JVC HR-A630MS User manual

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GENERALES

epi

ala)

ais

_

SPECIFICATIONS

7he

specitication

shown

per

Alimentation

:

CA

220

-

240

V~,

50/60

Hz

Consommation

:24W

Températures

—

:

5°C

a

40°C

(Fonctionnement)

ie

-20°C

&

60°C

(Stockage)

Position

de

“fonctionnement

:

Seulement

horizontale

‘Dimensions

(LxHxP)

:

400

x.94

x

340

mm

Poids

2

4,3

kg

Format

:

Standard

VHS

PAL/SECAM

Largeur

de

bande

:

12,65

mm

Vitesse

de

bande

(VN)

:

23,39

mm/s

(LD)

2.11,70

mm/s.

Durée

maximale

-d'enregistrement

(VN)

:

240

mn

avec

une

cassette

vidéo

E-240

(LD)

:

480

mn

avec

une

cassette

:

vidéo

E-240

VIDEO/AUDIO

Systéme

de

signal

:

Signaux

couleur

PAUSECAM

et

monochromes

CCIR,

625

=

lignes/50

trames

Me

es

Systéme

d'enregistrement

:

Systéme

&

deux

fois

deux

:

tates

rotatives,

balayage

:

hélicoidal

avec

combinaison

-

Pores

de

tétes

vidéo

DA4

Entrée

:

0,5

42,0

Vcc,

75

ohms,

asymétrique

Sortie

+

¥4,0.Vec,

75

ohms,”

: . ;

asymétrique

Rapport

signal/bruit

:45.dB

rs

Résolution

hérizon'

240.fignes

-

Gamme

de

fréquence;

70

Hz:8.10.000

Hz

2

I

(audio-normal)

a

7

8.

20

Hz

a

20.000

Hz

Bo

oe

taudio

Hi-Fi)

Entrée/sortie

©

mr

Pet

21.

be

(ENTREE/SORTIE

x

1;

ENTREE/DECODEUR

x

1)

Connecteurs

RCA

°

(ENFREE.

VIDEO

x

1;

ENTREE

AUDIO

x

1;

SORTIE

AUDIO

x

1)

SYNTONISEUR.

Systeme

de

syntonisat

ynténiseur

a

synthése

de

;

aha

“s8

fréquence

Capacité

de

canaux

TV...

::99

positions

—

;

:

go

Ss

ition

AUX

*AU")

Canaux

couverts

_MINUTERIE

1e2ye

iF

Référence

de

I‘horloge

Capacité

de

programmation

Durée

de

soutien

mémoire

ACCESSOIRES

i

Accessoires

fournis

ain

specifically

to

the

model

HR-J636MS)

:

Par

quartz

:

Minuterie

sur

1

an/8

programmes

>

60

mn

:

Cable

d'antenne,

Boitier

de

télécommande

a

infrarouge,

Pile

"R6"

x2,

.

Cable

péritélévision,

Adaptateur

antenne

Présentation

et

caractéristiques

modifiables

sans

préavis.

COPYRIGHT

©

1996

VICTOR

COMPANY

OF

JAPAN,

LTD.

No.

82555

July

1996

TABLE

OF

CONTENTS

Section

Title

Page

important

Satety

Precautions

INSTRUCTIONS

1,

DISASSEMBLY

1.1

DISASSEMBLY

FLOW

CHART

...

1.2

HOW

TO

READ

THE

DISASSEM

AND

ASSEMBLY

....

1.3

DISASSEMBLY/ASSEMBLY

METHOD

.....

1.4

CASSETTE

HOUSING

INSTALLATION

1.5

SERVICE

POSITION

oo.

~

1.5.1

How

to

take

out

the

Mechanism

and

Main

board

assembiies

.....

1.5.2

Cautions

on

cassette

loading

when

mechanism

is

In

service

position

...

1.5.3

Cassette

loading

and

ejecting

procedures

when

mechanism

is

in

service

position

.

1.5.4

Opening

on

the

chassis

........

1.6

MECHANISM

SEAVICE

MODE

1.6.1

How

to

set

the

“MECHANISM

SERVICE

MODE”

1.7

EMERGENCY

DISPLAY

FUNCTION

.

1.7.1

How

to

display

record

of

an

emergency

1.7.2

Detail

of

emergency

faults

«......

1.7.3

How

to

clear

emergency

record

2.

MECHANISM

ADJUSTMENT

2.1

PREPARATION

...

2.1.1

Precautions

....

2.1.2

Check

without

cassette

housing

assembly

2.1.3

Manual!

removal

of

loaded

tape

2.1.4

Test

Equipment

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

2.2

MAIN

MECHANISM

PARTS

.

2.2.1

Cleaning

...

2.2.2

Lubrication

...

2.3

INSPECTION

ANI

i

2.3.1

Suggested

servicing

schedule

for

main

components

.....

2.4

DISASSEMBLY/ASSEMBLY

PROCEOURE

OF

MECHANISM

...

2.4.1

Precaution

before

disassembling

mechanism

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

2.4.2

How

to

set

the

exclusive

mechanism

operation

mode

(MECHANISM

ASSEMBLING

MODE)

..

2.5

MAIN

PARTS

REPLACEMENT

OF

MECH

2.5.1

Pinchi

Roller

Arm

Assembly

.

2.5.2

AC

Head

..

2.5.3

Pinch

plate

2.5.4

Mode

Motor

.

2.5.5

Lever

Assembly,Sub

Deck

Assembly,Capstan

Motor

2.5.6

Control

Bracket-1

...

2.5.7

Reel

Bracket,

Slit

Disk

(take-up)

.

2.5.8

Control

Bracket-2,Control

Plate

..

2.5.9

Sub

Brake

(take-up),Control

Cam

..

2.5.10

Slide

Plate

oo...

eens

2.5.11

Change

Lever,Rotary

Encoder

.

aca

ed)

wk

sea

daca

a

ooooayuuaa

PVRVYYEVERPD

PhESWOWNN

HH

—

VAYNNYHY

HNN

N

HNN

ODANNNODOHHSSSE

2.5.12

Sub

Brake

(supply),

Tension

Band

Assembly,

Tension

Ari

Assembly,

Take-up

Lever

Assembly,

Slit

Disk

(supply)

2.5.13

Take

-up

Head,

Tension

Arm

Lever

2.5.14

Guide

Rail

........

2.5.15

Stator

Assembly

..

2.5.16

Rotor

Assembly

...

2.5.17

Upper

Orum

Assembly

2.6

CHECKUP

AND

ADJUSTMENT

OF

MECHANISM

PHASE

.

2.6.1

Precaution

2.6.2

Loading

Arm

Assembly(supply,take-up)

..

2.6.3

Rotary

Encoder,Change

Lever,Contro!

Cam

..

2.6.4

Slide

plate

...

2.6.5

Control

Plate

..

2.7

TAPE

INTERCHANGEABILITY

ADJUSTMENT

.

2.7.1

Tape

pattern...

2.7.2

AIC

head

height

&

azimuth

.

2.7.3

A/C

head

phase

(X-vaiue)

2.7.4

LP

mode

auto

tracking

.

2.7.5

Tension

pole

position

2.7.6

Take-up

torque

......

3.ELECTRICAL

ADJUSTMENT

3.1

PRECAUTION

3.1.1

Required

test

equipment

.

eee

ee

et

wOOo

NNOOU

AA

WWONNN~OOO

PPVPVVVY

EYP

YY

VYYYND

we

31

P|

Section

Title

3.4.2

Required

adju:

Bie)

cin

ee

3.2

SEAVO

CIRCUIT

.

3.2.1

PB

switching

poi

3.2.2

Siow

tracking

preset

3.3

VIOEO

CIRCUIT

...

3.3.1

AUTO

Picture

...

3.4

SYSCON

CIRCUIT

..

3.4.1

Timer

clock

.......

3.5

TUNER

CIRCUIT

.

3.5.1

RF

VCO

.....

3.5.2

SIF

VCO

3.5.3

RF

AGC

.....

3.5.4

33.4MHz

TRAP

3.5.5

40.4MHz

TRAP

....

3.6

DEMODULATOR

CIRCUIT

...

3.6.1

STEREO

SEPARATION

....

4.

CHARTS

AND

DIAGRAMS

SCHEMATIC

DIAGRAM

NOTES

.

CIRCUIT

BOARD

NOTES

........

4.1

BOARD

INTERCONNECTIONS

4.2

SYSTEM

CONTROL

BLOCK

DIAG

4.3

VIDEO

BLOCK

DIAGRAM

.

4.4

AUDIO

BLOCK

DIAGRAM

.

4.5

VIDEO

AND

AUDIO

SCHEMATIC

DIAGRAM

4.8

SYSTEM

CONTROL

SCHEMATIC

DIAGRAM

.

4.7

SWITCHING

REGULATOR

SCHEMATIC

DIAGRAM.......

4.8

TUNER

SCHEMATIC

DIAGRAM

.

4.9

SERVO

SCHEMATIC

DIAGRAM

4.10

ON

SCREEN

SCHEMATIC

DIAGRAM(or

HA-J636MS)

..

4.11

TERMINAL

(MAIN)

SCHEMATIC

DIAGRAM.

4.12

PRE/REC

SCHEMATIC

DIAGRAM

4.13

FMA

SCHEMATIC

OIADRAM

.......,

4.14

MAIN

AND

A/C

HEAD

CIRCUIT

BOARDS

..

4.15

TERMINAL

SCHEMATIC

DIAGRAM.

4.16

TERMINAL

CIRCUIT

BOARD

.

4.17

IF

SCHEMATIC

DIAGRAM

.

4.18

IF

CIRCUIT

BOAAD........

4.19

DEMODULATOR

SCHEMATIC

DIAGRAM

.

4.20

DEMODULATOR

CIRCUIT

BOARD

.....

4.21

SW/DISPLAY,SW/JACK,REC

SAFETY

AN

SCHEMATIC

DIAGRAMS

(for

HR-J636MS)

4.22

SWIDISPLAY,SWIUACK.REC

SAFETY

AND

CASSETTE

SW

CIRCUIT

BOARD

(for

HR-J6Q6MS)

.....-.ceceseseeesieseneee

4247

4.23

DISPLAY,

SW/JACK,REC

SAFETY

AND

CASSETTE

SW

SCHEMATIC

DIAGRAMS

(for

HR-A63OMS/MS(C))

..........

4-49

4.24

DISPLAY,

SWIJACK.REC

SAFETY

AND

CASSETTE

SW

CIRCUIT

BOARDS

(for

HR-A6SOMS/MS(C)}

4.25

PDC

SCHEMATIC

DIAGRAM

4.26

POC

CIACUIT

BOAAD

...........

4.27

FOP

GRID

ASSIGNMENT

AND

ANODE

CONNECTION

..

4.28

REMOTE

CONTROL

SCHEMATIC

DIAGRAM

.....

5.

PARTS

LIST

5.1

PACKING

AND

ACCESSORY

<M1>

5.2

CABINET

AND

CHASSIS

ASSEMBLY

<M2>

..

5.3

MECHANISM

ASSEMBLY

<M4>

5.4

ELECTRICAL

PARTS

LIST

.....

MAIN

BOARD

ASSEMBLY

<03>

..

TERMINAL

BOARD

ASSEMBLY

<06>

IF

BOARD

ASSEMBLY

<07>

........escceees

~

15

AUDIO/CONTROL

HEAD

ASSEMBLY

<t2>

.

5-16

OEMOD

SOARD

ASSEMBLY

<14>

.....

5-16

DISPLAY

BOARD

ASSEMBLY

<28>

...

5-17

REC

SAFETY

BOARD

ASSEMBLY

«32>

CASSETTE

SWITCH

BOARD

ASSEMBLY

<33>.

SW/JACK

BOARD

ASSEMBLY

<36>

..

POC

BOARD

ASSEMBLY

<70>

6

TECHNICAL

INFORMATION

6.1

SYSCON

CIRCUIT

ooo

seescsssseeetnsssssseneecenmasensee

6-1

The

feltoming

labie

trate

Ine

ditfersng

oonis

between

Wodels

(HR-AG1OMS

WR-AGJOWS

(C)_

ang

A-JEIENS!

8

tha

series

a

a

ST

PICTURE

fest

Important

Safety

Precautions

Prior

to

shipment

from

the

factory,

JVC

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.

Locations

requiring

special

caution

are

denoted

by

labels

and

inscriptions

on

the

cabinet,

chassis

and

certain

parts

of

the

product.

When

performing

service.

be

sure

to

read

and

comply

with

these

and

other

cautionary

notices

appearing

in

the

opera-

ON

and

service

manuals

2.

Parts

identified

by

the

A

symbol

and

shaded

(

)

parts

are

critical

for

safety

Replace

only

with

specified

part

numbers

Note:

Parts

in

this

category

also

include

those

specified

to

comply

with

X-ray

emission

standards

for

products

using

cathode

ray

tubes

and

those

specified

for

compliance

with

vanous

regulations

regarding

spurious

radiation

emission,

3.

Fuse

replacement

caution

notice

Caution

for

continued

protection

against

fire

hazard.

Replace

only

with

same

type

and

rated

fuse(s)

as

specified.

.

Use

specified

internal

wiring.

Note

especially:

1)

Wires

covered

with

PVC

tubing

2)

Double

insulated

wires

3)

High

voltage

leads

5.

Use

specified

insulating

materials

for

hazardous

live

parts.

Note

especially:

1}

Insulation

Tape

3)

Spacers

5)

Barrier

2}

PVC

tubing

4)

Insulation

sheets

for

transistors

6.

When

replacing

AC

primary

side

components

(transformers,

power

cords,

noise

blocking

capacitors,

etc.)

wrap

ends

of

wires

securely

about

the

terminals

before

soldering

“its

bo

h*

7,

Observe

that

wires

do

not

contact

heat

producing

parts

(heat-

sinks,

oxide

Metal

film

resistors,

fusible

resistors,

etc.)

8.

Check

that

replaced

wires

do

not

contact

sharp

edged

or

pointed

parts

9.

When

a

power

cord

has

been

replaced,

check

that

10-15

kg

of

force

in

any

direction

will

not

loosen

it.

Power

cord

Fig.

2

.

Also

check

areas

surrounding

repaired

locations

.

Products

using

cathode

ray

tubes

(CRTs)

In

regard

to

such

products,

the

cathode

ray

tubes

themselves,

the

high

voltage

circuits,

and

related

circuits

are

specified

for

compliance

with

recognized

codes

pertaining

to

X-ray

emission.

Consequently,

when

servicing

these

products,

replace

the

cath-

ode

ray

tubes

and

other

parts

with

only

the

specified

parts.

Under

no

circumstances

attempt

to

modify

these

circuits.

Unauthorized

modification

can

increase

the

high

voltage

value

and

cause

X-ray

emission

trom

the

cathode

ray

tube.

to

prevent

safety

hazards,

according

to

the

following

steps

12.

Crimp

type

wire

connector

In

such

cases

as

when

replacing

the

power

transformer

in

sets

where

the

connections

between

the

power

cord

and

power

wansformer

primary

lead

wires

are

performed

using

crimp

type

connectors,

if

repiacing

the

connectors

is

unavoidable,

in

order

perform

carefully

and

precisely

1)

Connector

part

number

:

£03830-001

2)

Required

tool

.

Connector

crimping

tool

of

the

proper

type

which

will

not

damage

insulated

parts

3)

Replacement

procedure

(1)

Remove

the

old

connector

by

cutting

the

wires

at

8

point

close

to

the

connector

Important

:

Do

not

reuse

a

cOnnector

(discard

it).

524

\lz

S

ho.

10

connector

Fig.

3

(2)

Strip

about

15

mm

of

the

insulation

from

the

ends

of

the

wires.

tf

the

wires

are

stranded,

twist

the

strands

to

avoid

frayed

conductors.

15

mm

2

Fig.

4

(3)

Align

the

lengths

of

the

wires

to

be

connected.

Insert

the

wires

fully

into

the

connector

Metal

sleeve

Connector

Fig.S

(4)

As

shown

in

Fig.

6,

use

the

crimping

tool

to

crimp

the

metal

Sleeve

at

the

center

position.

Be

sure

to

crimp

fully

to

the

complete

closure

of

the

tool.

eS

hey

Cr

20

3

Fig.

6

(5)

Check

the

four

points

noted

in

Not

easily

pulled

free

Wire

insulation

recessed

more

than

4

mm

Fig.

7

imping

tool

Fig.

7.

Crimped

at

approx.

center

of

metal

sleeve

Conductors

extended

SECTION

1

DISASSEMBLY

1.4

DISASSEMBLY

FLOW

CHART

This

flowchart

lists

shows

the

disassembly

steps

for

the

cabinet

parts

and

P.C.

boards

in

order

to

gain

access

to

item(s)

to

be

serviced.

When

reassembling.

perform

the

step(s)

in

reverse

order.

Bend,route

and

dress

the

flat

cables

as

they

were

originally.

@

Top

cover

¢

Bottom

cover

[=

28

J

[Front

panel

assembly

7

©

©

®

SW/JACK

&

SW/DISPLAY

board

assemblies]

1.3

DISASSEMBLY/ASSEMBLY

METHOD

PART

NAME

TOP

COVER

5(St)

—}-

@

|

BOTTOM

COVER

O2

|

(S2},

7(L1}

©)

FRONT

PANEL

ASSEMBLY|

D3

|

7121,

°JOG/SHUTTLE

[NOTE1>

(J636MS)

eeeremeees

bec

ao

SW/JACK

&

SW/DISPLAY|

D4

1

12(L3),°CN1201

|<NOTE2>

BOARD

ASSEMBLIES

i

*CN1204

©)

|

CASSETTE

HOUSING

|

D5

|

2(S3)

,2(S4)

ASSEMBLY

Cassette

housing

assembly

|

ey

Shield

case

©

©

®@

DRUM

assembly

>)

Main

deck

assembly

@

1.2

HOW

TO

READ

THE

DISASSEMBLY

AND

ASSEMBLY

Main

board

assembly

PART

NAME

TOP

COVER

BOTTOM

COVER

{$2),

7{L1)

1

FRONT

PANEL

ASSEMBLY

|

D3

}

7(L2),*JOG/SHUTTLE

|

<NOTE

1>

(J636MS)

+

+

+

SW/JACK

&

SW/DISPLAY

|

D4

|

12(L3),°CN1201,

|

<NOTE

2>

®

®

®

BOARD

ASSEMBLIES

*CN1204

®

©

+

CASSETTE

HOUSING

|

DS

j

2(S3),2(S4)

ASSEMBLY

;

4

am

SHIELD

CASE

D6

}

2(S5),*CN1

a

(1)

(2)

{3}

(4)

(5)

(1)

Order

of

steps

in

Procedure

When

reassembling,

perform

the

step(s)

in

the

reverse

order.

These

numbers

are

also

used

as

the

identification

(location)

NO.

of

parts

Figures.

(2)

Part

name

to

be

removed

or

installed.

(3)

Fig.No.

showing

procedure

or

part

location

(4)

Indentification

of

part

to

be

removed,

unhooked,

unlocked,

released,

unpluged,unclamped

or

unsoldered.

P

=

Spring,

W

=

Washer,

S

=

Screw,

L

=

Locking

tab,

*

=

Unhook,unlock,

release,

unplug

or

unsolder.

(5)

Adjustment

information

for

installation

+—

SHIELD

CASE

06

+—

DRUM

ASSEMBLY

D7

|

3(S6),WRI,

MAIN

DECK

ASSEMBLY

|

D8

|

2(S7),.WR2

WR3,2(L4),°CN703

OI

MAIN

BOARD

ASSEMBLY

|

D9

|

2(S8)

<NOTE1>

When

reattaching

the

front

panel

assembly,

make

sure

that

the

door

opener

(@)

of

the

cassette

housing

assembly

is

low-

ered

in

position

prior

to

the

reinstallation.

<NOTE2>

When

plugging

the

connector

in,

check

that

the

flat

wire

is

inserted

properly

and

fully.

<NOTE3>

When

reattaching

the

cassette

housing

assembly,

pay

careful

attention

to

the

switch

lever

not

to

make

it

touch

the

REC

switch

knob

of

the

REC

SAFETY

board

assembly

from

the

upside.

;

(If

the

REC

switch

knob

of

the

REC

SAFETY

board

assembly

is

damaged,

cassette

loading

is

impossible.)

<NOTE4>

When

plugging

the

connector

in,

check

that

the

flat

wire

is

inserted

properly

and

fully.

<NOTE5>

*

When

removing

the

Main

deck

assembly

only,

unhook

the

two

spacers

connecting

it

with

the

Main

board

assembly

with

pliers

from

the

back

side

of

the

Main

board

assembly

first,

and

then

remove

the

Main

deck

assembly.

«

When

reattaching

the

Main

deck

assembly

to

the

Main

board

assembly,

make

sure

to

set

the

spacers

into

the

retaining

slots

respectively.

11

tt

<A

ROLE

LC

CE

LICE

LCC

ACCC

LO

AL

CT

LL

AE

ETT

RT

DT

TR

TT

Fig.

01

THE

FRONT

SIDE

FOIL

SIDE

Fig.

D3

(S3)

THE

FRONT

SIDE

FOWL

SIDE

Fig.

D7

Fig.

D2

Fig.

D4

Fig.

D8

Fig.

D9

1.4

CASSETTE

HOUSING

INSTALLATION

NOTE:

Observe

the

mechanical

phase

and

position

(see

figure)

when

installing

the

cassette

hous-

ing

assembly.

If

these

are

incorrect,

the

system

will

not

operate

properly

even

when

tape

is

inserted.

1.

Check

that

the

hole

of

the

control

cam

are

aligned

to

the

deck

hole.

!f

necessary,

turn

the

loading

motor

belt

by

hand

to

adjust

the

position.

Loading

Motor

Belt

Pinch

Plate

Hole

align

with

hole

in

deck

14

1.5

SERVICE

POSITION

1.5.1

How

to

take

out

the

Mechanism

and

Main

board

assemblies.

(1)

Remove

the

Top

cover,

Front

panei

assembly,

CN1201

and

CN1204

of

the

SW/DISPLAY

and

SW/JACK

board

assemblies.

(2)

Take

out

4

screws

@>.

2

screws

(@

and

1

screw

(C)

as

shown

in

Fig.1-5-17.

|

CN1204

Sg

mn

Fig.

1-5-1

(3)

Remove

the

Mechanism

assembly

(including

Cassette

housing)

and

Main

board

assembly

out

of

the

chassis

as

shown

in

Fig.

1-5-2.

(5)

Turn

over

the

Mechanism

assembly

and

Main

board

assembly

then

connect

CN1201and

CN1204

of

the

SW/

DISPLAY

and

SW/JACK

board

assemblies.

(8)

Carry

out

checke

&

rapaire

as

nocessary

at

shown

in

Fig.1-5-3.

Note:

When

input

the

AUDIO/VIDEO

signal

from

connector,

connect

CN1204

of

the

SW/JACK

board

assembly.

(HR-J636MS

only)

SW/JACK

board

assembly

REC

SAFETY

board

assembly

CASSETTE

SWITCH

board

assembly

SW/DISPLAY

board

assembly

Fig.

1-5-3

1.5.2

Cautions

on

cassette

loading

when

mechanism

is

in

service

position

The

REC

SAFETY

board

assembly

of

this

set

serves

both

for

detecting

the

safety

tab

(erasure

prevention

tab)

of

a

cas-

sette

and

detecting

a

cassette

loaded.

Therefore,

cassette

loading

in

the

condition

that

the

mechanism

is

disassembled

from

the

set

needs

manual

operation

of

the

switches

of

the

REC

SAFETY

board

assembly

and

the

CASSETTE

SWITCH

board

assembly.

1.5.3

Cassette

loading

and

ejecting

procedures

when

mechanism

is

in

service

position

(1)

Insert

a

cassette

tape

halfway

into

the

cassette

housing

assembly.

(2)

Press

the

switch

of

the

REC

SAFETY

board

assembly

to

turn

on.

(3)

When

the

cassette

loading

begins

and

the

cassette

goes

down

to

the

bottom,

immediately

press

the

switch

of

the

REC

SAFETY

board

assembly

to

turn

off

and

hold

the

sta-

tus

that

the

switch

of

the

CASSETTE

SWITCH

board

as-

sembly

is

turned

on.

(Fix

the

switch

with

adhesive

tape

or

put

a

screwdriver,

etc.

on

it

to

leave

the

switch

in

the

ON

status.)

(4)

In

this

status,

desired

operations

(recording,

playback,

fast

forward,

rewind,

etc.)

can

be

performed.

Note:

When

the

mechanism

is

in

the

service

position,

the

safaty

tab

of

cassette

tape

is

not

detected

and

record-

ing

on

cassette

tapes

without

safety

tab

is

possibie.

Therefore,

carefully

choose

a

cassette

tape

for

op-

eration

in

this

mode

so

as

to

avoid

using

cassette

tapes

of

important

recording.

(5)

For

ejecting

the

cassette

in

this

status,

do

it

in

the

reverse

order

of

cassette

loading

mentioned

above.

Note:

/f

the

manual

operation

REC

SAFETY

switch

timing

is

incorrect,

the

cassette

may

be

completely

or

par-

tially

ejected,

and

the

cassette

is

often

ejected

incom-

pletely.

in

such

a

case,

it

is

possible

to

take

out

the

cassette

by

hand.

If it

is

desired

to

load

a

cassette

again

after

the

cassette

is

ejected

in

the

above

procedure,

make

sure

to

set

the

tray

of

the

cassette

housing

assembly

in

the

frontmost

position

prior

to

loading

the

cassette

once

again.

1-5

1.5.4

Opening

on

the

chassis.

The

chassis

assembly

has

openings

for

easy

access

to

the

checkpoints

and

connector

pins

as

shown

in

Fig.1-5-4.

peceee

Fig.

1-5-4

Rotary

Encoder

,

SPACER

@

TP1101

CTL

P.

TP333

A.ERASE

TP334

F.ERASE

1.6

MECHANISM

SERVICE

MODE

This

medel

has

2

unique

function

tw

enter

the

meshenism

into

every

operation

mode

without

loading

of

any

cassette

tape.

This

function

is

called

the

"MECHANISM

SERVICE

MODE".

1.6.1

How

to

set

the

"MECHANISM

SERVICE

MODE"

(1)

Disconnect

VCR

from

AC.

{2)

Remove

the

Top

cover,

Front

panel

assembly

and

cassette

housing

assembly.

(See

Page

1-2,

1-3)

(3)

Connect

TP1202

(GND)

and

TP1201

(TEST)

on

the

SW/

DISPLAY

beard

assembly

with

9

jume

wire

(4)

Connect

VCR

to

AC.

(5)

Press

the

POWER

button.

(6)

Select

the

desired

operation

modes

with

the

operation

buttons

or

remote

controller.

TERMINAL

board

assembly

sal

TP334

F.

ERASE

IF

board

mii

DEMOD

board

assembly

PDC

board

assembly

|

an)

SW/

JACK

board

assembly

c

REC

SAFETY

board

assembly

TEST

SW/DISPLAY

board

assembly

CASSETTE

SW

board

assembly

Fig.

1-6-1

1-7

1.7

EMERGENCY

DISPLAY

FUNCTION

This

product

has the

function

to

store

the

last

two

previous

emergency

faults

which

can

be

displayed

in

the

FDP

when

servicing.

1.7.1

How

to

display

record

of

an

emergency

faults

(1)

Press

"N"

button

of

the

presetting

unit

more

than

2

seconds.

and

the

two

previous

emergency

faults

are

shown

in

the

FDP.

(2)

Press

"N°

button

of

the

presetting

unit

again

when

return

the

norma!

mode.

[Example]

E:01:03

a

Emergency

faults

before

last

Emergency

faults

of

the

last

time

Example}

E:——:—-—

+No

record

of

emergency

1.7.2

Detail

of

emergency

faults

1.7.3

How

to

clear

emergency

record

Press

the

COUNTER

RESET

button

on

the

remote

contro+

ler

in

the

emergency

record

display

mode,and

the

record

of

the

emergency

fauit(s)

is

cleared.

without

shift

to

next

mode.

TU

REEL

FG

input

is

absentifor

more

than

4

Sec)

DRUM

FF

input

is

absentifor

more

than

3

Sec)

[i

ed

FDP

Symptom

Detect

mode

Resulting

mode

+

£:01

|

Loading

motor

rotates

for

more

than

8

Sec

Loading

POWER

OFF

;

without

shift

to

next

mode.

+

4-

i

E:02

Loading

motor

rotates

for

more

than

8

Sec

Unloading

POWER

OFF

REC/PLAY/FF/REW

SEARCH

FF/SEARCH

REW

STOP

-»

POWER

OFF

REC/PLAY/FF/REW

SEARCH

FF/SEARCH

REW

E£:06

CAPSTAN

FG

input

is

absentifor

more

than

1

Sec)|}

REC/PLAY/FF/REW

STOP

—-

POWER

OFF

mi

SEARCH

FF/SEARCH

REW

st

E.07

No

SWD5V/12V

POWER

ON

POWER

OFF

ee

Table

1-7-1

EMERGENCY

FAULTS

SECTION

2

MECHANISM

ADJUSTMENT

2.1

PREPARATION

2.1.1

Precautions

{1}

Disconnect

VCR

from

AC

power

before

soldering.

(2)

Avoid

imparting

stress

to

wires

when

disengaging

con-

nectors.

(3)

Determine

and

correct

the

cause

of

difficulty

before

pro-

ceeding

to

adjustments.Do

not

disturb

settings

unnecessarily.

(4)

Use

care

not

to

damage

tabs,claws,etc

during

repairs.

(5)

Install

the

cassette

housing

assembly

only

when

the

mechanism

is

in

the

MECHANISM

ASSEMBLING

MODE

position.

(6)

When

installing

the

Front

panel

assembly,be

sure

to

engage

the

housing

door

with

the

door

opener

of

the

cassette

housing

assembly.

If

this

is

omitted,the

cassette

door

will

not

open

at

Eject

and

the

cassette

can

not

be

removed.

(See

SECTION

1

DISASSEMBLY.)

2.1.2

Check

without

cassette

housing

assembly.

Mechanism

operations

can

be

observed

easily

by

removing

the

cassette

housing

assembly.

Use

the

MECHANISM

SERVICE

MODE.

(See

SECTION

1

DISASSEMBLY.

)

2.1.3

Manual

removal

of

loaded

tape

When

the

deck

enters

the

emergency

mode

with

cassette

tape

loaded

and

it

can

not

be

ejected

by

pressing

the

EJECT

button,

take

out

of

the

cassette

tape

according

to

the

follow-

ing

procedure.

(1)

Disconnect

the

power

cord

from

AC

outlet

then

take

out

the

Top

cover

and

Front

panel

assembly.

(2)

Turn

the

loading

motor

on

the

Main

deck

assembly

by

hand

in

the

unloading

direction

to

where

the

pole

base

assembly

(supply

and

take-up)

is

positioned

below

the

cassette

tape.At

that

time,

pay

careful

attention

to

the

tape

not

to

get

soiled

with

grease.

(3)

Take

out

4

screws

of

the

cassette

housing

assembly.(See

SECTION

1

DISASSEMBLY.

}

(4)

Remove

the

cassette

housing

with

slackened

tape

and

guard

panel

of

cassette.

(5)

Wind

up

the

tape

by

turning

the

reel

hub(either

supply

or

take-up

side

for

convenience)

from

the

bottom

of

the

cassette,and

remove

the

cassette

tape.

Loading

Motor

Pole

Base

Assembly

-

Guide.

Arm

Assembly

Fig.

2-1-1

2-1

fo

ea

tn

mea

SNR

eA

AA

A

eA

2.1.4

Test

Equipment

Ee

Alignment

tape

(LP)

Back

tension

cassette

gauge

AC

head

positioning

tool

MHPE-L

PUJ48076-2

PTU94010

a

Algnment

tape

(SP}

MHPE

PTU94002

PTU94008

KYODO-SH-P

AO

|

—

Roller

driver

i

Presetting

unit

Grease

r

Table

2-1-1

Test

equipment

2.2

MAIN

MECHANISM

PARTS

Drum

Assembly

A/C

Head

Stator

Assembly

Capstan

Motor

Loading

Motor

Guide

Rail

FE

Head

YY

at

i

—

Belt

(Loading

Motor)

40

;

f

Pinch

Roller

Arm

Assembly

Guide

Arm

Assembly

C}-Lever

Assembly

Control

Plate

Control

Cam

s-

Change

Lever

Assembly

|

Ek

pa

AS

|e

ee

Tension

Band

Assembly

Se

Slide

Piate

Slit

Disk

Pole

Base

Assembly

Slit

Disk

(SUP)

(TU)

(TU)

Fig.

2-2-1

Top

view

of

main

deck

2-2

(a

EEE

i,

(CGleoa

10)

aay

Belt

(Capstan}

Fig.

2-2-2

Bottom

view

of

main

deck

2.2.1

Cleaning

Periodic

cleaning

of

the

tape

transport

system

is

desirable,

but

usually

not

feasible

in

practice.

Therefore,perform

cleaning

when

a

set

is

brought

in

for

repairs

or

maintenance.

Con-

tamination

of

the

video

heads,tape

guides

and

brush

can

detract

from

playback

picture

quality

and

in

extreme

cases,even

damage

the

tape.For

cleaning,use

a

finemesh

cotton

clothiabout

the

texture

of

a

white

dress-shirt)

mois-

tened

in

alcohol.

It

is

recommended

to

also

clean

thetape

tension

posts

and

capstan.

*

To

clean

the

video

heads,

press

the

moistened

cloth

gently

against

the

upper

drum

with

fingertip

and

turn

the

drum

by

hand.

¢

Do

not

use

a

vertical

stroke,as

this

may

damage

the

heads.

2.2.2

Lubrication

Oil

and

grease

do

not

normally

require

periodic

replenishing.

Apply

only

when

replacing

lubricated

partslaiso

clean

and

replace

lubrication

of

mating

parts

if

soiled).

For

parts

and

points

to

apply

oil

and

grease,

refer

to

the

exploded

views

of

the

mechanism

assembly.

Before

oiling,clean

with

alcohol.

Apply

one

or

two

drops

of

oil.

Avoid

excess

oil.

1.

Table

2-2-1

indicates

the

oil

and

grease

used

in

this

set.

Use

these

or

recommended

locally

available

equivalents.

Oil

COSMO-HV56

Grease

KYODO-SH-P

Table

2-2-1

2.

Grease

is

not

required

for

a

replacement

cassette

hous-

ing

assembly,as

this

has

been

applied

at

the

factory.

NOTE:

Stir

grease

that

has

been

stored

for

an

extended

period.

2:3

2.3

INSPECTION

AND

MAINTENANCE

This

product

employs

rotary

and

moving

parts

which

wear

out

in

the

course

of

usage.

Periodic

inspection,

cleaning,

lu-

brication

and

maintenance

are

therefore

important

for

ensur-

ing

maximum

performance.

Worn

parts

must

aiso

be

re-

placed

as

and

when

required.

2.3.1

Suggested

servicing

schedule

for

main

components

The

following

table

indicates

the

suggested

period

for

such

service

measures

as

cleaning,lubrication

and

replacement

'n

practice,

the

indicated

periods

will

vary

widely

according

to

environmental

and

usage

conditions.

However,

the

indi-

cated

components

should

be

inspected

when

a

set

is

brought

for

service

and

the

maintenance

work

performed

if

necessary.

Also

note

that

rubber

parts

may

deform

in

ume,even

if

the

set

is

not

used.

System

t

Tape

transport

Drive

Other

Parts

Name

Operation

Hours

L

\

~1000H

|

~2000H

|

Upper

drum

assembly

KO

i

©

if

AC

head

KO

|

*O

{Lower

drum

motor

assembly

|e

KO

Pinch

roller

arm

assembly

a

|

*

Full

erase

head

|

*

x

|

Tension

arm

assembly

i

*

|

*

Guide

arm

assembly

i

o*

*

Capstan

motor

=|

O

Belt

(Capstan)

i

O

O

Belt

(Loading

motor)

O

Loading

motor

O

Slit

disk

(supply,

take-up)

O

Clutch

unit

(supply,

take-up)

O

Worm

gear

assembly

O

Control

piate

2

;

EKG

Slide

plate

|

ae.

|

Brush

assembly

7

i

AO

1

KO

Tensionbandassembly

|

OQ

|

©

Rotary

encoder

O

|

%

:

Cleaning

C;

:

Inspection

or

Replacement

if

necessary

Table

2-3-1

24

2.4

DISASSEMBLY/ASSEMBLY

PROCEDURE

OF

MECHANISM

2.4.1

Precaution

before

disassembling

mechanism

This

mechanism

has

an

exclusive

operation

modo

provided

for

disassembling

and

installation

of

the

mechanism

(MECHANISM

ASSEMBLING

MODE),

and

it

is

suggested

lo

set

the

mechanism

to

this

mode

before

disassembly

and

installation

The

exclusive

mechanism

operation

mode

is

not

generally

used

and

becomes

available

by

manuai

setting

only.

Then

this

procedure

starts

with

the

condition

that

the

cabi-

net

parts,cassette

housing

assembly

and

PRE/REC

board

assembly

have

been

removed.

2.4.2

How

to

set

the

exclusive

mechanism

operation

mode

(MECHANISM

ASSEMBLING

MODE)

(1)

Turn

the

loading

motor

belt

by

hand.

(2)

Confirm

that

the

hole

of

the

control

cam

are

aligned

to

the

deck

hole

as

shown

in

Fig.2-4-1.

Loading

Motor

Belt

oe

tl

1+

|

Hole

align

with

hole

in

deck

Control

Cam

Fig.

2-4-1

2.5

MAIN

PARTS

REPLACEMENT

OF

MECHANISM

2.5.1

Pinch

Roller

Arm

Assembly

(1)

Remove

the

slit

washer.

(2)

Tilt

up

the

pinch

roller

assembly

in

direction

of

arrow.

Slit

Washer

Pinch

Roller

Arm

Assembly

2.5.2

A/C

Head

1,

Removal

{1}

Take

out

2

screws

(A).

(2)

Remove

the

A/C

head

with

head

base.

Head

Base

(A)

Fig.2-5-2

(3)

When

replacing

the

A/C

head

only,remove

3

screws

(B),

use

Care

not

to

misplace

the

3

springs.

(B)

AIC

Head

’

Board

AIC

Head

Zo

7

s

Head

Base

ow

&

eo

SS

Fig.2-5-3

2.

‘Installation

(1)

Temporarily

set

AYC

head

height

as

indicated

in

Fig.

2-54.

A/C

Head

gus

/

Fig.2-5-4

NOTES:

*

It

is

very

important

to

correctly

adjust

the

control

pulse

and

audio

signal

in

addition

to

the

mechanical

tape

path.

*

Perform

interchangeability

adjustments

after

electrical

ad-

justments,

2.5.3

Pinch

Plate

1.

Removal

1)

Disengage

2

claws,

then

remove

the

pinch

plate.

f

Pinch

Plate

Fig.2-5-5

2.

Installation

;

(1)

When

installing

pinch

piate,align

rack

of

pinch

plate

and

triangle

mark

of

control

cam

as

indicated

in

Fig.2-5-6.

Pinch

Plate

Control

Cam

Correct

direction

L

Fig.

2-5-6

2.5.4

Loading

Motor

(1)

Disengage

the

belt

between

loading

motor

and

worm

gear.

(2)

Take

out

2

screws

(A)

then

remove

the

loading

motor.

Red

Line

(to

CN703

Fig.2-5-7

2.5.5

Lever

Assembly,Sub

Deck

Assembly,Capstan

Motor

(1)

Take

out

1

slit

washer,then

remove

the

lever

assembly.

(2)

Disengage

the

belt(

capstan

motor)

from

bottom

of

mechanism

assembly

first

as

indicated

in

Fig.2-5-10.

(3)

Take

out

3

screws

(A)

and

remove

the

sub

deck

assembly

as

indicated

in

Fig.2-5-8.

(4)

Take

out

3

screws

(B)

and

remove

the

capstan

motor

trom

the

sub

deck

assembly

as

indicated

in

Fig.2-5-9.

(A)

Stit

Washer

Lever

Assembly

Fig.2-5-8

2-6

2.5.6

Control

Bracket-1

(1)

Take

out

1

screw

{A)

and

1

screw

(8).

(2)

Remove

the

control

bracket-1.

(B)

Sub

Deck

Assembly

eA

GK

Cty}

=)

A

cl

TY

Co

Capstan

Motor

Fig.2-5-13

Fig.2-5-9

Fig.2-5-11

2.5.7

Reel

Bracket,Slit

disk

(take-up),Control

Bracket-2

2.5.8

Control

Plate

(1)

Take

out

2

slit

washers.

(1)

Take

out

1

slit

washer.

(2)

Remove

the

reel

bracket

and

slit

disk(take-up).

(2)

Disengage

2

claws

and

remove

the

contro!

plate.

(3)

Take

out

1

screw

(A)

and

remove

the

control

bracket-2.

Slit

Washer

Control

Plate

Fig.2-5-10

Fig.2-5-14

2-7