Teac MV-3010 Bedienungsanleitung

E

T.e

ы

pct

"y

orte

Pr

PIE

СКА.

Чет

TAS

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ж.

ÔNG

UN

Ү

`

V3oS%œ

|

1

Ж

SIMAK

TO

»,

TEAC

77

MV-3010

~=

-

_

Service

Manual

MU

3010

CONTENTS

INTRODUCTION

AND

IMPORTANT

SAFETY

PRECAUTION.....................................

i

ELEOTHICALADUUSTMENT..........---.-........-.....

EA-1

1.

PLAYBACK

SWITCHING

POINT

ADJUSTMENT

een

EA-1

MECHANICAL

ADJUSTMENT

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

MA-1

DECK

ADJUSTMENT

POINTS

ен

citer

tore

пони

dates

MA-1

1.

MECHANISM

CONTROL

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

diiit

Qa

ke

nt

аниа

идэн

MA-2

2.

ADJUSTMENT

OF

BT

TORQUE

IN

PLAY

MODE

een

MA-3

9;

AUDIOICTL

BEAD:

sisan

enn

A

ааа

a

sb

lina

oU

RR

рыны

Н

MA-4

4.

TAPE

TRANSPORT

SYSTEM

CHECKS

AND

ADJUSTMENT

линеен

MA-4

5.

INTERCHANGEABILITY

ADJUSTMENT

eee

MA-6

6.

FRONT

LOADING

ASSEMBLY

ATTACHMENT

ttt

MA-10

7.

RG

POST

HEIGHT

ADJUSTMENT................

a

eed

iibi

ides

MA-11

PERIODIC

МАНТЕНАМСЕ........

niono

den

pobe

Ia

ansa

ak

Vaska

MA-12

EXPLODED

VIEW

OF

THE

CASSETTE

DECK

MECHANISM

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

enn

MA-14

MECHANICAL

PARTS

LIST

=

ssp

reat

ананы

арады

санан

онай

leko

une

MP-1

DIAGBAM

ана

as

омар

lena

o

dolar

e

ань

1

1:

BLOCK

DIAGRAM

D

——~~T„=———-—-E

ETE

M

1

2.

TERMINOLOGY

REFERENGES.

spiso

to

nalsnno

ының

ud

ya

a

omara

afa

2

3.

SCHEMATIC

DIAGRAM)

нанына

Sa

E

make

4

4.

1C,

TRANSISTOR

LEAD

IDENTIFICATION

encens

6

5.

"ELECTRICAL

PARTS

LOCATION

ix

an

and

Skol

и

ene

8

6.

REMOVAL

OF

THE

DECK

MECHANISM

eee

11

7;

BRIEF

SERVICE

INSTRUCTION

u

азанны

ое

не

12

8.

CABINET

EXPLODED

VIEW

аннан

KE

er

UU

iU

tima

ын

erii

tnt

13

8:

ELECTRICAL

PARTS

LIST:

muki

анални

cdd

eja

kaa

at

ta

ai

e

a

PL-1

INTRODUCTION

This

manual

provides

service

information

for

our

VHS

Video

Cassette

Recorder.

It

describes

the

principles

and

adjustments

of

mechanical

and

electrical

operation

for

this

model.

Service

procedures

given

herein

cover

only

field

maintenance

services.

Adjustments

which

require

high-level

instruments,

jigs,

and

techniques

are

excluded

since

they

should

be

performed

at

the

factory.

Due

to

design

modifications,

the

servicing

procedures

and

data

given

in

this

manual

are

subject

to

possible

change

without

prior

notice.

IMPORTANT

SAFETY

PRECAUTION

Prior

to

shipment

from

the

factory,

our

products

are

strictly

inspected

to

conform

with

the

recognized

product

safety

and

electrical

codes

of

the

countries

in

which

they

are

to

be

sold.

However,

in

order

to

maintain

such

compliance,

it

is

equally

important

to

implement

the

following

precautions

when

a

set

is

being

serviced.

PRECAUTIONS

DURING

SERVICING

1.

Parts

identified

by

the

A

symbol

are

critical

for

safety.

Replace

only

with

parts

number

specified.

2.

In

addition

to

safety,

other

parts

and

assemblies

are

specified

for

conformance

with

such

regulations

as

those

applying

to

spurious

radiation.

These

must

also

be

replaced

only

with

specified

replacements.

Examples:

RF

converters,

RF

cables,

noise

blocking

capacitors,

noise

blocking

filters,

etc.

3.

Use

specified

internal

wiring.

Note

especially:

€

Wires

covered

with

PVC

tubing

€

Double

insulated

wires

€

High

voltage

leads

4.

Use

specified

insulating

materials

for

hazardous

live

parts.

Note

especially:

@

Insulation

tape

@

PVC

tubing

@

Spacers

@

insulation

sheets

for

transistors

5.

When

replacing

AC

primary

side

components

(transformers,

power

cords,

etc.),

wrap

ends

of

wires

securely

on

the

terminals

before

soldering.

6.

Observe

that

wires

do

not

contact

heat

producing

parts

(heatsinks,

oxide

metal

film

resistors,

fusible

resis-

tors,

etc.).

7.

Check

that

replaced

wires

do

not

contact

sharp

edged

or

pointed

parts.

8.

When

a

power

cord

has

been

replaced,

check

that

force

(maximum

applied

force

should

be

20-30

Ibs.)

in

any

direction

will

not

loosen

it.

9.

Also

check

areas

surrounding

repaired

locations.

10.

Use

care

that

foreign

objects

(screws,

solder

droplets,

etc.)

do

not

remain

inside

of

unit.

SAFETY

CHECK

AFTER

SERVICING

1.

Insulation

resistance

test

Confirm

specified

insulation

resistance

or

greater

between

power

cord

plug

prongs

and

externally

exposed

parts

of

the

set

(RF

terminals,

video

and

Output

terminals,

etc.).

2.

Dielectric

strength

test

Confirm

specified

dielectric

strength

or

greater

between

power

cord

plug

prongs

and

exposed

accessible

parts

of

the

set

(RF

terminals,

antenna

terminals,

video

and

audio

output

terminals,

etc.).

3.

Clearance

distance

When

replacing

primary

circuit

components,

confirm

specified

clearance

distance.

ELECTRICAL

ADJUSTMENT

1.

PLAYBACK

SWITCHING

POINT

ADJUSTMENT

Mode

:

PLAY

Test

Signal

:

TPS-13(S)

or

135

Check

Point

:

“КІР

Adjustment

Point

:

CH

UP/DOWN

(A/Y)

KEY

Adjustment

:

(1)

Solder

a

30cm

long

piece

of

lead

to

the

PG-TP

at

the

back

of

the

Main

PCB

(Figure

1

below)

and

wind

it

round

the

back.

(Take

care

not

to

short

circuit

nearby

components.)

(2)

Playback

the

test

tape

and

allow

the

automatic

ATR

to

finish.

(3)

Connect

the

lead

attached

in

step

(1)

to

the

Tuner

(ETAO1)

earth

line.

(Make

sure

that

the

lead

can

not

come

loose.)

(4)

Adjust

the

display

for

FIP

(H701)

with

the

CH

UP/DOWN

(Д/У)

keys

until

itis

as

shown

in

Figure

2

Display

B

below.

ELECTRICAL

ADJUSTMENT

(5)

Remove

the

lead.

Display

A

Press

the

DOWN

V

key.

E—»——»

A

P

Display

B

dm

DN,

ашыу

а

uL

MM

CR

S

P

Display

C

Press

the

UP

A

key.

шэг...

|

Р

=

:

Flashing

Figure

2

Figure

1

MECHANICAL

ADJUSTMENT

DECK

ADJUSTMENT

POINTS

@

FM

Waveform

(Envelope)

entrance

adjustment

screw

Q

FM

Waveform

(Envelope)

exit

adjustment

screw

Q

Audio

Azimuth

adjustment

screw

@

Control

Head

phase

(X-value)

adjustment

point

@

Audio/CTL

Head

height

adjustment

screw

©

АС

Head

tilt

adjustment

screw

@

RG

Post

height

adjustment

screw

=

c

ш

=

Е-

9

2

=)

а

<

-

<

o

z

<

=

O

LU

=

1.

MECHANISM

CONTROL

The

mechanism

includes

its

own

mode

as

well

as

the

operation

mode

of

the

VCR

as

shown

in

the

chart

below.

This

mode

serves

an

important

function

in

working

to

protect

the

tape

by

passing

through

the

VCR

when

the

mode

is

switched

over.

The

movement

of

the

mechanism

mode

is

performed

by

the

control

signal

of

the

loading

motor's

rotary

control

circuit.

With

this

control,

the

operation

mode

position

is

detected

by

the

Mode

switch

(4-bit

mode

data

output),

Cassetle

In

switch,

tape

top

sensor

and

the

tape

end

semsor

which

detects

all

modes

of

the

mechanism.

1-1.

MODE

SW

The

composition

of

the

4

terminals,

COM

DATA

1,

2, 3, 4,

are

treated

as

a

4

bit

signal.

POSITION

NO

А

m

~

-ма

POSITION

NAME

š

W

AE...

|

0

c

+

EN

эмтон

|

jm

мы

ыш

TIMINO

|

999M

i

L3

i

и

mm

ни

ЮМ.

H-OFE

|

SW

=

=...

а

=

ш

NEM

ЗА

ЕА

|

/

Á—

—

цэн:

ТІ

шилтгээн

лэ

су

SEE

UI

EDU

элс

гс

POSITION

|

COM-M!

0

41

!

0

!

1:

0.

0

H

1

037

Jj

e

I

odes

121

и

ее

dr

1

4

1.

0:

1

10.41

CODE

COM-M2

02-4

50.

395.3

To

eee

eA

eee

Pee

ee

eee

1=OFF

COM-M3

4341-459

ЕЕ

Ж

ИЕ

ИШЕ

ТИГИ

ИШ

ИБ

ЕГ

4:11:50:

осо

о-ом

ЕНЕ

10

13

1.1

0:150

03

T

r0

17

115

01

i

1.5

TE

Dada

Le

1035

15

1.

MODE

SW

CM

м

M2

мз ма

Equivalent

1

Ї

сом\о

MING

мо

мз

ом.

жылыу

бду

чүле;

1-2.

CONFIGURATION

OF

THE

1-2-4.

Motor

TN6500

VCR

MECHANISM

(A)

Capstan

Motor

:

The

dri

i

1-2-1.

Cassette

Drive

Mechanism

e

drives

the

capstan

axle

directly

and

also

drives

the

reel

that

has

been

loaded

on

the

belt.

This

motor

is

also

used

to

drive

the

cassette

loading

mechanism.

|

.

)

(В)

Tape

Loading

Motor

(A)

Detection

of

cassette

insertion

In

addition

to

cassette

loading/unloading,

this

motor

also

When

an

cassette

is

inserted,

the

capstan

motor

starts

and

Switched

between

the

various

operating

modes(PLAY,

FF/

simultaneously

causes

the

shutter

on

the

main

unit

to

break

the

light

REW

etc.

)

beam

ofthe

Tape

Top

Sensor.

This

capstan

FG

pulse

andthe

Tape

|

(С)

Cylinder

Motor

Top

Sensor

change

cause

the

cassette

to

be

pulled

into

the

VCR.

Connected

to

the

rotating

head

drum

and

drives

the

rotating

The

cassette

is

loaded

and

ejected

via

the

drive

from

the

capstan

motor.

(B)

Detection

of

completed

cassette

insertion

operation

head.

This

is

detected

by

the

Cassette

Insertion

Switch

that

is

linked

to

the

actuator

activated

when

a

cassette

is

inserted.

1-2-5.

Safety

Tab

Sensor/Actuator

Note:

The

Cassette

Insertion

Switch

is

not

included

This

actuator

detects

the tab

that

operates

the

REC

SAFETY

with

the

deck

mechanism.

Switch.

(C)

Detection

of

completed

cassette

ejection

operation

Note:

This

mechanism

does

not

include

the

switch.

As

above,

this

is

detected

by

the

shutter

on

the

shutter

г

detecting

the

change

іп

the

Tape

Top

Sensor.

The

light

1-2-6.

Mode

Sensor

Switch

beam

that

is

broken

by

cassette

insertion/ejection

is

restored

This

detects

the

4-bit

code

before

each

position

and

is

connected

when

the

cassette

has

been

ejected.

to

the

tape

loading

mechanism.

1-2-2.

Tape

Loading

Mechanism

1-2-7.

Take-up/Supply

Reel

Sensor

Tape

loading

mechanism

is

the

mechanism

that

is

loaded

Photoelectric

Cell

with

the

tape

loading

motor

linked

to

the

mode

switch.

The

A

luminous

diode

and

phototransister

at

the

fixed

position

for

the

cell

following

actions

occur

when

the

4-bit

position

code

output

comprise

the

reel

sensor.

(Pulse

rate-8pulses/rotation)

from

the

mode

detection

switch

is

used.

(A)

The

tape

is

pulled

out

of

the

cassette

and

wound

on

the

.

cylinder.

(tape

loading)

N

(B)

The

tape

is

returned

to

the

cassette.

(tape

unloading)

1-2-8.

Tape

Start/End

Sensor

Photoelectric

Cell

(C)

Function

are

switched

so

that

each

mechanism

can

operate.

A

luminous

diode

and

phototransister

at

the

fixed

position

for

the

cell

1-2-3.

Tape

Transporta

tion

Mechanism

comprise

the

start/end

sensor.

(Pulse

rate-8pulses/rotation)

|

Note:

This

mechanism

does

not

include

the

luminous

diode

The

tape

is

fed

through

the

VCR

by

the

action

of

the

capstan,

or

the

phototransister.

pinch

roller

and

reel

drive.

MA-2

2.

ADJUSTMENT

OF

BT

TORQUE

IN

PLAY

MODE

(ADJUSTMENT

OF

THE

TENSION

ARM

POSITON)

1.

Remove

the

FL

Ass'y.

2.

Rotate

the

loading

pulley

with

your

finger

until

PLAY

mode

is

reached.

3.

Insert

a

standard

screwdriver

into

the

BT

adjustment

groove

(a

or

b)

of

the

main

chassis.

Twist

the

screwdriver

left

and

right

to

adjust

gap(A)

and

gap(B)

so

that

they

are

the

same.

Loading

Block

Rail

Groove

Tension

Arm

BT

Band

Ass'y

Reel

Ass'y

H.

©

=

BT

adj.

=

a

=

|-

0)

2

=

а

«

-

<

°

o

2

ч

I

О

Lu

°

То

reduce

the

gap

(BT

torque

reduction),

insert

into

e

To

increase

the

gap

(BT

torque

increase),

insert

into

=

adjustment

groove

“a”

and

twist

counter-clockwise

as

adjustment

groove

“b”

and

twist

clockwise

as

shown

in

the

figure

below.

in

the

figure

below.

CAUTION:

Do

not

twist

at

too

much

of

an

angle.

Doing

so

will

have

adverse

effects

on

other

areas

as

well.

MA-3

3.

AUDIO/CTL

HEAD

4.

TAPE

TRANSPORT

SYSTEM

3-1.

TAPE

TRANSPORT

ADJUSTMENT

CHECKS

AND

ADJUSTMENT

Audio

Head

The

tape

transport

system

has

been

precisely

aligned

at

the

factory

and

normally

does

not

require

readjustment.

The

following

steps

are

therefore

necessary

only

in

cases

of

frequent

use

or

when

replacing

parts

which

have

an

effect

on

the

tape

transport

system.

Approx.

25555555

0.06mm

4-1.

TAPE

TRANSPORT

CHECK

Take-up

Guide

Pole

1.

Using

an

ordinary

cassette

tape,

switch

back

and

CTL

Head

forth

between

PLAY

and

STOP

modes

several

times.

2.

During

PLAY

mode,

observe

the

input

and

output

portions

of

the

tape

(A

and

B

in

the

figure

below)

of

the

head

drum

lead.

Confirm

that

the

tape

slips

neither

upward

nor

downward

with

respect

to

the

lead

as

shown

in

Figure

“Drum

Lead

Check-1".

Reference

line

Audio/CTL

Head

Adjustment

1.

Using

an

ordinary

cassette

tape,

set

to

CUE

mode.

Drum

npa

B

Drim

Gugut

2.

Turn

screw

©

and

adjust

for

smooth

transport

at

the

take-up

guide.

Tape

Transport

Check

3-2.

AUDIO/CTL

HEAD

HEIGHT

AND

SEPE

DUMAS

AZIMUTH

ADJUSTMENT

1.

Connect

the

noise

meter

to

the

audio

output.

2.

Play

the

test

tape

(1

KHz

color

bar

signal),

turn

nut

@

back

and

forth

a

little

at

a

time

to

set

maximum

audio

output

level.

(Rotate

in

a

clockwise

direction

to

adjust

the

settings.)

3.

Play

the

test

tape,

(8

KHz

stair

step

signal),

turn

screw

®)

back

and

forth

a

little

at

a

time

to

adjust

the

azimuth

so

that

the

audio

output

level

will

reach

a

maximum.

4.

Play

the

test

tape

(1

KHz

color

bar

signal),

and

make

|

sure

that

there

is

no

significant

change

in

the

audio

Drum

Lead

Check-1

output

level.

If

a

large

change

remains,

turn

screw

©

back

and

forth

a

little

at

a

time

to

adjust

so

that

the

level

change

will

reach

a

minimum.

5.

When

all

adjustment

is

finished,

lock

up

screw

©.

MA-4

”

4-2.

GUIDE

ROLLER

HEIGHT

e

NOTES:

ADJUSTMENT

1.

Ifthe

tape

slips

upward;

sound

is

produced

by

contact

between

the

tip

of

rotating

heads

and

1.

Slightly

loosen

the

tight-screw

of

the

supply

and

take-

the

edge

of

the

tape.

up

guide

rollers

as

shown

in

the

figure

below.

.

If

the

tape

slips

downward;

the

tape

curls

or

2.

Using

an

ordinary

cassette

tape,

set

to

PLAY

mode.

wrinkles

(or

makes

noise)

at

its

connection

3.

With

a

standard

screwdriver,

slightly

turn

the

supply

with

the

lead

face

of

the

drum

lead.

guide

roller

(no

more

than

180?

at

a

time),

and

adjust

so

that

at

the

drum

input

portion,

the

tape

travels

smoothly

along

the

drum

lead

without

slipping

upwards

or

downwards.

4.

Similarly,

adjust

the

take-up

roller

for

the

drum

output.

.

During

loading,

play,

and

unloading

of

the

cassette

tape,

observe

the

tape

at

the

supply

guide

roller,

and

take-up

guide

roller.

.

Make

sure

that

there

are

no

сий$

or

wrinkles

as

shown

in

the

figure

below.

Turn

with

a

e

incorrect

Gorset

e

standard

screwdriver

roller

Guide

Roller

Tight

Screw

O

e

Guide

Roller

.

Observe

the

tape

as

it

wraps

around

the

drum

during

PLAY

and

separates

from

the

drum

Adjusting

Guide

Roller

Height

during

STOP.

.

As

shown

in

the

figure

below,

make

sure

that

there

is

no

damage

to

C

and

D

and

that

there

is

no

contact

noise

between

the

head

tips

and

tape

edge.

NOTES:

1.

Loosen

the

tight-screw

only

enough

to

allow

the

guide

rollers

to

be

rotated.

Loosening

it

anymore

than

that

may

rotate

the

roller

inadvertently

as

a

result

of

tape

motion.

.

Rotate

the

roller

carefully

to

avoid

damage

to

the

tape.

.

When

the

adjustment

is

completed,

tighten

the

screw

and

set

by

locking

up

the

screw.

Take-up

Guide

Roller

=

ul

=

o

2

m.

a

<

-

«

o

2

<

T

(©)

Lu

=

Drum

Lead

Drum

Lead

Check-2

7.

If

a

defect

is

detected

during

check,

perform

the

follwoing

procedure

for

adjusting

Guide

Roller

height.

MA-5

4-3.

TAPE

TRANSPORT

CHECK

AT

THE

TAKE-UP

GUIDE

In

general,

no

adjustment

will

be

necessary

for

the

take-

up

guide.

However,

adjustments

or

checks

will

be

necessary

when

replacing

the

Audio/CTL

Head

or

parts

affecting

the

tape

transport

system

after

a

long

period

of

operation.

1.

Using

an

ordinary

cassette

tape,

set

to

PLAY

mode.

2.

Turn

Audio/CTL

Head

screw

O

as

shown

in

the

figure

below

and

adjust

for

smooth

transport

at

the

take-up

guide

as

shown

in

Figure

“Guide

Roller”

on

page

MA-5.

Take

Up

Guide

Roller

5.

INTERCHANGEABILITY

ADJUSTMENT

Before

using

the

test

tape,

make

sure

that

the

tape

transport

is

normal

using

an

ordinary

cassette

tape.

Also,

make

sure

that

the

switching

point

(Refer

to

EA)

is

adjusted.

If

they

are

not,

do

the

following

checks

after

adjusting.

5-1.

PRELIMINARY

CHECKS

1.

FM

Envelope

Waveform

Check

1.

Connect

the

CH-1

oscilloscope

to

TP

of

PB

ENV

and

CH-2

to

TP

of

CTL.

At

this

time,

trigger

the

oscilloscope

externally

with

the

signal

(RF

Switching

Pulse)

from

TP

of

RFS.

2.

Play

the

test

tape

(Stairstep).

З.

Use

the

Channel

Y

/

À

buttons

to

tune

the

tracking

to

center

position.

Adjust

point

@

(X

value

adjustment

point:

test

point

reference

P.MA-1)

so

that

the

FM

envelope

outputat

TP

of

PB

ENV

reaches

a

maximum.

MA-6

X

position

Adjusting

Ji

.

Using

the

Channel

V/A

buttons.

Perform

the

following

3

steps

(5-7)

by

moving

the

TP

of

CTL

waveform

in

both

positive

(+)

and

negative

(—)

directions

in

3

ms

increments.

.

Refer

to

the

figure

below.

Read

the

level

of

portion

(a)

of

the

waveform.

If

the

waveform

is

serrated

at

point

(a),

adjust

the

level

so

that

the

serrations

are

as

smooth

as

possible

(refer

to

the

second

figure).

Ideal

FM

envelope

FM

Waveform

(Maximum

Output)

Maximum

level

Minimum

level

Normal

Waveform

Examples

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