Sanyo VHR-495E Manuale utente

FILE

NO.

SERVICE

MANUAL

(

Video

Cassette

Recorder

VHR-495E

(U.K.)

VHR-475G

(Germany)

CONTENTS

SELF-DIAGNOSIS

DISPLAY

..........0cceceecuceueeeeee

2

1.

DISASSEMBLY

ices

chu

uw

dacavddigewaud

seemed

ends

5

2.

ELECTRICAL

ADJUSTMENT

............0.cc

cece

eee

9

3.

TEST

POINTS

FOR

TAPE

PATH

ADJUSTMENT

........

14

Please

see

other

materials

with

Reference

No.

4.

PARTS

LIST

given

in

table

below.

ROCESSORIES

sucut

see

syoneuiaeaeeaaatdiearaeen

15

PACKING

MATERIALS

...........00cc

cece

ceeeeeaes

15

Mechanism

|

vo51

Aaeeees

CABINET

&

GHASSIS

PARTS.

~

jucac

csadeeeare

cai

oes

15

Manual

Mechanism

MECHANISM

PARTS

...........0cccceceecceeeueees

16

ELECTRICAL

PARTS

..........cccccceccecueeeueeres

18

CIRCUIT

DIAGRAMS

(Refer

to

the

separate

volume)

PRODUCT

SAFETY

NOTICE

The

components

designated

by

a

symbol

(

A\

)

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.

PP4/E,

G2

143

155

00,

31

REFERENCE

No.

SM531434

15500(N)

D1

Vell

hlbbddd

bid

bsdbdssdissidtssdssiiisi¢iisiiiia

7

SELF-DIAGNOSIS

DISPLAY

/

CIOL

TELS

T

TTT

Pere

teteererceritsisseccsssscse,

Mechanism

Mode

Display/Head

Output

Drop

Warning

Display/Cylinder

Rotation

Accumulated

Time

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.

Some

models

(listed

later)

will

also

display

the

cylinder

rotation

accumulated

time.

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

3

seconds

each.

*

During

self-diagnosis

display,

displays

other

than

the

diagnosis

number/mechanism

mode

number

and

the

cylinder

accumulated

rotation

time

display

described

later

(some

models

only)

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.

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.

Shifts

to

the

STOP

mode.

*

The

control

of

the

cylinder

motor

is

faulty.

The

tape

winds

around

the

cylinder.

Shifts

to

the

STOP

mode.

The

take-up

ree!

does

not

rotate.

a

The

capstan

motor

does

not

rotate.

03

The

take-up

reel

is

caught.

¢

The

reel

belt

is

faulty.

The

take-up

torque

has

decreased.

The

capstan

motor

is

faulty.

Shifts

to

the

STOP

mode.

*

The

control

of

the

capstan

motor

is

faulty.

The

tape

cannot

be

loaded

with

the

Error

in

the

operations

of

the

tape

cassette

inserted.

loading

mechanism.

(But

unloading

can

be

performed.)

*

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.

Unloads,

shifts

to

the

INITIAL

mode,

and

the

power

goes

off.

Tape

loading

and

unloading

cannot

be

|

+

The

tape

guide

is

caught.

The

power

is

forcibly

turned

off

with

the

performed

with

the

cassette

inserted.

*

The

loading

motor

is

faulty.

mechanism

at

its

current

position.

*

The

control

of

the

loading

motor

is

faulty.

=

16502'1)

D2

Mechanism

Operations

and

State

After

Occurrence

Front

loads

and

shifts

to

the

STOP

or

eS

mode.

When

the

power

switch

is

turned

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.

Main

Possible

Cause

*

The

cassette

drive

mechanism

is

faulty.

The

front

door

is

caught.

Front

unloading

cannot

be

performed

when

ejecting

the

cassette.

(Front

loading

can

be

performed.)

Front

loading

and

front

unloading

cannot

be

performed

when

ejecting

the

cassette.

The

power

is

forcibly

turned

off

with

the

mechanism

at

its

current

position.

*

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

mechanism

have

not

en-

gaged

properly.

The

mechanism

becomes

1

(REVIEW)

while

moving

from

2

(IDLER),

3(STILL),

4

(BRAKE),

andto

5

(STOP).

The

mechanism

mode

switch

con-

tact

is

faulty.

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

con-

tact

is

faulty.

Carries

out

tape

take-up

operations,

shifts

to

the

INITIAL

mode,

and

the

power

goes

off.

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

V95

1

mechanism

manual.

These

manual

reference

numbers

are

shown

in

the

cover.

Mechanism

Mode

Display

Contents

Mechanism

Mode

Mechanism

Mode

CASSETTE

OUT

STANDBY

STOP

STILL

REC-PAUSE

AUDIO

DUBBING

-

PAUSE

FRAME

ADVANCE

SLOW

Mechanism

Mode

VIDEO

INSERT

VIDEO

INSERT

-

PAUSE

AUDIO/VIDEO

INSERT

REVERSE

X2

SPEED

PLAY

ee

AUDIO

DUBBING

X2

SPEED

PLAY

CUE

REVIEW

FAST

FORWARD

REWIND

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)

23>

15500(N)

D3

Head

playback

output

voltage

check

C

U

Warning

:

assette

Used

Display

Envelope

Detection

Output

Voltage

When

the

output

voltage

dif-

Envelope

detec-

4y

|-------------------

een

eee

Cassette

tion

output

ference

of

the

two

channels

with

(1C301

25

or

sf

-=-\

fT

TTT)

fo

0.5~0.95V

|

is

0.5

to

0.95V

normal

C3016

HOT

side:

zy

*

The

video

heads

of

both

are

playback

an

Fig.

2-1-1)

normal

witching

pulse

ouipus

(TP183:

see

Fig.

CH-

CH-2

2-1-2)

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

When

the

average

output

voltage

of

the

two

channels

is

less

than

Envelope

detec-

tion

output

(IC301

25

or

br

nTYre-en

nner

ene

Ferrera

eee

-+*

More

than

C3016

HOT

side:

0.95V

see

Fig.

2-1-1)

ov

Switching

pulse

(TP183:

see

Fig.

CH-1

CH-2

2-1-2)

oF

L”

blinking

Recorded

cassette

(With

tabs)

Envelope

detec-

4\y

|-----------------------------------

tion

output

ae

(IC301

25

or

©

pon----22-onennenoeecoe

ee

eetere

eee

Saks

eae

C3016

HOT

side:

Flee

SO

ee

Less

than

|

*

Tracking

adjustment

has

not

INKING

see

Fig.

2-1-1)

OV

4

0.5V

been

performed

accurately

Switching

pulse

¢

Bothvideo

heads

are

clogged

(TP183:

see

Fig.

CH-1

CH-2

is

*

Both

video

heads

have

worn

out

2-1-2}

When

the

output

voltage

dif-

ference

of

the

two

channels

is

more

than

0.95V

*

Tracking

adjustment

has

not

Envelope

detec-

tion

output

(IC301

25

or

9

b--74e--

een

en

EST

-¢

More

than

C3016

HOT

side:

0.95V

see

Fig.

2-1-1)

OV

so

teed

blinking

Rental

cassette

Sana

been

performed

accurately

;

Switching

pulse

a

«

Onewideo

heads

d

(Without

(TP183:

see

Fig.

CH-1

CH-?

e

vi

eo

head

is

clogge

tabs)

2-1-2)

*

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.

3.

Cylinder

rotation

accumulated

time

display

Only

VHR-495E

employs

this

function

(However,

this

function

will

be

equipped

only

from

the

middle

of

production.

*

Press

the

STOP

button

on

the

remote

control

for

approximately

10

seconds

and

the

cylinder

rotation

accumulated

time

excluding

the

cassette

out

and

standby

operation

time

will

be

displayed

on

the

"Hours”

display

in

units

of

100

hours.

(’33"

will

be

displayed

for

3

seconds

for

3,300

to

3,399

hours.)

*

To

erase

the

cylinder

rotation

accumulated

time

display,

press

the

RESET

button

on

the

remote

control

during

the

accumulated

time

display.

Displav

panel

Cylinder

rotation

accumulated

display

(Tape

counter

“Hours”

display)

15502(1)

M1

1.

DISASSEMBLY

1-1.

REMOVAL

OF

CABINET,

MECHANISM

UNIT,

AND

MAIN

BOARD

REMOVING

THE

CABINET

PARTS

(Fig.

1-1-1)

1.

Remove

the

cabinet

and

bottom

cover

by

removing

the

four

screws

@

and

four

screws

@).

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.

*

When

replacing

the

bottom

cover,

do

not

tighten

the

screws

(@)

too

much.

Excess

tightness

may

damage

the

screw

taps

on

the

chassis.

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.

Spread

out

the

lock

clamps

(C)

in

the

arrow

direction

slightly

and

remove

the

TM-1

PWB

as

shown

in

Fig.

1-1-2.

M-PP4H/G-1

Front

Panel

Remove

the

screw

()

at

the

back

of

the

chassis.

Remove

the

red

screw

©)

in

the

chassis,

remove

the

red

screw

©),

and

remove

the

holder

in

this

order.

Remove

the

two

screws@

and

two

screws

@)

of

the

mechanism

unit.

The

two

screws

©&

of

the

cassette

tray

can

be

removed

easily

by

pushing

the

tray

lock

lever

in

the

arrow

direction

to

remove

the

lock

as

shown

in

the

enlarge

view

A

and

by

pushing

the

lid

opener

lever

in

the

arrow

direction

to

remove

the

lock

as

shown

in

the

enlarge

view

B.

Lift

up

the

whole

mechanism

unit

and

main

board

(CP-1

PWB

assembly),

and

as

shown

in

Fig.

1-1-3,

push

the

two

lock

claws

(D)

of

the

chassis

in

the

arrow

direction

so

that

they

can

be

removed

from

the

chassis.

Main

Unit

Bottom

Cover

Fig.

1-1-1

18502(N)

M2

M-PP2L/E-2

@

og!

Terminal

Board

Tray

Lock

Lever

Lid

Opener

Lever

>

©

tos

—_

o)

Be

@

W

YN

ou

O

TM-1

PWB

M-PP2L/E-3

VP-1

PWB

Assembly

Mechanism

Main

Unit

CP-1

PWB

Assembly

15502(1)

M3

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

2.

Operate

the

unit

using

the

buttons

on

TM-1

PWB

or

the

as

a

whole

on

a

flat

surface

with

the

foil

side

of

the

main

remote

control.

board

facing

up.

M-PP4H/G-4

CP-1

PWB

Assembly

(Foil

side)

Terminal

Boord

Cassette

Compartment

Mechanism

Main

Unit

Fig.

1-1-4

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

main

unit.

front

panel

to

the

chassis.

2.

Set

the

cassette

door

to

half-opened

state

as

shown

in

Fig.

1-1-5,

and

install

the

front

panel

to

the

chassis.

M-PP4H/G-5

Jutted

part

of

Cassette

Holder

Front

Panel

Cassette

Door

(Position

A)

Cassette

Door

(Position

B)

Fig.

1-1-5

15500(N)

L1

1-4.

MAIN

CIRCUIT

BOARD

LOCATIONS

L-PP4/E

AD-1

PWB

3

in

1

Tun

(Tuner/IF/RE

Converter)

AD-5

PWB

for

“at

VP-1

PWB

Assembly

CP-1

PWB

Assembly

ce

PW-1

PWB

eae,

for

VHR-495E

TM-8PWB

for

VHR-475G

15500(N)

S14

2.

ELECTRICAL

ADJUSTMENT

VCR

PRESETTING

There

are

two

types

of

models,

one

type

is

equipped

with

the

OSD

(on

screen

display)

and

the

other

is

not.

For

the

one

with

the

OSD

function,

select

the

required

mode

according

to

the

following

steps.

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

at

once.

When

steps

1

to

3

have

been

finish,

ready

to

operate

the

all

operating

mode.

‘

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

a

cassette

tape

is

loaded,

auto-tracking

will

be

set

immediately

after

starting

the

first

playback,

as

this

will

deviate

the

tracking

center

set.

Be

sure

to

press

the

channel

buttons

(+)

or

(~)

several

times

directly

after

starting

playback

to

prevent

auto-tracking

from

being

set.

2-1-1.

TEST

EQUIPMENT

AND

STANDARDS

REQUIRED

Oscilloscope

Vertical

sensitivity

:5

mV/DIV,

external

trigger

Bandwidth

:

more

than

10

MHz

Alignment

Tape

VHJ-0009

or

VHJ-0023.

:

SP

mode,

monoscope,

6

KHz

Blank

Tape

VHS-type

cassette

tape

FC

2-1-2.

LOCATION

OF

ADJUSTMENT

POINTS

P36200B1S9

3

in

1

Tuner———»

CN351

TP201(+)—»>

it

Enea

ates

a2-------

ee

c

'

9%

These

VRs

are

posi-

tioned

with

the

models.

TM-9

or

TM-8

PWB

15500(N)

S2

P37400B2S5

TP181

Shield

case

VP-1

PWB

Assembly

Note:

*

Self-recording

means

“Record

any

broadcasting

or

video

signal

and

play

back

the

just-recorded

portion.”

2-1-3.

SWITCHING

POSITION

ADJ.

Measuring

Equipment

|

Adj.

Condition

(VIDEO

OUT)

Alignment

tape

TP183

(SW-P)

(VHJ-0009

or

Adj.

Location

Adj.

Value

VR351

(SW-P)

6.5H+0.5H

2.

Setthe

tracking

control

position

to

the

center

by

pressing

CHANNEL

buttons

(+)

and

(-)

simultaneously.

CHANNEL

buttons

together.

3.

Adjust

VR351

(SW-P)

so

that

the

width

of

“T”

becomes

TP101

Oscilloscope

PLAY

mode

VHJ-0023)

1.

Play

back

the

alignment

tape.

Note:

To

set

tracking

to

center

accurately,

press

the

two

6.5

H

+

0.5

H

as

shown

in

Fig.

2-1-3.

T=6.5H+0.5H

0.5H

Front

edge

of

vertical

sync

signal

RF.

SW.

PULSE

TP183

TP182

Fig.

2-1-2

2-1-4.

SLOW

TRAKCING

ADJ.

Measuring

Equipment

|

Adj.

Condition

Picture

of

Color

bar

generator

Self-recording

monitor

TV

or

(SP

mode)

broadcasting

SLOW

mode

monitor

Blank

tape

Self-recording

(LP

mode)

SLOW

mode

Blank

tape

Adj.

Value

1.

Set

the

tracking

control

to

the

center

position

by

press-

ing

CHANNEL

buttons

(+)

and

(-)

simultaneously.

2.

Play

back

the

self-recorded

portion

and

set

the

VCR

in

the

SLOW

mode

with

the

remote

control

unit.

3.

Confirm

that

there

is

no

noise

on

the

slow

playback

display.

4.

Press

the

CHANNEL

button

(+)

about

three

times

and

check

that

noise

dose

not

appear

at

the

upper

part

of

the

display.

5.

Adjust

the

tracking

control

to

the

center

again.

6.

Press

the

CHANNEL

button

(-)

the

same

number

of

times

as

in

the

step

4

(about

three

times)

and

check

that

noise

dose

not

appear

at

the

lower

part

of

the

display.

Note:

¢

CHANNEL

button

also

servers

as

TRACKING

button.

Adj.

Location

CHANNEL

(+)

button

CHANNEL

(-)

button

—~10—

Sanyo VHR-495E Manuale utente

Manuali Sistema VCR popolari di altre marche