Panasonic Ag-ds850hp User manual

ORDER

NO.

VSD9605M201

Service

Manual

Panasonic

SVS

|

[li-lF

Editing

Video

Cassette

Recorder

AG-DS850HP

Editing

Video

Cassette

Player

AG-DS840HP

YP

lease

use

this

simplified

service

6

manual

with

the

service

manual

for

Model

AG-

DS850P_

Velume

1

(Order

No.

VSD9403M244),

Volume

2

(Order

No.

VSD9404M245)

and

Model

AG-DS840P

(Order

No.

VSD9411M264).

Also

please

refer

to

the

supplement

service

manual

for

AG-

DS850P

and

AG-

DSB40P.

©

1996

Matsushita

Electric

Industria!

Co.,

Ltd.

All

right)

reserved.

Unauthorized

copying

and

distribution

is

a

violation

of

hw.

Panasonic.

A

WARNING

This

service

information

is

designed

for

experienced

repair

technicians

only

and

is

not

designed

for

use

by

the

general

public.

It

does

not

contain

warnings

or

cautions

to

advice

non-technical

individuals

of

potential

dangers

in

attempting

to

service

a

product.

Products

powered

by

electricity

should

be

serviced

or

repaired

only

by

experienced

professional

technicians.

Any

attempt

to

service

or

repair

the

product

or

products

dealt

with

in

this

service

manual

by

anyone

else

could

result

in

serious

injury

or

death.

INTRODUCTION

This

Simplified

Service

Manual

describes

the

changes

from

Panasonic

S-VHS

Hi-Fi

Video

Cassette

Recorder

“Player

model

AG-DS850P“AG-DS840P

to

AG-DS850HP“AG-DS840HP.

It

contains

the

list

of

supplement

service

manuals

for

AG-DS850P/AG-DS840P

and

the

replacement

parts

lists.

Please

use

this

simplified

Service

Manual

together

with

AG-DS850P

Service

Manuals

(Order

No.

VSD9403M244

(Vol.

1),

VSD9404M245

(Vol.

2)),

AG-DS840P

Service

Manual

(Order

No.

VSD9411M254)

and

Supplement

service

manuals

listed

later.

CONTENTS

INTRODUCTION

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1

SAFETY

PRECAUTIONS

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Tee

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CST

CT

EER TEE

EO

Oe

Cee

ee

2

1.

AG-DS850P

SUPPLEMENTS

covcccccttcctctt

ttt

etter

terre

treet

nent

eee

nes

3

2.

AG-DS840P

SUPPLEMENTS

TELTTTECLCTRTLERETETE

CECE

PPP

PPR

Teer

er

eer

re

eer

re

ee

5

3.

EXPLODED

VIEWS

&

REPLACEMENT

PARTS

LISTS

«vvrrssrrsserrrrerrees

PRT-1

SAFETY

PRECAUTIONS

GENERAL

GUIDELINES

1.

When

servicing

observe

the

original

lead

dress.

!f

a

short

circuit

is

found,

replac

all

parts

which

have

been

overheated

or

damaged

by

the

short

circuit.

.

After

servicing,

see

to

it

that

all

the

protectiv

devices

such

as

insulation

barriers,

insulation

papers

shields

are

properly

installed.

.

After

servicing

make

the

following

leakage

current

checks

to

prevent

the

customer

from

being

exposed

to

shock

hazards.

LEAKAGE

CURRENT

COLD

CHECK

1

2.

TO

Unplug

the

AC

cord

and

connect

a

jumper

between

the

two

prongs

onthe

plug.

Measur

the

resistance

value,

with

an

ohm

meter,

between

the

jumpered

AC

plug

and

each

exposed

metallic

cabinet

part

on

the

equipment

such

as

screwhead

connectors,

contr

shafts,

etc.

When

the

exposed

metallic

part

has

a

return

path

to

the

chassis,

the

reading

shoulb

be

between

1IMQ

and5.2MQ.

When

the

exposed

metal

dose

not

have

a

return

path

to

the

chassis,

the

reading

must

be

©.

AC

VOLTMETER

Hot-Check

Circuit

COLD

WATER

PIPE

(EARTH

GROUND)

APPLIANCE’S

EXPOSED

METAL

PARTS

15002

10W

Figure

1

LEAKAGE

CURRENT

HOT

CHECK

(See

Figure

1)

1.

2:

Plug

the

AC

cord

directly

into

the

AC

outlet.

Do

not

use

an

isolation

transformer

for

this

check.

Connect

a

1.5K,

10W

resistor,

inparallel

with

0.15

u

F

capacitor,

between

each

exposed

metallic

part

on

the

set

an

a

good

earth

ground

such

as

a

water

pipe,

as

shown

in

Figure

1.

.

Use

an

AC

voltmeter,

with

1000

ohms/

volt

or

more

sensitivity,

to

measur

the

potential

across

the

resistor.

.

Check

each

exposed

metallic

part,

and

measure

the

voltage

at

each

point.

.

Reverse

the

AC

plug

in

the

AC

outlet

repeat

each

of

the

above

measurements.

.

The

potantial

at

any

point

should

not

exceed

0.75

volts

RMS.

A

leakage

current

tester

(Simpson

Model

229

equivalent)

may

be

used

to

make

the

hot

checks,

leakage

current

must

not

exceed

1/2

milliamp.

In

case

a

measurement

is

outside

of

the

limits

specified,

there

is

a

possiblity

of

a

shock

hazard,

and

the

equipment

should

be

repaired

and

rechecked

before

it

is

returned

to

the

customer.

ELECTROSTATICALLY

SENSITIVE(

ES)

DEVICES

Some

semiconductor

(solid

state)

devices

can

be

damaged

easily

by

static

electricity.

Such

components

commonly

are

called

Electrostatically

sensitive

(ES)

Devices.

Examples

of

typical

ES

devices

are

integrated

circuits

and

some

field-effect

transistors

and

semiconductor

“chip”

components.

The

following

techniques

should

be

used

to

help

reduce

the

incidence

of

component

damage

caused

by

static

electricity.

1.

Immediately

before

handling

any

semiconductor

component

or

semiconductor-equipped

assembly,

drain

off

any

electrostatic

charge

on

your

body

by

touching

a

known

earth

ground.

Alternatively,

obtain

and

wear

a

commercially

available

discharging

wrist

strap

device,

which

should

be

removed

for

potential

shock

reasons

prior

to

applying

power

to

the

unit

under

test.

.

After

removing

an

electrical

assembly

equipped

with

ES

devices,

place

the

assembly

on

a

conductive

surface

such

as

aluminum

foil,

to

prevent

electrostatic

charge

buildup

or

exposure

of

the

assembly.

.

Use

only

a

grounded

tip

soldering

iron

to

solder

or

unsolder

ES

devices.

.

Use

only

an

anti-static

solder

removal

device

classified

as

“anti-static”

can

generate

electrical

charges

sufficient

to

damage

ES

devices.

.

Do

not

use

freon-propelled

chemicals.

These

can

generate

electrical

charges

sufficient

to

damage

ES

devices.

.

Do

not

remove

a

replacement

ES

device

from

its

protective

package

untilimmediately

before

you

are

ready

to

instal!

it.

(most

replacement

ES

devices

are

packaged

with

leads

electrically

shorted

together

by

conductive

foam,

aluminum

foil

or

comparable

conductive

material).

.

Immediately

before

removing

the

protective

material

from

the

leads

of

replacement

ES

device,

touch

the

protective

material

to

the

chassis

or

circuit

assembly

into

which

the

device

will

be

installed.

CAUTION:

Be

sure

no

power

is

applied

to

the

chassis

or

circuit,

and

observe

all

otner

asfety

precautions.

.

Minimize

bodily

motions

when

handling

unpackaged

replacement

ES

devoces.

(Otherwise

harmless

mother

such

as

the

brushing

together

of

your

clothes

fabric

or

the

lifting

of

your

foor

from

a

carpeted

floor

can

generate

static

electricity

sufficient

to

damage

an

ES

device).

1.

AG-DS850P

SUPPLEMENTS

Bulletin

.

Effective

No

Sub

ject

from

VSD9410S8250

Correction

of

Service

Manual

VSD9410S251

|

2

Change

of

Parts

Number

a

VSD94108251

3

Change

of

EP-ROM(Ver

Up)

DAT...

VSD9410S8251

4

Change

of

Parts

List

DAT...

VSD94108251

5

Change

of

Screw

DAT...

VSD94108251

6

Change

of

Parts

Number

E4T...

VSD9410S251/

7

Improvement

of

Temp.

Chara.

&

H.Noise

on

Chroma

EAT...

VSD94108251

8

Improvement

of

S-VHS

Deviation

(fo)

Adjustment

EAT...

VSD9410S251

9

Reduction

of

Fan

Motor

Noise

EAT...

VSD9410S251;

—:10

Prevention

of

Screws

Contacting

the

Capstan

EAT...

VSD9410S251;

11

Elimination

of

Part

E4T...

VSD9410S252;

12

Change

of

TBC

(1)

©.

B.A

|

FAT...

VSD94108252

13

Change

of

VIDEO

|/0

C.

B.

A

FaT...

VSD94108252

14

Change

of

SERVO/SYSCON

C.

B.

A

FAT...

VSD94108253

15

Elimination

of

Deleted

Parts

FAT...

VSD9410S253

|

16

Improvement

of

Video

Monitor

Output

Signal

F4aT...

VSD94108253|

17

__—«(|Change

of

Parts

Number

FAT...

VSD9410S253

18

Change

of

EP-ROM

(Ver.

Up)

Ae

1VSD9410S253/

19

(Countermeasure

of

One

Frame

Editing

Fa...

VSD9410S253

VSD94108253

23

Expansion

of

Y/C

Timing

Adjustment

Range

G47...

VSD9410S253

24

_‘|Change

of

IC

VSD9410S253

25

Change

of

EP-ROM

(Ver.

Up)

G4...

VSD9410S8253!

26

[Accidental

Erasure

of

Y-DNR

Latch

G47...

VSD9410S254

2]

Transistor

Change

HAT...

VSD9410S8255

28

Change

of

IC

H47...

VSD94108255

29

Expansion

of

Carrier

Balance

Adjustment

Range

H4T...

VSD94108255

30

Countermeasure

of No

Picture

or

Black

Streaking

H4T...

VSD9410S256|

31

Countermeasure

of

Random

Sparkling

Noise

Har...

VSD9410S256

32

Change

of

Specification

for

Adjustment

H47...

VSD94108257

33

Change

of

Parts

List

147...

VSD94108257

34

Change

of

EP-ROM

(Ver.

Up)

{|

147...

VSD9410S258

35

{Addition

of

Connector

147...

VSD9410S258

36

Countermeasure

for

Color

Change

l47...

VSD94108258

37

Change

of

IC

Jat...

VSD9410S258

38

Improvement

of

Distortion

of

Hecdphones

Output

(Mod1)

J4y...

VSD9410S258|

39

|

Improvement

of

Distortion

of

Hecdphones

Output

(Mod2)

i

ee

VSD9410S258

40

Improvement

of

One

Frame

Editing

Jay...

VSD94108258

41

Countermeasure

for

Black

output

in

Jog

Mode

|

Jal...

VSD9410S258

42

_|Countermeasure

for

Accidental

Latch

of

Y-DNR

Jy...

VSD9412S259

43

Change

of

Mechanical

Parts

C47...

VSD9501S286

44

Change

of

TBC

(1)

C.

B.A

K41...

VSD9501S286

45

Reduction

of

Jitter

K4].

..

VSD95018286

46

Countermeasure

for

Flicker

|

K4l..

VSD9501S286|

47

__—s[Reduction

of

Skew

at

Edit

Point

K47.

..

VSD9501S286

48

[Expansion

of

SYSTEM

SC

PHASE

ADJ.

Range

LAT...

VSD9501S286

49

Addition

of

ACK

Function

&

Improvement

of

Y

Signal

Chara

LAT

..

VSD9501S286

90

_|Change

of

Mechanical

Parts

E.

EAL

os

Order

No

Bulletin

No

51

Sub

ject

Elimination

of

CAC Y/C

Timing

Adjustment

52

t

Effective

from

Improvement

of

Low

Video

Signal

Recording

93

Countermeasure

of

Holizontal

Line

54

Improvement

of

Video

Frequency

Response

55

Change

of

Part

56

Improvement

of

Cassette

Compartment

57

Correction

of

Service

Manual

98

Countermeasure

of

P.C.

Board

Crack

59

Change

of

IG

VSD9506S201|

60

Change

of

EP-ROM

(Ver.

Up)

VSD9506S201

61

Change

of

Microcomputer

VSD95068215|

62

(Countermeasure

of

Y-DNR

Mulfunction

VSD95068215

63

Change

of

EP-ROM(Ver.

Up)

VSD9506S215

|

64

Improvement

of

the

Motor

Drive

Circuit

VSD95068215

65

Prevention

of

Sync-generator

Mul

function

VSD9506S216

66

Change

of

Microcomputer

VSD95068216

67

Prevention

of

Audio

No

Recording

VSD95068217

68

Change

of

Capaciror

VSD9605S206

VSD9605S207

69

Change

of

Part

Inprovement

of

Picture

Quality

Countermeasure

of

Time

code

Mulfunction

Change

of

SERVO

&

SYSTEM

CONTROL

C.

B.A.

Change

of

TBC

(1)

C.B.A.

Change

of

Head

Amp

C. B.

A

2.

AG-DS840P

SUPPLEMENTS

Bul

letin

;

Effective

Order

No

Sub

ject

<com

VSD9410S256

4

Countermeasure

of

Random

Sparkling

Noise

ie

VSD9410S256

2

Change

of

Specification

for

Adjustment

H4T.

.

VSD9410S258

3

Addition

of

Connector

(AT...

VSD94108258

4

Countermeasure

for

Color

Change

147...

VSD9410S258

5

Change

of

IC

J4T..

VSD94108258

6

Improvement

of

Distortion

of

Hecdphones

Output

(Mod1)

JAT..

VSD9410S258

7

Improvement

of

Distortion

of

Hecdphones

Output

(Mod2)

L4T..

VSD94108258

8

_|Improvement

of

One

Frame

Editing

JAT.

.

VSD9410S258

9

Countermeasure

for

Black

output

in

Jog

Mode

JAT...

VSD9410S258

10

Countermeasure

for

Accidental

Latch

of

Y-DNR

|

JA4T..

VSD94128259

11.

{Change

of

Mechanical

Parts

CAT...

VSD9501S286

12

Change

of

TBC

(1)

C.

B.

A

KAT.

.

VSD9501S286

13

Reduction

of

Jitter

KAT..

VSD9501S286

14

Countermeasure

for

Flicker

KAT..

VSD9501S286

15

Reduction

of

Skew

at

Edit

Point

K4T..

VSD95018286

16

Expansion

of

SYSTEM

SC

PHASE

ADJ.

Range

K4T...

VSD9501S286

17

Improvement

of

Y

Signal

characteristics

KAT...

VSD9501S286

18

Change

of

Mechanical

Parts

LAT...

VSD95018286

19

Elimination

of

CAC

Y/C

Timing

Adjustment

ee

VSD9501$286

20

Countermeasure

of

Holizontal

Line

LAT...

VSD9501S286

21

Improvement

of

Video

Frequency

Response

LAT...

VSD9501S294

23

Improvement

of

Cassette

Compartment

C5T...

VSD95068201

24

Countermeasure

of

P.C.Board

Crack

BST...

VSD95068201

25

Change

of

IC

BST...

VSD95068201

26

Change

of

EP-ROM

(Ver.

Up)

BST...

VSD95068201

ai

Change

of

Microcomputer

|

BST...

VSD9506S8215|

28

Countermeasure

of

Y-DNR

Mul

function

BOT...

VSD95068215

29

Change

of

EP-ROM(Ver.

Up)

BOT...

VSD9506S215|

30

_—i|

Improvement

of

the

Motor

Drive

Circuit

BST...

VSD95068215

31

Prevention

of

Sync-generator

Mul

function

BOT...

VSD95068217

32

Change

of

Capaciror

BOT...

VSD95068219

33

Change

of

Part

DST...

VSD95068220

34

Inprovement

of

Picture

Quality

E57...

VSD9605$206|

37

Change

of

SERVO

&

SYSTEM

CONTROL

C.B.

A.

b

EST.

3

VSD9605S206

38

E57...

t

Change

of

TBC

(1)

C.B.A.

Exploded

Views

&

Parts

Lists

NOTES

1.

©

Be

sure

to

make

your

orders

of

replacement

parts

according

to

this

list.

@®'<R>'

in

Remark

column

indicates

recommended

parts.

@'<M>'

in

Remark

column

indicates

needed

in

the

periodical

maintenance.

2.

IMPORTANT

SAFETY

NOTICE

Components

identified

by

'<!>*

have

special

characteristics

imporant

for

safety.

When

replacing

any

of

these

components,

use

only

the

original

ones.

Meaning

of

symbol

'<!>"

on

this

pants

list

is

exactly

the

same

as

symbol

LNon

Schematic

and

Circuit

Board

Diagrams.

3,

Unless

otherwise

specified

;

All

resistors

are

in

(Q),

K=1,000Q,

M=1,000kQ.

All

capacitors

are

in

(F),

U=10*F,

P=10'?

F.

4.

ITEM

NUMBERS

WITH

CAPITAL

LETER

E

Item

numbers

with

capital

leter

E

(Example:€1,

&2,...)

in

RefNo.

column

mean

that

the

pars

are

listed

with

the

E

item

numbers

in

the

exploded

views.

5,

The

main

assembled

parts

are

shown

below

C.B.A.

marked

with

‘MS.

6.

When

ordering

parts,

use

parts

No.

only

form

Part

No.

column.

7.

Printed

circuit

board

assembly

with

mark.(RTL)

is

no

longer

available

after

discontinuation

of

the

product.

8.

Abbreviations

for

parts

;

--

NAME

-- --

DESCRIPTION

--

C.CAPACITOR

CERAMIC

CAPACITOR

C.CAPACITOR

CH

CERAMIC

CHIP

CAPACITOR

E.CAPACITOR

ELECTROLYTIC

CAPACITOR

G.CAPACITOR

GLASS

CAPACITOR

M.CAPACITOR

MICA

CAPACITOR

P.CAPACITOR

PLASTIC

FILM

CAPACITOR

§.CAPACITOR

SEMI-CONDUCTOR

CAPACITOR

T.CAPACITOR

TANTALUM

CAPACITOR

TRIMMER

C.RESISTOR

CARBON

RESISTOR

F.RESISTOR

FUSE

RESISTOR

M.RESISTOR

METAL

OXSIDE

RESISTOR

M.RESISTOR

CH

METAL

OXSIDE

CHIP

RESISTOR

S.RESISTOR

SOLID

RESISTOR

V.RESISTOR

VARIABLE

RESISTOR

W.RESISTOR

WIRE

WOUND

RESISTOR

COMBI.

TR-R

TRANSITOR-RESISTOR

COMBINATION

PARTS

COMBI.

R-R

RESISTOR-RESISTOR

COMBINATION

PARTS

COMBI.

C-R-L

CAPACITOR-COIL

COMBINATION

PARTS

C.B.A.

CIRCUIT

BOARD

ASSEMBLY

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VFKO329

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PACKING

CASE

PACKING

CASE

CUSHION

(LEFT

TOP)

CUSHION

(RIGHT

TOP)

CUSHION

(LEFT

BOTTOM)

CUSHION

(RIGHT

BOTTOM)

PAD

OPERATING

INSTRUCTIONS

OPERATING

INSTRUCTIONS

1.

CHASSIS

PARTS

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HUMIDITY

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UNIT

LOADING

MOTOR

UNIT

MOTOR

BASE

(1)

UNIT

CONNECTOR

(2P)

CONNECTOR

(2P)

CONNECTOR

(2P)

CONNECTOR

(3P)

CONNECTOR

(13P)

CONNECTOR

(15P)

IMPEDANCE

ROLLER

SUPPORT

ANGLE

MOTOR

PULLEY

ADJUST

SPRING

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HEAD

(1)

UNIT

A/C

HEAD BASE

UNIT

A/C

HEIGHT

SPRING

THRUST

SCREW

UNIT

OIL

SEAL

HOUSING

UNIT

PRESSURE

ROLLER

UNIT

PINCH

PRESSURE

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P4

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DOWN

GEAR

HEAD

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UNIT

CLEANING

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HEAD

CLEANING

PAD

CAM

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CAM

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SOLENOID

BASE

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MOUNT

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UNIT

LED

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PARTS

SECTION

2.

PRT

—-5

Part

No.

{Part

Name

&

Description

Pes]

Remarks

WORM

SHAFT

UNIT

LOADING

BELT

WORM

WHEEL

INTERMEDIATE

GEAR

BASE

(1)

UNIT

EARTH

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UNIT

STATOR

BASE

UNIT

FG

SUPPORT

(1)

FG

SUPPORT

(2)

HOLE

IC

CONNECTOR

(3P)

CONNECTOR

(8P)

CONNECTOR

(3P)

SOLENOID

MAIN

BRAKE

(S)

UNIT

BRAKE

SPRING

MAIN

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(T)

UNIT

TAKEUP

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TABLE

UNIT

SUPPLY

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UNIT

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UNIT

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1

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3.

CASSETTE

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PHOTO

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UNIT

PRT-7

Remarks

Part

Name

&

Description

Saas

CASSETTE

COMPERTMENT

UNIT

TOP

PLATE

CASSETTE

HOLDER

CAP

CASSETTE

HOLDER

ANGLE

HOLDER

GUIDE

(L)

HOLDER

ANGLE

UNIT

CASSETTE

HOLDER

GUIDE

(R)

UNIT

DOOR

OPEN

LEVER

DOOR

OPEN

LEVER

SPRING

HOLDER

GUIDE

(R)

RELEASE

SPRING

RELEASE

LEVER

SIDE

PLATE

(L)

UNIT

OPENER

LEVER

SIDE

PLATE

(R)

UNIT

SLIDE

SWITCH

DOWN

SUPPORT

LEVER

DOWN

SUPPORT

SPRING

MAIN RACK

UNIT

DAMPER

SUB

RACK

UNIT

RACK

C

SPRING

CLUTCH

SPRING

SUB

WIPER

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(L)

SUB

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ARM

(L)

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3-2

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1

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CASE

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vwz0103

INSULATION

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SHEET

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PLATE

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POWER

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HEAT

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POWER

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CASE

(LOWER)

TR

HOLDER

C.B.

HOLDER

REAR

JACK

PLATE

FOR

AG-DS850HP

REAR

JACK

PLATE

FOR

AG-DS840HP

TOP

ANGLE

(LEFT)

SIDE

ANGLE

UNIT

TOP

ANGLE

(RIGHT)

MECHANISM

SHIELD

PLATE

POWER

CORD

SHIELD

ANGLE

SUPPORT

ANGLE

C.B.

HEAT

SINK

HEAT

SINK

PLATE

(1)

HEATSINK

PLATE

(2)

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FAN

MOTOR

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REAR

AMP

ANGLE

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5.

CASING

PARTS

SECTION

PRT

—

11

Remarks

Part

Name

&

Description

SIDE

PANEL

(LEFT)

TOP

PANEL

SPACER

TOP

PANEL

SPACER

MINI

CLAMPER

C.B.

HOLDER

(1)

C.B.

HOLDER

(2)

SUPPORT

ANGLE

UNIT

OPERATION

BUTTON

FOR

AG-DS850HP

OPERATION

BUTTON

FOR

AG-DS840HP

OPERATION

BUTTON HOLDER

SLIDE

KNOB

SHEET

PCS:9

AG-DS840HP

KNOB

HOLD

ANGLE

PCS:9

AG-DS840HP

REV.

PANELIGHT

FWD_PANELIGHT

|

SIDE

PANEL

(RIGHT)

FANT

ART

ARLE

a

POWER

SWITCH

COVER

a

VR

KNOB

OPERATION

AREA

COVER

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XTV4+12J

XTV3+8F

PRT

-12

ELECTRICAL

REPLACEMENT

PARTS

LIST

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PRT

—

13

Panasonic AG-DS850HP User manual

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