Sanyo VHR-1110 Series Bedienungsanleitung

SERVICE

MANUAL

COLOUR

VIDEO

CASSETTE

RECORDER

VHS

PAL

Models

VHR-1110

eee

VHR-1700M

VHR-2300

VHR-2500

Series

and

VHR-2350EE

VHR-2700

MECHANISM

DESCRIPTION

AND

MECHANISM

ADJUSTMENT

TABLE

CONTENTS

MECHANIMS

DESCRIPTION

PAGE

1-1.

MAIN

MECHANISM

COMPONENTS

AND

LAYOUT

DIAGRAM

...........

0.00

eve

eeee

1~2

1-2,

OUTLINE

MECHANISM

OPERATION

..........

0...

cece

eee

eens

1-3...

DIFFERENCES

FROM

MODELS

eee

Rea

wae

3~5

1-4,

MECANISM

OPERATION

INEACH

MODE

...........

cece

cee

eee

“OPERATION

JIN-EACH

MODE:

2.4.54

and

mae

eee

ORM

7~10

MECHANISM

ADJUSTMENT

2-1.

JIGS

AND

TOOLS

FOR

ADJUSTMENT...

10...

eee

tees

2-2.

STANDARD

MAINTENANCE

TIMETABLE...

1...

ee ee

tees

CLE

IN Gi

set

seca

akg

Meck,

Wee

ott

Sole

tee

etc

hte

here.

nepal

nara

tere

Beata

2-4.

MECHANISM

REPAIR

AND

PARTS

REPLACEMENT

........

0...

cee eee

eee

14~21

2-5.

PREPARATIONS

FOR

ADJUSTMENT...

0.0...

0...

eee

ens

2-62

“ADJUSTMENT

«sae

Seeley

iees

OSE

ASE

Ses

23~28

2-7.

CHECKING

AND

ADJUSTING

THE

TAPE-TRANSPORT

SYSTEM

..........

0000s

eee

29~31

Reference

No.

WM-18674

MECHANISM

DESCRIPTION

1-1.

MAIN

MECHANISM

COMPONENTS

AND

LAYOUT

DIAGRAM

(Figs.

1-1-1

and

1-1-2)

Motor

Full-width

erase

head

RABIES

DCN

ASO

IEE

Impedance

roller

avin

Capstan

Motor

shaft

Leading

guide

Review

guide

(Supply-side)

lever

Leading

guide

(Take-up

side)

Brake

Tape

Sensor

™

Back-Tension

lever

Brake

Band

Take-up

Reel

base

Supply

reel

base

ees

Soft

Brake

(Take-up

side)

Soft

Brake

(Supply

side)

Erase

Prevention

Main

Brake

Idler

stopper

Roller

Assy.

Main

Brake

(Supply

side)

(Take-up

side)

Fig.

1-1-1

Mechanism

Assembly

Top

View

main

changed

parts

compared

former

models

VHR-1100,

VHR-1300

and

VHR-1500.

Pulley

(Loading

Motor)

Small

belt

Two-step

Pulley

Large

Beit

Small

Pulley

eee

ress

tit

geal

Press-fit

gear

nae

(Supply

side)

Capstan

Motor

Large

Pulley

Capstat

belt

;

Two-step

gear

(small)

Two-step

gear

Main

Slide

Sector

gear

Solenoid

(VHR-2500

Sneeptaiar

‘

Momentary

Brake

Intermediate

gear

series

only)

Mode

Detection

switch

Review

gear

Main

slip

gear

POM.

Lever

Sub

slide

Momentary

Brake

slip

gear

Fig.

1-1-2

Mechanism

Assembly

Bottom

View

1-2.

OUTLINE

MECHANISM

OPERATION

The

greatest

change

compared

former

models

(VHR-

1100,

VHR-1300

and

VHR-1500

series)

the

change

rotation

both

reel

bases

from

the

reel

motor

the

capstan

motor.

well

the

movement

both

guides,

the

transition

device

each

mode,

and

the

safety

device,

are

fundamentally

the

same

for

models

(VHR-1100,

VHR-1300

and

VHR-1500

series),

their

description

omitted

here.

1-3.

DIFFERENCES

FROM

MODELS

(VHR-1100,

VHR-1300

and

VHR-1500

series)

There

are

five

points

which

are

different,

regarding

the

mechanism’s

main

components,

between

this

mechanism

and

that

former

models.

The

operation

those

components

described

below.

1-3-1.

Method

drive

transmission

both

reel

bases

using

this

mechanism,

the

reel

motor

eliminated,

and

the

rotation

the

capstan

transmitted

via

the

belt

the

main

slip

gear;

the

direction

reel

base

rotation

depends

upon

the

direction

rotation

the

capstan.

result,

can

seen

that

the

function

the

newly

added

main

slip

gear

very

important.

Figure

1-3-1

shows

the

rotation-transmission

system.

*Main

slip

gear:

The

slip

mechanism

functions

during

the

PLAY,

REC,

F/R-SEARCH

and

SLOW

modes.

other

words,

because

force

transmitted

from

the

pulley

gear

the

drive

gear

via

the

felt

for

slippage

during

these

modes,

the

rpm

the

drive

gear

caused

reduced

less

than

the

rpm

the

pulley

gear.

The

pulley

gear

and

the

drive

gear

are

locked

during

the

F-FWD

and

REW

modes,

with

the

result

that

the

rotation

the

pulley

gear

and

the

drive

gear

the

same

rotation.

Review

gear:

The

review

gear

engaged

with

the

main

slip

gear

during

the

R-SEARCH

mode.

Capstan

Motor

Main

slip

gear

Drive

gear

Pulley

gear

Supply,

Take-up

reel

base

Drive

gear

Felt

for

slippage

Pulley

gear

Roller

Assy.

Fig.

1-3-1

1-3-2.

Main

slip

gear

(Fig.

1-3-2(a)

and

Fig.

1-3-2(b))

The

main

slip

gear

composed

the

pulley

gear

and

the

drive

gear.

slip

mechanism

made

felt

incorporated

the

drive

gear

side.

Figure

1-3-2(a)

shows

the

ordinary

conditions

(PLAY,

REC,

F/R-SEARCH,

UNLOADING,

SLOW,

etc.).

When

the

capstan

motor

rotates

during

these

conditions,

the

pulley

gear

caused

driven,

and

thus

the

drive

gear

caused

driven

via

the

slip

mechanism.

Figure

1-3-2(b)

shows

the

fast

forward

and

rewind

condi-

tions.

The

lever

caused

move

the-»direction

the

sub

slide

being

activated

the

direction

the

movement

the

cam.

result

this

action,

the

spring

coil

located

between

the

lever

and

the

direct

lever

caused

pulled,

with

the

result

that

the

lock

ring

caused

activated

the

lifting

direction.

result,

the

pulley

gear

and

the

drive

gear

are

caused

locked,

and,

when

the

capstan

motor

rotates,

the

pulley

gear

and

drive

gear

rotate

unified

component,

with

the

result

that

there

slippage.

Pulle

eet

ald

Main

slip

Spring

Direct

lever

Fig.

1-3-2(a)

Slip

condition

lever

Direct

lever

Fig.

1-3-2(b)

Lock

condition

—4q—

1-3-3.

Review

gear

This

gear

functions

during

the

R-SSEARCH

mode.

Because

tape

take-up

during

the

R-SSEARCH

mode

via

the

drum,

stronger

rotation

(than

for

the

F-SEARCH

mode)

necessary.

Detection

Main

slide

(The

rotation

torque

during

the

F-SSEARCH

mode

+15g-cm,

and

during

the

RSSEARCH

mode

200

+30g-cm.)

For

this

reason,

the

review

gear

used

increase

the

rotation

torque

the

main

slip

gear

(pulley

gear

and

drive

gear).

Main

Slip

Gear

Review

gear

Moving

the

main

slide

from

PLAY

mode

R-SEARCH

mode@®.

Fig.

1-3-3

1-3-4,

Capstan

“soft’”’

braking

solenoid

(Fig.

1-3-4

VHR-2500

series

only)

The

“soft”

braking

switched

during

the

SLOW

mode

and

the

STILL

mode.

The

capstan

motor

operates

under

intermittent

drive

conditions

during

the

SLOW

mode

and

the

STILL

mode.

order

stabilized

the

intermittent

drive

the

capstan

motor,

solenoid

used

apply

braking

the

capstan

motor.

Capstan

Motor

Capstan

soft

brake

Solenoid

The

voltage

applied

from

the

system-control

circuitry

both

terminals

the

solenoid

during

the

SLOW

mode

and

the

STILL

mode

13V.

1-3-5.

brake

(Fig.

1-3-5)

order

eliminate

tape

loosening

slack

during

the

operation,

braking

applied

the

supply

reel

base

side

during

When

the

operation

finished,

the

brake

released.

ifn

Pde

brake

Supply

reel

base

Idler

stopper

1-4.

MECHANISM

OPERATION

EACH

MODE

ets

Capstan

Motor

Drum

Motor

(Table

cerns

Supply

Take-up

|Supply

Take-up

side

SoftBrake

Brake

Mode

Detection

Brake

(Supply

Reel

Base)

Position

OFF

ON>OFF

PLAY/REC|

OFF

(CW)

oan

F-SEARCH|

OFF

(CW)

con

REVERS

rite

ee.

bee

ace

gee

Ane

Rox

SLOW

(VHR-2500|

OFF

series

only)

(cew)

ON>OFF

PAUSE

OFF

(ewocew)

coed

OFF

ata

OFF

ON>OFF

EJECT

icw)

OFF

eewl

OFF OFF

ON ON

OFF

Gd)

Notes:

CW:

clockwise

CCW:

counterclockwise

The

rotation

the

front-loading,

reel,

capstan

and

drum

motors

seen

from

the

chassis

top,

and

the

rotation

the

motor

seen

from

the

bottom

the

chassis.

ON/OFF

brakes:

ON:

Brake

applied

reel

base.

OFF:

Brake

not

applied

reel

base.

Table

1-4-1

1-5,

OPERATION

EACH

MODE

For

this

model,

both

ree!

bases

are

rotated

according

the

drive

the

capstan

motor.

result,

the

method

employed

for

transmission

the

rotation

both

reel

bases

has

been

changed

from

the

reel

motor

used

for

models

(VHR-1100,

VHR-1300

and

VHR-1500

series)

the

capstan

motor.

Even

though

the

operation

for

each

mode

has

changed

from

the

reel

motor

the

capstan

motor,

the

movement

the

mechanism

fundamentally

the

same

for

models.

1-5-1.

From

STOP

mode

PLAY

mode

CPLAY)

button

pressed.

Mode

Detect

®@.

Head

Motor

100ps

PLA

Capstan

Motor:

RWO

12V

Lo.

Tape

Motor

‘aoe

Unto.

Main

brake

100ms

The

movement

the

motor

and

brakes

during

the

follow-

ing

four

operations

described

timing

chart,

and

the

explanation

omitted

here.

(1)

From

STOP

mode

PLAY

mode

(2)

From

PLAY

mode

R-SEARCH

mode

(3)

From

REC

mode

REC

PAUSE

mode

(4)

From

STOP

mode

F-FWD

(REW)

mode

(5)

From

PLAY

mode

STOP

mode

Moving

the

Leading

guide

direction.

PLAY

mode

(@!

Leo)

Rotation

PLAY

Rotation

5SV

DY,

Cie

SOS)

(Supply

reel

base

side)

~{OFF

Soft

brake

(Supply

reel

base

side)

(

;

{ON

brake

;

Main

brake

(Take-up

ree!

base

aie

ggg

Soft

brake

rc,

(Take-up

reel

base

Sid@)

ope

pes

Review

brake

;

ees

Table

1-5-1

Timing

chart

from

STOP

mode

PLAY

mode

1-5-2.

From

PLAY

mode

R-SEARCH

mode

button

pressed.

R-SEARCH

mode

Mode

Detect

—_

Head

Motor

Seen

{

Capstan

Motor

sewo;

rt—“:;Cs*s*s*~C—C—C—s—~sdrSCSCidY

#RWO

200s

RVS

PLAY

Rotation

Lo.

300

psec

R-SEARCH

Rotation

Tape

Motor

Sonsec

Main

brake

Unlo.

5.5V

(Supply

reel

base

side)

—{OFF

Soft

brake

(Supply

ree!

base

side)

(OFF

brake

—(oFF

Main

brake

(Take-up

reel

base

side)

(FF

Soft

brake

(Take-up

reel

base

side)

—{orrF

}p—-—

Review

brake

—(OFF

Table

1-5-2

Timing

chart

from

PLAY

mode

R-SEARCH

mode

1-5-3.

From

REC

mode

REC

PAUSE

mode

PAUSE/STILL)

button

pressed.

REC

PAUSE

mode

Mode

Detect

Head

Motor

Capstan

Motor

+Fwol

Short

REV

{RWD

12V

tot

' 1

PLAY

Rotation

tol

! i

an)

[7]

sec

mate

Tape

Motor

¢}

9°

=5.5V

5Opsec

-5.5V

Main

brake

(Supply

reel

base

side)

—{oFF

Gree

(Supply

reel

base

side)

—{OFF

brake

(FF

Main

brake

(Take-up

reel

base

side)

—{OFF

Soft

brake

(Take-up

reel

base

side)

evant

AREF

Table

1-5-3

Timing

chart

from

REC

mode

REC

PAUSE

mode

—38—

1-5-4.

From

STOP

mode

F-FWD

mode

(See

Fig.

1-5-1,

Table

1-5-4)

When

the

button

pressed

during

the

STOP

mode,

the

mode

changes

the

F-FWD

mode.

The

movement

the

main

gear

this

time

described

below.

result

the

movement

the

sub

slide

Fig.

1-5-1

the

direction

arrow

G),

the

lever

caused

(by

the

hook

the

sub

slide)

move

the

direction

sub

slide

Direct

lever

moved

the

perpendicular

direction

Review

gear

button

pressed.

Mode

Detect

chs

Head

Motor

Capstan

Motor

Tape

Motor

Main

brake

Soft

brake

Direct

Lever

F-FWD

(REW)mode

The

spring

located

between

the

lever

and

the

direct

lever

thus

caused

pulled,

causing

the

direct

lever

moved

the

perpendicular

direction,

with

the

result

that

the

main

gear

driven

directly.

the

same

time,

the

review

gear

caused

move

away

from

the

main

gear,

with

the

result

that

the

main

gear

rotates

high

speed.

F-F

Lever

Q+—

Sub

slide

Main

slip

gear

STOP

mode

psec

(Supply

reel

base

side)

—(OFF

)

(OFF

brake

Main

brake

(Take-up

reel

base

side)

Soft

brake

(Take-up

reel

base

side)

—{orF

)

}-—

Review

brake

——{

OFF

aaa

Table

1-5-4

Timing

chart

from

STOP

mode

F-FWD

(REW)

mode

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