Kenwood Ka-727 User manual

SetVice

MANUAL

KENWOOD

KA-/2/

STEREO

INTEGRATED

AMPLIFIER

Metallic

cabinet

{A01-0699-1

2)

Knob

Panel

ass’y

(K29-1549-04)

x

2

{A20-3982-01)

ot

ya

|

#

Pa

rh

#

et

:

KENWOOD

STERED

a

AMPLE

«

A-

72?

{

i

Knob

(K29-1550-04)

x

3

Knob

(K27-1207-04)

Phone

jack

Knob

(E11-0111-05)

(K27-1179-03)

Phono

jack

Phono

jack

Phono

jack

(E13-0624-05)

(E13-0818-05)

(E4

3-0496-05)

EA

PEB

ADANTOR

9

6

E|S

Oo

Ole

GO

60

0/0000

<p

©»

7,

GND

(NO8-01

28-35)

Knob Knob

(K27-1180-03)

|

(K27-11

78-03)

(J12-0094-05)

x

2

Knob

(K27-1248-13}

(K27-091

7-04)

Knob

(K29-1548-04)

Phono

jack

(E13-0225-05)

Knob

(K27-1176-03)

Knob

(K27-1177-03)

(K27-1181-04)}

AC

outlet

(EO3-)*

SPEAKERS

(A,8:6~169,A4+B8:12~1692)

rT.

i

-PARLEURS

(AouB:4

~

16

i

162

.Aet8-8

~

NO

UNSWITCHED

SWITCHED

2OOW

MAX.

I

TOTAL

100W

MAX.

=)

cl

i

I]

—

50

60Hz

AC

power

cord

Lock

terminal

board

(E20-0821-05)

(E30-)*

“Refer

to

Parts

List

on

page

8.

a

ee

re

4

KA-72/

DISASSEMBLY

FOR

REPAIR

¢

Removal

of

Power

Amplifier

pcb

(XO7-2180-11)

1.

Remove

the

metallic

cabinet

and

a

screw

near

the

elec-

trolytic

capacitors

C41

and

C42.

(@)

2.

Remove

the

bottom

plate

and

4

screws

retaining

the

mounting

hardware

to

the

chassis

from

the

bottom

side.

(@,

@)

3.

Unsolder

the

lead

of

the

capacitor

between

the

chassis

and

the

rear

panel.

(@,

@®)

4.

Remove

5

screws

retaining

the

rear

panel

to

the

chassis.

(©)

|

5.

The

power

amplifier

pcb,

with

the

rear

panel

and

mounting

hardwares,

can

be

separated

from

the

rest.

This

allows

the

components

to

be

replaced

easily.

()

BLOCK

&

LEVEL

DIAGRAM/CIRCUIT

DESCRIPTION

BLOCK

&

LEVEL

DIAGRAM

S3(MM/MC

)

&)

2.

5mV

150mV

Q1~6,

101

S2

S!

‘

VR2

pad

eX

BALANCE

©,

S6

PHONO

(©)

x

x)

OS)

TONE

Q7~

12

i

POWER

VOLUME

150mvV

SUPPLY

VRi

cO

(O™

:

LOUDNESS

VR4

—-VR3

SS

TREBLE

BASS

TUNER

(©)

AUX

©)

REL

©)

X14-

1640,

XO7-2180-11

S}

TAPE

A

|

SPEAKERS

PLAY

©)

OA

SPEAKER

|

:

|

REC

(©)

|

TAPE

B

l

PHONES

PLaY

©)

|

GND

¢

PROTECTION

F—-

—

=

Qi9~27,

ICI

ouT

©)

ADAPTOR

N

©)

CIRCUIT

DESCRIPTION

Fat.2

|

Compensating

temperature,

|

SAG

MOM

ce

ee

ce

te

Cee

TN

ne

a

ee

ce

em

Ne

i

ee

rick

——«d

Equalizeramp

|

rica

sf

Toneamp

ai~4

__|

Equalizer

input

differenti

amp

|

SA

[an

for

constant

current

ca

(=a!

equalizer

amp

ee

Fe)

power

supply

for

equalizer

amp

Setting

—B

to

O

V

faster

than

+B

supply

for

equalizer

amp

X07-2180-11

X08-2150-01

-ADJUSTMENT/REGLAGES/ABGLEICH

ADJUSTMENT

Ne

anes

|

INPUT

OUTPUT

AMPLIFIER

ALIGNMENT

ITEM

SETTINGS

POINTS

ALIGN

FOR

FIG,

Connect

a

DC

_

1

IDLE

voltmeter

across

VOLUME:

0

YR1

(L)

22mV

(a)

CURRENT

TP13,14

(L)

VR2

(R)

TP15,16

(R)

REGLAGES

ei,

ae

REGLAGE

DE

REGLAGE

DE

REGLAGE

DE

POINS

ITEM

L*

ENTREE

LA

SORTIE

L*AMPLIFICATEUR

L*

ALIGNEMENT

ALIGNER

POUR

FIG,

1

Connecter

un

voltmétre

de

CC

sur

22mV

(a)

TP13,14.

(G)

VR2

(D)

TP15,16

(D)

COURANT

DE

POLARISATION

ABGLEICH

Line

waeenieenian

EINGANGS-

AUSGANGS-

VORSTARKER

ABGLEICH-

GEGENSTAND

EINSTELLUNG

PUNKTE

ABGLEICHEN

FUR

ABB,

Einen

Gleichspannungs-

LEERLAUFSTROM

messer

iber

VOLUME:

0

VR1

(L)

c2mV

(a)

TP13,14

(L)

VR2

(R)

|

TP15,16

(R)

;

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as

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eee

eh

PRE

AMPLIFIER

UNIT

(XO08-2150-01)

Component

side

view

BALANCE

TREBLE

AUX

Z

airQe

ep

eat

01/0

-

BOX

KN-727

KA-727

ae

aI

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soir

-

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|

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PC

BOARD

FRONT

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80x

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Q12

XOB-

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:

pesh,

LOUD.

(O)

KA-727

(K)

(1/2)

Refer

to

the

schematic

diagram

for

the

values

of

resistors

and

capacitors.

The

PC

board

drawing

is

viewing

from

the

side

easy

to

check.

STEREO

INTEGRATED

AMPLIFIER

:

<=

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|

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BASS

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VRI

VR2

VR3

VR4

R

ch

|

(MAIN

VOLUME)

(BALANCE)

(BASS)

(TREBLE)

2SA1110

2SK105

NJM2041D-D

2SC2590

2SK105A

NJM5532D

2SK163

8

2SK170

-

E

2SK301

G

Specifications

Power

Amplifier

Section

Power

Output

75

watts*

per

channel

minimum

RMS,

both

channels

driven

at

8

ohms

from

20

Hz

to

20,000

Hz

with

no

more

than

0.008%

total

harmonic

distortion.

Both

Channels

Driven

into

8

ohms

at

1

kHz

0.003%

........

80

W+

80

W

Total

Harmonic

Distortion

(20

Hz

to

20,000

Hz)

CD,

VIDEO/AUX

input

to

SPEAKER

output

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

0.008%

at

rated

power

into

8

ohms

0.006%

at

1/2

rated

power

into

8

ohms

intermodulation

Distortion

(60

Hz:7

kHz=4:1)................

0.004%

at

rated

power

into

8

ohms

Frequency

Response

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

8

Hz

to

150

kHz,

—3

dB

Input

Sensitivity/impedance

Phono

MM

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

0...

2.5

mV/47

k

ohms

Phono

MC

oo...

eee

0.2

mV/100

ohms

Tuner,

CD,

VIDEO/AUX,

Tape

...150

mV/47

k

ohms

Signal-to-Noise

Ratio

(IHF.

A)

Phono

MM

............0..

ee

87

dB

for

2.5

mV

input

Phono

MC...

oo

69

dB

for

250

pV

input

Tuner,

CD,

VIDEO/AUX,

Tape...107

dB

Maximum

input

Level

for

Phono

AIM

tec

crise

An

Quaraniteoued

200

mV

(RMS),

T.H.D.

0.008%

at

1,000

Hz

NG

2

teed

segs

astute

eae

eta

ahah

17

mV

(RMS),

T.H.D.

0.008%

at

1,000

Hz

Output

Level/impedance

Tape

REC

(Pin)

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

150

mV/330

ohms

Frequency

Response

for

Phono....RIAA

standard

curve

+0.3

dB

(30

Hz

to

20

kHz)

Tone

Control

BOSS

ons

oe

ede

+

10

dB

at

100

Hz

Treble

0.00

+

10

dB

at

10

kHz

Loudness

Control

(at

—30

dB

VOLUME

Level)

.....

+6

dB

at

100

Hz

General

Power

Consumption

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

4.0

A

(U.S.A.

and

Canada)

a8

220

W

(others)

23

W

(no

signal)

AC

Outlets...

eee

Switched

2,

Unswitched

1

(Except

.

European/Australian

countries)

Dimensions

..........

6c

W:

340

mm

(13-13/32”)

H:

109

mm

(9-7/32”)

D:

369

mm

(14-17/32")

Weight

(Net)

0.0.0.0...

8.3

kg

(18.3

Ib)

*

Measured

pursuant

to

Federal

Trade

Commission's

Trade

Regulation

rule

on

Power

Output

Claims

for

Amplifier

in

U.S.A.

Kenwood

follows

a

policy

of

continuous

advancements

in

development.

For

this

reason

specifications

may

be

changed

without

notice.

Kenwood

poursuit

une

politique

de

progrés

constants

en

ce

qui

doncerne

le

développement.

Pour

cette

raison,

les

spécifications

sont

sujettes

a

Modifications

sans

préavis.

Kenwood

strebt

standige,

Verbesserungen

in

der

Ent-

wicklung

an.

Daher

bleiben

Anderungen

der

technischen

Daten

jederzeit

vorbehalten.

DC

voltages

are

as

measured

with

a

high

impedance

voltmeter

with

no

signal

input.

Values

may

vary

slightly

due

to

variations

between

individual

instru-

ments

or/and

units.

KA-727

PC

BOARD

MAIN

AMPLIFIER

UNIT

(X07-2180-11)

Component

side

view

(a)

IDEL

CURRENT

ADJ.

DC

voltmeter

ed

Lch

SPEAKER

Roh

3

shi

Q11,12/015,16

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ADJ.

DC

voltmeter

46.4

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~

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ol

olola

3

a

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MODULATION

UNIT

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Component

side

view

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KA-727

(K)

(2/2)

<>

Refer

to

the

schematic

diagram

for

the

values

of

resistors

and

capacitors,

The

PC

board

drawing

is

viewing

from

the

side

easy

to

check.

FRONT

KENWOOD

STEREO

INTEGRATED

AMPLIFIER

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2SC2591

2SC2581

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For

continued

safety,

replace

safety

critical

components

only

with

manufacturer’s

recommended

parts

(refer

to

parts

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2SA733

(A)

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2SC2167

safety

critical

components.

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reduce

the

risk

of

electric

shock,

leakage-current

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resistance

measurements

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be

carried

out

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parts

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7

pte

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€

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the

supply

circuit)

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not

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without

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No.

are

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articles

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geliefert.

Ref.

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MR)

F

Address

|New

Parts

No.

PARTS

Bm

&

F

LIST

Description

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B46-0093-03

B46-0094-03

B46-0095-03

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BS0-5180-00

RS0-5181-00

RS0-5182-00

RSO-5183-00

BSB-O222-14

BSB-O0223-04

RSB-O245-23

R5B-0269-04

BS9-00972-00

C91-0023-035

291-064?-05

FO3-0061-05

E03-0061-05

E13-0225-05

F30-0181-05

E30-0580-05

E30-0685-05

E30-0780-05

E30-1341-05

F19-0295-04

GO1--0489-04

G01-1452-04

HO1-S185-04

H1O-1?25-13

H10-1731-02

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78-04

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J61-0307-05

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78-03

K2?-1179-03

K2?-1180-03

K2?-1181-04

K2?r-1207-04

K2?-1248-13

K29-1548-04

E:

Scandinavia

&

Europe

H:Audio

Club

K:USA

S:

South

Africa

UE

:

AAFES(Europe)

T:

England

U:

PX(Far

East,

Hawaii)

X:

Australia

M:

Other

Areas

METALLIC

CABINET

FANEL

ASSY

WARRANTY

CARD

K:

WARRANTY

CARD

P

WARRANTY

CARD

UUE

|

WARRANTY

CARD

WUE

WARRANTY

CARD

X

WARRANTY

CARD

E

INSTRUCTION

MANUAL

(ENGLISH)

INSTRUCTION

MANUAL

(FRENCH)

PMXE

INSTRUCTION

MANUAL

(G>D>I)

E

INSTRUCTION

MANUAL

(SPANISH)

M

CAUTION

CARD

(PRESET

220V)

UE

CAUTION

CARD

(PRESET

120¥)

U

CAUTION

CARD

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CAUTION

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TAN)

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Ref.

No.

SRE

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*

New

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without

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No.

are

not

supplied.

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articles

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mentionnes

dans

le

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ne

sont

pas

fournis.

Teile

ohne

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No.

werden

nicht

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Address

|New

Parts

No.

irs

fi if

an

+

PARTS

LIST

K29-1349-04

K29-1550-04

|

£01-3646-05

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¢|

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&

Europe

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K:

USA

S:

South

Africa

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:

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articles

non

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dans

le

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ne

sont

pas

fournis.

Teile

ohne

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No.

werden

nicht

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No.

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No.

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0

|

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E:

Scandinavia

&

Europe

H:Audio

Club

K:USA

S:

South

Africa

T:England

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PX(Far

East,

Hawaii)

UE:

AAFES(Europe)

X:

Australia

M:

Other

Areas

Description

Bm

&

YM

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(SEMK8)

250

TSA

|

XE

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PARTS

Parts

without

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No.

are

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i

es

articles

non

mentionnes

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le

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ne

sont

pas

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ohne

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No.

werden

nicht

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No.

SREFES

|

Address

|New

Parts

No.

Si

cm

£#

3

Parts

2SC25B810Y)

2SA1L1106(9).

~

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2502320

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25I-2631

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Rs)

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I

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TRANS

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TRANS

ISTSR

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AMPLIFIER

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LF9SFVIHIO4S

MF

DB.

1OUF

J

mS?

398

CK45F

RB

LHS61K

CERAMIC

SO60FF

Kk.

59

+60

Cr45FSLIHIS1I

CERAMIC

LSOPF

J

C61

-64

CEB4FWiHO)

OME

ELECTRA

1.

QUF

OOWYV

IL6¢

ITK45FF

1HLO3Z

CERAMIC

0.

OLUF

Zz

Ed

F13-0624-05

PHONES

JACK

(6P)

PHANG.

CD,

TUNER

Fe

|

*

|

£13-0818-05

PHENS

JACK

(8FP}

TAPE

A/B

ES

£13-0496-05

FHONS

JACK

(4F)

ADAPTER

Ll

ose

t.40-1011-43

SMALL

FIXED

INDUCT&R(100UH:k)

L3

34

L33-0275-035

CHOKE

CBIL

R25

+26

RNL4DK2E

7

S3J

RN

Tok.

J

1/4W

R27

»

28

RNI4DK2E

3047

RN

300K

J

1/4W

R29

+30

:

RNL4DK2E49916

RN

4.

99K.

G

1/4W

URI

2B

RO6-5099-05

PATENT

IOMETER(

100K

X2)

VOLUME

VRC

1B

*|

RO6-Si25-05

PATENT

TOMETER

(200K

X2

)

BALANCE

VRS

24

1B

*

|

RO6-3042-05

PQTENTISMETER(1OKX2)

BASS:

TREB

E:

Scandinavia

&

Europe

H:Audio

Club

K:

USA

S:

South

Africa

T:England

_-U:

PX(Far

East,

Hawai)

VE

:

AAFES(Europe)

X:

Australia

MM:

Other

Areas

P:

Canada

A\,

indicates

safety

critical

components.

*

New

Parts

without

Parts

No.

are

not

supplied.

Les

articles

non

mentionnes

dans

le

Parts

No.

ne

sont

pas

fournis.

Teite

ohne

Parts

No.

werden

nicht

geliefert.

Address

iNew

Parts

iF

Boa

&

F

Bm

B/S

Ref.

No.

Parts

No.

Description

370-0070-05

SLIDE

SWITCH

TAPE

MS&NTITS&R

$42-4038-05

FUSH

SWITCH(4KEY)

INPUT

SELECT

340~6025-05

PUSH

SWITCH

CARTRIDGE

MM/MC

540-4045-05

PUSH

SWITCH

MUTING

540-2122-05

PUSH

SW

LS8UDNESS:

TRNE

NN/®FF

RD2OI

(Be)

ZENER

DIADE

NJMSS32D

Ife

RP

AMP

NJIM2041D-D

TL

RF

AMP

2ok.1?7O(BL:¥V)

Fed

25K

105

(H)

FET

2SC2590(R:S)}

TRANSISTOR

SSA1110(R+S)

TRANS

ISTAR

25k.105

(0H)

FET

25K

1IDSAZ)

PET

Zak.

301

Ct!)

FET

25K

163

(0MsN)

PEA

S301

(5)

FET

MODULATION

(X14-1640-00)

MEO4FWIViOOMEL

ELECTRA

LOUF

155176

DISDE

»10

>|

E-202

CANSTANT

CURRENT

DIADE

4

2S

IB45(F

sE)

TRANSISTOR

~Q

~—2SAT3SCA)

CLIP)

TRANSISTAR

~14

25945

(A)

(its

F)

TRANS

ISTAR

HiS

»16

Me632(0.R:5)

TRANS

ISTAR

Q17

.18

DS

aeaie.

F

}

TRANSISTOR

W119

»20

25AL1Z4A

Cds

RS)

TRANSISTOR

E:

Scandinavia

&

Europe

H:Audio

Club

K:

USA

P:

Canada

S:

South

Africa

T:England

-U:

PX(Far

East,

Hawait)

UE

:

AAFES(Europe)

X:

Australia

M:

Other

Areas

-

A

indicates

safety

critical

components.

Note:

Component

and

circuitry

are

subject

to

modification

to

insure

best

operation

under

differing

local

conditions.

This

manual

is

based

on,

the

U.S.

(K)

standard,

and

provides

information

on

regional

circuit

modification

through

use

of

alternate

schematic

diagrams,

and

information

on

regional

component

variations

through

use

of

parts

list.

TRIO-KENWOOD

CORPORATION

Shionogi

Shibuya

Building,

17-5,

2-chome

Shibuya,

Shibuya-ku,

Tokyo

150,

Japan

KENWOOD

ELECTRONICS

1315

—.

Watsoncenter

Rd,

Carson,

California

90745:

75

Seaview

Drive,

Secaucus,

New

Jersey

07094,

U.S.A.

TRIO-KENWOOD

CANADA

INC.

1070

Jayson

Court,

Mississauga,

Ontario,

Canada

L4W

2V5

TRIO-KENWOOD

ELECTRONICS,

N.V.

Leuvensesteenweg

504

B-1930

Zaventem,

Belgium

.

TRIO-KENWOOD

ELECTRONICS

GmbH

Rudolf-Brass-Str.

20,

6056

Heusenstamm,

West

BeImeny

TRIO-KENWOOD

FRANCE

S.A.

5,

Boulevard

Ney,

75018

Paris,

France

TRIO-KENWOOD

(AUSTRALIA)

PTY.

LTD.

tncorPorATED

IN

NSW)

4E

Woodcock

Place,

Lane

Cove,

N.S.W.

2066,

Australia

KENWOOD

&

LEE

ELECTRONICS,

LTD.

Wang

Kee

Building,

Sth

Floor,

34-37,

Connaught

Road,

Central,

Hong

Kong

©

1984-5

PRINTED

IN

JAPAN

B51-1617-10

(T)

2575

Kenwood KA-727 User manual

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