

erase

not

critical.

for

TEST

on track

<RECORD>

tape

and 2.

should

the

tape

at maximum

selector

tape and

the re-recorded

area.

by

Approx.

the

control

erase

head

plate.

the

erase head

to the

I2-4

TAPES

from

j

around

Cut the

visible.

be distributed

the

azimuth

and

record

switch

dip

Adiust

the height

0.25 mm

track

of the erase

head

The azimuth

felt pressure

a

and

position),

and

and

The

height

alignment.

it into

the vertical

the

of

tape. Ref.

by the

shouid be

until

generator

(both

3

for

make a

fape

and

alcohol

spaces

posi-

a lO00

recording

ch.2 in

the

irack

35

5.6 TRACK. CONTROI,. MODEL. | 2-2
W I T H

5.6.t The erase head

The

height of
ad[ustment
equidistant from the

ferrile core.

For

the azimuth and lateral aliqnments ref.

5.4.4.

The

5.6.2
The height
the

height adlustment

l00O c/s
switches are set to
cording level
tape in the Magna-See solution and check that the

tracks are

that the
the

erased zone.
if necessary.
For the

5.4.3.

5.7 ELECTRICAT ADJUSTMENTS FOR TANDBERG
TAPE RECORDER MODETS

5.7.1 Adiuslmenls of the
Connect

put

ch. I

A 4

ohms,
external
VTVM and an

Set both funcfion selector

(stereo
R2
selector to
Set the bass

5.7.2
clipping

meter R305

clipping

is
until the

read min.
between

5.7.3
Set
zero. Connect a mA-meier in series with *
supply
wire
ch. 2)

5.7.4 Adiuslmenl of rhe FM MX-filter.
Connect the
described under oara. 5.7..|.
Adiusr the output of the audio
VTVM
switch
Set the

amplifier). The

-

ch. 2 should be

Adlustmenl

Increase the output level from

obtained.

Decrease the

i0

watts

Quiescenl

the volume control

(ch.2

fo

to position

O U T TANDBERG

the

erase head is

screws.

record/playback

of
signal in

on a

distributed symmetrical across the tape, and

pre-recorded

azimuth

the audio

(ch.2)

l5

output

position

controls

occurs

-

the positive and the

of

clipping

6,3 volts

in 4

ohms).

two

the

to

the

red

mA.

35

test

reads

generator

Ref. fig. ll.

upper and

the record/playback

screws

stereo

<RECORD>

full

track

zone remains in

Readiust the

the lateral

and

generator

and

set

watfs load

terminals ch. I

oscilloscope

volume controls Rl - ch. I and

sef to

EXT.

and the treble controls

of the output level

on the scope.

(R405

I

ch.

output level from the

disappears. The VTVM

for

both channels

The tolerance

channels

currenl

Rl

power

lV at ]000 c/s. Set the FM MX-filter

output amplifier for ch. i, red

wire). Adiusi

equipment

ON.
to l9Kc/s and adiust

TEST TAPES
aligned
the lower

head

ref. f ig.

(bofh

pos.),

pre-recorded

erase and record heads,

aliqnmenl ref .

power

fo the HIGH LEVEL in-

the

frequency to 1000 c/s.

resistor

parallel

switches

max. and

Adiust the

-

ch. 2) until symmetrical

negative

is

2 dB.

-

ch. I and R2 - ch.2 to

R3l0

to

the

by the height

tape

The

head is aligned

function

I2_4 AND I2_2

output amplifier

is connected to

(ch.2).

the load resistor.
to

the

audio

of

-

tape recorder as

generator

shall

edge of

Record

I |.

at maximum re-

iape.

the center of

Connect a

position

the speaker

generator

potentio-

half-periods

generator

should

(corresponds

the

oulput

27

(R410

I

ch.

until

-

L4

ch.

run

the

chapter

by

a

selector

the

Dip

chapter

the

AMP.

zero.

lo

untii

then

to

level

volts

-

the

(15

I

-

2) to min. deflection

ch.

tion between

l9Kc/s should

justment

The

ad

FM-MX

19
which should
signal
be more than I B dB.

5.7.5
Connect the test

described under
switch
audio
The frequency

5.7.6
The audio
level from the
reads
corder

I00
should

5.7.7
The audio
level from
reads
corder down to

10000c/s, lhe
should now

5,7.8 Adiuslment of the
Connections:

Connecf

ch. I

Connect the VTVM to

ch. I

Set both
(stereo

position
i.P's.
A 100
upper

(red
trols to
cuiting

5.7.9 The
Set the
output level
50 mV.
Adiust R601 - ch. I
tronic

5.7.1O The
Connect
series with the record head. Adiusr

­(The

l8

filter

kc/s filter except for the

level between I000

Control
position

to position

generator

The bass

generator

500 mV. Turn the bass control

to

up

c/s, the

now

lhe lreble control

generator
the

mV.

500

electronic beam indicalor circuils

ihe

(ch.

2).

terminal24

function selector switches

record), and

normal forward

ohms

(lower)

wire ch. l, blue wire

postion

the

fhe secondary windings of

electronic

audio

beam

record currenl

the

ch.2) until

reading for the

mV.)

signal

the

more than 23 dB.

be

procedure

is

exactly

set ro 33,3 kc/s. The

be

the

of

frequency

equipment

para.

OFF.

until the VTVM reads

response:

control

is set to

generator

(pos.

max.

output

increase

decrease

audio

resislor is connected in

record/playback head

from

indicators are

VTVM

level from the tape recorder
approx.

is set to

generator

Turn the treble

(pos.

min.

output

approx.

generator

the wiper of the volume control

kh.2

move the operating lever to the

3. Siop the

beam

generator

generator

the

(R605

across

ihe

reading on the

ihe VTVM. The attenua-

on

levels at

aligning

for

lhe

same as outlined

generator

c/s and 33,3

response in

to

the

5.7..|. Set fhe

Adiust the

t2

is

6).

is

6).

level from the tape recorder

record

terminal 45).

drive

ch.2).

indicators

to

closing.

the

two-track model

output level of the

dB 30-16 000 c/s.

.I000c/s.

adiusted

Reset the

l0

dB.

1000c/s.

adiusted

control

Reset

l2

dB.

current and

fo the HIGH LEVEL

at the tape speed 7th

Sef lhe volume con-

oscillator

1000c/s

until

-

ch.2) until the elec-

.|00

1000c/s

tape

500

until the

on

until

on

the

to position REC

series with

to

the

oscillator

and

the VTVM reads

ohms resistor in

Rl4 - ch. l

VTVM is 13 mV.

and at

33,3 kc/s

the

for the

frequency

difference in

kc/s

should

AMP.

recorder as

FM MX-filter

mV.

The

ouiput

VTVM

the lape

generator

The

output

the VTVM

the tape re-

generator

the

input

the

ground

ch. I

by shortcir-

coil.

adiust

should be

the

(Rl5

re-

to

to

F

q

(

36

Fig.53. Bottom

view

of the

tope

recorder.

5.7.1|

Adluslmenl
and the

bias.

of the osc. frequency

Connections:
Connect the VTVM and a frequency meter
to a 100
playback
tion

selector

Adiust Cl20 until

and

Kc/s
reading for

Connect the VTVM across the
connected

ground

the

VTVM

on the
track version
to

be 85.5 kc/s and readiust Cl20 if necessarv.

resistor

ohms

head

switches

to

in series with the lower record/

ground

the frequency

(blue

REC pos.

to

wire). Set both func-

(s'fereo

meter

adiust Ci i until the VTVM reads

fwo-track version

the

in series with

(red

wire). Adiust Cl0 until the reading

the

shows 65 mV.

should be 95

mV.)

should be

.l00

ohms resistor now

record

upper
(The

reading for the two-

Check the frequency

in

recording).

shows 85,5

65

head

parallel

(The

mV

95

mV).

(ch.

Set

the function selector switch

tion

65.C KC/S.

Set the
position

RECORD
Connect the VTVM and
the

adiust L3 until the frequency meter

and

function

and

selector switch

the

position.

.l00

ohms resistor connected in

lower record head

85.5 kc/s + 2 kc/s.
L3 must be
deviation is
The

l)

bias

is + l0

%.

voltage

The

lf

readjusted

equal belween

tolerance between mono and stereo

HF voltage across the
be 80-l l0 volts. The
stereo is + l0

%.

2 to

function

the

ch.

selector switch ch.2

frequency meter

PLAYBACK

to

ch. I

PLAYBACK

series with

(ch.

2). Check

the

deviation is more

the

frequency to

than

to compromise so

ch.

I and

ch.

erase

2.

head

tolerance belween mono and

posi-

reads

to

across

the

be

2 kc/s,

that the

should

37

5.7.12 Distortion
Connect

described

Set

(stereo
HIGH LEVEL

frequency

position
electronic
recording
it back in
The distortion
tortion
must

Note: lf

5.7.13 Balance adiuslment
Use a full

tape no.3).

mode.
Adiust R20

the test

the

function

record).

3

stereo.

is above these

be

readiusted.

the record
the
therefore
tor

Connect a

para.

under

Connect the

inputs
to 400
and adiust

beam indicators

for about

should

bias and the

frequency.

track recorded tape

Set the

until bofh VTVM

equipment to the tape

I .

5.7.

selector switches to

ch. I and

c/s. Set the volume

the audio

2 min.

less

be

tolerances the

current is

oscillator frequency, recheck

both

VTVM to both

bias

the

tape recorder

recorder as

position

REC

generator

audio

ch. 2 and adiust

controls

generator

are closing,

Rewind

for

the

than 3-5

readiusted it will affect

settinq

pre-amp.

the

250 c/s

in stereo

pre-amplifier

have the

until

make

and

and play

tape

%. lf the dis-

record current

the

and

(Tandberg

same

oscilla-

outputs

playback

outputs.

reading.

to

5.7.14 Adiuslmeni
Ll and L2

Connect the

ch. I and

Set ihe

the

Adjust Ll-ch.

the

electronic

to

the

5.7.15

a

Connect the
puts

100
back
wires) ref. adiustment
tape
FM
Shoricircuit the
transformer

Tune the
level
level.

test

fig.
The tolerances
frequencies.
channels
Check

ch.2 and set the

speed

Control

ch. I and

ohms

head

recorder

MX-filter

from the

Check the frequency response

43.

should be less

the frequency response

the

of

equalization

generator

audio

selector switch

(12-ch.2)

1

beam

indicators.

lhe recording

of

generator

audio

ch.2. A VTVM is connected

resistors

(ch.

T3

generator

The difference in level

in

I and ch.2) to

in stereo recording

ro OFF.

secondary winding of

(Tl

on

to

generator

should be less

to the HIGH LEVEL

frequency to f: I

position

to

max.

to

curves

to

series wilh each

ground

the record

of

the

two-track version).

400 c/s and adiust the

20

below max.

dB

than

than 3 dB for all freouencies.

for

coils

inputs

c/s.

8 000

71/z

i.p.s.

deflection on

the HIGH LEVEL in-

record/play-

(red

current.

and switch the

the

according io

+2.5

between the two

all these

the

parallel

and blue

the

Set

oscillator

oulput

recording

dB for

all

speeds.

to

fil

4

38

Fig.

54. Front view

of

the

(

lope recorder.

5.7.16 Control
Insert

a

.l00

ohms

record/playback

playback
the

audio
resistor across
Connect

(ch.

head

generator

the

the VTVM and

outpufs ch. I and

switches

Set the

Use 400

to

PLAYBACK position

speaker selector

c/s as

0 dB

Check the frequency
according

Nofe:

to fig. 45.

Make

sure

by

overloading the
be less than
difference
be

less

than 3 dB.

ff

h EU./

PLAYD.-

HEAD

playback

of the

resistor

head

2) to

.l00

(ch.

ground

in

ohms

curves

in series with lhe upper

l) and the

(black

series with a

resistor ref . f ig.

a oscilloscope to PRE.AMP

ch. 2. Move the function

(stereo

position

switch

reference

response in

that

the

to

level.

signal

all

is not

input. The tolerance

+2.5

dB at all frequencies. The

between

TO

PLAYB. PRE A["4P

the two channels

lower record/

wire). Connect

.|00

kohms

55.
selector

playback).

EXT.

three

speeds

being clipped

should
should

AUDIO-

,GENERATOR

Turn down the

below

max. recording level

output level from the

spectrum from 40-.l6

Rewind
nected
speaker

the tape and

to both

swiich

preamp

position

in

selector switches in

frequency response

specif ications.

30-20
30-13 000
30- 7

The

difference in level

should be less

Increase
adiusting
bias

slightly if

iusting

Cl0

000 c/s

c/s

000 c/s

than 4 dB at

the bias

Cl0

slightly if the treble is too high by

(ch.

1) and Cl I

the treble response is too low

(ch.

l) and Cl I
Nofe:
Recheck
bias has

5.7.18
Connect the test
described under
which
resifor
and

ch. 2) with the

Set the

playback

The

that the VTVM

4OO

cls signal.

distoriion

the

been reduced.

Power

oulput conlrol

equipment to the lape recorder

para

should be connected across

connecfed

to the external speaker

speaker selector in EXT.

bass and treble

level is

reads I voit

Specifications as under

generator

and record the frequency

000 c/s at 71/z i.p.s. tape

play

it back with a VTVM con-

output

terminals

speed.

with the

EXT. and both function

position

PLAYBACK. Check the

for all speeds according

(t2

dB 40-16

(+2

dB 50-i0 000c/s)

(+2

dB

60- 5 000 c/s)

between the two

frequency.

any

(ch.2).

c/s)

000

channels

Decrease lhe

by

(ch.2).

according to

para.

5.7.1 if the

5.7.17 except for the VTVM
a 4 ohms, l5 watts

output

position.

controls

to

zero.

set by the colume control

playing

when

para.

back a

5.7.17.

20 dB

the

to

ad-

(ch.

as

I

so

fr

5.7.17 Control
Set both

(stereo
Insert

connected

function

recording)

good

a

to both

Fis.

55

the

of

toial

frequency

selector switches to REC.

and switch the

quality

tape.

line inputs

FM Mz-filter

The audio

and tuned to 400

response

position

generator

off.

is

c/s.

5.7.19
Insert
it through
in

to

The

Speed fest

a 144

the tape recorder

normal forward

pass

by the record head

speed tolerance

(45O")

cm

marked tape

with the operating lever

drive. The time for the taoe

should be'

7t/z

i.p.s:1 min.

33/.+ i.o.s.:2 min.

l'/e i.p.s.' 4 min.

should be

+2

section, and

section

at all

%

speeds.

run

5.8

ETECTRICAT

THE

MODEI. I2

MODIFICATIONS

TAPE RECORDER

INTRODUCED

TO

PART

Rl46-t2C
Rt47-t2C
Ri5l-l2c
Rl52-l2C
R200-l2c

R20r-l2c
R202-12C
R203-

1 2C

R302-

1 2C
R3 r5-I2C
R3r8-t2C

R3l9-l2C
R320-

I

2C
R402-t2C
R4l5-l2C
R4rB-l2C
R4l9-t2C
R420-t2C
R505-12C
R50Z-l2C
crSi-l2c

cI82-12C
cr

84-l2c

cr 85-r

2c
c304-t2c
c404-t2c
c504-l2c
c505-i
Qr
Qr

2c

05

r6

Q502

Modifications

Rec./playback

head

head

Erut"

ORIGINAL PART

3 Kohms

Kohms

3

100 Kohms

100 Kohms
100

33 Kohms

100 ohms

33

150 ohms
l0

i 50 ohms
l0 Kohms

47

100

.t

Y2W
VzW

1/+

ohms

%W

Kohms

y2W

Kohms

VzW

ohmsVzW 10

pF

ohms

250

V

y2W

.1pF250V20%

BCI t4
BCI r4
BCl

l3

introduced

38H
37H

10
10%

V2W
1/zW

W 5

yzW

VzW
VzW

YzW

20%

%

10
1O 7"

%

10%

5

%

lO

%

lO%

10

%

10

%

107"

%

1O%

to the

1.5

Kohms

1.5 Kohms

%

43 Kohms
43 Kohms

150

68 Kohms

l50
68 Kohms
82

ohms

7.5 Kohms
.47

ohm wirewoud

.47 ohm wirewoud

100
82

ohms VzW 1O

7.5

Kohms

.47

ohm wirewoud

.47

ohm wirewoud
100
I Kohm

510

40

pF

25

prF

40

wF

25

pF

2.5

pF

2.5

pF

.l

pF

.i

pF

BCr

098

BC

I 09B

u284812

four-track

lro,.

laru

NEW

PART

yz

W 10

1O

V2W

10

YzW
VzW 10

t/4

ohms
ohms

ohms

ohms
ohms

VzW

WW 5 %

YzW

V2W 10 %

VzW

thW

VzW

VzW

thw

y2W

2.5

V

l5-18

2.5

V

l5-18

-

64V

W 5 %

10
10

10

10

%

10

1O%

10 %

10

V

V

101100

64 V - 101100

250

V 20%

250 v

20%

(U2848/r)
version

%

%
%
%

%
%

%
3
3 W

%

%
3
3

%

MODIFIED

ABOVE

SERIAL

742326
742326
743026
743026
733228
744500
733228
744500
749500
749500

W

73305
73305
734001

749500

749500

W

73305

W

73305
734001
239500
739500
734501
73305
734501
73305
749500

%
%

749500

748700
748700
745500
745500
739500

NO.

I
I

r
r

r

I

fi

40

fr

5.9 MODIFICATIONS
TWO.TRACK

FROM

MODETS
The following changes have
the tape recorders

are modified from

two-track.

PART

Erase head
Rec./playb.

head

Osc. transformer

t7

ct

wtzv

\-tr+

moorLs r z-a

i

4tH
40H
T3

pF

300
50-250

ct5
R

148
R 149
Rt50

JJU ONMS

I30 ohms
i 30 ohms

FOUR.TRACK

be introduced

to

four-track

MoDELS

i

43H
39H
TI

1000

pF

I 50-750

pF

12

pF

12

i

00 ohms

.l00

ohms

100

ohms

TO

pF

when

r 2-2

pF

Ref. para
ley. The

4.4

instruction

type number for the

62.1-5716-12C

to

62.2-5714-12C.
The

motor capacitor consists
and
recorder

creased from

between

uF in the

.l

from 60
the

l.l uF

solidering tags

specifications printed

modification

is obtained by cutting this same

decrease the capacitance.

The

transformer is connected to

ll0 volts

according to the

tro. 50.

lf

0V

for

changing

50 c/s motor

and for the 60

of

the motor

pulley

version

c/s

it is

two capacitors

same can. When modifying ihe

c/s to 50 c/s, the capacitor is in-

io 1.2

uF by connecling

the can according to

on

the capacifor. The

on

a wire

opposite

wire

220 volts

either

following schematic

60

y't

220v

50

y't

l.l

pul-

is

uF

tape

to

or

on

1r

5.lO MODIFICATION
. Il0 VOITS 60

FROM

c/s

When changing from 50 to 60

meter
for the increased
citor Cl is
The transformer

can

50/60

6.0

To improve

fications have

complele reference number

number

cified

18.19

the molor pulley

of

is reduced to

mains frequency. The motor capa-

also changed from

TR286

is a tapped

be connected for eilher 220 volts

c/s.

Parts list

the equipment, minor changes and

been introduced on the models. The

of

of the tape recorder must therefore be spe-

parts

-

1- 12C

spare

- * -

are ordered,

Rectifier

where

l234components.

l) The three

are referred

2) This digit is presented

6.0.1 Mechanical

Ref. No.

or four first

to in

all

parts

numbers state

figures.

only

Description Fig.

220 VOTTS 50 c/s TO

c/s operation,

the dia-

compensate

.l.2

uF io

.l.1

uF.

transformer which

ll0 volts

or

modi-

part

the

and

serial

i.e.:

circuit

board

part

the

with

and

when modification is

Fig.

Tronsformer

56.

introduced to the

also refers

3)

The type number
for

which the

12C - The

all models.

122 - Paris

124 - Parts

-

1221

Paris
l24l - Parts
1222 - Parts

1224 - Parts

Modified

4)

replacement

ref.

connections lor

part.

220 Y 50

In

some

to subcontractors

state the

part

is used.

part

is

interchangeable

type

only for model

for model

only

only for model

only for model 12-41

for model

only

only for model 12-24.

parts

indicated

parts

for

with

of earlier design.

qnd

c/s

I I 0 V 60 c/s.

cases this

specifications.

of tape recorder

and used for

l2-2.
l2-4.
12-21 .

.

12-22.

*

may

be

number

used as

11.1-286-t2C

11.2-t2C
r r.3-l 2c

-l

r 3.1

22

13.1-124

-l

l4.l

2c

-l -l2c

l4.l

14.2-12C

14.3-t2C

-r

I 4.3-l

2C

11.4-t2C

-l

14.5-l

2C

Power rrqnsformer 11O-22OY,

Moins terminol

Brockel

Oscillotor lronsformer Tl
Oscillotor lronsformer T3

l65V

Motor
Moror 165 V 50/60 c/s Engel
Mounling

Bridge for mouniing
Bridge
Shock obsorber
Plote

shim 2,3 mm

strip

for tronsformer

50/60cls Engel

plole

for motor, complete

for mounting

for

of
of

molor

(2-trock)
(4-rrock)

motor
motor

5O/6O

c/sT2

31,53
3t,53
53
53
53
53

Introduced
Removed

Inlroduced

Inlroduced

from ser. No 746951

from ser.

No.

745951

from ser. No 746951

from ser. No

745951

Ref. No.

14.5-2-t2C

14.6-12C

78.1-122
|8.t-t24

18.2-t2C
I

2C

8.3-l

18.4-t2C
r

I2C

8.5-

18.6-t 2C

18.7-12C
I

8.8-I2C

r

8.9-t2C

r8.1

I-l2c

18.12-12C
r8.13-r2c

18.r4-l2c
r

5-r 2c

8.1

r8.16-l2c

18.17-t2C
r

8.1 8-l 2c

I8.t9-l2C

18.19-l-l2c
r8.21-l2c

't8.22-t2C

18.23-t2C

18.24-12C

18.25-12C

19.1-12C

19.2-12C

1?.3-12C

19.4-12C

19.5-t2C

19.6-12C

-I

3 l.l

2C

31.2-t2C
3 r .3-l 2C

31.4-t2C

-r

31.4- l

2c

3r.5-t2C

32.1-12C

32.2-t2C

32.3-12C

-l

r

33.

2C

33.2-12C

33.3-r 2C

33.4-12C

33.5- l 2C

33.6-l 2C

33.7-12C

33.8-r 2C

-l

39.I

2C

39.2-t2C

39.3-l 2C

Description

Plole

shim

.7 mm

Brocket,

molorcopocitor

Pre-omplifier
Pre-omplifier
Shield
Guide for pre-omplifier
Frome
Brocket
Bor

for pre-omplifier
Record-ploybock
Record-ploybock
Equolizotion
Output

Clomp
Heot

Heol

Rubber

Input circuit

Fl,t-A,lX
Shield for
Rectifier
Rectifier
Fro.re.for
Coniqct,

Swilch guide
Switch
Switch guide
equolizqtion

Erose heod
Record/ploybock
componenls

Termincl
g r"en/green

Terminol

red/blue

Terminol
Terminol
yellow/yellow

Elecironic
withoul

Brocket
Tube
Spring
Spring

Rubber
Volume control

Volume
Knob

Switch,
Microswifch
Plote spring,

Momentory

Actuotor

Slip-on

Insulolion
Clomp

Knob for
Knob

Function

boord
boord

for pre-omplifier

for pre-omplifier

for

frqme for pre-omplifier

switch
swiich ch.

switch

omplifier

for
sink for
sink

spocer for oulput

swirch

circuit boord
circuil boord

guide w/contocts

lubes

for

socket

for indicotor

for

tube for

control

for BASS

ON-OFF

lever,

knob for 33.1

for microsw;tch

speoker

for

function seleclor

seleclor

boord with

ouiput

omplifiers

outpul

for tronsislor

boord

inpui

circuil

rectifier

rectifier

circuit boqrd

w/contqcts

w/contocts,

switch

btord

circuii

heod-circuit

plote

with phono

plote

wirh

strip

for click-fiher

plofe

with

beom

indicotor

indicotor

for

EAM86

indicotor

indicotor boqrd

knob,
knob, lower

ond TREBIE conrrol

Rxl

microswitch

stop kit, complele

delrin

shield

for 33.'l

selecfor

lever ch.2

wirh

circuii

withcomponenis
with

components

boord

boord

boord

boord

ch, I

2

components

lronsislors

omplifier

components

with componenfs
wilh

componenls

boord

CHI
CH?

wilh

components

boord with

CHI:

iocks

phono

phono

boord

tubes
tubes

upper

iocks

iocks

boord,

colour:

CH2:

(2-trock)
(4-trock)

boord

6a </

<a Rt

53
9,
53,
53
54

<a

f,J

q?
{?
JJ

'il
I l,

53

JJ

JJ

E?

441

4 <a

38

6,9
7,9

35

53

Jd
?a

54

54

35

54

Fig.

ref.

Notes

Inlroduced

Introduced

Introduced from

Iniroduced from

from

from

ser. No 746951

ser.

743026

No,

ser. No. 743026

No.743501

ser.

t

(\

(

42

Ref.

No.

Descri

ption

Fig. ref.

Notes

fF

fi

39.4-r2C
I 2C

39.5-

39.6-l2C

39.7-12C

2C

39.8-r

39.9-'t2C

39.rr-l2c

39.12-12C
2C

39.r 3-l

39.16-t2C

39.17-t2C

Jv-to-tzL

39.19-t2C

39.21-12C

-t -12C

39.21

39.22-t2C

39.23-t2C

39.24-12C

-t2C

44.1

44.2-12C

44.3-12C

45.1-1-l2C

45.1-2-t2C

45.2-12C

45.3-12C

45.4-12C

45.5-t2C

45.6-12C

-12C

45.7

48.1-1221

48.1-1241

48.2-12C

-1221

48.3-t

49.3-2-1222

48.3-3-1241

48.3-4-1242

48.3-5-1221

48.3-6-1222

-1241

48.3-7

48.3-8-1242

48.4-t2C

2C

48.5- t

48.6-1222

48.6-1242

-l

2c

l

5l.

51.2-12C
2C

5l .3- I

51.4-t2C

l2C

5r .5­5',t .6-l2C

51.7-t2C

5 I.8-l 2C

51.9-12C

5r.rr-l2c

51.13-l2c

52.1-t2C

Funclion

qrm

lndex
lnlerlock orm
Arm

for funciion seleclor switch
Bross beoring for funcfion seleciors
Spring fcr inlerlock orm
Brocket for function seleclor
Spring for index orm

beoring for funciion

Sleeve
Shield for speoker seleclor
Speoker selector switch
Arresiing orm for equolizqtion switch

for orresling orm

Spring
Arm

for equolizotior switch
Arm for equolizotion swilch
Clip for orm for equolizotion switch, fronf
Clip

for

Com wosher for orm for equolizofion switch

Piloi lomp

for pilot lomp

Socket
Shield for

Microphone
Microphone

Input conioct for CR. PHONO ond RADIO

lever ch.

selecfor

orm for equolizotion switch, reor

pilcf lomp

contoct

for 1 l5

iock

l

qrms

selectors

(DlN)

V version only

(DrN)

Externol
Exlernql speoker output

for microphone input circuit

Shield
Brocket for
Wqsher for microphone

I l5 V version only

Wooden
Wooden ccbinet
Buffer, polyethylene
Designofion
Designofion plale 22O YlSO cls
Designotion

Designotion plale 22O YlSO c/s
Designotion
Designotion plofe I l5 v/60 c/s
Designotion

Designofion plore l l5
Designction plote for input lerminols
Designotion

Luggoge lype corrying cose
luggoge lype corrying cose

Pressure wheel
Shoft for
Pressure wheel brockel, complete ossembly
Spring for
Lever for

Roller

for
Spring for
Shoft

for

Tope

broke ossembly, complete
Equolizotion lotch
Broke block for fope broke

pqr

Inp

ouipul

speoker

ouipul lerminqls

cqbinet

plote 22O

plote

plote I

plole I

plole

pressure wheel

pressure wheel

pressure wheel

pressure

pressure

pressure wheel lever

iock
contoct

iock

Y/50

22O YlSO

l5 v/60

15 v/60

v/60

for output terminols

wheel brqckei

wheel brocket

(DlN)

-

cls

cls

c/s

c/s
c/s

'I

1

'll
53,

54

ll

53
53

JJ

62

9

6,9

53
54
53

10, Il
r0,

1r.35
10, Il
r0,35

'r

r,35
9
9,

l0
35
1r,35
11,35

II

12,21 , 22, 23, 24, 25,26 27,28,
30

29,

Inlroduced from

ser. No.

746951

43

No.

Ref.

-l

2c

53. I

53.2-r2C
2C

53.3-l

53.4-l2C
2C

53.5-l

53.7-12C

54.1-t2C

54.2-t2C

54.7-l2C

54.5-12C

-l

2c

59.r

59.2-12C

59.3-r2C

59.4-t2C

59.5-12C

59.5-l2C

59.7-12C

59.9-l2c

59.9-t2C

59.11-l2c

59.12-12C

3.r 2C

59.1

59.14-12C

2C

I 5-l

59.

59.15-12C

59.17-12C

8-l2C

59.1

59.19-12C

59.23-l2C

59.24-12C

59.25-t2C

59.26-12C

-l

l

2c

61.

61.2-l2c

2C

6r.3-l

61.4-r2C

61.6.12c

61.7-12C

2C

6 t .8-l

61.9-t2C

-5716-12C

62.1

52.1-5714-12C

62.2-12C

-l

2c

65.1

65.2-l2C

65.5-l2C

65.6- l2C

-l

-l

2c

66.1

66.3-12C

66.4-12C

66.5-l2C

66.6-l2C

66.7-t2C

65.8-t2C

66.9-12C

I

Speed tronsfer
Trqnsfer wheel holder
Mounting orm for lrqnsfer
Knob

for

Sprirrg for

Porollel

Operoting lever, complete ossembly

Knob

for operoting
Operoting lever shoft
Clips for operoling

Spring

Pressure
lndex lever

Shoft for index lever
Spring for index lever

Clutch lever for supply turntoble
Upper clutch lever for
Lower

clutch lever

Spring for 59.6 and 59.7

Com

disc

Com disc orm, complele

Exiension spring for com disc orm
Spring for

Spring for 59.8

Spring for
Eccentric segmeni

Tronsfer wheel

Delrin

butfon for clutch lever

Shqft for clutch levers

Tronsfer brocket
Brocket
Shqft for com

Toke-up pulley
Supply

sheet

Mylor
Mylor sheei for supply pulley
Tope tight disc
Helicol
lurntqble

Helicol compression spring
pulley
Spring for tope

Motor
Motor
Rubber drive

Toke-up
Supply turntoble, lefl

Delrin

Tope

reel

Flywheel,

Bushing
Spring for
Spring for lower flywheel beoring

Broke

spring wifh felt
Lotch for flywheel beoring, threoded
Lotch for flywheel
Trust

spring

Description

wheel

speed

selector

tronsfer wheel holder

qrm

lever

lever

with

pod

pressure pod

linkoge orm

for com disc

pulley

compression

(left)

(righr)

pulley
pulley

turntoble. right

nut

holder

compleie

for flywheel

pressure pod

felt for

orm

for loke-up lurntoble

lifting

orm

orm

disc

(right)

disc

(left)

disc

toke-up pulley disc

for

spring

disc

tight

50 c/s

c/s

60
belt

beoring

upper

flywheel beoring

beoring, not threoded

with delrin knob

wifh

toke-up turntoble

orm

orm, compleie

pod

wheel

delrin boll

shoft

disc

supply

for

ioke-up

for

flywheel

for

Fig. ref.

12, 31,

34
12,34
12,34
38
12,31
12,34

7,53,54

J6

7
7

'|

l, 35

't

l, 35

12, 2t, 23, 25, 27,

21

12,

23, 25, 27,

,

29
29

21 , 23, 25, 27, 29

13,

12,

t4, 2t, 23, 25, 27, 29

12, 16, 17, 22, 24,

26, 28, 30
16, 17,22,24,26,28,30
2t , 22,

23,24,25,

a/

26,

27, 28,

6,34

12,34,

JJ

22,24,

26,28, 30

12

6,
9

12,34

6,

12,21

22,23,24,25,26,27

,

29,30

1

21,

2,

22, 23, 24, 25, 26, 27,

29,30

r t, 35

34

6, 16,

r3, 14.
t6

'r3,

l5

24,

17,22,

26,28, 30,

15, 21, 23, 25,

27,

13,2r

13,23,25,27,29

16, 22,

24, 26, 28,

30

13, l5

6,31,

34

6, 31,

34

6

16,22,

6,

6, 13,

1e

24,26, 28,30,31

25,

21, 23,

27,

29,

3l

31 32,34
9,32

1'

32
12
9,32

12,32

29,30

,28,

28,

29,

Noles

fr4

3l

31

o(

lntroduced from

lntroduced from ser. No.74870I
lntroduced

ser. No.748701

from ser. No.739301

44

--|F

i

;

r

&
B

t

F

lr

?T.

Ref.

66.1|

66.12-t2C

66.13-t2C

66.14-12C

65.14-t

66.71-t2C

66.8 I

69.1-12C

69.2-12C

69.3.12c

72.1_t2c

72.2-t2C

73.1-t2c

73.2-t2C

73.3-12C

73.4-12C

73.5-12C

73.6-12C

73.6-r_t2c
_122

74.1_t

74.1-2_122

74.1-3-124

74.1-4-124

74.2-t2c

74.3-t2C

74.4-12C

74.5-t2C

74.6-12C

v4.7-t2C

79.1-t2C

79.2-t2c

79.3-t2c

79.4-t2c

79.5-t2c

79.9-t2C
'/9.11-12C

79.13-12C

79.14-12C

79.1

5-t2c

79.17-l2c

79.18-12C

79.21-t2C

79.22-r2C

79.23-12C

79.24-t2C

79.25_12C

79.28-12C
v9.29-t2c

79.31-r2c

79.32-12C

79.33-r2c

79.34.12C

79.35-12

No.

-t2C

-12C

-l

2C

Feltring,
Bushing,
Springlock,
Felt,

flywheel

Felt,

f lywheel

Felt

ring

Thrusl

wosher

Pulley

for

Pulley

for

Rubber

Flonge

Flonge

for

Fronl

heod

Reor

heqd

Screw

heod
Brocket
Brocket
Brocket

Brocket

Top

cover

Top

cover

Top

cover

Top

cover

Mounting

Rubber

mounting.

Wqsher

for

Rubber

wosher

Lower

rubber

Upper

rubber

Window
Window
Speed

selector

Spring

for
Mounting
Cover

plore

Cover

plote

Tope

guide,

Tope

guide,

Tope

guide,

Acfuoling

'rosher

Felf

Clips

for
Clips
Revolulion
Brqcket
Brocket

Stereo

Tondberg
Adiustoble
Spring
Wirebrqcket
Feltring,
Clomp

C3

for

C4

for
for

emblem

for

knobs

for

flywheel

flywheel

flywheel

(odhesive)
(odhesive)

for

flywheel

revolution
revolulion

drive

belt

for

beoring
beoring

cover

cover

cover

for

reor

{or

reor

for

front

for

front

with

interlock (l

with

interlock

slrew (4

mounting

mounling,
mounling,

for

counter

for

indicotors

brockei

speed

brqcket

(wirh

I

(with

2
Ieft
right

odiustoble

spring

for

for

cover

counler

revolulion

end

stop

emblem

tope

guide,

odiusioble

for

microswitch

mqins

cord

De

scri plion

beoring

counter (turntoble)
counler (counler)

for

counter

house,

house,

lefl

heodcover,

heodcover.

heodcover
heodcover

l5

(l

l5

x24

mm)

front

screw

reor
reor

selector

for

stobilizing

tope)

felr)

end

siop

plole

counter

spring

righr

fope

guide,

right

left

right

V

V

_

60 c/s)

_

6e

c/s)

ironsistor

righr

6
6

38

6,34

AA

6

6

1l
6, tl
il,35

6,il

53
53
9

9

I l,

9
38

32

32
32
32

JZ

32
32

to

53

{?

r3,

38

JO

38
38
38

ll

35

r5,

l6

Fig.

ref.

Introduced
Introduced

Introduced

Inlroduced

Removed

Removed

Iniroduced

from

from

from

from
from

from

from

ser.

Noles

ser.
ser.

ser.

ser,

ser.

No.

ser.

No.

739301

No.

739301

No.

739301

No.

746951

No.746951

7469i0

No.

745001

45

Screws, washers, and lock washers

4410]

Screw3x4mmc.h.
Ml02 Screw 3 x 4,5 mm c.h,
MI04

Screw3x6mmc,h.
Ml07

Screw3xSmmc.h.

12

Ml

Screw 4 x 6 mm c.h.

13

Ml
Ml14

f

Ml

6
Ml20
M]2l Screw 2,3 x 12 mm c.h.

x

4

Screw
Screw 4

Pqrker screw l14" No.

Screw 2,6 x 4

8

x

l0 mm

mm c.h,

c.h.

mm c.h.

4

Ml22 Screw

Ml25
Ml30 Screw3xSmml.h.
Ml32 Umbroco screw
M30l

M302

M303

M307
M3l3
M3t4 Lock ring 3
M3l5

4 x 22 mm c.h,

wosher 7,5

ring 2,5

mm

ring 3,5

mm c.h.

'l/8"

mm

mm

Screw 3 x 6

Turbqx
Turbqx wosher 7,5
Turbox wosher 7,5
Turbqx wosher I I

Lock

lock

x

I.5 mm heod

x

mm

3.5
x

4,2

0.2

x

4,2 x 0,3 mm

x

4,2 x 0,5

x

x

0,5 mm

6,5

Lock ring

M3l7
M3l8
M321
M325 Wosher 16

mm

M33l

mm

M333 Spring wosher l/8"
M348
M349 Lock
M355
M403 Rivel

Lock
Lock ring

Lock

M329

Bokelite wosher l8 x l0

Teflon wosher

Teflon wqsher

5 mm

ring 6 mm

4 x 0,6 mm

x

4,2

ring 2,3 mm

wqsher

4 mm

mm

3.5

6,5

6,5

x

1

mm

,65

x

mm

0,5

x

x

4,2

x

4,2

mm

0,2

x

mm

0,5

5.0.2

Electrical

Transislors

Ql-l2C
Qror-l2c
Ql02-r2c
Ql03-l2c
Ql04-l2c
Qr05-i2c
Ql06-l2C

Ql07-l2c

Qr08-r2c

Ql09-l2C

l0-l2c

Ql

-l2c

il

Qr

r2-r2c

Qr

l3-l2c

Qt

Qll4-l2c

l5-l2c

QI

r5-l2c

Qr

r7-l2c

Qr

r8-r2c

Ql

Qll9-lzc

Q120-t2C

Q30l-l2c

Q302-r2C

Q3o3/Q304-l2c

a3os/Q306-r2c

Q40r-r2c

Q402-r2C

Q4031Q404-r2c

Q405/Q405-r2C

-r

2c

Q50l

Q502-r2C

Polenliometers

RllR2-l2C Potentiomefer 2

R3/R6-1 2C

R4lR5-r2C

Rr 4-t 2C

Rr5-l2C

R20- r 2C

2C

R305- l

R3r0-r2c

R405-l 2C

2c

R4r 0-r

-l

R60r

2c

R605- r 2C

parts

Tronsislor T13030

'

,
"

,
,
,

'

"
,

"

,
,
'
,'

"
,

,
,
,
'
,

"

"
,

"
,

"
,

"
,

Bclo9B

(u3962)

Bcr

t4

(sE400l)

Bcr

13
Bclo9B
Bclo9B
BCIO9B

Bcto9B

(sE400r)

Bcr

13

BCIO7B

u2848/2
u2s48/2

Bclo9B

(u3962)

Bcr

t4

Bcl13(sE400l)

BCIo9B
BCIo9B

BclogB
Bcto9B

(SE400l)

BCII3
BCIo7B

(SE400l)

BCl

13

SE6002

Act27/Acr2g

2-ADr50

(sE400l)

Bcl

13

SE6002

Acr27lAcl2B

2-ADr50
u2848/2
U2848/2

x

2 x 50

x

2

50 kohm lin

22 kohm
22 kohm

100
250 kohm lin
200
250 kohm lin
200
250 kohm lin

250

|JU2e48h)
(U2848/t)

l0 kohm loo

kohm

lin

lin

kohm lin

ohm lin

ohm lin

kohm lin

(U2848/r)
(U2848/t)

(Act27lActs2)

(Ac127/Acrs2)

lin

Coils

L1-l2C Coil H

L2-12C " L2

t3-l2C " t3
L4-12C " L4 19 kcls filter

,

t5-l2C

t5 l9 kc/s

Heads

34H-122

37H-124 Erqse heod

38H-124
39H-122
4OH-124 Record/ploybock
41H-124 Erqse heod
43H-122

Erose

Record/ptoybock
Record/ploybockheod

Erose

heqd

heod

(below
(below

(obove
(obove

Diodes

D50l-l2C

D60r-r2c

D602-t2C

IN97lB

rs920

tS920

Zener

Rectifiers

(below

Y4l6
840C3200
8250C75 kp

seriol No.

(obove

742026\

seriol No.742027)

Fuses

S50l-l2C 2A 5 x 30
S502-l2C O,2A

l 2C

5503-

2A 5 x 20

mm

5 x 30 mm slow

mm wilh wires

Tubes

vl-l2c EAM86
v2-12C

EAM86

Speakers

HTlll-3ohm

liher

seriol
seriol

(below

heod

(obove

heod

seriol
seriol No. 746651)

-2F27)

(BZX25

slow

No.746650)
No.733200)

seriol No.7332001

seriol

No.733201)

No.733201)

t

t

4

(

46

t

n

Resislors:

Ref.

R7-t2C
R8-l
R9-r 2C
Rl0-1
Rl t-l2c
Rl2-12C
Rl
Rl 6-l 2C
Rr 7-t 2C
Rl0r.r2c
Rl02-l2c
Rt 03-1
Rr04-l2c
RI05-t2C
R1
Rt07-t2c
Rl08-1
Rl09-l2c
RI r0-t2c
Rl I I
Rt l2-r2c
Rl r3-l2c
Rl |4-l2C
Rl
Rl 1 6.12C
Rl t7-t2c
Rl r
Rl 19-l2C
Rr20-r2c
Rl2l-l2c
Rt22-t2C
Rl23-t2C
Rl21-t2C
Rl25-l2C
Rt26-t2C
Rl27-t2C
Rl28-t2C
Rl 29-l
Rl30-l2c
Rt3I-l2C
Rl32-l2C
Rr33-l2C
RI
Rr35.l2C
Rl
Rl 37-l
Rl38-l2c
Rr 39-I
Rl
Rr4l
Rt42-12C
Rt43-l2C
Rt44-t2C
Rl 45-l 2C
Rl 46-t2C
Rt 47-1
Rl48.124

Rt48-122

l)

Low-noise resislor.

No. Description

ohm

51

2C

2C

3-1

2C

2C

06-l 2C

2C

-l2C

l5-l 2c

8-l 2c

2C

34-l 2C

36-l 2C

2C

2C

40-l

2c

-l2c

2C

Kohm

22

Kohm

22

'100

Kohm
100 Kohm
I Mohm

'|

Mohm

ohm,

3,9

ohm,

3,9

Kohm

220
2,2Kohm

100 Kohm

Kohm

39
47 ohm
27 Kohm

Kohm

27
27 Kohm

I Mohm

Kohm

68

Kohm

l0

ohm

560

1,5 Kohm

Kohm

470
1,5 Kohm

Kohm

68

Kohm

5,1

Kohm

220
2,7 Kohm

Kohm

2,2

Kohm

3,9
820 ohm
5,1 Mohm

Kohm

68

ohm

620

1,2 Kohm
100

ohm

l0 Kohm

Kohm

I

4,7 Kohm

120

ohm

33 ohm

Kohm

68

ohm

33

1,5 Kohm

JJ ONM

9lO ohm

ohm

33

ohm

510

Kohm

43

Kohm

220

'10

Kohm

30 ohm

I
1 Kohm

Kohm

5,1

Kohm

1,5

Kohm

I

330 ohm

100 ohm

Wire Wound

5 W

W Wire Wound

5

t
l/a
r
1/r
r/a

1/a
1/a
)
r/a
1/r
1/

1/t

1/a

1/t
r/+
1/t
1/t

llzW

r/+

t/zW

1/zW

1/zW

t/:

1/z\N

/r v't1)

wr)

/t Wl)

wl)
Wr)

w11

Wr)

w11

lr

Wr)
w1)

a v,|11

w1\

wt\

w))
wr)
wr)
W11

Wr)

wr)

o/o

l0

o/o

l0

o/o

10

o/o

I0

o/o

l0
l0o/o

o/o

10

o/o

l0

o/o

l0

o/o

5

olo

5

o/o

5

5olo

olo

5

o/o

5

5olo

o/o

5

olo

5

o/o

5

o/o

5

Solo

o/o

l0

o/o

5

o/o

l0

o/o

5
5o/o

o/o

5

olo

5

l0o/o

o/o

l0

o/o

l0
'10

o/o

o/o

l0

o/o

10

o/o

5

o/o

I0

o/o

l0

o/o

1O

o/o

10

o/o

I0
1oo/o

o/o

l0

o/o

l0

olo

5

lOolo

o/o

5

l0o/o

olo

5

o/o

10
100/o

o/o

l0

5olo

i0o/o

o/o

1o

o/o

10

o/o

l0

o/o

l0

o/o

lO

Chonged from
Chonged from seriol No.742326
Chcnged from
Chonged

seriql No.742326

seriol No.738926

from seriol

No.

739900

47

t)

Low-noise

48

Ref. No.

Rl19-124
Rt49-122
Rr 50-r 24

-t

Rl5l

2c
Rl52-t2C
Rr53-l2C
Rl 54-t

2C
Rl55-r2C
R] 56-r

2C
Rl 57-1

2C
Rl 58-l

2C
Rl 59-l

2C
Rl 60-1

2c

-r

Rl 6l

2c
Rl 62-l

2C
Rr63-r2C
R I64- I 2C
Rl65-t2C
Rl66-l2C
R167-12C
Rl68-l2C
R1 59- I

2C

R170-l2C

-l2c

RlTl
Rt72-t2C
Rl 73-l

2C
Rt74-t2C
Rl 75-r

2C

R't76-12C

-12C

Rt77
Rl 78-r

2C
Rt79-t2C
Rl

80-r 2c

-l

Rr 8l

2c
Rl

82-l 2C

Rr

2C

83-l

Rl

84-r 2C

Rl

85-l

2C
Rl

85-1 2C

Rr

87-l2C
Rt88-r2C
Rr89-l2C
Rl 90-

I 2C
Rl9l-l2c
Rt92-t2C
Rl93-l2C
Rt94-t2C
R I

95-l 2C
Rl 96-l2C
Rr

97-l 2C

Rl 98-l

2C

Rr

99- I 2C
R200-l

2c

-l

R20l

2c
R202-t2C
R203-l

2C
R204-t2C
R205-l

2C
R206-r

2C
R207-t2C
R208-t

2C

resislor.

130 ohm
'100

ohm

130 ohm

Kohm

43
43 Kohm
2,2 Kohm
100 Kohm
220 Mohm
39 Kohm
47

ohm

27 Kohm

Kohm

27
27 Kohm
I

Mohm

Kohm

68

l0 Kohm

560

ohm

1,5

Kohm

470

ohm

1,5 Kohm

Kohm

68

220

Kohm

Kohm

5,1
2,7 Kohm

2,2Kohm
3,9 Kohm
820 ohm
5,1 Mohm

Kohm

68
620 ohm
1,2 Kohm
100 ohm
l0 Kohm

Kohm

I

Kohm

4,7

I 20 ohm

ohm

68

ohm

33
1,5 Kohm
33 ohm

910 ohm

Kohm

33

ohm

510

Kohm

43

220 Kohm
'10

Kohm

'|

30 ohm

'l

Kohm

Kohm

5,1

Kohm

3

Kohm

I

ohm

33

ohm

150
68 Kohm
I

ohm

50

68 Kohm

Kohm

5,1

Kohm

5,1

Kohm

I00

Kohm

I00
I0 Kohm

Descripiion

r/n

wr)

t/a

wr1

r/r

wr)

t/a

wr1

1/aw11
t/a

wr1

r/+

wr1

1/r

W1)

'/+

w1)

1/t

W1)

1/t

w1)

1/r

Wl)

1/z

W

1/t

w1)

1/zY'!

1/awl)
r/+

Wt)

1/rw1)
r/+

Wr)

1/zW

r/a

Wr)

1/z'N

1/zW

t/zW

1/zW

1/zW
1/z\N
1/zW

r/g

wl)

1/z'N

1/z'l'l
1

/ z'l'l

1/zW

1/t

wl)

1/t

w1)

1/zW

1/zW
1/zW

o/o

l0

o/o

l0

o/o

l0

o/o

I0
l0o/o

Solo
5olo

o/o

5
5o/o
5olo

o/o

5

o/o

5

o/o

5

o/o

5

o/o

5

o/o

5

o/o

5

o/o

l0

o/o

5

o/o

l0

olo

5

5olo

Solo

5olo

o/o

I0

o/o

l0

o/o

1O
'10

o/o

l0o/o
'10

o/o

5olo

o/o

l0

o/o

10

o/o

1O

o/o

1O

o/o

l0

o/o

1O

o/o

l0

o/o

5

o/o

l0

olo

5

olo

l0

o/o

5

o/o

l0
loo/o

'10

o/o

5o/o

o/o

l0

o/o

10

o/o

lO

o/o

l0

0/o

]o

Solo

o/o

l0

olo

5

l0o/o

o/o

I0

o/o

IO

o/o

I0
'10

o/o
o/o

1O

Chonged
Chonged from

Chonged from seriol
Chonged

Chonged

from

seriql No. 743026
seriol No. 743026

from seriol

from

seriol

Notes

ti

t

No.733228
No. 744500

No. 744500

No.

Ref.

R209-12C

2c

R2l 0-r
R2l l-l2c

-r

2C

R301
R302- l 2C
R303- | 2C
R304-r 2C
R306-l

2C
R307-',r 2C
R308-l

2C
R309-r 2C

-l

R3l I

2C
R3r2-l 2C
R3l3-l2C
R3l 4-l

2C
R3r5-r2C
R316-l2C

7-l

R31

2C

R3 I

2C

8-r

R3l9-',r 2C

t

R320- r 2C
R40l-l 2c
R402-12C
R403-r

2C
R404-r 2C

R406- I 2C
R407-12C
R408- l 2C
R409- t

2C
R4l l-l2c
R412-12C
R4r 3- I

2C
R4t4-t2C
R4r 5- I 2C

R4l6-r 2C
R417-12C
R4r8-r2C

R4l 9-1 2C

R420-l

2C

-r

R50l

2c
R502-12C
R503-l

2C
R504-l

2C

R505-r 2C

R506- I 2C
R507-',|2C
R508- r 2C
R602- I

2C
R603- 1

2C
R604- I

2C
R606- r 2C
R607-12C
R608- I 2C

Kohm

l0

ohm

82

ohm

82
'10

Kohm
ohm

82

Kohm

330
l0 Kohm
22 Kohm
l0O ohm

Kohm

I

Kohm

2
130

ohm

ohm

5I

ohm

5l
200 ohm
7,5 Kohm
I Kohm

ohm

82

ohm

,47

ohm

,17

100 ohm

l0 Kohm
82 ohm
330 Kohm
l0 Kohm
22Kohm

I 00 ohm

Kohm

I

Kohm

2

'130

ohm
5l ohm
5l ohm
200 ohm

7.5 Kohm

Kohm

I

82 ohm

ohm

,47

ohm

,47
1 0O ohm
820 ohm

l30ohm NTC

Kohm

510
3,9 Kohm

I Kohm
5,I Kohm
510 ohm
300 Kohm

100 Kohm

150 Kohm

I0

Mohm

100 Kohm

'150

Kohm

l0 Mohm

NTC

NTC

Descripfion

1/t

tN

t/tW
\

z'i't

/

1/tW
1/zW
1/t\N
1/zW
1/zW
1/zW

r/r

wrl

1/zW

1/zW
1/zW

1/tW

thw

1/z'N

3

W Wirewound

3 W Wirewound

1/zW

1/zW

t/zW

1/zW
r/s

wr;

1/zW
1/z

rN

1/zW

1/zrN

1/zW

3 W Wirewound
3

W Wirewound

1/z'N

2W

1

/z'l'l

lw

1

/z'N

1/zW
1/ztN

lw

lw

o/o

l0

o/o

l0

o/o

lO

o/o

lO

o/o

l0

o/o

l0
70o/o

o/o

l0

o/o

l0

o/o

5

o/o

l0

o/o

2Q

l0o/o

o/o

lO

o/o

l0

o/o

I0

o/o

1O

o/o

l0

o/o

l0

o/o

l0

o/o

l0

o/o

l0

o/o

lO

o/o

l0

o/o

1O

o/o

10

o/o

l0

o/o

5

o/o

l0

o/o

2O

o/o

l0

o/o

10

o/o

l0

o/o

l0

o/o

l0

o/o

l0

o/o

I0

o/o

l0

o/o

l0

o/o

l0

o/o

20
l0o/o

o/o

l0
'10

o/o
o/o

l0
'10

o/o
o/o

l0

o/o

10
lOo/o

o/o

l0
I0o/o

o/o

l0
'10

o/o

Notes

Chonged from

seriol

No.749500

from seriol No.749500

Introduced
Introduced from
Inlroduced

from seriql

seriol

from seriol

No,733051
No.733051
No.734001

Chonged from seriol No.749500

Chonged from

Introduced from
lntroduced from seriol No.733051
lnlroduced

Chonged from seriql

Chonged from seriql

from seriql No. 734001

No.749500

seriql

seridl No.733051

No.739500

No. 739500

l)

Low-noise

resislor.

49

Capacifors:

_I2c

cr

-t2c

ct
c2-t2c
c3-l

2c

c4-t2c

c5-l2c
c5-12C

c6-12C
c6-12C
cl0-l2c
cll-l2c
c12-12C

cr3-12C
cI0r-l2c
cl02-12C

c r

03-l 2c
cto4-12c
cl06-t2c
c107-12C

cr08-l2c
c't

09- t2c

cr

l0-l2c

cr

I l-I2C

cll2-t2c

cl13-12C

I 4-l2c

cl

r5-r2c

cr

cl I

2c

6-1
c1t7-124
cr17-122
cl r8-l2c
clt9-t2c
ct20-124

cl20-122
cI2I-l2C

ct22-t2c
ct23-l2c
ct24-12C
c r 25-l

2c

ct26-t2c

cl27-t2C

c r

28-l 2c

c129-12C

c

I 30-l

2c

c

l3l - l2c
cl32-l2c
c

I 33-r

2C
cl34-r2c
cl35-t2C

-t2c

ct4t

ct42-t2c
c143-12C
cr44-t2C

ct45-t2C
c146-t2C
cl47-12C

ct48-l2C
c

I

50-l

2C

-l2c

cl5t
c152-t2C

50

1,1
l,l

,l

2500

'|

250
820
250 pF
820

250 pF
10-60
lO-60

2000 pF
2000
25
25
I

00 prF

300 pF
2,5
3300
2,5
80

25
5pF

560 pF

I

000 pF

3300
2,5
80
300

I

000
.1

,t

2O-25O
150-750

80 pF

,022
,15

,047
,015
,ol

pF

,l
,15

2,5 ytF

2.5

lr

500 pF

pF

,l
80 pF
2,5

IF

,01

5000 pF

5000

1000
1000

25

prF

25

prF

I00

pF
300 pF
2,5

prF

3300

'{F

2,5

prF
lrF

pF
FF

StF

trF

pF

pr
trF

pF

pF

F

trF

pF
pF
pF

pF

ILF

FF
pF

pF

pF

pt"F

pF

ttF

pF

pF

ptF

pF

ptF

pF

So/o/0,1

pF
!-r

pF
pF

pF

pF

pF

pF

Trimming

Trimming

Trimming

Trimming

o/0,

I0

380

380

400

160
125
160

I25

copociror

copocitor

400

400

25Y

25V

l0v

400

64Y

500

64V

25V
25V
20v

125

160

500

64V

25Y

'125

125

250

250

copocitor

Copociior

25Y

100
]00
100
l0OY

25OY
25OY
100

Y

64

64 v

6O0Y

25OY

25V

64 v
250Y
125

V
l25V
160

V

160

V
25V
25Y

't0

v

4OOY

64 Y

500Y

64 Y

V

v

v
64V
40Y

v
Y
v

V

Y
v

v

v

V
v

2,5

v

-

V
V

Y

2O

v

2O

V

t0o/o

V

V

2,50/o

20o/o
20o/o

V

So/o

-1g11gg

-tO/too
2Oo/o

200/o

-tO/t}o

20o/o

lO

l0
l0
10o/o

2Oolo

-10/100
2Oo/o

-r0/1OO

o/o

5

o/o

2O

0/o

2,5

0/o

2,5

0/o

2,5

0lo

2,5

o/o

2Q

o/o

20

o/o

20

-t

o/r

oo

olo

20

-10/too

olo

2O

0/o

o/o

2O

1

0/l

0o

o/o
o/o

5o/o

o/o

5

o/o
o/o

o/o

o/o

o/o

o1o
o/o

o/a

o/o

o/o

o/o

Oil

poper
Oil poper
Oil

poper

Electrolytic

Electrolytic
Slyroflex
Styroflex
Styroflex

Styroflex
Ceromic

Cerqmic
ftletolized
Metolized
Electrolyfic
Eleclrolyfic

Elecirolytic
Ceromic

Electrolytic
Metolized
Electrolytic

Electrolytic

Electrolyfic
Tontolum
Sfyroflex
Styroflex
Metolized
Electrolytic
Electrolytic

Sfyroflex

Styroflex

Polyester
Polyester
Ceromic
Ceromic

Electrolytic
Polyester
Polyesfer
Polyesler

Polyester

filetolized
Po

lyeste

Pol yester
Eleclrolytic
Electrolytic

Metolized

Polyester

Iectrolytic

E

Eleclrolytic
Melolized
Styroflex
Styroflex

Styroflex
Slyroflex
Electrolytic
Electrolytic

Electrolytic
Ceromic
Electrolytic
Metolized
Elecfrolytic

rype

r

poper

poper

poper
poper

poper

poper

poper

poper

5O
60

l9
33,3
l9

33,3

c/s
c/s

kcls

kc/s

kcls

kcls

Notes

operotion

operofion

filter

filter

filter

filrer

.)

n

IF

Ref. No.

c I 53-1 2C
ct54-t2C
cl55-l2C
cr56-l2C

2C

cr 57-I
cl59-12C
cl60-'l2c
ct62-12C
cl63-t2c

2c

cr 65-l

2c

cl66-1

c\67-l2c

2c

cr 68-l
cl69-t2c
cr70-l2c
ctTt-12C
c172-l2C
c173-12C
ct74-t2C

cl75-12C
c176-t2C
ct77-12C
cl78-l2C

ct79-l2c

2c

c

I 80-l
c181-12C
cl82-12C

2C

cl

83-1
cr84-l2C
cl85-l2c
ct

86-l2c

cl87-12C

-l2c

c30l

c302-l 2C

I 2C

c303­c304-12C
c305-l 2c
c306-l2c

2C

c307-l

I 2c

c308-

c401-12C
c402-12C
c403-l2c

c404-r2c

c405-12C

c406-12C

c407-12C

2c

c408-l

-l

2c

c50l

2C

I

c502-

2c

c503-l

c504-12C

2C

c505-l

-l

2c

c60l

c602-l2c

2C

c603-l
c604-12C

2c

c605-l
c606-l2c

pF

80

pF

25
5pF

100
3300
2,5

ILF

pF

80

,l

lrF

,r

FF

80

$F

,O22ltF
,15
,047
,015
,OI
,1

FF

,15

2,5

VF

ptF

2,5

500

,l

FF

pF

80

pLF

2,5

,ol

180

pF

40

pF

25
I80
40

ILF

p"F

25

pF

68

pF

68
2,5 ptF

,01
,047

2,5
lff)
500pF
320

I 000

2,5

,ol

,o47
2,5
I 00

500pF
320

I

000

,ol
4pF

,68
,l
,l
,ol
,O22
,ol
,O22

80
80

pF

pF

pF

pF

pF

pF

pF

pF

pF

IrF

ltF

ptF

pF

vF

$F

l\F

trF

pF

pF

1tF

ptF
gLF

pF

pF
pF

ptF
pF

ptF

prF

Vt

pF

pF

ptF

Pr"F

Desc

riplion

25V
25Y
20Y

16QY 2,5010

V 20

500

-1o/1@olo

64v

25V

25OY

2Oo/o

25OY 2Oo/o

25V
l0OV l0o/o
IOO V
IOO V 5o/o

tooY 2,50/o
25oY
25OY 2Oo/o

'lOO

600 V 2Oo/o

25OY 2Oo/o

250Y 20o/o
500 V

V
64v
64v

25Y

v

64

2,5V

5olo

2Oo/o

5

-1o/r@olo

-10/lo1o/o

-lo/loo

lOo/o

r5lr8 v

l0

500 V

2,5 V

t5/t8 v

V I0

500

l0

5OO V

-l

v

64

25OY 2Oolo
25OV 20olo

-Io/roo

64 V

35140V

20

400 V

6,4Y

25V

-10/too

v

64

250Y

20olo

25OY 2Oolo

-10/l

64 v

35/40 V

4OOY

20olo

Y

6,4

25V
25OY 20olo
400 v
100

V 20
25OY 2Oo/o
25OY

2Qolo

25OY 2Oolo

20olo

250Y
25OY 2Oo/o

V 2Oolo

250

125 V 5olo
125 V 5

o/o

o/o

o/o

o/o
o/o

o/l oo

o/o

oo

o/o

o/o

o/o

o/o

o/o

olo

o/o

Type

Electrolytic
Elecfrolylic
Tonlolum
Styroflex
Metolized

Electrolytic

Electrolyiic

Polyester

Polyester

Electrolylic

Polyester

Polyesier

Polyester

Polyester

Melolized

Polyester

Polyester

Electrolytic

Electrolytic

Metolized

Polyesier

Elecirolylic

Electrolytic
Mefolized
Ceromic

Electrolyiic

Electrolytic

Ceromic

Electrolytic

Electrolytic

Ceromic

Electrolytic
Metolized
Polyester
Polyesler
Electrolytic
Metolized

Electrolytic
Electrolylic
Electrolytic
Metclized
Polyester
Polyesler
Electrolytic

W99

Poper
Electrolytic

Eleclrolyti

Metolized

lectrolylic

E
Electrolyli
Polyester
Polyester
Metolized
Polyester
Metolized
Polyester
Slyro{lex

Styroflex

poper

poper

poper

poper

poper

poper

poper

c

poper

c

poper

poper

Notes

I

I

j,'rr"or."o

Itntroduced
llntroduced

l,^t-0"."0

from seriol

from seriol No.733051

from seriql No.734501
{rom

seriql No. 733051

I

seriql

from

lCrt".s"a

I

1.r"""., from seriol

I

seriol

Chonged
Chonged

from
from seriol

No.7345ol

No. 749500

No.74e5oo

No.748700
No.748700

<1

*[

"4-[

st

@u

-{n-isz-F<

:tr

,b\

-m:s:-F-'

tt :

5

.--@-

*il

__{Fr"-.-*l;x

-q

106-l

^t

^x

$;

I

fl;

, *rF

.{Rr.?l.

flB

-!

@s

Gl-l

l. I

r rlE-I.

*(

52

Amplifier boord,

Fig. 58.

printed

side.

Fig.59.

The power

outPUi

omplifier

boord,

component

side.

Used

on tope recorders

c

308

below

seriol

No.749500.

Fig.60.

The power

outPut

omplifier

boord, component

side. Used

on tope recorders

qbove

seriql

No. 749501.

53

7
I

I

l

l

I
l

[^

Fig.59. The power

fr

l-,"1
?

t

305

0

ouipui omplifier

,ffiA

#"'\i

,

boord,

component

309

R

-'lul

.la!f__Lsrf-4li.n

I

side. Used

on tope recorders

'-{---l*

--T,,d*,

below

seriol No.749500.

t

rq'

V r

-a ni [l

.i_-}.l

lAl I

-r-

l.ro, I
I lr

#o

c 308

"d

L"!*

R 320

n

.?

C303

lU

:.

B

Fig'60. The power

o

outpuf omplifier

boord,

component

side. Used

ontope

recorders obove

seriol

No.749501.

53

Y

Fig.62.

Fig.6t. The rectifier boqrd

Record/ploybock

ond the indicotor boord.

heod circuit boord, input boord ond erose

componenl side.

heqd circuii boord, componenl

+

.l

side.

o

o

E

AAA*An

B

\7\t\vqruc

AC

128

152

2848

u
u

/t

28t8/2

Fig.63. Conneclion of

115

BC

6001

5E

6002

sE

the lronsislors

AC127 AC

from underneoth.

seen

107

BC
8C109 B BClll

B BCll3

4001

5E

3962

u

H]GH LEVEL

t?

*

R 119

|

'Rtl6

K

6E

o 104

109

BC

A 111

c

p

ll00

x

R

105

l0l

c

I

tor

c

100!

OU

cH

lPUT

cH2

R 106

27A

l

2

5!+

R

IIO

58 K

R 112
56h

2

K

1.5

R 120

2,2X

BC

o

2,1

105

r09

123

c
0,15!

B

106

o

8C

R 125

tjg

620

O.l!

cR lt3

1op

R 132

33

12

0?

!|-

I ro=

81il -.r'

i r, |

R t3l

120

-

''

li

130 c

R

25y

t82

36

R]

33

R 140

43K

1?7

c

0,1!

c

c

2,5v

lto

ill

c t32

t,t

R 113

130

--r

E

t33

c

80!

25V

o 10!

KW/l

-

!

LOw

HIOH

LEYEL

MX FILTER

ADJ.

8tas
AOJ

-

roop 20-250e

}I

t9 kft
F LIER

ns

i

'22K

ij l"'

=

:_'?iL

: PLUG

220

c

25

25V

R 151

100 K

c 117
100

K

146

t:

c 1t3
180 p

!

F

I156

27X

r57

roK u Iq

ac 113

T\

=c

t5l

3r00e

2,5y

nrzt*

2.1X

c 153

Eo!

25V

I54

c

25v

3

|

crs6,J_

1000p T220R

i(R

R 173

3,9

R 171

820

X

o

Rt7

5, tM

1'17

R 177

62 0

c
0,15

R

167

33

199

R 165

153

.c

0,0t 5

R 187

33

l3

!

Frq
5r0

: 172

5'h

0,r5

!

*n

170

c

R t92
224

:1?\
2,1v

t9

130

-f-

K

L-

t7€

c

:0,1

o12

Ic

rrs

'500P

R

ls:

IX

X DEPOSITED

CARBON

RE:

EOUAL SWITCH

11)

o 305

AD ]50

R

320

t00

lav

3r9

\R

| 0,17

o 306

AO r50

0v

-

i.sk9

r

l9?

t?0(
J*

111

l,5tl

\R8ON

,l

lffi

ffi

RESISTORS

c

_r1

!o^o^o
"".=l

"..,r,.;;-

"'"'l-'--

c604r
0,022!:t

=

nqtrl

I

lr'

111',tgA

r!fifr.ElD

voron

!

j

Bz

60

Cl : I,lf

c 105

l5v l00p

R 404

404

c

R 406

22X

R

402

E2

Sp.cilicotions
lor th. iollo*i€:

R r48,R149, Rr50: l006hm

11?: 1000Fn

C

120: 150-7!0pl kdo.r

C

I

.o

l.o.lwo-lrod

Gcillolor ironsldD.r T I

f;,g--6J.ql

R 408

? 403

K

ll0

t0K

r30
NIC

r.o2

407

R

t00

c

407

t?0!

MoDEL

12-2(two trocks)

12-4

os Mod.l

two-

lrock .roe. h.od, md.l 4l H

r.<ordlploybock h.od,nod.l

(fo!.kocks)

?s""t

l

NO

6318-3

o 501
8Zl 25

502

u 1818

l2

5PEAKER

LECIOR

5 E

Sensrl vrty, 1!0cls

0,J5 d

91'

/

r50

60
05

550

519
130

v

500

6.3

7s

J2-1

€xept

]

r

65

"

0,6

Lv

5

_q

ii

7

:o

/

-!

410

9

]L!

il

t0

2,1

tl

2 5 mv

a

rr,

90

t,2 v

Iondbrrgs Rodroiobrikk

IH

TAPE RECORDER MOOEL

DRAWING NO 11118-4

,

?,2
2q1

?0il

t00,
600,
600,

,

110

1q/

6,1

0rc r55

Fio.64

LUBRICATING
The molor:

The motor

3000 hours
The upper and lhe
with a Teresso

should be

of use.

oil

lubricated after approx.

bearing should be lubricated

lower

43 or 47 from Esso.

every

The selfJubricating
The

T

I

t

:,

turntables,

wheel
should

be necessary

use Teresso

Note: Utmost care must be taken

are mounted in
usually nof

oil 43 or

use

only one

bearing. Excessive oil might

the

friction drive.

bearings:

flywheel,

the

lubricated. lf, however, it should

be

to lubricafe the bearings for any

47 from

fraction

and ihe speed

self-lubricating bearings

Esso.

while lubricating,

of a drop of oil

seriously

for each

transfer

and

reason

affect

/W

,ffi

4

6

Fig.49. Special tools.

Tandbcrgs

Radiofabrikk A/S, Kjelsas

Tandbergs Radiofabrikk

A/S, div. Kjeller

TANDBERGS

P.

O.8.9,

RADIOFABRIKK

Korsvoll,

Oslo

8, Norway

AZS