Panasonic AG-DS850HP Manuale utente

ORDER

NO.

VSD9605M201

Service

Manual

Panasonic

SVS

[li-lF

Editing

Video

Cassette

Recorder

AG-DS850HP

Editing

Video

Cassette

Player

AG-DS840HP

lease

use

this

simplified

service

manual

with

the

service

manual

for

Model

AG-

DS850P_

Velume

(Order

No.

VSD9403M244),

Volume

(Order

No.

VSD9404M245)

and

Model

AG-DS840P

(Order

No.

VSD9411M264).

Also

please

refer

the

supplement

service

manual

for

AG-

DS850P

and

AG-

DSB40P.

1996

Matsushita

Electric

Industria!

Co.,

Ltd.

All

right)

reserved.

Unauthorized

copying

and

distribution

violation

hw.

Panasonic.

WARNING

This

service

information

designed

for

experienced

repair

technicians

only

and

not

designed

for

use

the

general

public.

does

not

contain

warnings

cautions

advice

non-technical

individuals

potential

dangers

attempting

service

product.

Products

powered

electricity

should

serviced

repaired

only

experienced

professional

technicians.

Any

attempt

service

repair

the

product

products

dealt

with

this

service

manual

anyone

else

could

result

serious

injury

death.

INTRODUCTION

This

Simplified

Service

Manual

describes

the

changes

from

Panasonic

S-VHS

Hi-Fi

Video

Cassette

Recorder

“Player

model

AG-DS850P“AG-DS840P

AG-DS850HP“AG-DS840HP.

contains

the

list

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

Leh

ele

PRN

Ree

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SAFETY

PRECAUTIONS

eee

Tee

CST

EER TEE

Cee

AG-DS850P

SUPPLEMENTS

covcccccttcctctt

ttt

etter

terre

treet

nent

eee

nes

AG-DS840P

SUPPLEMENTS

TELTTTECLCTRTLERETETE

CECE

PPP

PPR

Teer

eer

EXPLODED

VIEWS

REPLACEMENT

PARTS

LISTS

«vvrrssrrsserrrrerrees

PRT-1

SAFETY

PRECAUTIONS

GENERAL

GUIDELINES

When

servicing

observe

the

original

lead

dress.

short

circuit

found,

replac

all

parts

which

have

been

overheated

damaged

the

short

circuit.

After

servicing,

see

that

all

the

protectiv

devices

such

insulation

barriers,

insulation

papers

shields

are

properly

installed.

After

servicing

make

the

following

leakage

current

checks

prevent

the

customer

from

being

exposed

shock

hazards.

LEAKAGE

CURRENT

COLD

CHECK

Unplug

the

cord

and

connect

jumper

between

the

two

prongs

onthe

plug.

Measur

the

resistance

value,

with

ohm

meter,

between

the

jumpered

plug

and

each

exposed

metallic

cabinet

part

the

equipment

such

screwhead

connectors,

contr

shafts,

etc.

When

the

exposed

metallic

part

has

return

path

the

chassis,

the

reading

shoulb

between

1IMQ

and5.2MQ.

When

the

exposed

metal

dose

not

have

return

path

the

chassis,

the

reading

must

©.

VOLTMETER

Hot-Check

Circuit

COLD

WATER

PIPE

(EARTH

GROUND)

APPLIANCE’S

EXPOSED

METAL

PARTS

15002

10W

Figure

LEAKAGE

CURRENT

HOT

CHECK

(See

Figure

Plug

the

cord

directly

into

the

outlet.

not

use

isolation

transformer

for

this

check.

Connect

1.5K,

10W

resistor,

inparallel

with

0.15

capacitor,

between

each

exposed

metallic

part

the

set

good

earth

ground

such

water

pipe,

shown

Figure

Use

voltmeter,

with

1000

ohms/

volt

sensitivity,

measur

the

potential

across

the

resistor.

Check

each

exposed

metallic

part,

and

measure

the

voltage

each

point.

Reverse

the

plug

the

outlet

repeat

each

the

above

measurements.

The

potantial

any

point

should

not

exceed

0.75

volts

RMS.

leakage

current

tester

(Simpson

Model

229

equivalent)

may

used

make

the

hot

checks,

leakage

current

must

not

exceed

1/2

milliamp.

case

measurement

outside

the

limits

specified,

there

possiblity

shock

hazard,

and

the

equipment

should

repaired

and

rechecked

before

returned

the

customer.

ELECTROSTATICALLY

SENSITIVE(

ES)

DEVICES

Some

semiconductor

(solid

state)

devices

can

damaged

easily

static

electricity.

Such

components

commonly

are

called

Electrostatically

sensitive

(ES)

Devices.

Examples

typical

devices

are

integrated

circuits

and

some

field-effect

transistors

and

semiconductor

“chip”

components.

The

following

techniques

should

used

help

reduce

the

incidence

component

damage

caused

static

electricity.

Immediately

before

handling

any

semiconductor

component

semiconductor-equipped

assembly,

drain

off

any

electrostatic

charge

your

body

touching

known

earth

ground.

Alternatively,

obtain

and

wear

commercially

available

discharging

wrist

strap

device,

which

should

removed

for

potential

shock

reasons

prior

applying

power

the

unit

under

test.

After

removing

electrical

assembly

equipped

with

devices,

place

the

assembly

conductive

surface

such

aluminum

foil,

prevent

electrostatic

charge

buildup

exposure

the

assembly.

Use

only

grounded

tip

soldering

iron

solder

unsolder

devices.

Use

only

anti-static

solder

removal

device

classified

“anti-static”

can

generate

electrical

charges

sufficient

damage

devices.

not

use

freon-propelled

chemicals.

These

can

generate

electrical

charges

sufficient

damage

devices.

not

remove

replacement

device

from

its

protective

package

untilimmediately

before

you

are

ready

instal!

it.

(most

replacement

devices

are

packaged

with

leads

electrically

shorted

together

conductive

foam,

aluminum

foil

comparable

conductive

material).

Immediately

before

removing

the

protective

material

from

the

leads

replacement

device,

touch

the

protective

material

the

chassis

circuit

assembly

into

which

the

device

will

installed.

CAUTION:

sure

power

applied

the

chassis

circuit,

and

observe

all

otner

asfety

precautions.

Minimize

bodily

motions

when

handling

unpackaged

replacement

devoces.

(Otherwise

harmless

mother

such

the

brushing

together

your

clothes

fabric

the

lifting

your

foor

from

carpeted

floor

can

generate

static

electricity

sufficient

damage

device).

AG-DS850P

SUPPLEMENTS

Bulletin

Effective

Sub

ject

from

VSD9410S8250

Correction

Service

Manual

VSD9410S251

Change

Parts

Number

VSD94108251

Change

EP-ROM(Ver

Up)

DAT...

VSD9410S8251

Change

Parts

List

DAT...

VSD94108251

Change

Screw

DAT...

VSD94108251

Change

Parts

Number

E4T...

VSD9410S251/

Improvement

Temp.

Chara.

H.Noise

Chroma

EAT...

VSD94108251

Improvement

S-VHS

Deviation

(fo)

Adjustment

EAT...

VSD9410S251

Reduction

Fan

Motor

Noise

EAT...

VSD9410S251;

—:10

Prevention

Screws

Contacting

the

Capstan

EAT...

VSD9410S251;

Elimination

Part

E4T...

VSD9410S252;

Change

TBC

(1)

©.

B.A

FAT...

VSD94108252

Change

VIDEO

|/0

FaT...

VSD94108252

Change

SERVO/SYSCON

FAT...

VSD94108253

Elimination

Deleted

Parts

FAT...

VSD9410S253

Improvement

Video

Monitor

Output

Signal

F4aT...

VSD94108253|

__—«(|Change

Parts

Number

FAT...

VSD9410S253

Change

EP-ROM

(Ver.

Up)

1VSD9410S253/

(Countermeasure

One

Frame

Editing

Fa...

VSD9410S253

VSD94108253

Expansion

Y/C

Timing

Adjustment

Range

G47...

VSD9410S253

_‘|Change

VSD9410S253

Change

EP-ROM

(Ver.

Up)

G4...

VSD9410S8253!

[Accidental

Erasure

Y-DNR

Latch

G47...

VSD9410S254

Transistor

Change

HAT...

VSD9410S8255

Change

H47...

VSD94108255

Expansion

Carrier

Balance

Adjustment

Range

H4T...

VSD94108255

Countermeasure

of No

Picture

Black

Streaking

H4T...

VSD9410S256|

Countermeasure

Random

Sparkling

Noise

Har...

VSD9410S256

Change

Specification

for

Adjustment

H47...

VSD94108257

Change

Parts

List

147...

VSD94108257

Change

EP-ROM

(Ver.

Up)

147...

VSD9410S258

{Addition

Connector

147...

VSD9410S258

Countermeasure

for

Color

Change

l47...

VSD94108258

Change

Jat...

VSD9410S258

Improvement

Distortion

Hecdphones

Output

(Mod1)

J4y...

VSD9410S258|

Improvement

Distortion

Hecdphones

Output

(Mod2)

VSD9410S258

Improvement

One

Frame

Editing

Jay...

VSD94108258

Countermeasure

for

Black

output

Jog

Mode

Jal...

VSD9410S258

_|Countermeasure

for

Accidental

Latch

Y-DNR

Jy...

VSD9412S259

Change

Mechanical

Parts

C47...

VSD9501S286

Change

TBC

(1)

B.A

K41...

VSD9501S286

Reduction

Jitter

K4].

VSD95018286

Countermeasure

for

Flicker

K4l..

VSD9501S286|

__—s[Reduction

Skew

Edit

Point

K47.

VSD9501S286

[Expansion

SYSTEM

PHASE

ADJ.

Range

LAT...

VSD9501S286

Addition

ACK

Function

Improvement

Signal

Chara

LAT

VSD9501S286

_|Change

Mechanical

Parts

EAL

Order

Bulletin

Sub

ject

Elimination

CAC Y/C

Timing

Adjustment

Effective

from

Improvement

Low

Video

Signal

Recording

Countermeasure

Holizontal

Line

Improvement

Video

Frequency

Response

Change

Part

Improvement

Cassette

Compartment

Correction

Service

Manual

Countermeasure

P.C.

Board

Crack

Change

VSD9506S201|

Change

EP-ROM

(Ver.

Up)

VSD9506S201

Change

Microcomputer

VSD95068215|

(Countermeasure

Y-DNR

Mulfunction

VSD95068215

Change

EP-ROM(Ver.

Up)

VSD9506S215

Improvement

the

Motor

Drive

Circuit

VSD95068215

Prevention

Sync-generator

Mul

function

VSD9506S216

Change

Microcomputer

VSD95068216

Prevention

Audio

Recording

VSD95068217

Change

Capaciror

VSD9605S206

VSD9605S207

Change

Part

Inprovement

Picture

Quality

Countermeasure

Time

code

Mulfunction

Change

SERVO

SYSTEM

CONTROL

B.A.

Change

TBC

(1)

C.B.A.

Change

Head

Amp

C. B.

AG-DS840P

SUPPLEMENTS

Bul

letin

;

Effective

Order

Sub

ject

<com

VSD9410S256

Countermeasure

Random

Sparkling

Noise

VSD9410S256

Change

Specification

for

Adjustment

H4T.

VSD9410S258

Addition

Connector

(AT...

VSD94108258

Countermeasure

for

Color

Change

147...

VSD9410S258

Change

J4T..

VSD94108258

Improvement

Distortion

Hecdphones

Output

(Mod1)

JAT..

VSD9410S258

Improvement

Distortion

Hecdphones

Output

(Mod2)

L4T..

VSD94108258

_|Improvement

One

Frame

Editing

JAT.

VSD9410S258

Countermeasure

for

Black

output

Jog

Mode

JAT...

VSD9410S258

Countermeasure

for

Accidental

Latch

Y-DNR

JA4T..

VSD94128259

11.

{Change

Mechanical

Parts

CAT...

VSD9501S286

Change

TBC

(1)

KAT.

VSD9501S286

Reduction

Jitter

KAT..

VSD9501S286

Countermeasure

for

Flicker

KAT..

VSD9501S286

Reduction

Skew

Edit

Point

K4T..

VSD95018286

Expansion

SYSTEM

PHASE

ADJ.

Range

K4T...

VSD9501S286

Improvement

Signal

characteristics

KAT...

VSD9501S286

Change

Mechanical

Parts

LAT...

VSD95018286

Elimination

CAC

Y/C

Timing

Adjustment

VSD9501$286

Countermeasure

Holizontal

Line

LAT...

VSD9501S286

Improvement

Video

Frequency

Response

LAT...

VSD9501S294

Improvement

Cassette

Compartment

C5T...

VSD95068201

Countermeasure

P.C.Board

Crack

BST...

VSD95068201

Change

BST...

VSD95068201

Change

EP-ROM

(Ver.

Up)

BST...

VSD95068201

Change

Microcomputer

BST...

VSD9506S8215|

Countermeasure

Y-DNR

Mul

function

BOT...

VSD95068215

Change

EP-ROM(Ver.

Up)

BOT...

VSD9506S215|

_—i|

Improvement

the

Motor

Drive

Circuit

BST...

VSD95068215

Prevention

Sync-generator

Mul

function

BOT...

VSD95068217

Change

Capaciror

BOT...

VSD95068219

Change

Part

DST...

VSD95068220

Inprovement

Picture

Quality

E57...

VSD9605$206|

Change

SERVO

SYSTEM

CONTROL

C.B.

EST.

VSD9605S206

E57...

Change

TBC

(1)

C.B.A.

Exploded

Views

Parts

Lists

NOTES

sure

make

your

orders

replacement

parts

according

this

list.

@®'<R>'

Remark

column

indicates

recommended

parts.

@'<M>'

Remark

column

indicates

needed

the

periodical

maintenance.

IMPORTANT

SAFETY

NOTICE

Components

identified

'<!>*

have

special

characteristics

imporant

for

safety.

When

replacing

any

these

components,

use

only

the

original

ones.

Meaning

symbol

'<!>"

this

pants

list

exactly

the

same

symbol

LNon

Schematic

and

Circuit

Board

Diagrams.

Unless

otherwise

specified

;

All

resistors

are

(Q),

K=1,000Q,

M=1,000kQ.

All

capacitors

are

(F),

U=10*F,

P=10'?

ITEM

NUMBERS

WITH

CAPITAL

LETER

Item

numbers

with

capital

leter

(Example:€1,

&2,...)

RefNo.

column

mean

that

the

pars

are

listed

with

the

item

numbers

the

exploded

views.

The

main

assembled

parts

are

shown

below

C.B.A.

marked

with

‘MS.

When

ordering

parts,

use

parts

No.

only

form

Part

No.

column.

Printed

circuit

board

assembly

with

mark.(RTL)

longer

available

after

discontinuation

the

product.

Abbreviations

for

parts

;

NAME

-- --

DESCRIPTION

C.CAPACITOR

CERAMIC

CAPACITOR

C.CAPACITOR

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

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

See

sete,

ete

ees

SERVICING

FIXTURE

TOOL

LIST

|_|

VEMBO80HOFP

VHS

ALIGNMENT

TAPE

RETAINING

RING

REMOVER

VFKO329

POST

ADJ.

SCREWORIVER

(30m/4nm)

VFKO132

BACK

TENSION

METER

(T2-H7-UM)

HEX.

WRENCH

SET

(TENTELOMETER,

MOLYTONE

GREASE

MADE

U.S.A.)

S.C.R.

GREASE

VFKO191

POST

ADJ.

PLATE

HEAD

CLEANING

STICK

DIAL

TORQUE

GAUGE

PLASTIC

CLAMPER

ONLY

ADAPTOR

FOR

VFK0133

REEL

TABLE

HEIGHT

GAUGE

TENSION

POST

ADJ.

FIXTURE

TENSION

SENSOR

ADJ.

FIXTURE

H-POSITION

ADJ.

SCREWDRIVER

FINE

ADJ.

SCREWDRIVER

(3am

PHI)

POST

HEIGHT

ADJ.

FIXTURE

TYPE

SCREWDRIVER

FAN

TYPE

TENSION

GAUGE

EXTENDER

BOARD

100P

EXTENDER

CODE

13P

EXTENDER

OODE

40P

EXTENDER

BOARD

64P

PRT

—-1

EXPLODED

VIEWS

~—s

PACKING

PARTS

SECTION

PACKING

CASE

PACKING

CASE

CUSHION

(LEFT

TOP)

CUSHION

(RIGHT

TOP)

CUSHION

(LEFT

BOTTOM)

CUSHION

(RIGHT

BOTTOM)

PAD

OPERATING

INSTRUCTIONS

OPERATING

INSTRUCTIONS

CHASSIS

PARTS

SECTION

se}

REV

TENSION

PRT

-3

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