Teac A-6010GSL Manuale utente

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1

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TEAC

22232

STEREO

TAPE

DECK

®

SERVICE

MANUAL

TEAC

CORPORATION

U.S.

DISTRIBUTOR:

TEAC

corpora

ron

oF

AMERICA

7733

TELEGRAPH

ROAD

SALES

OFFICE:

SHINQURU

BUILDING

MONTEBELLO,

CALIFORNIA

90640

1-8-1,

NISHI-SHINJUKU,

SHINJUKU,

TOKYO

U.S.A.

TEAC

HONGKONG

LIMITED

ROOM

NO.

1105

EUROPEAN

DISTRIBUTOR:

TEAC

EUROPE

B.V.

MAIN

OFFICE:

MELBOURNE

PLAZA,

33

QUEEN'S

ROAD

C.

KABELWEG

45-47,

AMSTERDAM-W.

2,

HONG KONG

HOLLAND

MT6012E100

:

er

pfuivruin'{Waakan

pe7uz

oes

To

make

a

handy

labling

tab

from

a

portion

of

the

back

cover:

1.

Ba

Cut

along

the

dotted

Jines

and

fold

back.

Re-assemble

the

binder

and

close

it

with

the

tab

sticking

out.

.

Bend

the

tab

over

the

front

cover.

Cut

off

the

above

label

and

stick

it

on

the

tab.

:

1.

GENERAL

DESCRIPTION

The

TEAC

A-6010GSL

is

a

three

motors,

solenoid

operated,

four

high

density

ferrite

heads

provided

(forward;

erase,

record,

playback

and

reverse

playback).

Dual

system

automatic

reverse,

phase

sensing

sig-

nal

or

foil

operated.

The

AR-70GSL

preamplifier

circuits

use

IC

and

silicon

transistors.

Independent

circuits

are

provided

for

recording,

monitoring,

VU

meter

amplifier

and

playback

functions.

Electrical

assembly

provides

two

level

bias

selector

for

conventioanl

and

low

noise/high

out

tapes,

dual

scale

VU

meter,

meter

level

switch

for

optimum

recording

accuracy

with

any

type

recording

tape.

Full

MIC/LINE

mixing

capability

with

individ-

ual

level

controls.

This

service

manual

provides

adjustment

and

alignment

procedures,

sche-

matic

diagram,

parts

replacement

information

and

the

proper

procedures

for

obtaining

necessary

repair

parts.

If

adjustments

or

repair

procedures

are

not

clear

or

seem

difficult

to

accomplish

or

should

you

desire

more

detailed

technical

information,

please

contact

your

nearest

TEAC

dealer,

TEAC

Corporation

or

affiliated

corporations,

addresses

of

which

are

printed

in

this

manual.

—

INDEX

1.

GENERAL

DESCRIPTION

2.

SERVICE

DATA

3.

EQUIPMENT

REQUIRED

4.

PARTIAL

DISASSEMBLY

5.

HEAD

MECHANICAL

ALIGNMENT

6.

MEASUREMENT

AND

ADJUSTMENT

-MECHANICAL~

7.

MEASUREMENT

AND

ADJUSTMENT

-ELECTRICAL-

8.

PREVENTIVE

MAINTENANCE

9,

TROUBLE

SHOOTING

CHART

10.

SCHEMATIC

DIAGRAM

11.

PRINTED

CIRCUIT

BOARD

AND

PARTS

LIST

12.

EXPLODED

VIEW

AND

PARTS

LIST

13.

WARRANTY

AND

PACKING

FOR

SHIPMENT

14.

MANUAL

CHANGE

2.

SERVICE

DATA

MECHANICAL

FERRITE

HEADS:

DIODES:

REEL

SIZE:

TAPE

WIDTH:

TAPE

SPEED:

MOTORS

:

FAST

WINDING

TIME:

wow

AND

FLUTTER:

OPERATING

POSITION:

POWER

REQUIREMENT:

WEIGHT

=

Four

separate

heads

assembled

in

plug

in

unit.

Four

track;

Erase

1.8k2/100kHz,

Erase

current

approx.

30mA

Four

track;

Record

802/1kHz,

Bias

current

approx.

3mA(signal

200uF)

Four

track;

Playback

(Forward/Reverse)

1.6k2/1kHz

~64dB/400Hz

SIBO1-02

x2

SIBO1-06

x6

7"

maximum

NAB

reel

Standard

1/4inch

tape

7-1/2ips

and

3-3/4ips

(0.5%)

One-

4/8

pole

dual

speed

hysteresis

synchronous

motor

for

capstan

drive.

Two-

Six

pole

eddy

current

motors

for

reel

drive.

Approx.

90

seconds

for

1200 feet

7"

NAB

reel

0.06%

at

7-1/2ips

0.09%

at

3-3/4ips

Wow and

flutter

measured

according

to

weighted

NAB

standard

using

TEAC

flutter

free

tape.

Horizontal

or

vertical.

100/117/200/220/240V

AC

50/60Hz

150W

2Qlkg

(52

1bs)

SERVICE

DATA

(conriaueD)

ELECTRICAL

TRANSISTORS:

Tc:

DIODES:

FREQUENCY

RESPONSE:

EQUALIZATION:

INPUT:

OUTPUT:

BIAS

FREQUENCY:

SIGNAL

TO

NOISE

RATIO:

CROSS

TALK

REJECTION:

ERASE

EFFICIENCY:

2SC1000BL

x2

28C971

x2

28C536F

x2

28D235

x1

2S8C693F

x2

2SA494Y

(2SA666IS)

x2

2SA572YL4

(2SA666IS)

x2

28C733X

(2S8C828R)

(2S8C536F)

x7

TEAC

42709

(LD-3120)

x4

TEAC

42710

(LD-3141)

x2

SIBO1-02

x5

Zener,

02Z

6.2A

x1

Overall

from

recording

INPUT

to

playback

LINE

OUT.

Refer

to

frequency

response

limits.

NAB

equalization

7-1/2ips

50usec.

3-3/4ips

90usec.

MIC:

6002,

0.25mV

LINE:

50,0002

or

more,

0.1V

LINE:

0.3V

for

load

impedance

of

10,0002

or

more.

PHONES:

82

100kHz

push-pull

oscillator

464B

or

more

at

3-3/4ips

484B

or

more

at

7-1/2ips

unweighted

noise

Channel

to

channel

at

1lkHz/45dB

Adjacent

track

at

100Hz/40dB

or

more.

65dB

or

more

at

7-1/2ips

These

specifications

are

indispensible

information

and

are

required

to

service

the

equipment

properly.

They

may

differ

slightly

from

those

printed

in

the

advertising

brochures

or

the

operation

manual.

3.

EQUPMENT

REQUIRED

For

proper

adjustment

and

measurement,

it

is

recommended

that

the

following

test

equipment

be

available;

FOR

MECHANICAL

MEASUREMENT

SPRING

SCALE:

TEST

TAPE:

FLUITER

METER:

DIGITAL

FREQ.

COUNTER:

004

kilo-grams

(0v8

1bs)

#5086025000

0.300 grams

(0°10

oz)

#5086026000

TEAC

YIT-2003

for

7-1/2ips

TEAC

YTT-2002

for

3-3/4ips

Meguro

Model

MK665B

(preferred)

or

Sentinel

FL-3D-1

Capable

of

0

to

5kHz

indication

TOOLS:

Generali,

2mm

nut

driver

#5086014000

Hex

head,

Allen

wrench

#5086021000

FOR

ELECTRICAL

MEASUREMENT

Fig.

3-1

Allen

Wrench

TEST

TAPE:

TEAC

YIT-1003

for

7-1/2ips

TEAC

YIT-1002

for

3-3/4ips

SCOTCH

203 and

150

for

recording

tests

EMPTY

REEL

TEAC

RE-702

(2"

huby

TEAC

RE-701

(4"

hub)

TEST

SET:

TEAC

M-826A

test

set

BAND

PASS

FILTER:

TEAC

M-206A

(1kHz)

AC/DC

VIVM:

General

purpose

RESISTOR:

Non

inductive

type

8/1W

OSCILLOSCOPE:

General

purpose

NOTE:

Use

of

the

TEAC

M-826A

test

set

is

recommended.

This

set

incorporates

a

LEVEL

METER,

Audio

Oscillator,

Channel

Selecting

Switch,

Variable

Attenuator,

Monitor

Speaker

§

and

Cables.

TEAC

M-826A

measures

the

RMS

value

of

the

Voltage

(OdB=0.775V)..

Characteristics

of

this

test

set

are

similar

to

the

standard

7

VU-meter.

Fig.

3-1

TEAC

Test

Set

M~826A

4.

PARTIAL

DISASSEMBLY

TAPE

TRANSPORT

REMOVAL

AMPLIFIER

Remove

power

cord

and

other

connecting

cords.

Lay

the

equipment

face

down

on

a

soft

mat.

Remove

the

two

rear

cover

screws

on

the

top

of

rear

cover.

Remove

three

upper

screws

on

both

sides

of

the

case.

Gently

lift

the

case

from

the

tape

transport.

REMOVAL

Remove

two

screws

on

both

sides

of

the

case.

Slide

the

amplifier

from

case.

Fig.

4-1

Case

Removal

LEFT

TENSION

ARM

REPLACEMENT

-

Unsolder

two

wires

from

terminal

strip.

-

Disconnect

one

end

of

the

spring.

-

Loosen

allen

screw

and

spring

retaining

pin

then

lift

out

tension

arm.

IMPORTANT:

A

special

grease

(MULTI

DIA

$S8-10)

must

be

applied

during

installa-

tion

between

the

tension

arm

shaft

and

the

bushing

to

maintain

proper

tension

arm

damping.

-

To

install,

reverse

the

previous

procedures.

RIGHT

TENSION

ARM

REPLACEMENT

-

Disconnect

one

end

of

the

spring.

-

Loosen

allen

screw

retaining

the

tension

arm

shaft,

and

gently

lift

out

the

ten-

sion

arm.

-

Apply

"MORICOTE"

(graphite-molybdenum

based)

to

tension

arm

shaft

and

bushing

during

installation.

~

After

installation,

check

tension

arm

operation,

It

should

operate

freely

and

the

thrust

clearance

should

be

minimum

(secure

but

not

binding).

REEL

MOTOR

REPLACEMENT

-

Using

hex

head

wrench,

loosen

the

two

screws

on

the

counter

belt

pulley.

Remove

pulley

(right

turntable

only).

-

Remove

the

rubber

insert,

then

remove

the

three

screws

holding

reel

table

to

motor,

Lift

out

the

reel

table,

shim

and

spacer.

-

Remove

the

three

screws

holding

the

reel

motor

to

the

mount.

-

Unsolder

four

wires

connecting

the

reel

motor

and

remove

motor

from

panel.

~

Cut

the

four

wires

connecting

the

reel

motor

approx.

1"

above

the

terminal.

~

Remove

the

four

screws

mounting

the

motor.

-

To

reinstall

reel

motor,

reverse

above

pro-

cedures.

Use

the

wire

remaining

on

the

terminal

for

a

guide

in

re-wiring

the

new

motor.

L—-Fig.

4-2

Left

Tension

Arm——

&F

eS

o>

Lange:

4-3

Right

Tension

Arm

—

CAUTION:

While

replacing,

be

careful

not

vend

the

brake

bands.

Do

not

get

ofl

on

the

brake

drum.

Fig.

4-4

Reel

Motor

————

CAPSTAN

ASSEMBLY

REPLACEMENT

-

Remove

capstan

dust

cap

on

the

front

panel.

-

Remove

two

screws

mounting

the

thrust

plate

and

pull

away

from

the

chassis.

-

Remove

capstan

belt.

-

Loosen

two

allen

screws

in

the

capstan

fly-

wheel

and

remove

the

flywheel.

-

Remove

three

screws

mounting

the

capstan

assembly

and

lift

the

assy

upward.

~

Reverse

the

above

procedures

when

install-

ing

the

capstan

assembly.

-

During

installation,

apply

a

thin

applica-

tion

of

grease

to

the

panel

inside

the

thrust

plate.

CAUTION:

A

clearance

of

approx.

0.5mm

must

be

maintained

between

the

flywheel

and

cap-

stan

assembly.

CAPSTAN

MOTOR

REPLACEMENT

-

Remove

the

fan

by

loosening

two

hex

screws.

~

Remove

the

capstan

belt,

PC

board

and

cap-

stan

pulley

by

loosen

two

hex

set

screws.

~

Cut

the

six

wires

connecting

the

motor

on

the

PC

board.

~

Remove

the

three

slotted

screws

(studs

bolt).

~

Gently

fold

capstan

motor

assy

and

remove

the

four

screws

holding

the

motor

on

the

pulley

side.

Then

remove

the

four

motors

holding

screws

on

the

fan

side.

-

To

reassemble,

reverse

the

procedures.

NOTE:

After

motor

replacement,

check

posi-

tion

of

capstan

pulley

on

shaft

for

proper

alignment

with

belt

guide.

Check

to

make

sure

the

pinch

roller

installing.

If is

loose,

open

the

slot

slightly.

HEAD

REPLACEMENT

NOTE:

Heads

can

be

replaced

individually

or

as

a

complete

assembly.

Azimuth

adjustment

(electronic)

is

not

to

be

performed

until

all

mechanical

alignments

have

been

performed.

After

replacing

the

heads,

proceed

to

the

next

page

for

mechanical

alignment.

CAUTION:

All

power

must

be

removed

from

the

unit

when

replacing

heads

to

prevent

transient

pulses

from

passing

through

the

heads.

These

may

cause

strong

magnetization

of

the

head

material

or

damage

the

delicate

winding.

HEAD

ASSEMBLY

REPLACEMENT

~

Remove

the

head

housing

cover

by

loosening

two

hex

screws

on

top

of

cover.

~

Remove

the

four

mounting

screws

indicated

by

the

arrows

in

the.

diagram.

~

Slide

the

assy

out

from

the

plug.

-

Fit

the

original

shielding

plate

onto

the

new

head

assy.

-

Slide

the

new

assembly

onto

the

unit

and

se-

cure

the

four

screws.

-

Proceed

to

the

next

page

for

mechanical

align-

ment

procedures.

INDIVIDUAL

HEAD

REPLACEMENT

NOTE:

All

of

the

heads

are

individually

mounted

on

the

top

base

plates

of

head

assembly

for

easy

accessibility

and

servicing.

-

Remove

head

housing

cover

to

expose

head

assy.

~

To

replace

a

single

head,

a

special

2mm

nut

driver

is

required.

~-

Remove

the

two

nuts

on

the

defective

head

through

the,

access

hole

provided

to

release

the

head from

the

mounting

plate.

-

Note

the

position

of

the

head's

wires

on

the

circuit

board

and

unsolder

the

defective

head.

-

Using

figure

for

reference,

connect

the

new

head

to

the

circuit

board.

-

Head

installation

mounting

provides

for

either

left

or

right

positioning.

-

Determine

the

proper

position

by

adjusting

the

nuts

to

obtain

a

90°

angle

between

the

tape

and the

head.

~

Proceed

to

the

next

page

for

mechanical

align—

ment

procedures.

'-Fig.

4-8

Individual

Head—