Harman Kardon DC5300 Manuel utilisateur

The

Harman

Kardon

Model

DC5300

DUAL

CASSETTE

DECK

Manual

177A

echnical

Manual

The

following

marks

found

in

the

parts

list

of

this

manual

identify

the

models

as

follows.

>

:

North

America

area

model

Black

version

@

:

international

model

Black

version

:

Australia

model

Black

version

CONTENTS

SPECIFICATIONS

Qu...

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GENERAL

UNIT

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8

LEAKAGE

TEST

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GENERAL

UNIT

PARTS

LIST

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ccc

ccceecccceeesees

9

CONTROLS

AND

FUNCTIONS

...2.........ccseeeseeeeees

CASSETTE

TAPE

PLAYER/RECORDER

DISASSEMBLY

PROCEDURES

.........ceccccsseeccceees

MECHANISM,

PARTS

LIST

.....cceecccccccececcecececcees

9

POWER

CORD

REPLACEMENT

........ccccccceerecorcees

WIRING

DIAGRAM

............cceccsccsseccccassceeccneesacces

10

BLOCK

DIAGRAM

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P2

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BOARDS

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iacé

odecaghoteanaviaes

11

CIRCUIT

DESCRIPTION

uu...

cc.

c.cccccecccscssccsessscceese

ELECTRICAL

PARTS

LIST

...2........00seessccossseceueeee

13

TIMING

CHART.

.0.......cccccccsscccssscccesssccssecucscecerenscces

IC

BLOCK

DIAGRAM

.........cccccseeccnescccescccseseccseres

20

ALIGNMENT

PROCEDURES

...........eccccccececeueeceeee

SCHEMATIC

DIAGRAM

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ee

23

harman/kardon

Parts

and

Service

Office

;

240

Crossways

Park

West,Woodbury,N.Y.

11797

1112-0010A152

P-129109

2000

Printed

in

Japan

i

is

\

f

ooesoa

°

=

o

9

oO

a

SPECIFICATIONS

Nominal

Limit

4-track

2

Channel

Stereo

Cassette

Deck

Track

Configuration

+

MECHANICAL

SECTION

Record/Playback

Tape

Speed

Drift

4.75

cm/sec.

0.2%

<

2.0%

Heads

(Primary/Secondary)

2/1

Wow

and

Flutter

NAB

0.05%

<

0.1%

CCIR

0.08%

Take

Up

Torque

50

gr.cm

35-70

gr.cm

Back

Tension

2

gr.cm

2-6

gr.cm

F.FWD

Torque

100

gr.cm

70

—

150

gr.cm

_

Rew

Torque

100

gr.cm

70

-—

150

gr.cm

F.FWD/Rew

Time

85

sec.

<

100

sec.

(C-60

Tape)

«

AMPLIFIER

SECTION

Record/Playback

Frequency

Response

(at

-3

dB)

LN

20-18

kHz

20-17

kHz

CrO2

20-18kHz

20-17

kHz

Metal

20-18kHz

20-17

kHz

Copy

Mode

Frequency

Response

LN

40

-

16

kHz

40

-

15

kHz

CrO2

40-16kHz

40-15

kHz

Metal

40

-

16

kHz

40

-

15

kHz

105

kHz

+5

kHz

620

mV

£1.5

dB

Bias

Frequency

Playback

Output

Signal-to-Noise

Ratio

(at

Line

Input)

(Input

1

kHz,

100

mV)

IHF-A

WTD

(at

Dolby

level)

Dolby

NR

off

LN

51

dB

CrO2.-

54

dB

Metal

54dB

Dobly

B

NR

LN

61

dB

CrO2

64

dB

>

60

dB

Metal

64

dB

>

60

dB

Nominal

Limit

Dolby

C

NR

LN

~

=66dB

CrO2

70dB

>

66

dB

Metal

70

dB

2

66

dB

Channel

Separation

45

dB

235

dB

Crosstalk

70

dB

2

60

dB

Record/Playback

Distortion

(Input

1

kHz)

LN

0.9%

$

2.0%

CrO2.

1.3%

s

3.0%

Metal

1.1%

s

2.0%

MPxX

Filter

Attenuation

at15kHz

0.3dB

<1dB

at19

kHz

35dB

2

30dB

Erase

Ratio

(Input

80

Hz)

LN

70

dB

2

60

dB

Metal

61

dB

256

dB

Input

Sensitivity

(Input

1

kHz)

at

Line

Input

43

mV

30-80

mV

Input

Impedance

(Input

1

kHz)

at

Line

Input

23

kQ

15

-

25

kQ

»

DIMENSIONS

(WxHxD)

17-3/8"

x

5”

x

12-5/8"

(443

x

134

x

342)

mm

¢

WEIGHT

17.2

Ibs

(7.8

kg)

¢

POWER

SUPPLY

U.S.A.

and

Canada

models

Internationa!

model

AC120V,

60

Hz

AC230V/240V,

50/60

Hz

¢

POWER

CONSUMPTION

U.S.A.

and

Canada

models

29

W

International

model

31W

These

specifications

are

service

target

specs.

Specifications

and

components

are

subject

to

change

without

notice.

Overall

performance

will

be

maintained

or

improved.

LEAKAGE

TEST

(FOR

SERVICE

ENGINEERS

IN

THE

U.S.A)

Before

returning

the

unit

to

the

user,

perform

the

following

safety

checks:

1.

Inspect

all

lead

dress

to

make

certain

that

leads

are

not

pinch-

ed

or

that

hardware

is

not

lodged

between

the

chassis

and

other

metal

parts

in

the

unit.

2.

Replace

all

protective

devices

such

as

nonmetallic

control

knobs,

insulating

fishpapers,

cabinet

backs,

or

shields,

isola-

tion

resistorcapacitor

networks,

mechanical

insulators,

etc.

3.

Be

sure

that

no

shock

hazard

exists;

check

for

leakage

current

using

Simpson

Model

229

Leakage

Tester,

standard

equipment

item

No.

21641,

RCA

Model

WT540A

or

use

alternate

method

as

follows:

Plug

the

AC

line

cord

directly

into

a

120-volt

AC

receptacle

(do

not

use

an

Isolation

Transformer

for

this

test).

Using

two

clip

leads,

connect

a

1500

ohm,

10-watt

resistor

paralleled

by

a

0.15mF

capacitor,

in

series

with

all

exposed

metal

cabinet

parts

and

a

known

earth

ground,

such

as

a

water

pipe

or

conduit.

Use

a

VTVM

or

VOM

with

1000

ohms

per

volt,

or

higher

sensitivity

to

measure

the

AC

voltage

drop

across

the

resistor.(See

Diagram.)

Move

the

reisistor

connection

to

each

exposed

metal

part

having

a

return

path

to

the

chassis

(antenna,

metal,

cabinet,

screw

heads,

knobs

and

control

shafts,

escutcheon,

etc.)

and

measure

the

AC

voltage

drop

across

the

resistor.

(This

test

should

be

performed

with

the

power

switch

in

both

the

On

and

Off

positions.)

TO

EACH

EXPOSED

METAL

SURFACE

OF

UNIT

UNDER

TEST

SIMPSON

MODEL

229

ETC.

FOR

LEAKAGE

TEST

TO

AC

GROUND

SUCH

AS

WATER

PIPE,BX

CABLE,

CONDUIT,

ETC.

HIGH

GROUND

VOLTAGE

LEAD

OR

+LEAD

VTVM

©

AC

SCALEO

TEST

PROBE

CONNECT

TO

KNOWN

EARTH

GROUND

TO

EXPOSED

METAL

PARTS

A

reading

of

0.35

volt

RMS

or

more

is

excessive

and

indicates

a

potential

shock

hazard

which

must

be

corrected

before

returning

the

unit

to

the

owner.

CONTROLS

AND

FUNCTIONS

Direction

Mode

Selects

one

way,

reverse,

Input

Balance

or

continuous

transport

Adjusts

recording

balance

of

mode.

left

and

right

channels

Fine

Trim

Input

Level

Adjust

when

recording.

Adjusts

recording

level.

Power

Switch

PRI/SEC

Transport

Selector

Press

to

turn

unit

on/off.

Selects

which

transport

(either

Primary

or

Secondary)

is

to

be

operated

by

the

transport

controls.

arman/kardon

DC5300

onda!

Cassette

Deck

Power

PRI

%

<d<

PP

R

Stop

ug

RECORD

MPx

!

{4

[op

conte

wi

spo

Stops

tape

movement.

no

Bc

j

1

CE

cory

oo

ac

MEMORY

di

ake

EDIT

=MEMORY

Reverse

Play

.

Begins

playback

or

recording

in

:

!

a

:

J,

reverse

direction.

I

}

‘

i

vel

inpuMatance

ias

Mie

Tom

ry

Ti

Rewind

Rapidly

ane

=

SSC

tape.

Eject

f

0

é

7

sync

Press

to

load/remove

tape

:

REVERSE

cassette

in

Primary

transport.

Rec/Pause

Puts

cassette

deck

in

Record-

ready

or

Pause

mode.

Dolby

NR

#

Memory

Eject

Selects

Dolb

Press

on:

when

<@<q@

is

pressed,

J

——$———

y

on/off,

Dolby

fape

rewind

to

approximatel

Press

to

load/remove

tape

Play

B

mode,

or

Dolby

C

mode.

Hest

on

aunt

sa

pneey,

cassette

in

Secondary

transport.

Begins

playback

or

Fast

Forward

MPX

Filter

ener

Reset

recording.

Rapidly

advances

tape.

Rec

Mute

Press

when

using

Dolby

noise

Resets

Counter

to

Inserts

blank

space

when

reduction

while

recording

FM

00:00.

recording.

stereo

broadcasts.

PRI

Iluminates

when

Primary

tape

transport

is

currently

operated

by

the

transport

controls.

SEC

llluminates

when

Secondary

tape

transport

is

currently

operated

by

the

transport

controls.

LEVEL

MPX

Shows

signal

level.

Indicates

MPX

Filter

is

engaged.

<<>>

18

Displays

operating

mode

of

transport:

Record,

Forward

Play,

Reverse

Play,

Fast

Forward,

Rewind,

Pause,

Stop.

<<>pP

ile

Displays

operating

mode

of

transport:

Record,

Forward

Play,

Reverse

Play,

Fast

Forward,

B

-35

-20 -10

-7 -5 -3

-1

OO

+1

43 +5 48

Rewind,

Pause,

Stop.

RECORD

a

Illuminates

when

transport

is

i

Record

mode.

RECORD

MPX

|

CONT

HISPD

DO

Bc

Oo

BC

4

DO

Bc

illuminates

if

Dolby

B

or

MEMORY

\

rent

Iuminates

if

Dolby

B

or

C

circuits

are

on.

C

circuits

are

on.

TRANSPORT

MODE

Indicates

transport

mode:

one

way,

auto

reverse,

continuous.

MEMORY

Indicates

Memory

is

engaged.

MEMORY

Indicates

Memory

is

engaged.

Indicates

unit

is

in

Copy

mode.

EDIT

0:00

Indicates

unit

is

in

Indicates

tape

position

Edit

mode.

in

minutes

and

seconds.

HI

SPD

Indicates

unit

is

in

High

Speed

Copy

mode.

Copy

Press

to

begin

automatic

copying

procedure.

Hi-Speed

Copy

Press

to

begin

automatic

high

speed

copying

procedure.

Sync

Reverse

Activates

automatic

synchronized

reverse

copying

in

Copy

and

Hi-

Speed

Copy

modes.

Edit

Press

to

begin

Edit

mode.

*

NOTE

Dolby

noise

reduction

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

“DOLBY”

and

the

double-D

symbol

[X]

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

CONTROLS

AND

FUNCTIONS

Direction

Mode

Selects

one

way,

reverse,

or

continuous

transport

mode.

Input

Level

Adjusts

recording

level.

Power

Switch

PRI/SEC

Transport

Selector

Press

to

turn

unit

on/off.

Selects

which

transport

(either

Primary

or

Secondary)

is

to

be

operated

by

the

transport

controls.

arman/kardon

DC5300

odal

Cassette

Deck

PRI

“

a<a

>>

R

Stop

acon

MPX

BC

Reverse

Play

———_—_—______—

a

Stops

tape

movement.

oo

we

MEMORY

Begins

playback

or

recording

in

: .

Primary

Transpov

reverse

direction.

!

(

pau

Rewind

————_$_—$—_———__—_—

*;

me

a

Rapidly

rewinds

tape.

Dffrorey

ec

nr;

Dif.

AUTO-RE|

Eject

Press

to

load/remove

tape

cassette

in

Primary

transport.

|

REC

PAUSE

MUTE

Rec/Pause

Puts

cassette

deck

in

Record-

ready

or

Pause

mode.

:

a

Dolby

NR

+

Selects

Dolby

on/off,

Dol

(

Play

B

mode,

or

Dolby

C

mod

.

Begins

playback

or

Fast

Forward

MPX

Filter

————

‘

recording.

Rapidly

advances

tape.

Rec

Mute

Press

when

using

Dolby

Inserts

blank

space

when

reduction

while

recording

recording.

stereo

broadcasts.

PRI

Illuminates

when

Primary

tape

transport

is

currently

operated

by

the

(

.

transport

controls.

!

LEVEL

MPX

Shows

signal

level.

Indicates

MPX

Filter

is

engaged.

<<>>

18

Displays

operating

mode

of

transport:

Record,

Forward

Play,

Reverse

Play,

Fast

Forward,

Rewind,

Pause,

Stop.

B

-35

-20

-10

-7

-5

-3

-1

QQ

+1

+3

+5

+8

RECORD

Te

INuminates

when

transport

is

i

Record

mode.

R

SS

Se

<<

iT

RECORD

MPX

[7]

CONT

HISPD

Oo

pc

Od

BC

Illuminates

if

Dolby

B

or

MEMORY

C

circuits

are

on.

TRANSPORT

MODE

Indicates

transport

mode:

one

way,

auto

reverse,

continuous.

‘

MEMORY

Indicates

Memory

is

engaged.

Indicates

|

mode.

EDIT

10:00

Indicates

uni

Indicates

tape

position

Edit

mode.

in

minutes

and

seconds.

HISPD

Indicates

unit

is

Speed

Copy

mc

Input

Balance

Adjusts

recording

balance

of

left

and

right

channels

Fine

Trim

Adjust

when

recording.

InputPalance

jas

A

Pcandary

Transpprt

C

R

i

Hi

Cut

DIRECTION

MODE

RESET

EJECT

ae

|

/

Memory

Eject

off,

Dolby

ee

Pont

akneatt

Press

to

load/remove

tape

C

mode.

pe

0

app

y

cassette

in

Secondary

transport.

00:00

on

Counter.

Reset

}

Dolby

noise

Resets

Counter

to

cording

FM

00:00.

3.

SEC

llluminates

when

Secondary

tape

transport

is

currently

operated

by

the

transport

controls.

<<4>pPile

Displays

operating

mode

of

transport:

Record,

Forward

Play,

Reverse

Play,

Fast

Forward,

Rewind,

Pause,

Stop.

DO

Bc

MEMORY

Iuminates

if

Dolby

B

or

C

circuits

are

on.

PY

é

ay

MEMORY

jicates

unit

is

in

Copy

Indicates

Memory

is

de.

engaged.

tes

unit

is

in

1ode.

sunit

is

in

High

opy

mode.

Copy

Press

to

begin

automatic

copying

procedure.

Hi-Speed

Copy

Press

to

begin

automatic

high

speed

copying

procedure.

Sync

Reverse

Activates

automatic

synchronized

reverse

copying

in

Copy

and

Hi-

Speed

Copy

modes.

Edit

Press

to

begin

Edit

mode.

*

NOTE

Dolby

noise

reduction

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

“DOLBY”

and

the

double-D

symbol

[X]

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

DC5300

DISASSEMBLY

PROCEDURES

(REFER

TO

PAGE

9,

10

and

11)

[1]

TOP

COVER

(133)

REMOVAL

Remove

4

screws

(A)

and

2

screws

(B),

andthen

remove

the

Top

Cover(133).

FRONT

PANEL

ASSEMBLY

(AA)

REMOVAL

1.

Remove

the

Top

Cover

(133).

2.

Disconnect

1

connector

(JL901)

from

(CN904)

on

the

Main

P.

C.

Board

(PCB-1).

3.

Remove

6

screws

(C)

and

3

screws

(D),

and

the

remove

the

Front

Panel

Assembly

(AA).

4.

If

necessary,

unsolder

the

lead

wires.

CASSETTE

TAPE

RECORDER

MECHANISM

ASSEMBLY

(103)

REMOVEL

1.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

Step

2.)

2.

Disconnect

4

connectors

(LCN101/351,

LCN801,

LCN802

and

LCN803)

on

the

Primary

Transport

P.

C.

Board

(103).

3.

Remove

4-screws

(E),

and

then

the

Cassette

Tape

Recorder

Mechanism

Assembly

(103).

[4]

CASSETTE

TAPE

PLAYER

MECHANISM

ASSEMBLY

(104)

REMOVAL

1.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

Step

2).

2.

Disconnect

4

connectors

(LCN151,

LCN806,

LCN807

and

LCN808)

on

the

Secondary

Transport

P.

C.

Board

(104).

3.

Remove

4

screws

(F),

and

then

the

Cassette

Tape

Player

Mechanism

Assembly

(104).

[5]

MAIN

P.

C.

BOARD

(PCB-1)

REMOVAL

1.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

step

2).

2.

Disconnect

4

connectors

(LCN151,

LCN806,

LCN807

and

LCN808)

onthe

Secondary

TransportP.

C.

Board

(103).

.

Disconnect

4

connectors

(LCN101/351,

LCN801,

LCN802

and

LCN803)

on

the

Primary

Transport

P.

C.

Board

(104).

.

Disconnect

5

Jumper

Leads

(JL1,

JL2,

JL3,

JL4

and

JL5)

from

5

connectors

(CN805,

CN804,

CN803,

CN802

and

CN801)

on

the

Power

P.

C.

Board

(PCB-4).

.

Remove

9

screws

(G),

1

screw

(H)

and

2

screws

(I)

and

then

remove

the

Main

P.

C.

Board

(PCB-1).

POWER

P.

C.

BOARD

(PCB-4)

REMOVAL

1.

2.

3.

4.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

step

2).

Disconnect

5

Jumper

Leads

(JL1,

JL2,

JL3,

JL4

and

JL5)

on

the.

Power

P.

C.

Board

(PCB-4).

Disconnect

3

connectors

(LCN801,

LCN802

and

LCN803)

on

the

Primary

Transport

P.

C.

Board.

Remove

5

screws

(J)

and

4

screws

(K),

and

then

remove

the

Power

P.

C.

Board

(PCB-4).

OTHER

P.C.

BOARDS

REMOVAL

1.

2.

3.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

step

2).

Remove

4

screws

(L),

and

then

remove

the

Cont

SW-L

P.

C.

Board

(PCB-7).

Remove

3

screws

(M),

and

then

remove

the

Cont

SW-R

P.

C.

Board

(PCB-6).

.

Remove

3

Rotary

Knobs

(146)

and

3

screws

(N),

and

then

remove

the

Volume

P.

C.

Board

(PCB-2).

.

Remove

7

screws

(QO),

and

then

remove

the

Front

P.

C.

Board

(PCB-5).

POWER

CORD

REPLACEMENT

(FOR

SERVICE

ENGINEERS

OTHER

THAN

NORTH

AMERICA)

In

order

to

prevent

fire

shock

hazard

when

replacing

the

power

cord,

follow

the

Procedure

below

to

replace

the

part

with

the

standard

supply

parts.

Pi

POWER

CORD

PCB-4

CABINET

BACK

100mm

MAX.

8mm

The

signal

from

the

playback

head

(Primary

Transport)

is

amplified

by

the

playback

amplifier

Q101,

Q103

and

Q.105

(L

ch.),

and

is

applied

to

the

29

(L

ch.)

and

2

(R

ch.)

of

the

Dolby

NR

1IC501

(B/C

type)

through

the

Switching

1IC701.

Use

the

same

signal

for

both

the

secondary

transport

and

the

primary

transport.

Switching

of

the

playback

signal

from

the

record

mode

(external

input

signal)

to

the

playback

mode

is

per-

formed

inside

IC501.

IC501

is

usually

switched

to

the

playback

mode.

How-

ever,

the

control

signal

transmitted

to

the

5

of

IC501

from

1C751

through

0505

and

0506

switches

IC501

from

the

record

mode

to

the

playback

mode.

The

input

signal

to

IC501

is

output

from

the

pins

25

(Lch.)

and

6

(R

ch.)

and

applied

to

the

OUTPUT

AMP.

RECORD

SIGNAL

The

signal

from

the

INPUT

jack

is

controlled

by

the

INPUT

LEVEL

control.

It

is

applied

to

the

pins

30

(L

ch.)

and

1(R

ch.)

of

the

Dolby

NR

1C501

(B/Ctype):

Switching.

of

the

record

signal

from

the

playback

mode

to

the

record

mode

is

performed

inside

IC501.

The

control

signal

transmitted.

to

the

pin'5

of

1C501

from

[C751

through

Q505

and

Q506

switches

1C501

from

the

play-

back

mode

to

the

record

mode.

The

input

signal

to

the

Dolby

NR

IC

is

Siku

from

the

pins

28

(L

ch.)

and

3

(Rch.)

of

C501

and

passed

through

the

MPX

filter.

Then

it

is

input

to

the

pins

27

(Lch.)

and

4

(R

ch.)

and

is

output

from

the

pins

24

(L

ch.)

and

7

(R

ch.).

The

encoded

signal

is

input

to

the

pins

23

(L

ch.)

and

8

(Rch.)

and

then

it

is

output

from

the

pins

18

(Lch.)

and

13

(R

ch.).

The

signal

output

from

1C501

passes

through

the

record

equalizer

circuit

and

is

amplified

by

the

record

amplifier

of

1C201.

The

amplified

signal

is

then

applied

to

the

recording

head

after

being

synthesized

by

a

bias

signal.

©

INPUT

LEVEL

25

Jt

MPX

DOLBY

—9

Ji

OUTPUT

HL

B.C

NA

CIRCUIT

INPUT

Apel

J2

PLAYBACK

AMP

Sut

Q101—-106

REMOTE

8{

SWITCHING

J3

RPH1

PRIMARY

~~

(7a

IN

=

I

|

ie

I

[

EQUALIZER

|

+—{

><]

SOLENOIA

CIRCUIT

!

of

1

(AEE

|

Q201—

212

ICaot}-agnteet

Peiciee

S|

b--}----4----4------}-----=-

LOGIC

CONTROL

[aga

GAP

STAN

ae

Arsh

SOLENOIA

SECONDARY

~~

—_—

Hn

REEL

|SECONDARY

CAPSTAN

MOTOR

EMI

ita

es

MAIN

CONTROLLER

FeApe

7

ic901

$913

S910

S909

S911

S914

S904

S908

S902

__—-sg05

$016_$920_s918

$912

$915 $907

$906

PLAYBACK

SIGNAL

MUTING

OPERATION

The

signal

that

mutes

the

sound

produced

at

switching

to

recording

or

playback

is

applied

from

IC751

of

the

logic

control

block.

When

the

“STOP”

button

is

pressed,

the

mute

signal

output

from

the

22

of

IC751

turns

ON

Q709

(L

ch.)

and

Q710

(R

ch.)

to

short-circuit

the

output

signals

of

the

playback

amplifiers

for

muting.

For

the

purpose

of

preventing

generation

of

noise

at

power

ON/OFF,

the

mute

signal

is

output

from

051.

The

muting

is

done

by

short

circuiting

the

output

signal

with

Q709

(L

ch.)

and

Q710

(R

ch.)

turned

ON.

LOGIC

FOR

RECORD

MODE

When

the

“REC”

button

is

pressed,

the

11

of

IC751

becomes

high

level

and

0109

(L

ch.)

and

Q110

(R

ch.)

turn

ON. The

input

to

the

Dolby

NR

IC

is

muted.

Also

Q712

and

Q713

turn

ON

and

Q711

turns

OFF.

Therefore

0701,

0703

(L

ch.)

and

Q702,

0704

(R

ch.)

turn

OFF

to

release

the

muting

of

the

outputs

from

the

record

amplifiers.

Also,

0505

turns

ON

and

0506

turns

OFF

to

make

the

5

of

IC501

high

level.

Therefore

the

mode

is

switched

to

the

record

mode.

LOGIC

FOR

RECORD

TO

PLAYBACK

MODE

When

the

“STOP”,

“PAUSE”

or

“PLAY”

button

is

pressed,

the

12

of

C751

becomes

high

level.

0.219

turns

ON

and

Q213

(Lch.),

Q214

(Rch.)

turn

ON

to

mute

the

inputs

to

the

record

amplifiers.

Also,

Q712

and

Q713

turn

OFF

and

Q711

turns

ON

to

turn

ON

Q701,

Q703

(L

ch.)

and

Q702,

0704

(R

ch.).

Therefore

the

outputs

from

the

record

amplifiers

are

muted.

Also,

0505

turns

OFF

and

Q506

turns

ON

to

make

the

5

of

C501

low

level.

Therefore

the

mode

is

switched

to

the

playback

mode.

DISASSEMBLY

PROCEDURES

(REFER

TO

PAGE

9,

10

and

11)

[1]

TOP

COVER

(133)

REMOVAL

Remove

4screws

(A)

and

2

screws

(B),

andthen

remove

the

Top

Cover(133).

FRONT

PANEL

ASSEMBLY

(AA)

REMOVAL

1.

Remove

the

Top

Cover

(133).

2.

Disconnect

1

connector

(JL901)

from

(CN904)

on

the

Main

P.

C.

Board

(PCB-1).

3.

Remove

6

screws

(C)

and

3

screws

(D),

and

the

remove

the

Front

Panel

Assembly

(AA).

4.

If

necessary,

unsolder

the

lead

wires.

CASSETTE

TAPE

RECORDER

MECHANISM

ASSEMBLY

(103)

REMOVEL

1.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

Step

2.)

2.

Disconnect

4

connectors

(LCN101/351,

LCN801,

LCN802

and

LCN803)

on

the

Primary

Transport

P.

C.

Board

(103).

3.

Remove

4-screws

(E),

and

then

the

Cassette

Tape

Recorder

Mechanism

Assembly

(103).

[4|

CASSETTE

TAPE

PLAYER

MECHANISM

ASSEMBLY

(104)

REMOVAL

1.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

Step

2).

2.

Disconnect

4

connectors

(LCN151,

LCN806,

LCN807

and

LCN808)

on the

Secondary

Transport

P.

C.

Board

(104).

3.

Remove

4

screws

(F),

and

then

the

Cassette

Tape

Player

Mechanism

Assembly

(104).

[5]

MAIN

P.

C.

BOARD

(PCB-1)

REMOVAL

1.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

step

2).

2.

Disconnect

4

connectors

(LCN151,

LCN806,

LCN807

and

LCN808)

onthe

Secondary

TransportP.

C.

Board

(103).

3.

Disconnect

4

connectors

(LCN101/351,

LCN801,

LCN802

and

LCN803)

on

the

Primary

Transport

P.

C.

Board

(104).

4.

Disconnect

5

Jumper

Leads

(JL1,

JL2,

JL3,

JL4

and

JL5)

from

5connectors

(CN805,

CN804,

CN803,

CN802

and

CN801)

on

the

Power

P.

C.

Board

(PCB-4).

5.

Remove

9

screws

(G),

1

screw

(H)

and

2

screws

(I)

and

then

remove

the

Main

P.

C.

Board

(PCB-1).

POWER

P.

C.

BOARD

(PCB-4)

REMOVAL

1.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

step

2).

:

2.

Disconnect

5

Jumper

Leads

(JL1,

JL2,

JL3,

JL4

and

JL5)

on

the.

Power

P.

C.

Board

(PCB-4).

3.

Disconnect

3

connectors

(LCN801,

LCN802

and

LCN803)

on

the

Primary

Transport

P.

C.

Board.

4.

Remove

5

screws

(J)

and

4

screws

(K),

and

then

remove

the

Power

P.

C.

Board

(PCB-4).

OTHER

P.C.

BOARDS

REMOVAL

1.

Remove

the

Front

Panel

Assembly

(AA).

(Refer

to

step

2).

2.

Remove

4

screws

(L),

and

then

remove

the

Cont

SW-L

P.

C.

Board

(PCB-7).

3.

Remove

3

screws

(M),

and

then

remove

the

Cont

SW-R

P.

C.

Board

(PCB-6).

4.

Remove

3

Rotary

Knobs

(146)

and

3

screws

(N),

and

then

remove

the

Volume

P.

C.

Board

(PCB-2).

5.

Remove

7

screws

(O),

and

then

remove

the

Front

P.

C.

Board

(PCB-5).

POWER

CORD

REPLACEMENT

(FOR

SERVICE

ENGINEERS

OTHER

THAN

NORTH

AMERICA)

In

order

to

prevent

fire

shock

hazard

when

replacing

the

power

cord,

follow

the

Procedure

below

to

replace

the

part

with

the

standard

supply

parts.

Pi

POWER

CORD

Ba]

rt

HOLDER

11

POWER

TRANSFORMER

BLUE

PCB-4

CABINET

BACK

100mm

MAX.

8mm

BLOCK

DIAGRAM

INPUT

LEVEL

VR203,

204

a

input

©

PLAYBACK

AMP

Q101-106

8}

SWITCHING

RPHI

oy

PRIMARY

J

EQUALIZER

CIRCUIT

Q201~

212

PLAYBACKAMP}]

{i

i

Q151-156

PH1

SECONDARY

~~.

EH1

ERASE

X

9

HEAD

CIRCUIT

DESCRIPTION

PLAYBACK

SIGNAL

The

signal

from

the

playback

head

(Primary

Transport)

is

amplified

by

the

playback

amplifier

Q101,

Q103

and

Q105

(Lch.),

and

is

applied

to

the

29

(Lch.)

and

2

(R

ch.)

of

the

Dolby

NR

IC501

(B/C

type)

through

the

Switching

IC701.

Use

the

same

signal

for

both

the

secondary

transport

and

the

primary

transport.

Switching

of

the

playback

signal

from

the

record

mode

(external

input

signal)

to

the

playback

mode

is

per-

formed

inside IC501.

1C501

is

usually

switched

to

the

playback

mode.

How-

ever,

the

control

signal

transmitted

to

the

5

of

IC501

‘from

1C751

through

Q505

and

Q506

switches

IC501

from

the

record

mode

to

the

playback

mode.

The

input

signal

to

1C501

is

output

from

the

pins

25

(Lch.)

and

6

(R

ch.)

and

applied

to

the

OUTPUT

AMP.

RECORD

SIGNAL

The

signal

from

the

INPUT

jack

is

controlled

by

the

INPUT

LEVEL

control.

It

is

applied

to

the

pins

30

(L-ch.)

and

1(R

ch.)

ofthe

Dolby

NR

IC501

(B/Ctype):

Switching

of

the

record

signal

from

the

playback

mode

to

the

record

mode

is

performed

inside

IC501.

The

control

signal

transmitted

to

the

pin'5

of

IC501

from

1C751

through

0505

and

0506

switches

IC501

from

the

play-

back

mode

to

the

record

mode.

The

input

signal

to

the

Dolby

NR

IC

is

output

from

the

pins

28

(Lch.)

and

3

(Rch.)

of

C501

and

passed

through

the

MP

X

filter.

Then

it

is

input

to

the

pins

27

(Lch.)

and

4(R

ch.)

and

is

output

from

the

pins

24

(L

ch.)

and

7

(R

ch.).

The

encoded

signal

is

input

to

the

pins

23

(L

ch.)

and

8

(Rch.)

and

then

it

is

output

from

the

pins

18

(Lch.}

and

13

(R

ch.).

The

signal

output

from

1C501

passes

through

the

record

equalizer

circuit

and

is

amplified

by

the

record

amplifier

of

1C201.

The

amplified

signal

is

then

applied

to

the

recording

head

after

being

synthesized

by

a

bias

signal.

MPX

DOLBY

B.C

NR

CIRCUIT

C501

Q505,

506

$913

S910 S909

S911

S914 S904 S908

uA

“©

output

J2

OUT

REMOTE

3

IN

1

———=—5

[><]

SOLENOIA

nREEL

16801}

an

EEE

CAPSTAN

LOGIC

CONTROL

10

MOTOR

(C751

[><]

SOLENOIA

REEL

ein

SECONDARY

CAPSTAN

MOTOR

MAIN

CONTROLLER

IC901

$902 $905

$916

$920 S918

MUTING

OPERATION

The

signal

that

mutes

the

sound

produced

at

switching

to

recording

or

playback

is

applied

from

IC751

of

the

logic

contro!

block.

When

the

“STOP”

button

is

pressed,

the

mute

signal

output

from

the

pin 22

of

1C751

turns

ON

Q709

(L

ch.)

and

Q710

(R

ch.)

to

short-circuit

the

output

signals

of

the

playback

amplifiers

for

muting.

For

the

purpose

of

preventing

generation

of

noise

at

power

ON/OFF,

the

mute

signal

is

output

from

Q51.

The

muting

is

done

by

short

circuiting

the

output

signal

with

Q709

(L

ch.)

and

Q710

(R

ch.)

turned

ON.

LOGIC

FOR

RECORD

MODE

When

the

“REC”

button

is

pressed,

the

11

of

iC751

becomes

high

level

and

0109

(L

ch.)

and

Q110

(R

ch.)

turn

ON.

The

input

to

the

Dolby

NR

IC

is

muted.

Also

Q712

and

Q713

turn

ON

and

Q711

turns

OFF.

Therefore

Q701,

Q703

(L

ch.)

and

Q702,

Q704

(R

ch.)

turn

OFF

to

release

the

muting

of

the

outputs

from

the

record

amplifiers.

Also,

0505

turns

ON

and

Q506

turns

OFF

to

make

the

5

of

IC501

high

level.

Therefore

the

mode

is

switched

to

the

record

mode.

LOGIC

FOR

RECORD

TO

PLAYBACK

MODE

When

the

“STOP”,

“PAUSE”

or

“PLAY”

button

is

pressed,

the

12

of

C751

becomes

high

level.

0219

turns

ON

and

0213

(Lch.),

0214

(R

ch.)

turn

ON

to

mute

the

inputs

to

the

record

amplifiers.

Also,

Q712

and

Q713

turn

OFF

and

Q711

turns

ON

to

turn

ON

Q701,

Q703

(L

ch.)

and

0702,

Q704

(R

ch.).

Therefore

the

outputs

from

the

record

amplifiers

are

muted.

Also,

0505

turns

OFF

and

0506

turns

ON

to

make

the

5

of

{C501

low

level.

Therefore

the

mode

is

switched

to

the

playback

mode.

TIMING

CHART

STOP

REV.PLAY

STOP

FF

STOP

FWD.PLAY

STOP

REC.PAUSE

FWD.REC

REV.REC.

'

+

F

r

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i

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j

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kevin

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r

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SOL

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=

SOL

wre

a

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lp

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SSS

ee

—

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See

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BIAS

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REC

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—————————

LINE

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PB

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REV.PLAY

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REV.PLAY

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four

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Harman Kardon DC5300 Manuel utilisateur

Manuels Lecteur de cassettes populaires d'autres marques