Teac A-3440 Bedienungsanleitung

TEAC

CORPORATION

51032380

GENERAL

DESCRIPTION

The

TEAC

A-3440

channel,

multi-track

open

reel

tape

deck

which

operates

ips

and

7-1/2

ips.

The

A-3440

development

the

well

known

A3340S

and

many

features

common.

Specifically,

the

transport

section

virtually

the

same

though

there

has

been

extensive

redesign

the

controls

and

the

electronics.

The

FUNCTION

SELECT

switches,

together

with

the

OUTPUT

SELECT

switches

provide

instant

selection

source,

sync

and

normal

off-tape

monitoring.

There

rear

panel

interface

for

the

RX-9

DBX

noise

reduction

unit,

the

use

which

will

greatly

improve

the

dynamic

range

and

signal

noise

performance

the

deck.

The

A-3440

ideally

suited

the

requirements

the

musician

and

multi-track

recordist.

any

the

procedures

this

manual

are

not

sufficiently

clear,

seem

too

difficult

undertake,

suggest

you

contact

your

nearest

TEAC

Factory

Service

Department

write

directly

the

TEAC

Corpo-

ration.

TEAC

addresses

are

printed

the

back

cover

this

manual.

—

TABLE

CONTENTS

—

GENERAL

DESCRIPTION

................

SPECIFICATIONS

AND

SERVICE

DATA.....

TOOLS

FOR

TESTING

AND

MAINTENANCE

PARTIAL

DIS-ASSEMBLY

................

TAPE

TRANSPORT

PARTS

LOCATION......

—

Rear

View

—

HEAD

REPLACEMENT

AND

ALIGNMENT

...

—

Mechanical

—

MEASUREMENT

AND

ADJUSTMENT

.......

—

Mechanical

—

MEASUREMENT

AND

ADJUSTMENT

.......

—

Electrical

—

SERVICING

AND

MAINTENANCE

.........

10.

SIMPLIFIED

SCHEMATIC

AND

LEVEL

DIAGRAMS:

ia:

sece

Speda

11.

TEAC

DECIBEL

TABLES

SPECIFICATIONS

AND

SERVICE

DATA

2-1

SPECIFICATIONS

Track

System

Heads

Reel

Size

Tape

Speed

Motors

Inputs

(Level

and

Impedance)

Outputs

(Level

and

Load

Imp.)

Playback

Equalization

Bias

Frequency

Power

Requirement

and

Consumption

Weight

Dimensions

(WHD)

channel

Multi-track

SIMUL-SYNC

Erase,

Record/Sync

and

Playback

10-2/1'’

and

7”

ips

and

ips

DC-Servo

Capstan

Motor

Eddy

current

induction

Reel

motors

MIC:

Specified;

Minimum;

LINE:

Specified;

—12

(195

mV)/50k

ohms

Minimum;

-—22

dB(61.5

mV)

LINE:

Specified;

—

(308

mV)/10k

ohms

Maximum;

—

2dB(615

mV)

HEADPHONE:

—60

(775

pV)/10k

ohms

—70

(245

uV)

MIC

(ATT

dB)

position

—19

(86.9

mV)

ohms,

one

channel

(MONITOR

Max.)

—

(388

mV)/4

ohms,

all

channels

SIMUL-SYNC

Out:

ips:

3180

+50

Tips:

3180

100

kHz

(push-pull

oscillator)

General

Export

UK/AUS

USA/CND

(53

Ibs)

net

100/117

220/240

—

(308

mV)/10k

ohms

Frequency

(Hz)

445

523

235mm

(17%"

204"

9%")

Consumption

WwW

125

543mm

(2!-3/8")

445mm(i7-

1/2")

CICIEICIs

00000000.

T-1267

Fig.

2-1

Dimensions

2-2

SERVICE

DATA

—MECHANIAL—

Tape

Speed

Deviation

and

Drift

Wow

and

Flutter

Pinch

Roller

Pressure

Reel

Torque

3000

+30

Hz,

within

Playback:

0.10%

(WRMS)

ips

0.12%

(WRMS)

ips

0.15%

(RMS)

ips

0.18%

(RMS)

ips

2.2

(4.8

Ibs)

Take-up:

LARGE

770

830

g-cm

(11

oz-inch)

SMALL

370

410

g-cm

(5.2

5.7

oz-inch)

Back

Tension:

LARGE

330

390

g-cm

(4.6

5.5

oz-inch)

Overall:

F.F./REW

Torque

Brake

Torque

F.F./REW

Time

2-3

SERVICE

Frequency

Response

Signal-to

Noise

Ratio

Erase

Efficiency

Stereo

Channel

Separation

SIMUL-SYNC

Chann

SIMUL-SYNC

Crosstalk

Total

Harmonic

Distortion

1400

1800

g-cm

(20

oz-inch)

SMALL

180

220

g-cm

(2.5

3.1

oz-9nch)

2000

g-cm

(28

0z-inch)

140

seconds

for

1800

tape

ATA

—ELECTRICAL—

Refer

Frequency

Response

Limits

charts

page

18,

and

22.

Overall:

ips

Playback:

both

speeds

SIMUL-SYNC:

both

speeds

kHz

signal

(Meadurement

with

input

higher

than

the

specified

Input

level)

Separation

Overall:

channel

kHz

signal

channel

kHz

signal

dB,

more.

1.0%

kHz

signal

NOTE:

Asa

result

containing

changes

and

improvements

during

the

production

run,

minor

differences

may

found

between

early

and

later

machines.

Value

“dB”

this

manual

refers

0.775

TOOLS

FOR

TESTING

AND

MAINTENANCE

minimum

the

following

tools

and

test

instruments

are

required

for

measuring

and

adjusting

obtain

optimum

performance.

Regular

maintenance

tools

will

adequate

not

available,

equivalent

can

used.

SPRING

SCALE:

FLUTTER

METER:

DIGITAL

COUNTER:

BANDPASS

FILTER:

VTVM

(AC):

OSCILLATOR:

ATTENUATOR:

OSCILLOSCOPE:

BLANK

TAPE:

0—4

(O0—8

Ibs)

0-300

(0-10

oz)

Meguro

Denpa

Sokki

K.K.,

Model

MK-668C

Range;

Hz—100

kHz

TEAC

MODEL

M-206A

kHz)

Hewlett-Packard

Co.,

Model

400E

Hz—100

kHz

General

purpose

General

purpose

TEAC

YTT-8013

for

those

not

listed

here.

any

test

instrument

listed

here

TEAC

TEST

TAPE:

TEAC

EMPTY

REEL:

TOOLS:

DEMAGNETIZER:

YTT-1004

(15

ips),

YTT-1003

(7%

ips)

for

Playback

Alignment

test.

YTT-2002

(7%

ips),

YTT-2004

(15

ips)

for

Tape

Speed

and

Wow

and

Flutter

test.

RE-702

(2.5”

dia.

hub)

RE-701

(4”

dia,

hub)

nut

driver,

Hex

Head

Allen

Wrench,

Plastic

alignment

tool,

Load

resistor

non

inductive

type

ohm/1

TEAC

E-3

equivalent.

PARTIAL

DIS-ASSEMBLY

4-1

OUTER

CASE

AND

PANEL

REMOVAL

Remove

panels

required

shown

the

illustration.

Unplug

the

power

cord

before

removing

any

panel

internal

part.

Fig.

4-1

Outer

Case

and

Panel

Removal

4-2

HEAD

ASSEMBLY

REMOVAL

Remove

the

screws

the

top

the

head

Cover

and

lift

off.

Remove

screws

holding

Head

P.C.B.

(A).

Remove

screws

holding

Head

Base

Plate

(B)

(with

head).

Remove

mounting

nuts

through

access

slot

head

base

plate

and

dis-connect

head

wire.

Refer

page

and

11.

—

4-3

TENSION

ARM

REMOVAL

—

RIGHT

TENSION

ARM

—

Remove

Spring

(E)

from

Switch-off

Drum

(D).

Remove

set

screw

holding

Switch-off

Drum

(D),

and

remove

(C)

and

(D).

Remove

NUT

holding

Right

Arm

Holder

(B),

and

lift

off

Right

Tension

Arm

(A).

—

LEFT

TENSION

ARM

—

Remove

screws

holding

plate

(L)

and

Lift

off

Friction

spring

(J)

and

spring

(K).

Remove

spring

(H)

from

Tension

Arm

Stopper

(I),

and

remove

Tension

Arm

Stopper

set

screw.

Remove

NUT

holding

Left

Arm

Holder

(G),

and

lift

off

Left

Tension

Arm

(F).

SHIELD

PLATE

(PAPER)

Pox

;

T-1269

4-4

REEL

MOTOR

REMOVAL

Remove

Power

from

Deck.

Remove

wooden

side

panels

removing

mounting

screws

each.

Loosen

set

screws

(Hex

head)

Reel

Turntable

ass’y

(D)

and

the

Brake

Drum

(A).

Lift

off

parts.

Disconnect

the

motor

wires

from

terminals

and

re-

lease

wire

harness

straps.

Remove

screws

securing

the

Brake

Ass’y

(B)

motor.

NOTE:

Take

care

not

bend

the

brake

band

brake

retainer

during

removal.

Remove

screws

securing

Reel

motor

(C)

chassis

through

the

front

panel.

NOTE:

When

replacing

the

LEFT

Reel

motor

Refer

Right

4-5

CAPSTAN

MOTOR,

FLYWHEEL

AND

illustration.

CAPSTAN

ASS’Y

REMOVAL

Unscrew

(by

hand)

the

capstan

dust

cap

(H).

Remove

screws

from

capstan

thrust

angle

(B)

and

re-

move

it.

Remove

flywheel

(C)

loosening

hex

head

set

screws

and

removing

drive

belt

(D).

Remove

Capstan

motor

(A)

with

(E)

removing

screws.

Disconnect

screws

Capstan

motor

from

P.C.B.

—

CAPSTAN

ASS‘'Y

REMOVAL

—

Remove

Arm

Support

Plate

(G)

and

capstan

ass’y

(F)

removing

screws.

NOTE:

When

replacing

parts

make

sure

belt

and

capstan

shaft

are

clean

and

free

oil.

TAPE

TRANSPORT

PARTS

LOCATION

—

REAR

VIEW

—

FREQUENCY

FUSE

P.C.B.

SELECTOR

(50/60)

for

PLAY

SMALL

POWER

for

TAKE-UP

TORQUE

Drop

out

(Fixed)

TRANSFORMER

for

BACK

TENSION

for

F.F.

(or

REW)

BACK

TENSION

—

(Fixed)

LEFT

REEL

MOTOR

RIGHT

REEL

‘

MOTOR

aa]

pNezzaer

MAGNET

STOP

SENSOR

P.C.B.

ASS'Y

POWER

VOLTAGE

SELECTOR

SUPPLY

PLUG

P.C.B.

SERVO

CAPSTAN

MOTOR

CAPSTAN

FLYWHEEL

LEFT

TENSION

ARM

ASS’Y

SYNC

P.C.B.

‘Fig.5-1

Tape

Transport

Parts

Location

HEAD

REPLACEMENT

AND

ALIGNMENT

—

MECHANICAL

—

6-1

HEAD

REPLACEMENT

replace

single

head

special

nut

driver

re-

quired.

Remove

the

nuts

(A)

the

defective

head

through

the

access

hole

provided.

This

releases

the

head

from

the

mounting

plate.

Note

the

position

the

wires

the

circuit

board.

Connect

the

new

head

the

same

man-

ner.

Replace

the

nuts

securing

the

new

head

the

plate.

Perform

head

alignment

before

operation.

PLAYBACK

HEAD

only

SHIELD

Fig.6-1

Head

Replacement

6-2

HEAD

ADJ.

SCREWS

AND

ALIGNMENT

o °

o>”

\©Ye©O0®

T-1286

Azimuth

adj.

screws

rf)

Height

and

Tilt

adj.

screws

Tangency

adj.

Nuts

Fig.

6-2

Head

Adjustment

Screws

and

Alignment

6-3

VISUAL

HEAD

ALIGNMENT

Since

the

head

alignment

critically

affects

the

frequency

response

both

playback

and

recording,

the

head

align-

ment

should

done

carefully.

The

head

can

adjusted

for

TILT,

TANGENCY,

HEIGHT

and

AZIMUTH.

For

head

alignment,

perform

the

following

coarse

adjust-

ments

first.

Then

fine

alignment

should

accomplished

electrically

while

playing

back

the

Test

Tape.

Coarse

Adjustment:

Without

Tape

Neer

eran

Height

and

Tilt

screws

This

alignment

performed

viewing

from

the

side

without

tape

threaded.

Check

that

the

head

surface

parallel

the

tape

guide

surface.

With

Tape

TANGENCY

.....

Head

mounting

nuts

Loosen

the

head

mounting

nuts.

Adjust

the

head

that

the

vertical

alignment

the

head

gap

perpendicular

the

surface

the

tape,

then

tighten

the

head

mounting

nuts.

HEIGHT

........

Height

and

Tilt

screws

This

alignment

checked

visually

looking

the

position

the

head.

The

head

core

for

track-1

(inner

core)

should

even

with

the

inner

edge

the

tape.

AZIMUTH

......

Azimuth

adj.

Screw

Adjust

the

azimuth

adj.

screw

that

the

gap

the

head

perpendicular

the

tape

travel.

NOTE:

After

this

coarse

adjustment

made,

the

adj.

screws

and

the

Head

mounting

nuts

should

realigned

according

the

electrical

head

alignment

paragraph

which

follows

this

Service

Manual.

6-4

MIS-ALIGNMENT

THE

HEADS

TILT

HEIGHT

(view

from

side

head)

(view

from

front

head)

i 4

Adjust

Screws

Adjust

Screws

AZIMUTH

{view

from

front

head)

Adjust

Nuts

Adjust

Screws

T-619

Fig.

6-3

Head

Mis-Alignment

—

Examples

—

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