Panasonic SV-3500 Guida rapida

Panasonic

Audio

Division

Matsushita

Electric

Industrial

Co.

Ltd.

ORDER

NO.

AD8809230T

D 3

ffifcofl

Guide

■

Contents

General

Major

Blocks

and

Their

Operation

Section

Signal

Processing

Circ it

A dio

Section

Panel

Control

System

Control

Circ it

101

Servo

131

Tape

Fewer

S pply

136

10.

Mechanism

11.

141

Tro bleshooting

Man al

12.

163

13.

Adj stment

Man al

176

14.

Description

Major

IC's

187

General

Major

Blocks

and

Operation

Function

the

SV-3500

Major

Blocks

and

Operation

General

1-1.

Function

the

SV-3500

(1)

(2)

(3)

—

•

terminals

cables

permit

digital.

recorder

and

cylinder

head

sed

for

signal

recording

and

playback.

Use

motor

and

mode

switching

stainless

steel

chassis,

Post-recording

f nction

The

post-recording

f nction

for

s bcode

data

permits

program

n mbers

rewritten

and

skip

ID's

written.

(direct

drive)

capstan

motor

for

tape

and

mo nting

the

mechanism

res lt

stable

main

feat res

are

listed

below.

The

SV-3500

f ll-fledged

DAT

(Digital.

A dio

Tape)

with

coaxial

and

optical,

digital

I/O

terminals,

for

inp t

o tp t

addition

the

analog

LINE

IN/OUT

terminals.

Use

level

F rthermore,

free

level,

displays.

SV-3500

compatible

with

broadcast

and

(Japan

only)

permitting

digital

m sic

signals

from

broadcast

digit

display,

from

digital

signal,

display

ass res

error

The

digital

signal

inp t

and

o tp t

terminals

for

fiber

optic

cables

and

coaxial

cables

permit

digital,

copying

tapes.

(To

another

DAT

recorder

with

digital

inp t

and

o tp t

compatibility)

F rthermore

the

satellite

modes

recording

the

satellite

t ner.

meters

with

large

the

direct

display

system,

digital,

data

decoder

digital

tape

transport.

The

Basic

Operation

Added

F nction

(1)

(2)

(4)

Increased

IC's

the

power

s pply

circ it

the

SV-3500

has

red ced

the

size

the

board

area.

position

program

and

a tomatically

the

old

start

ID.

the

Start

ID:

Move

starting

Ren mber

Ren mbers

the

programes.

Skip

ID:

Recording

ndesired

skipped

d ring

playback,

fast

forwarded,

A to

(absol te

time)

Writes

the

absol te

time

onto

tape

which

has

been

recorded

recorder

not

capable

writing

the

absol te

time.

Also

compatible

with

KHz

digital

recording,

the

SV-3500

capable

digital,

recording

the

broadcast

satellite

modes

and

(The

SV-3500

compatible

only

with

mode

KHz).

the

position

the

start

which

entered

the

erases

The

post-recording

f nction

for

s bcode

data

has

been

added

permit

the

SV-3500

change

the

following

data.

The

m sic

scan

(introd ction

search)

f nction

plays

only

the

first

seconds

each

program.

The

"cleaning"

indicator

f nction

has

been

added

inform

the

ser

when

the

head

req ires

cleaning.

(Lights

when

the

error

rate

exceeds

1000).

this

g ide,

each

block

fig re

2-1

described.

skip

the

beginning

and

end

part

recorded

tape

enables

that

part

(When

skip

detected

tape

fast

forwarded,

and

when

the

start

detected

the

tape

played

back).

Major

Blocks

and

Their

Operation

Cylinder

(head)

Circ it

(chapter

Signal.

Processing

Circ it

(chapter

A dio

Circ it

(chapter

Pane).

Control

Circ it

(chapter

System

Control

Circ it

(chapter

Servo

Board

(chapter

the

mm^f

cylinder

head

which

helically

scans

the

DAT

tape

sed.

The

tape

has

wrap

angle

degree

with

respect

the

cylinder

and

the

cylinder

fitted

with

two

heads,

and

The

signal

distorted

waveform

recording

the

tape,

circ it

which

amplifies

and

waveshapes

the

signal

that

signal

can

processed

easily

the

data

slice

circ it

the

stage.

This

circ it,

the

heart

the

mechanism

operation

control,

receives

vario s

types

data

from

the

panel

control

circ it,

signal

processing

circ it

and

servo

circ it,

and

controls

the

overall

operation

the

system.

This

circ it

incl des

the

A/D

and

D/A

converters

and

mainly

handles

the

m sic

signal.

reprod ced

the

cylinder

has

considerably

(compared

the

digital

signal

)

when

The

circ it

contains

waveshaping

the

This

circ it

prod ces

the

format

the

signal

recorded

the

tape

d ring

recording

and

interleaves

the

data

and

adds

error

correcting

codes.

D ring

playback,

reading

the

m sic

signal,

error

correction,

error

interpolation,

and

reading

the

s bcode

data

are

performed.

This

circ it

also

generates

the

clocks

sed

the

SV-3500.

This

circ it

perform

inp t

processing

the

control

keys,

control

the

display

and

exchanges

control

data

with

the

system

control

circ it.

This

circ it

monitors

and

controls

mechanism.

the

operation

Mechanism

(chapter

and

Power

s pply

Circ it

(chapter

10)

This

the

Mechanism

Block

(chapter

11)

10)

mechanism

same

SV-D1000

(Technics

1st

generation

Cylinder

J37

PLL

bloc

J37

H.P

J 6

Figure

2-1

Organization

the

SV-3500

DEW

Mechanism

(chapter

11)

This

DAT)

OPEN/CLOSE

board

(

chapter

)

Panel

control

circ it

(chapter

A dio

circ it

(chapter

()

LINE

IN/OUT

()

DIGITAL

IN/OUT

()

OPTICAL

IN/OUT

Servo

board

(chapter

System

control

circuit

(chapter

Power

supply

board

(chapter

10)

J 3

J 4

mechanism

(chapter

circuit

supplies

the

and

power

required

various

circuits

the

SV-3500.

Signal

processing

circuit

(chapter

This

mechanism

driven

single

motor

and

loads

unloads

the

tape.

Section

3- .

Block

Diagram

Description

3-2.

Playback

Circuit

Operation

3-3.

Recording

Circuit

Operation

3-1.

Block

Diagra

Description

4th

AMP

LPF

—

----

RSRF

(playback

signal)

Head

Playback

Circ it

Block

HSW

(head

switch)

REC

AMP

Recording

Circ it

Block

SRRF

(recording

signal)

Playback

Circ it

signals

picked

head

and

head

then

Recording

Circuit

Integra

tion

A/B

separat

ion

Wave

shaping

for

SRRP

■-•-(recording

signal)

playback

switching

low

A/B

Head

A/B

mixing

removed

the

eye

processing

lst-3rd

AMP

ra!

fir'

•

[_777_

]

(3)

The

the

eq alization.

serial

signal

amplified

approximately

4th

amplifier

and

sent

the

eq alizer

___

Integra

During

playback'

OFF

•

During

recording:

OFF

|lst-3rd

AMP

(2)

The

separated

signals

are

amplified

their

respective

amplifiers

and

sent

head

and

head

The

recording

c rrent

switching

circ it

gain

switching

circ it

which

changes

the

level

the

PCM

and

ATF

components

the

signals

for

recording.

pattern

rectang lar

circ it

signal

filter,

the

signal

sent

the

waveshaping

circ it,

’

waveshaped

and

then

sent

the

signal

RSRF

signal

(which

digital

data

Recording

c rrent

switching

lg_r

rec

amp

Fig re

3-1-1

Block

Diagram

(1)

The

signals

picked

head

and

head

are

sent

thro gh

the

rotary

transformers

their

respective

three

amplifiers

and

amplified

approximately

and

each

signals

sent

the

integrators.

(1)

The

recording

signal.

(SRRF)

sent

from

the

signal,

processing

circ it

separated

the

A/B

separator,

HSW

signal,

control,

into

signals

for

head

and

head

(2)

the

integrators,

each

signal

s bjected

freq ency

compensation

and

the

res lt

sent

the

mixer.

Based

HSW

signal

control,

the

A/B

mixer

converts

the

signals

reprod ced

head

and

head

serial,

signal.

(4)

After

the

nwanted

MHz

and

above

components

are

the

low-pass

waveshaping

circ it.

the

eq alized

signal

wave

the

3-2.

Playback

Circuit

Operation

Fran

the

Heads

the

4th

Amplifier

TP353

(IC35

30)

VCC1

*5V

TP352

R362

Q352

Fran

the

recording

amplifier

(pin

IC-351)

Fran

the

recording

amplifier

(pin

IC-351)

Figure

3-2-1

Playback

Circuit

Diagram

(1)

(2)

(3)

When

from

IC-351

(AN7030S)

command

goes

turn

this

the

R/P

S/W

driver

A/B

S/W

driver

Next,

351,

(At

Thus,

are

and

are

the

R381

co-L-

-(A

Head

r=3ii^

Head

Cylinder

GND

APB

AREC

BPB

BREC

J28

GND

APB

BPB

BREC

"2.

A/B

mixer

—

-42ndJ>

—

3W4

AMP

—

XHx

—

”

“

co-j-ci

-r-M

<?|

0(4 ;

C354jt

Q357

J-

O0W39V38J

amp

(J3o3

—

035

------

Q355/x>.

J27

•

]

RPSV

|ll|

SRRP|

HSW

C355O*

4^)0358

ffi)

----

Q351

and

Q352,

which

are

connected



and

this

gro nds

the

REC

side

the

heads,

time,

Q355

and

Q356

the

side

are

off).

signals

picked

the

heads

are

sent

Q353

and

Q354

(via

the

rotary

transformers

and

pins

and

connector

J28).

They

are

amplified

and

then

sent

pins

and

IC-531.

Q357

and

Q358

are

provided

prevent

C354

and

C355

from

discharging

d ring

recoeding.

connector

J27

goes

low

d e

the

signal,

processing

block,

IC-351

low.

Then,

high

o tp t

appears

IC-531

and

low

o tp t

appears

22.

The

signals

inp t

pins

and

IC-351

amplified

the

2nd

and

3rd

amplifiers

within

the

o tp t

from

pins

and

42.

The

o tp t

signals

s bjected

low

freq ency

compensation

integrators,

consisting

C370

thro gh

C373

and

thro gh

R384,

and

inp t

pins

and

the

IC-351.

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