Tandberg 3000-X Service manual

TANDBERG

Series SOOOX

SERVICE

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Contents

1.0 TECHNICAL SPECIFICATIONS

MECHANCIAL ADJUSTMENTS

2.0

2.1

Clutches .....:.

2.1.1 Take-up Take-up Turntable

2.1 .2

2.1.3 Supply

2.1.4 Supply

2.2 Brakes

2.3 Pressure Pad Adiustment . .

F

2.4 End

ALIGNMENT

3.0

3.1 Demagnetlzing

3.2

4.0

TAPE

4.1 Visual Check

4.2 Mechanlcal adjustment ol

5.0 HEAD ALIGNMENT WITH TANDBERG TEST TAPES, MODEL 3041X

5.1 Playback

5.2

5.3

5.4 Erase Head

5.5 Model

HEAD

6.0 TEST TAPES, MODEL 3041X

6.1 Playback

6.2 Record

6.3 Bias

6.4 Erase

6.5 Model

Stop

2.4.1 Tape Feeler Tension

2.4.2 Adjustment of Tape

Blas-

and Erase Circuits

3.2.1

Oscillator

3.2.2 Erase

3.2.3 Bias Current

PATH

5.1.1 Height Adjustment

5.1.2 Azimuth Adjustment Record Head

5.2.1 Height Adlustment by Inspection

5.2.2 Height Adjustment by Track

Measurement . ....

5.2.3. Azimuth Adjustment ...

Bias Head

5.3.1 Vertical Adjustment ....

5.3.2 Height Adjustment

5.3.3 Horizontal Adjustment

5.4.1 Height Adjustment

5.4.2 Azimuth Adjustment 3021X .

ALIGNMENT WITHOUT TANDBERG

Height Alignment

6.1.1

6.1.2 Azimuth Alignment .

Head

Head .

6.4.1 Height

6.4.2 Azimuth Adjustment 3021X

Turntable

Turntable Turntable

Mechanism .

.

Frequency

Voltage

head

.

Head .

Head

.

Adjustment

.

Feeler

. . .

tape

Visual

...

path

. . .

10 10

10 10 10 10 10 10 10 10 10 10

7.0 TRACK

7.1 Model

4 4 4 4 4 4 5 6 6 6 6

7

8 8 8

I I 9 9 9

7.2

ADJUSTMENT

8.0 THE

8.2

RECORD/PLAYBACK

9.0

9.1

9.2Dlstortlon.... .........12

9.3

10.0 MoDrFtcATroNS ... 15

9

I 9 9 9 9 I I

10.1

10.2 Modification lrom

10.3

11.

LUBRTCATTON . ...... 15

12.0 ILLUSTRATIONS WITH REFERENCE

PART NUMBERS .. ..... 16

13.0

SPARE

13.1 Mechanical Parts . .. ...

13.2 Electrica! Components . . .... .

14.0 TABLE

MODEL 3OOOX

15.0 BLOCK DIAGRAM FOR

16.0 PRINTED WIRING BOARDS AND WIRING

DIAGRAM

16.1 European Version

16.2

CONTROL

3041X

7.1.1

Record Head

7.1.2

Erase Head .

7.1.3

Playback Head

Modell 3021X

7.2.1 Erase

7.2.2 Record

7.2.3 Playback

AMPLIFIERS

8.1.1 Playback Level

8.1.2 Adjustment

8.1.3 Record/Playback Level

8.1.4 Record/Playback

8.1.5 Distortion

8.1.6

Control

Tape Speed Control

8.2.1 Using Frequency Meter

8.2.2 Using Transformer Tube Voltmeter ..

8.2.3 Using Tape of Known Length

Readjustment Control

Ampliliers

9.3.1 Playback Amplifier ....

9.3.2 Record Amplifier .........

Modilications from

50/60 Hz Operation . .. . 15

TrackVersion... ......15

Component Modification in Series 3000X 15

PARTS LIST FOR MODEL 3OOOX .. 22

OF

.

Head .

Head

AND

CONTROL

Adjustment ......

Bias

of

of Playback

CURVES

Record/Playback

ol

Playback

of

TRANSISTORS USED

and Record

Four-Track to Two-

MODEL SOOOX . ... 28

OF

Current ...... 11

Curves ... ..... 11

Amplifier .... 1'l

and

11511301230/240

Adiustment 11

........ 11

or Counter 12

Vacuum

...... . 12

.... ...

IN

10 10

'10 10

11 11 11 11 11

... 11

11

.... 12

..... 12

Level

12

12 12

...

13

V,

22 26

28

U.S.

Version

30

1.0 TECHNICAL SPECIFICATIONS

POWER REQUIREMENTS:

POWER CONSUMPTION: MOTOR: TAPE

SPEED:

TAPE:

WINDING

PLAYING TIME, MODEL 3021X:

PLAYING TIME, Four track MODEL 3041X:

TIMES:

115-130-230-240 V. 50 or

connections. 45 watts. Asynchronous.

17le ips,

Maximum reel diameter 7". Low Noise Tape and

1200 ft.

1800 ft.

Two track

7t/z ips: 48 min.

33/,r

17la ips: 192 min. 2 X 192 min.

71/z ips: 2 x 48 min. 4 x 48 min.

33/r ips: 2 x 96 min. 4 x 96

17le ips: 2 x 192 min. 4

33/r

for

adjustment

of of

ips:

Hz

60

ips

tape; tape:

recording on 1800 ft. of tape.

Stereo Mono

96

recording on 1800

Stereo

and

131 min.

2t/z

min.

7tlz ips.

procedure.

min.

x

2 2 x 96

48 min.

ft. of tape.

x

operation. See chapter 10.1 for voltage

min.

Mono

min.

192 min.

only should

be

used

for

recordinq

Wl

cl A

SPEED

HEADS: Separate heads FREQUENCY RESPONSE: 7t/z ips: 40-20.000

ERASE AND FREQUENCY:

INDICATORS: Moving

AMPLIFIER

TAPE DISTORTION:

TOLERANCE:

BIAS

DISTORTION:

-+

1,50/0.

for

ips: 50-16.000 Hz

33/r

17e ips: 50- 9.000 Hz Measured to DIN

7t/z ips: 4O-22.0O0 33/r ips: 40-18.000

17la ips: 40-10.000 Amplifier 85,5 kHz. Distortion

mum Record

0,5

Playback Amplifier: 0,3

A tape

distortion A tape than

position:

coil meters. Optimum

o/o

3

distortion.

Amplifier: Recording of

0/o

distortion

recorded

in

recorded with

0/o

0,8

45511:

50-18.000

from recording

with a 40O Hz signal at 0

playback.

tape distortion

erasure, recording,

-+

Hz

Hz Hz

2dB

-+-

2dB

-+

2dB

Hz

-+

Hz

less than 0,5 %.

recording level:

a 400 Hz signat at 0 dB

amplifier.

0/o

distortion

a 400 Hz

signal 8 dB below 0 dB on indicator,

playback.

in

3 dB

at 0, 75 V output

playback

dB level,

and bias

Deflection up to 0 dB at

(Tandberg

level,

voltage.

gives

less than

Cross-field).

gives

less

30/o

gives

C

!

(

fi

(

maxi-

than

tape

less

i

-

a

WOW:

CROSSTALK ATTENUATION:

INPUTS:

OUTPUTS:

W.

R. M. S.:

7t/z

ips 33/r ips 17le

ips DtN

45511 :

71/z

ips - better 33/r ips 17le

ips

At

1OOO

Mono

Each

1.

Microphone 200-700 DIN

2.

Line input

400 Hz: 100

3. Line input

400 Hz:

channel:

Emitter

SocKetS, Minimum signal

jack

for connection Stereo version and

RIGHT.

better

-

Hz:

60

)

channel has the following

socket.

follower

OUTPUT

load

at 0

jack

stereo

than

better

than

better

than

better

lhan

better

than

dB

input for

ohm. Sensitivity

US-version,

for

high

mV.

for low impedance

mV.

5

Pin 4, right

outputs,

LEFT

impedance:

dB level,

is connected

jack

o/o

0,07 0,140/o 0,280/o

o/o

0,1 O,2o/o 0,40lo

Stereo

dynamic low impedance

Telephone

impedance

Maximum

Maxirnum

channel.

RADIO DIN

and RIGHT.

100 ohm.

gives

approx.

of

headphones.

in

is

connected

SO OA

)

inputs:

at 400

parallel

Hz: 0,1 mV.

jack.

source. lmpedance: 1

input level: 20

socket

Output

RADIO

with

lmpedance:

with

source.

input level: 1 V.

US-version:

0,75 V in

parallel

microphone.

Maximum

Phono

V.

DIN

Phono sockets

pins

level:

playback.

phono

sockets,

57

socket RADIO:

3 and

A

tape recorded

socket

sockets

lmpedance:

input level:

Mohm.

LINE lNpUTS.

kohm. Sensitivity

LOW

5. US-version:

HEADPHONES, pins

and

3

OUTPUT LEFT

25 mV.

Sensitivity at

Pin 1, left

lN.

with 400 Hz

5.

On

at

phono

stereo

US-

SfGNAL TAPE/NOISE WEIGHTED

(GERAUSCHSPANNUNG):

SIGNAL TAPE/NOISE UNWEIGHTED (FREMDSPANNUNG):

SIGNAL/TAPE

SfGNAL/TAPE

NOISE:

Wetonreo

(lEC

A-CURVE)

DfMENSIONS: WEIGHT:

R. M.

S.:

Peak

value measured

tape

distortion:

4-track 54

dB

Peak value distortion:

4-track

51 dB

Measured linear

4-track

57 dB

Measured at

4-track

62 dB 64 dB

Note:

At

noise)

Length: 151/2"

(9,1

20 lbs

2-track

56 dB

measured

2-track

51 dB

2-track

s7 dB

tape speed

z-track

0/o

3

distortion

are reduced by 2

(39,4

kg).

according

according to

R.M.S.

cm),

to DIN 45511

DIN 45511

at tape speed

7t/z ips and 5

all signal to noise

dB.

heigth:

6t/2"

7'lz ips

0/o

(16,5

at tape speed

at tape speed 7t/z ips

o/o

and 5

distortion:

ratio measurements (Signal/tape

and depth:

cm)

71/z ips

distortion:

123la"

(31,6

and

5olo

and 5o/o

cm).

2.0 MECHANICAL

ADJUSTMENTS

2.1

Glutches

Control Note:

2.1.1 Normal

Set the position

in

of

All

controls and ried out horizontal

All

tig. 2.2

control. trol of supply

Take-up

Forward Winding

operating lever to

v.rith the motor running. The

table tig. 2.3,

0.5 - 0,9mm (0.02t'

-

0.035'r

Winding

controls

Torque

measurements must

with the tape recorder

position

which

Take-up

Turntable

pos.

)

and

accomplished

are

presents

turntable

turntable, reverse the

Torque

1.

Ensure that the

be car-

placed

with empty reels only.

shown

as

two optimal modes

is shown. By con-

figure.

Normal

Forward

torque is

drive

read

clearance

between turntable 0,5--O,9 mm screw

A as shown

in

2.1.2

Take-up Turntable

in

Fast

of

Forward Winding

The

torque is read in

torque deviates

check and, 263737B. Ensure that

on bushing

2.1.3

Supply Turntable

Tape

Tension

The

torque

2.1.4

Supply Turntable

Fast

Reverse The torque is read in table fig. torque deviates check

and, if

2618054.

polyurethane

the

and friction

(0.02"-0.035").

in

from the

if necessary,

there is

2640834

read

is

Winding

lrom

necessary,

See fig. 2.5.

friction

disc 991009

lf

fig.

2.1.

Torque

table fig.

specifications

alter the

a clearance

and lever

in table

Torque

the specifications

alter the

necessary,

2.3, pressure

between the

991013.

2.3,

fig.

2.3, pressure

pads

lays

pos.

in

See

pos

pos.

in

under

between

adjust

3. lf the

the table,

of

spring

studs

fig.

2.

3. lf

the

table,

of

spring

the

2.4.

the

*

1

Pot

2

Pot

3

,l

I

a

I i

( i

991017

9910r3

261841 2673?38

Fig. 2.1 .

mm

30

2640834'

radius

991009

The difference between Fast

Reverse (measured

1309 at 80 mm radius). lf necessary, alter the spring 261805A

Winding

at 30 mm

(fig.

80 mm

Fast Winding

Torque

radius),

2.5),

or spring

radius

should be less than

509

or

2673738

Torque and

(measured

pressure

(fig.

ot

2.1).

t

Fig 2.2.

Table for Winding Torques

Torque

tit

winding

Pos

tape rensron

2

Pos

Fast winding

3

t

*

After a longer

increase of the torque as normal.

Ensure in the

table

position,

cal turntable.

periode

that the

by

and with

of continuous operation,

by 2G-30

torque is within the

running

the tape recorder in vertia tull 7" reel on take-up

0/o

is

considered

specifications

Fig. 2.3.

an

C

mm

30

radius

at

Torque

at

80 mm

radius

159-

309-

o- 8g

909-250g

264930

Fig. 2.6.

991 01

?

2.2 Brakes

See fig. 2.6 Set the operating lever to Normal

position. brake

I

min 0,lmm

(0.004,')

Fig.

2.4.

lf necessary,

Set the operating lever to Fast

Fast that the of the hinged

lays between

adjust screw

The adjustment

tables.

Check

pad

and the turntable is

Reverse Winding

clearance between screw

A

251489

that the

adjust screw D.

delrin 0,5-1 mm C.

procedure

clearance between

position

parts

on

(0.02"-4.O4"

operating arm 991017

is

Forward

approx 1 mm

Forward Winding

respectively.

C and the bottom

).

for both turn-

equal

(0.04").

Ensure

lf

necessary,

drive

the

or

@

261 805A

Fig.

2.5.

Fig.

2.7.

Pressure Pad

2.3

the

Set clearance tape rest 254844A shown by bending See

operating lever

between

in fig.

2.7.

the arm

fig. 2.8.

Adjustment

to Neutral

pressure

the

should be approx. 6,5 mm

lf

necessary, adlust the clearance

254025 with

2.8.

Fig.

position.

pad

990325 and the

pair

a

(tlr")

of

pliers.

The

as

2.4

End

2.4.1

Tape

The

feeler tension

tween

modes. by lig.

8 and 10

Adjustment of

tightening or

2.12.

Stop

Feeler

Mechanism

Tenslon

against the tape should lay

g (0.28-0.35

the

tension is

slackening the spring 243990.

Fig.2.10.

in drive winding

oz)

be-

accomplished

See

I

l1

a

( t

a

I

a

the operating

Set position.

rest should

of the

end

lf

necessary, adjust the

spring

268062

zzl

pressure

The

be 80

pressure

with a

252754

g

/:\

(@,

tM3l4

lever

(2,8

pad pair

Fig. 2.9.

Normal

to

at the

-+

ozl

arm

pressure

pliers.

of

80s

12.82

l,

a-\\

',-/

Forward drive

pad

against the tape

0/0,

10

measured on the

254025. by bending

See

!

ozl

See fig.

fig. 2.10.

2.9. the

2.4.2 Adjustmenl of Tape Feeler fig. 2.11 and 2.12.

See Set the operating tion. The be inserted. position feeler side of the polished loosen until the position

When the

should open, the space

266741 Check tape feeler at

mains

where

slowly

tape contact surface

screw

motor starts when the tape specified above. Then tighten

is minimum

the switching on

lever to

switch is set to ON. No tape should

The tape feeler will

the

through the

feeler is

F, and move the microswitch slowly

tape feeler is released,

and switch off

between

both

Normal Forward drive

motor

0,5 mm

is switched

guide

min. 0,5

the

tape

(O.O2").

and-off

fast

winding

the

posi-

therefore post.

mm

of the

motor current when

feeler

modes.

rest in

off. Push

When the rear

(0.02")

the microswitch

See positions

from

guide post,

feeler is

and the arm

in

the

screw.

fig. 2.12.

of

the the

the

Min

0,5

(o.02"

Adjustment Juste ringsavstand

mm

l

distance

minimum

266741

mm

0,5

243990

(0,02rr)

v

2.11.

Fig.

3.0 ALIGNMENT

It is

important that and the heads on the tape recorder is obtain optimum results on new tapes

the tape should be run

approx. 5 times at normal speed polished

and

3.1

Demagnetize aligning

Move

gap

account be touched, the the Start coil right above the flywheel.

Note:

before

signal-to-noise

the

Demagnetizang

the

the heads.

the demagnetizing

at short distance.

performance. capstan for a

tape

the

not

Do

least

at

the contact between the tape

(Low

tape recorder

through

measuring

ratio.

heads

Hold

recorder and

switch off the demagnetizer

3 feet away

and

coil slowly

The head

as scratches are

the

few

seconds.

from the tape recorder.

the

to have the tape

the frequency response

adjacent

surface

demagnetizing

hold

parts

past

detrimental to

demagnetizing

the

good.

Noise),

before

the head

must

on

coil

until it

To

no

near

is

Fig. 2.12.

Bias-

3.2

Oscillalor Frequency

3.2.1 Connect a calibrated

256.5 kHz), frequency meter

the

oscillator around the erase head. frequency to

3.2.2 Erase Voltage

Set

the connect a VTVM to upper half of the erase head by means of should be 80-120 V.

voltage appears across

Set the tape and check erase in

stereo

similarly for

Bias

3.2.3 Set the tape

measure the

head by means

22 Y by means

lower

R

502. Demagnetize heads

and Erase Circuits

long wave receiver

by means

kHz by means of

85.5

tape recorder

low-capacitance

a

Then

recorder for

voltage

the

head.

recording

head-half and

deviation from

The

should not exceed 10

recording on channel

Current

recorder for

voltage across upper half of the bias

VTVM. Adjust

of a

of R 501 . Check the voltage across

adjust to

(tuned

frequency

or

pick-up

of a

Adjust the oscillator

for

stereo recording

probe.

check ihat the same

lower

head-half.

recording

across upper half of

voltage

the

stereo recording and

22

tape

and

loop

C 508.

The voltage

on

R.

the

Y by

path.

counter

channel L

measured

V.

voltage to

means of

placed

and

the

Proceed

to to

TAPE PATH

4.0

4.1 Visual Check

the recorder with a tape,

Load operating position. the head record parallel Operate tape rubber without pressure the the tape touches the flanges of the when the recorder is in normal as the drive mechanism is engaged. The however,

lever

slowly

Check that the

height adjustment

guide

plate,

base

head. to the

runs within

Also check that record

the

start/stop

wheel.

posts

by no means bulge at the flanges.

to the normal

bias head

screws

presses

nor

head.

knob, and

the rims of

flickering on

Check that

is correct.

lt

(C)

the

neither

height

can be tolerated that

forward

4.2 Mechanical Adjustment

Prior to the electrical adjustment of essential to make the tape run without movement Put a tape normal way forward drive

pressure

of shown in tig. 4.2, until the tape is running evenly

through the

free

and set

position.

roller

path.

from damages on the recorder in

the operating lever to normal

Adjust

990334

the azimuth

with a

move

and

forward drive

neither touches

on the record

tape against the

bias head is

check that the

pressure

side of the

positioning

guide posts

tape

Tape Path

of

heads, it is

the

screw

the

wheel

of

drive, or

must,

sideways

position

driver as

through one of the adjacent Align adjust run

the rest of the

to the capstan.

guide posts

pressure

perfectly.

(

990334

Fig. 4.2. Azimuth

flanges

2,

roller

path,

tape

guide post

the

of

3,

and 4 similarly.

spring

adiustment

234478 to make

ol

slightly

lf necessary,

pressure

touching

1

located

the tape

roller.

5

$,

a

tc

5. P

pl al

al

hr o el

tt

5, P

p

a

b ir

E

5

4

Ir

ft tt

h n v tt

I

F

C

( c

v

I

(

I

Fig. 4.1 . Tape

MD

path

adiustment screws.

HEAD ALIGNMENT WITH

5.0 TANDBERG

MODEL

TEST

3041X

TAPES,

rg

)d

v,

)e

Playback

5.1

the recorder

Set a VTVM to each

position

to

Helght

5.1.1

Tandberg

Play prerecorded

and with area approx. 30 dB. Adjust the height of the head by means output endeavouring to maintain the headfront the tape.

5.1.2

Play prerecorded

al 7t/t ips. back head by indication

5.2

5.2.1

forward to run head, necessary, while endeavouring to maintain to the tape.

is

obtained from track

Azlmuth

Tandberg

on the VTVM is obtained.

Record

Height

Insert a new

drive. Check

parallel

with

Head

stereo

for

of the outputs. Output selector

one

STEREO.

Adiuslment

test tape No. 1. This

tape with 1.000 Hz recorded at

corresponding to track 3

the

of

Adjustment

test tape No. 2. This

tape with 10.000 or 15.000

Adjust the azimuth

means of the screw

playback

screws

3

position

and

is

(A)

until minimum

(channel

is

Hz

(B),

until maximum

Head

Adiustment by Visual

tape, and start the recorder

visually

with the upper

play

a

adjust the

of approx.

height

Inspectlon

that the tape

track of the record

mm

0.1

with

screws

the headfront

a full track reduced

a full track

of the

connect

71/z playback R), while

parallel

recorded

play-

in normal

appears

(4

mils). lf

(C)

fig.

parallel

ips,

by

to

4.1

5.3 Bias Head

5.3.1. Vertlcal Move

the operating lever slowly to forward fronts

necessary, bend required.

5.3.2 Height Set the tape

unscrew Connect a VTVM halves. adjustment screw on the voltpeter. the is

the

position clearance

plate bias head slightly.

5.3.3 Horlzontal Adjustment Connect a

fig. Then screwdriver towards the voltage maximum.

,

of

groove

sufficient clearance between the

mounting

for the

head-halves, recording. Insert a

4.1, and pull

side until maximum. When tighten horizontal output voltage. the

horizontal

Adjustment

position

drive

bias-

and record heads are

Adjustment

recorder

locking

the

Move

in lront

plate

the bias head is not critical, and if the

of

between

record

VTVM

and set the

pull

the

bias head carefully

(bias)

the screw

in recording head increases to a

Continue

the

bias is reduced by 10-150/o below

position

lf

procedure

normal

the

and check that the head

the arm of the bias

stereo

in

screw

across each one of the record

bias head

(M)

for the

Check that

of the

for

the

the bias head and

head is insufficient, raise the

across

the bias head to the right.

the

of the head.

a noticeable change has

each

screwdriver

pulling

position

(H)

while

has

record mode,

(H)

fig.

4.1, about

up

or down by

highest

the

tape runs

bias head

record head. The height

one of the

tape recorder for stereo

in

left

hand side. lnduced

the

head towards

has

maintaining correct

Then

to be repeated.

parallel.

head

means

possible

that there

and

head and

bias

mounting

the

groove

means of the

by

been

recheck

r/z

reading

freely

occured,

as

and

turn.

head

of in

record

l,

ref.

left

found,

the

ll

Height

5.2.2 Record

direction,

one of tape oxyde will then

in

lighter shade. Fig.7.1

on

the

positioned

is

Adjust as above

ment.

5.2.3 Azimuth Load a new

at tape speed Set OUTPUT

RECORD

both the

output.

(D)

for

taneously,

Adjustment

in stereo,

then in the

and

dip it

powder

by visible

tape

maximum

or best compromize.

into

and alcohol

and the

either

and

Adjustment

tape into the tape recorder

7tl2 ips a 15.000

selector to

LEVEL knobs for

Adjust

by Track Measurement

above normal level,

well

opposite. Cut off a length

a solution

four

as

shows the correct

patterns

too high

perform

the record head

output from

of

(Magna

dark stripes

obtained

or too

new track measure-

a

Hz

position

approx. 150 mV

both channels simul-

first in

grained

fine See). The tracks

with

when the

low.

and record

signal

STEREO. Adjust

azimuth

iron

spacings

pattern

head

in stereo.

at

screw

Erase Head

5.4

5.4.1 Helght By visual

(10

mils) of the upper half of

visible

No. 9 and record a 400 Hz above normal

tape in a solution of fine

and alcohol recorded track. are

erased,

height

(L)

and

5.4.2 Azlmuth Check that

perpendicular adjust ref.

fig. 4.1.

Adjustment

inspection,

above the tape. Insert

level

(Magna

is

track

sure that no

Make

see fig. 7.2. lt necessary,

of the erase

fig.4.1, and

ref.

Adjustment

the head

to the

azimuth

position

This

check

on channel

grained

solution).

See

positioned

parts

head

by repeat

front

mounting

by

adjustment

that

approx.

the

erase

Tandberg test tape

signal

in

means

ol the

means

is not

at 7tlz

(track

R

iron

oxyde

Check

centre of the

the

of

adjacent

of the screws

the

above

erase

plate.

lf

of the. screws

critical.

0.25 mm head is

ips well

Dip the

3). powder

that the

erased

tracks

check.

head

the

(K)

is

(K)

adjust

necessary,

<

5.5 Model 3021X

The

alignments

the model

5.1.1, which is superseded

5.2.1 , which is superseded

HEAD ALIGNMENT

6.0 TANDBERG

specified in

3021X with the exception of

TEST TAPES,

para.

by 6.1.1 and

7.2.2.

by

WITHOUT

MODEL 3041X

6.1 Playback

6.1.1 Helght Alignment

The

height of the

height

adjustment

edge of the tape shall run

of the

6.1.2 Azimuth Alignment Set OUTPUT selector to

Play a VTVM connected to each output. tion screw obtained on the output meters.

head

back a standard

playback

the

of

(B)

Head

playback

screws

lamination

fig.

ref.

(A), ref.

flush with the

for channel

position

azimuth

head

by

4.1,

until

head is aligned by

fig.

alignment tape with

the

azimuth

maximum reading is

valid

are

5.0 paragraph

paragraph

4.1. The upper upper

L.

STEREO.

Adjust the

adjustment

for

the

part

posi-

7.0 TRACK

7.1 Model

7.1.1 Record Head Record a

optimum 1 and 3 for make a the tape

iron oxyde to the recorded across the tape, ref.

position,

alignment.

7.'1.2 Erase Head

lnsert a

1.000 Hz recording level in mono

the tape Check

of position

similar

make

signal

that

the erased area,

of the erase head

CONTROL

3041X

Hz

1.000

recording

and

powder

the

if necessary, and recheck the

full-track

and

signal from

level

approx. 5 seconds. Turn the tape and

recording

dip it

into

and

recording visible.

tracks

the

should

prerecorded

from

dip it

generator,

a

into

prerecorded

ref.

generator

a

in stereo. Record

on tracks 4 and 2. Cut

a mixture

alcohol

be

7.1.

fig.

track

on

the

1i9.7.2.

if

(Magna The spaces between

distributed equidistant

Readjust the height

tape well above

Magna

track

necessary.

fine

of

See

and record a

(channel

3

See

is in the centre

Adjust the

above

well

tracks

on

grained

solution)

azimuth

optimum

R). Cut

solution.

vertical

Record Head

6.2

Follow

6.3

Follow

6.4

6.4.1 The height of the erase

adjustment screws

0.25 track of tape.

6.4.2

Align the azimuth

azimuth should heads. critical.

6.5

The alignments for which is superseded seded by 7.2.2.

7.2.1.

the instructions

Bias Head

the instructions

Erase

Helght Adjustment

mm

Azimuth Adjustment

Head

(10

mils) of

the

erase

adjustment

parallel

be

The

azimuth

head

position

with the

Model 3021X

specified in

model

with the exception of

3021X

Paragraph 6.4.1 is superseded by

(K

the

screws

position

by

given

under

given

under

head is aligned by the height

L) ref. fig. 4.1. Approx.

and

lerrite

should

the

of

(K).

mounting

of

paragraph

Paragraph 5.2.1

5.2.

paragraph

for the

core

be visible

erase

The erase head

the

erase

above

head

plate

head is not

6.0 are

paragraph

5.2.

5.3.

upper

the

by the

for the

valid

6.2

is super-

Too high. Too

Correct

Fig.

Fig. 7.2. Track

7.1 .

Too

high.

Cotrect

Track

measurement

record head.

of

ol erase head.

Too

low.