Sanyo VHR-279E Manuale utente

FILE

NO.

SERVICE

MANUAL

Video

Cassette

Recorder

VHR-279E

(Product

Code

:

143

179

02)

VHR-289E

(Product

Code

:

143

179

03)

(U.K.)

VHR-269SP

(Product

Code

:

143 179

05)

VHR-279SP

(Product

Code

:

143 179

04)

(Spain)

(VHR-279E,

VHR-269SP,

VHR-279SP,

VHS

V

-

R-2

49

EX

VHR-249EX,

VHR-279EV

(Product

Code

:

143 179

12)

(Spain)

CONTENTS

(Portugal)

1.

DISASSEMBLY

........cccecccccecssceerecseesssseceeessenenessarenseeteeeeseees

5

2.

ELECTRICAL

ADJUSTMENT

cccsesssssssssesssssssssssseeseseeeeense

9

V

ia

R-2

79

EV

3.

TEST

POINTS

FOR

TAPE

PATH

ADJUSTMENT

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

11

4.

PARTS

LIST

(Product

Code

:

143

179

22)

MECHANISM

PARTS

..cccsssscsssscsssssssscsssssseosssssssccccsssssnsssseees

12

(Europe)

CABINET

&

CHASSIS

PARTS

.......cccseceseesereseseeseeseneneneesee

14

Please

see

other

materials

with

Reference

ELECTRICAL

PARTS

ecazccssecccsciecicstecsheess

cavenesacseevanestesaaaasee

15

number

given

in

table

below.

ACCESSORIES

sii.

ccsecciccdzcchedi

vs

de

Seavidaceceivasscodecentenonserdeseessns

21

PACKING

MATERIALS.

..........::cccccssececeeesereeeeesceeauseseneneeenens

22

Materials

|

Model

No.

|

Reference

No.

CIRCUIT

DIAGRAMS

(Refer

to

the

separate

volume)

Mechanism

VC

MM531683

Manual

Mechanism

PRODUCT

SAFETY

NOTICE

The

components

designated

by

a

symbol

(/\)

in

this

schematic

diagram

designates

components

whose

value

are

of

special

significance

to

product

safety.

Should

any

component

designated

by

a

symbol

need

to

be

replaced,

use

only

the

part

designated

in

the

parts

List.

Do

not

deviate

from

the

resistance,

wattage,

and

voltage

ratings

shown.

NOTE:

1.

Parts

order

must

contain

model

number,

part

number,

and

description.

2.

Substitute

parts

may

be

supplied

as

the

service

parts.

3.

N.S.P.

:

Not

available

as

service

parts.

Design

and

specifications

are

subject

to

change

without

notice.

SE2L/E2,

E,

SE2/SP2,

SP,

EX3,

EV3

REFERENCE

No.SM5310003

SELF-DIAGNOSIS

DISPLAY

Mechanism

Mode

Display

/

Head

Output

Drop

Warning

Display

This

unit

displays

the

diagnosis

contents

of

abnormalities

and

the

mechanism

mode

on

its

display

panel

in

2-digit

numbers.

When

the

head

playback

output

has

dropped,

the

"L"

sign

will

be

blinked.

These

display

shows

the

outline

of

the

problems.

Use

it

as

a

reference

when

servicing

the

unit.

1.

Self-Diagnosis

Contents

and

Mechanism

Mode

Display

*

When

the

STOP

button

on

the

remote

control

is

pressed

for

about

10

seconds

continuously,

the

self-diagnosis

number

will

be

displayed

on

the

reception

channel

display

of

the

display

panel

and

number

indicating

the

failed

mechanism

mode

(changed

mode

when

being

shifted)

on

the

tape

counter

"seconds"

display

for

10

seconds

each.

*

During

self-diagnosis

display,

displays

other

than

the

diagnosis

number/mechanism

mode

number

will

be

turned

off

and

when

displays

end,

the

normal

display

will

be

returned

automatically.

*

Refer

to

"Self-Diagnosis

Contents"

for

the

self-diagnosis

numbers

and

the

"Mechanism

Mode

Display

Contents"

for

the

mechanism

mode

numbers.

*

When

the

"0"

button

on

the

remote

control

unit

is

pressed

during

display,

and

clearing

the

self-diagnosis

display

and

mechanism

mode

display.

Display

panel

Self-Diagnosis

number

Mechanism

mode

number

(Reception

channel

display)

(Tape

counter

"Seconds"

display)

Self-Diagnosis

Contents

;

.

Mechanism

Operations

and

Problem

Main

Possible

Cause

State

After

Occurrence

There

is

no

abnormality

in

the

mechanism.

The

cylinder

motor

does

not

rotate.

|

*

The

cylinder

motor

is

faulty.

¢

The

control

of

the

cylinder

motor

is

faulty.

*

The

tape

winds

around

the

cylinder.

The

take-up

reel

or

supply

reel

does

|

*

Thetake-up

reel

orsupply

reel

is

caught.

not

rotate.

°

The

reel

belt

is

faulty.

‘|

©

The

reel

torque

has

decreased.

*

The

capstan

motor

is

faulty.

*

The

control

of

the

capstan

motor

is

faulty.

the

power

goes

off.

the

power

goes

off.

The

capstan

motor

does

not

rotate.

the

power

goes

off.

Shifts

to

the

STANDBY

mode,

and

Shifts

to

the

STANDBY

mode,

and

Shifts

to

the

STANDBY

mode,

and

¢

Error

in

the

operations

of

the

tape

Icading

mechanism.

¢

Foreign

particles

in

the

tape

load-

ing

mechanism.’

¢

The

tape

end

sensor

is

faulty.

¢

The

reel

brake

of

the

tape

cassette

has

not

been

released.

¢

The

tape

guide

is

caught.

¢

The

loading

motor

is

faulty.

*

The

control

of

the

loading

motor

is

faulty.

The

tape

cannot

be

loaded

with

the

cassette

inserted.

(But

unloading

can

be

performed.)

and

the

power

goes

off.

Tape

loading

and

unloading

cannot

be

performed

with

the

cassette

in-

serted.

Unloads,

shifts

to

the

INITIAL

mode,

The

power

is

forcibly

turned

off

with

the

mechanism

at

its

current

position.

Problem

Main

Possible

Cause

Mechanism

Operations

and

State

After

Occurrence

Front

unloading

cannot

be

performed

when

ejecting

the

cassette.

(Front

loading

can

be

performed.)

¢

The

cassette

drive

mechanism

is

faulty.

*

The

front

door

is

caught.

Front

loads

and

shifts

to

the

STOP

or

INITIAL

mode.

¢

When

the

power

switch

is

tumed

on

before

eject

operations:

Shifts

to

the

STOP

mode.

«

When

the

power

switch

is

turned

off

before

eject

operations:

Shifts

to

the

INITIAL

mode

and

the

power

goes

off.

—

Front

loading

and

front

unloading

can-

not

be

performed

when

ejecting

the

cassette.

¢

The

tape

cassette

is

caught

in

the

cassette

drive

mechanism.

*

The

main

cam

and

front

rack

gear

of

the

front

loading

mechanism

have

not

engaged

properly.

¢

The

gears

of

the

front

loading

drive

erly.

mechanism

have

not

engaged

prop-

The

power

is

forcibly

turned

off

with

the

mechanism

at

its

current

position.

The

mechanism

becomes

1

(RE-

VIEW)

while

moving

from

2

(IDLER),

3

(STILL),

4

(BRAKE),

and

to

5

(STOP).

¢

The

mechanism

mode

switch

con-

The

power

is

forcibly

turned

off

with

the

mechanism

at

its

current

position.

The

mechanism

becomes

7

(INITIAL)

while

moving

from

1

(REVIEW),

2

(IDLER),

3

(STILL),

4

(BRAKE),

and

to

5

(STOP).

¢

The

mechanism

mode

switch

tact

is

faulty.

Carries

out

tape

take-up

operations,

shifts

to

the

STANDBY

mode,

and

the.

power

goes

off.

0

|

The

capstan

motor

does

not

rotate

and

cassette

tape

eject

when

cas-

sette

tape

insert.

The

cylinder

motor

does

not

rotate

and

cassette

tape

eject

when

cas-

sette

tape

insert.

The

supply

reel

does

not

rotate

and

cassette

tape

eject

when

tape

un-

loading.

tact

is

faulty.

con-

*

The

capstan

motor

is

faulty.

¢

The

control

of

the

capstan

motor

is

faulty.

¢

The

cylinder

motor

is

faulty.

¢

The

control

of

the

cylinder

motor

is

faulty.

¢

The

supply

reel

is

caught.

¢

The

reel

belt

is

faulty.

¢

The

reel

torque

has

decreased.

Shifts

to

the

EJECT

mode.

Protect

cassette

tape.

Shifts

to

the

EJECT

mode.

Protect

cassette

tape.

Shifts

to

the

EJECT

mode.

Protect

cassette

tape.

Note:

For

details

of

mechanism

operations

corresponding

to

the

mechanism

positions

of

the

self-diagnosis

numbers

08

and

09

above,

refer

to

the

separate

volume

on

the

VC

mechanism

manual.

These

manual

reference

numbers

are

shown

in

the

cover.

Mechanism

Mode

Display

Contents

Mechanism

Mode

No.

Mechanism

Mode

No.

Mechanism

Mode

00

01

02

03

04

05

06

CASSETTE

OUT

STANDBY

STOP

STILL

REC-PAUSE

AUDIO

DUBBING-PAUSE

FRAME

ADVANCE

AUDIO

DUBBING

X2

SPEED

PLAY

CUE

REVIEW

FAST

FORWARD

REWIND

VIDEO

INSERT

VIDEO

INSERT-PAUSE

AUDIO/VIDEO

INSERT

REVERSE

X2

SPEED

PLAY

OTHERS

2.

Head

Output

Drop

Warning

Display

*

When

the

STOP

button

on

the

remote

control

is

pressed

for

10

seconds

continuously

10

seconds

after

play

starts,

"L"

will

be

displayed

blinking

at

the

first

digit

of

the

minutes

position

on

the

tape

counter

when

the

head

output

is

lower

than

the

specified

value

to

indicate

an

abnormality.

*

—

The

cause

of

the

abnormality

may

be

due

to

drop

in

the

playback

output

caused

by

drop

in

the

efficiency

of

the

cassette

used

or

head

clogging.

Refer

to

"Head

Playback

Output

Voltage

Check"

as

a

means

to

judge

the

abnormality.

Display.

panel

Head

output

drop

warning

display

(Tape

counter

"1st

digit

of

Minutes."

position)

Head

playback

output

voltage

check

Cassette

Used

Cassette

with

normal

playback

output

Recorded

cassette

(with

tabs)

Rental

cassette

(without

tabs)

Warning

Display

"L"

blinking

"L"

blinking

"L"

blinking

Envelope

Detection

Output

Voltage

Envelope

detec-

4y

tion

output

(IC301

85

or

C3016

HOT

side:

see

Fig.

2-1-1)

Switching

pulse

(TP

183:

see

Fig.

2-1-1)

Envelope

detec-

tion

output

(IC301

85

or

C3016

HOT

side:

see

Fig.

2-1-1)

Switching

pulse

(TP

183:

see

Fig.

2-1-1)

Envelope

detec-

tion

output

(1C301

85

or

C3016

HOT

side:

see

Fig.

2-1-1)

Switching

pulse

(TP

183:

see

Fig.

2-1-1)

Envelope

detec-

tion

output

(1C301

85

or

C3016

HOT

side:

see

Fig.

2-1-1)

Switching

pulse

(TP183:

see

Fig.

2-1-1)

CH-1

CH-2

-

¥

More

than

-¥

More

than

Main

Cause

When

the

output

voltage

differ-

ence

of

the

two

channels

is

0.5

to

0.95V

¢

The

video

heads

of

both

are

normal

When

the

output

voltage

differ-

ence

of

the

two

channels

is

more

than

0.95V

¢

Tracking

adjustment

has

not

been

performed

accurately

¢

One

video

head

is

clogged

*

One

video

head

has

worn

out

When

the

average

outputvolt-

age

of

the

two

channels

is

less

than

0.5V

¢

Tracking

adjustment

has

not

been

performed

accurately

*

Both

video

heads

are

clogged

¢

Both

video

heads

have

worn

out

When

the

output

voltage

dif-

ference

of

the

two

channels

is

more

than

0.95V

*

Tracking

adjustment

has

not

been

performed

accurately

¢

One

video

head

is

clogged

*

One

video

head

has

worn

out

*

Some

rental

cassettes

may

have

extremely

low

video

playback

outputs

even

when

both

video

heads

are

normal.

As

the

average

output

voltage

of

the

two

heads

may

be

less

than

0.5V

for

some,

no

warning

displays

will

be

shown.

1.

DISASSEMBLY

1-1.

REMOVAL

OF

CABINET,

MECHANISM

UNIT,

AND

MAIN

BOARD

REMOVING

THE

CABINET

PARTS

(Fig.

1-1-1)

1.

Remove

the

cabinet

by

removing

the

four

screws

(1).

2.

Remove

the

front

panel

by

removing

the

locks

of

the

clamps

(A)

using

a

screwdriver,

etc.

and

slightly

rotating

the

bottom

part

in

the

direction

of

the

arrow.

Notes:

«

Electrical

adjustments

for

the

this

model

can

be

performed

with

only

the

cabinet

removed.

M-SE2V/E2-1

REMOVING

THE

MECHANISM

MAIN

UNIT

AND

THE

CP-1

PWB

ASSEMBLY

(Fig.

1-1-2

and

1-1-3)

After

removing

the

cabinet

parts,

remove

the

mechanism

unit

and

the

CP-1

PWB

assembly

connected

as

follows.

1.

Remove

the

five

screws

(2)

as

shown

in

Fig.

1-1-2.

2.

Remove

the

two

screws

(3)

at

the

CP-1

board,

and

then

disconnect

the

bottom

cover.

Remove

the

two

screws

(4)

and

two

screws

(5)

of

the

mechanism

unit.

The

two

screws

(5)

of

the

cassette

tray

can

be

removed

easily

by

pushing

the

lid

opener

lever

in

the

arrow

direction

to

remove

the

lock

as

shown

in

the

enlarge

view.

Lift

up

the

whole

mechanism

unit

and

main

board

(CP-1

PWB

assembly),

and

as

shown

in

Fig.

1-1-3,

so

that

they

can

be

removed

from

the

chassis.

3.

Fig.

1-1-1

$14)

Terminal

Board

M-SE2L/E2-2

Cassette

Tray

Lid

Opener

Lever

5

>

8

5

6

a

M-SE2L/E2-3

1-2.

TEMPORARILY

SETTING

UP

AND

CONNECTING

CP-1

PWB

ASSEMBLY

The

following

is

an

example

of

how

to

place

and

connect

the

main

board

without

a

jig,

when

repairing

the

CP-1

PWB

assembly.

1.

Place

the

mechanism

unit

and

main

board

up

side

down

as

2.

Operete

the

unit

using

the

buttons

on

CP-1

PWB

or

the

a

whole

on

a

flat

surface

with

foil

side

of

the

main

board

remote

control.

facing

up.

:

hess

CP-1

PWB

Assembly

<

side)

Screws

(6)

et

>)

>

Terminal

Board

C

™A

DS

nl

rel

Cassette

Compartment

.

Main

Unit

TM-2

PWB

1-3.

INSTALLATION

OF

THE

FRONT

PANEL

When

installing

the

front

panel

to

the

chassis

after

repaires

and

adjustments.

1.

Pressing

down

the

door

opener

lever

of

the

mechanism

Note:

Opened

cassette

door

position

does

not

install

the

front

main

unit.

panel

to

the

chassis.

2.

Setthe

cassette

door

to

half-opened

state

as

shown

in

Fig.

1-1-5,

and

install

the

front

panel

to

the

chassis.

M-SE2U/E2-5

Jutted

part

of

Cassette

Hold

Front

Panel

Door

Opener

Lever

Cassette

Door

(Position

A)

Cassette

Door

(Position

B)

Fig.

1-1-5

Note:

Before

assembling

the

mechanism

unit

and

the

CP-1

board,

check

the

eject

mode

positioning

marks

as

shown

in

Fig.

1-1-6

and

Fig.

1-1-7.

Crescent

slide

L-SE2VE

3

in

1

Tuner

CP-1

PWB

Assembly

(Tuner/IF/RF

Conv.)

TM-2

PWB

for

VHR-289E

TM-1

PWB

for

VHR-289E

2.

ELECTRICAL

ADJUSTMENT

VCR

PRESETTING

This

VCR

need

three

basic

presetting

by

using

the

menus

displayed

on-screen.

After

all

connection

have

been

made,

then

follow

steps

1

to

3

to

preset

the

VCR.

The

three

presetting

steps

will

be

displayed

in

sequence

on

TV

screen.

The

setting

are

entered

with

the

remote

control.

Turn

on

the

VCR

1.

Adjusting

the

TV

receiver

to

the

video

channel:

The

AUTO

SETUP

screen

will

appear.

When

the

video

channel

has

been

preset,

press

the

OK

button

on

the

remote

control.

;

2.

Country

selection:

Using

the

numeric

button,

select

the

country

of

use.

3.

Language

selection:

When

the

desired

language

has

been

select,

press

the

MENU/TV

button

directly

before

prevent

auto

tuning

will

start.

When

steps

1

to

3

have

been

finish,

ready

to

operate

the

all

operating

mode.

2-1.

SERVO

CIRCUIT

ADJUSTMENT

¢

These

adjustments

should

be

done

upon

completion

of

the

tape

transport

adjustments.

¢

If

the

tape

transport

adjustments

(except

the

tilt

adjustment)

are

done

after

these

adjustments,

follow

the

procedures

again

in

section

2-1-3,

"Switching

position

adj."

¢

When

acassette

tape

is

loaded,

auto-tracking

will

be

set

immediately

after

starting

the

first

playback.

As

this

will

daviate

the

tracking

center

set,

be

sure

to

press

the

channel

buttons

And

W

once

directly

after

starting

playback

to

prevent

auto-tracking

from

being

set.

2-1-1.

TEST

EQUIPMENT

AND

STANDARDS

REQUIRED

Vertical

sensitivity

:

5

mV/DIV,

external

trigger

Bandwidth

>

more

than

10

MHz

VHJ-0009

or

VHJ-0023

:

SP

mode,

monoscope,

6

KHz

[a

2-1-2.

LOCATION

OF

ADJUSTMENT

POINTS

PIB47000E

TP182

| |

TP183

C3016

o

(Parts

side)

1C301

7

CP-1

PWB

(Foil

side)

Fig.

2-1-1

Note:

¢

Set

the

REC/PLAY

SPEED

button

to

indicator

panel

in

the

SP

mode.

Start

of

play

=

REC

button

*

Self-recording

means

"Record

any

broadcasting

or

video

back

display

ON

signal

and

playback

the

just-recorded

portion."

2-1-3.

SWITCHING

POSITION

ADu.

:

ae

'More

jst

;

(“Within

3

Within

2-ypereit

Adjusting

—,

secs.

—

SeCS.

period

|

ab

15secs.

!

Measuring

Point

|

Measuring

Equipment}

Adj.

Condition

TP101

Oscilloscope

PLAY

(SP)

mode

(VIDEO

OUT)

Alignment

tape

TP183

VHJ-0009

(RF

SW-P)

(PM-S6)

Fig.

2-1-3

=

+

Adj.

Location

Adj.

Value

T=6.5H

£0.5H

REC

button

CHANNEL

(A/¥)

button

‘6.5H+0.5H

PLAY

button

1.

At

playback

starts,

press

the

REC

button

3

times

within

3

seconds

after

the

playback

picture

comes

out.

However,

Front

edge

of

these

3-push

must

be

done

within

2

seconds,

and

last

push

mortem

sytem

must

be

kept

pressed

for

0.5

seconds.

(Fig.

2-1-3)

|

Fall

RF.

SW

PULSE

2.

"P

0:00"

is

appeared

in

FLD,

and

it

becomes

the

adjustment

y

u

mode.

This

indication

value

changes

automatically,

and

Fig.

2-1-4

6.5

H

adjustment

is

done.

When

this

value

stops,

adjust-

ment

value

almost

becomes

6.5

H.

3.

Observe

the

video

output

signal

by

the

oscilloscope,

2-1-4.

SP

STILL

V-LOCK

ADJ.

triggered

by

the

fall

down

point

of

RF

SW

PULSE

(TP183),

; -

: - : -

and

confirm

that

a

front

edge

of

V-SYNC

is

delayed

for

6.5

H

+

0.5

H

from

the

fall

down

point

of

RF

SW

PULSE.

(Fig.

Picture

of

Monoscope

pattern

|

Self-recording

2-1-4)

monitor

(SP

mode)

4.

After

the

adiustment

data

is

fixed

(it

should

be

within

15

STILL

mode

seconds

from

the

adjustment

mode

start),

press

the

PLAY

Adi.

Val

button

more

than

1

second.

Then

the

indication

changes

to

JEOCeuOR

eee

"P

—:-—",

it

writes

the

data

(delay

quantity)

to

the

E7PROM.

CHANNEL

A

or

¥

buiton

The

minimum

vertical

shake

(If

it

passes

through

15

seconds

before

pushing

the

PLAY

button,

the

intake

of

the

data

isn't

done,

and

it

finishes

the

1.

Set

the

REC/PLAY

SPEED

button

to

the

SP

mode.

adjustment

mode.)

2.

Play

back

the

own

recorded

portion

of

the

tape

and

then

set

5.

Ifitis

notin

6.5

H

+

0.5

at

the

time

of

the

confirmation

by

the the

VCR

in

the

STILL

mode.

above

3.,

make

manual

fine

adjustment

by

pressing

the

3.

Press

the

CHANNEL

Aor

Whutton

so

that

the

vertical

shake

CHANNEL

buiton,

and

do

the

operation

of

4.

of

picture

becomes

its

minimum.

2-2.

IF

CIRCUIT

ADJUSTMENT

¢

inthis

model,

the

circuits

of

the

TUNER,

IF,

and

RF

Note:

The

3

in

tuner

dose

not

need

any

adjustments,

because

converter

have

been

made

into

one.

Therefore,

should

one

precise

adjustments

were

down

before

shipment.

circuit

malfunction,

the

whole

unit

must

be

replaced.

¢

The

adjustments

for

the

IF

(RF

AGC)

circuit

of

the

3

in

1

tuner

are

described

below.

2-2-1.

TEST

EQUIPMENT

AND

STANDARD

REQUIRED

Monitor

TV

—10—

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