Teac A-4000 Manuale utente

TEAC

A-4000

STEREO

TAPE

PLAYER

A-4010

STEREO

TAPE

RECORDER

SERVICE

MANUAL

TEAC

CORPORATION

Mla

The

serial

number

TEAC

Model

A-4000-Series

starting

#8354

hereby

announced

that

the

head

alignment

has

been

altered

the

following

Fig.

9-1

instead

Fig.

REVERSE

FORWARD

PLAYBACK

HEAD

PLAYBACK

HEAD

AZIMUTH

HEIGHT

AZIMUTH

HEIGHT

ERASE

HEAD

RECORD

HEAD

AZIMUTH

HEIGHT

PLAYBACK

RECORD

PLAYBACK

ERASE

HEAD

peyERSE

HEAD

FORWARD

HEAD

FIG,

9-1

HEAD

ALIGNMENTS

TABLE

CONTENTS

SPECIFICATIONS

COMPONENT

LOCATION

....

DISASOEMBLY

20%

gals

Selma

CONTROL

BUTTONS

.....

MECHANISM

ADJUSTMENTS

ALIGNMENT

AND

PERFORMANCE

CHECKS

MAINTENANCE

2...

TROUBLE

SHOOTING

.....

TRANSPORT

MECHANISM

WIRING

DIAGRAM

AMPLIFIER

SCHEMATIC

DIAGRAM

RECORDING

AMPLIFIER

SCHEMATIC

DIAGRAM

EXPLODED

VIEW

AND

PART

NO.

Page

SPECIFICATIONS

Heads

Four,

track

channel

Erase,

Record,

Forward

playback

and

Reverse

playback

Reel

Size

maximum

Tape

Speed

¥2

and

33/4

ips

(40.5%)

Motors

1-Dual

speed

hysteresis

motor

for

capstan

drive

2-Torque

motors

for

reel

turntables

Wow

and

Flutter

71/2

ips

0.12%

33/,

ips

0.15%

Fast

Winding

Time

Approximately

seconds

for

1,200

feet

Frequency

Response

7/2

ips

20,000

cps

(43

15,000

cps)

33/4

ips

12,000

cps

(43

7,500

cps)

Equalization

microseconds

(NAB)

for

71/2

ips

120

microseconds(EIA)

for

33/4

ips

Signal

Noise

Ratio

71/2

ips

(peak

record

level

unweighed

Crosstalk

channel

1,000

cps

between

adjacent

tracks

100

cps

Input

(RA-40)

Microphone:

10,000

ohms,

0.25mV

minimum

Line:

100,000

ohms,

0.14V

minimum

Output

volts

for

load

impedance

100,000

ohms

Power

Requirements

100/117/200

VAC,

cps

A-4000,

A-4OLOL:

100

A-4010

110

Dimensions

A-4000

17Y4"

13"

Yate

A-40L0L:

Yyu

You

Yan

RA-4O

YA"

59/16"

Yan

A-4010

174/4r

17Yan

gl/an

ight

A-4000

Lbs

A-4O0LOL:

Lbs

RA-4O

Lbs

A-4010

Lbs

Due

COMPONENT

LOCATION

A-4000

PLAYER

(DECK)

FIG.

A-4000

DECK

OOO

GOGO

©®©

Reel

Holder

Left

Reel

Turntable

Shaft

Left

Reel

Turntable

Tension

Arm

Sensing

Post

permits

automatic

switch-over

reverse

playback

upon

contact

with

the

sensing

foil

the

tape.

Control

Buttons

select

tape

operation.

Press

for

forward

playback.

Press

for

reverse

playback.

Press

and

[FAST

for

fast

forward,

Press

and

for

rewind.

Head

Assembly

Tape

Lifter

lifts

tape

from

heads

during

fast

wind

operation,

Capstan

drives

tape

recording

and

play-

back

mode.

Pressure

Roller

(Pinch

Roller)

drives

tape

with

capstan.

Power

Pilot

Lamp

turns

when

equipment

energized.

Power

Switch

turns

recorder

off.

Tape

Speed

Selector

Switch

selects

tape

speed

and

appropriate

equalizer

circuit.

position:

71/2

ips

(19

cm/s)

position:

33/4

ips

(9.5em/s)

Automatic

Shut-off

Lever

shuts

off

power

transport

when

tape

runs

out.

Right

Reel

Turntable

Shaft

@O©@

®@OOQ®

Right

Reel

Turntable

Index

Counter

indicates

tape

position,

resets

when

button

pressed.

TAPE

TENSION

Tape

Tension

Selector

Switch

provides

weaker

tape

tension

when

1/2

mil

thinner

tape

used.

Playback

Preamplifier

Output

Jacks

(OUTPUT)

EQUALIZER

AMP!

Socket

for

connection

the

equalizer

the

record

amplifier.

Remote

Control

Socket

[TO

REC.

AMP.!

Socket

for

connection

the

racerd

amplifier,

Fuse

Replace

only

with

ampere

fuse,

POWER

IN}

Power

Cord

Receptacle

[c/s

SELECT!

Power

Supply

Frequency

Selector

Switch

VOLTAGE

SELECT;

Power

Supply

Voltage

Selector

Switch

RA-40

RECORD

AMPLIFIER

©®@

FIG.

MIC

IN|

Mic

Input

Jacks

Mic

Level

Control

Line

Level

Control

NOTE:

Level

controls

shown

62)

63)

and

69)

above

are

dual

potentiometers.

Inner

knob

(Channel

friction

coupled

with

outer

knob

(Channel

operated

together

separately.

Level

Indicator

Meter

for

Channel

Level

Indicator

Meter

for

Channel

CRGRORCEC)

©)

@@POe®

Record

Pilot

Lamp

for

Channel

Record

Pilot

Lamp

for

Channel

RECORD

SELECT!

Record

Selector

Buttons

PLAYBACK]

Playback

Level

Control

MONITOR]

Monitor

Selector

Switch

SOURCE:

position:

[TAPE]

position:

Head

Phone

Jack

DECK

OUTPUT

Playback

Input

Jack

DECK

EQUALIZER

Record

Equalizer

Socket

[REC/PLA¥|

Record

Input

and

Playback

Output

Jack

LINE!

Line

Input

Jack

OUTPUT]

Output

Jack

DECK;

Socket

FUSE

AMP.;

Fuse

The

input

signal

recorded

can

reproduced

through

head-

phones

speaker

system

while

the

meter

indicates

the

level.

During

playback

while

record-

ing,

recorded

signal

the

tape

can

reproduced

above.

for

connection

the

preampli-

fier

output

the

A-4000

deck.

for

connection

tape

speed

selector

switch,

for

DIN

(Deutsche

Normen)

connection.

Replace

only

with

ampere

fuse.

DISASSEMBLY

REMOUNTING

UNIT

FROM

CASE

(Refer

Figs.

5.)

Remove

power

cord,

remote

shorting

plug

and

audio

cables,

Remove

two

screws

(3)

Lay

the

recorder

face

down

soft

mat.

Remove

the

back

panel

<6)

from

the

rear

the

case

removing

eight

screws

(5)

and

disconnect

the

REC

AMP

cable

and

equal-

izer

cable.

Remove

the

case

Q@)

from

the

transport

removing

four

screws

Qo.

Turn

the

recorder

and

lay

the

recorder

face

soft

mat.

Remove

the

following

parts

and

hardware

(see

Fig.

3).

Pinch

roller

Dust

cap

(2)

Reel

tables

(7)

(left

and

right)

removing

three

(each)

screws

(6)

Head

housing

(5)

removing

screw

(4)

Four

mounting

screws

Face

plate

(9)

REMOVING

AMPLIFIER

FROM

CASE

(Refer

Fig.

Remove

the

cable

TRANSPORT

and

EQUALIZER

connectors.

Remove

four

screws

(4).

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