Harman Kardon AVR20MKII Manual de usuario

The

Harman

Kardon

Model

AVR20MKII

AUDIO

AND

VIDEO

RECEIVER

ysechnical

Manua

harman/kardon

AVR

2011

9

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CONTENTS

&

SPECIFICATIONS

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LEAKAGE

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DIAGRAM

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ELECTRICAL

PARTS

LIST

«+++++++++++

23

CONTROLS

AND

FUNCTIONS

--

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FUNCTIONAL

BLOCK

DIAGRAM

28

DISASSEMBLY

PROCEDURES

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DIAGRAMS

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ALIGNMENT

PROCEDURES

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SCHEMATIC

DIAGRAMS

(II)

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37

harman/kardon

Parts

and

Service

Office

80

Crossways

Park

West,

Woodbury,

N.Y,

11797

1112-AVR20MKII

G9604

1200

Printed

in

Korea

SPECIFICATIONS

@

RMS

Output

Power

(STERE

MODE),

Input:

CD

THD:

0.09%,

8

chms

Both

Channel

Driven

(40

Hz

-

10

kHz)

(SURROUND

MODE)

THD;

0.09%,

8

ahms,

1

kHz

THD

(40

Hz

-

10

kHz)

at

63

W,

8

ohms,

Input:

CD

26S

WwW

2ShW

40

kHz

50.06%

4

kHz

0.06%

10

kHz

<0.06%

IM

Distortion

at

63

W,

8

ohms,

Input:

CD

60:7000

Hz

=

4:1

0.2%

input

Sensitivity

PHONO

(MM)

2.5

mv

CD,

AUX,

VCR

150

mV

S/N

Ratio

Input

Shorted

at

Volume

Max.

(WTD

IHF-A)

PHONO

274

dB

CD,

TAPE

1,2

292

dB

TV,

VCR1,2

282

dB

Phono

Overload

at

1

kHz,

THD:

0.5%

Phono

input—-

Tape

Output

>

140

mv

Phono

Equalization

(RIAA

30

Hz

-

18

kHz)

Tape

Monitor

Output

RIAA

Tone

Control

Bass;

100

Hz

+10dB

-10dB

Treble:

10

kHz

+10

dB

-10dB

Loudness

Contour

at

-40

dB

100

Hz

+6

dB

10

kHz

+3

dB

Frequency

Response

(CD/AUX)

20

Hz,

20

kHz

+

0.5

dB

Channel

Crosstalk

Input

Shorted

1

kHz

2

60

dB

10

kHz

250

dB

263Ww

250W

0.09%

<0,09%

50,3%

2.5+0.4

mV

150

4

30

mV

270

dB

290

dB

280

dB

2130

mV

RIAA

4

1.5

dB

+1042.0

dB

-10

42,0

dB

+104

2.0

dB

-10

42.0

4B

+64

2.0

dB

+3420

dB

+108

2

50

dB

>

40

dB

RMS

Output

Power

THD

(0.3%,

8

ohms,

1

kHz)

Only

Center

Channel

Driven

255

W

S/N

Ratio

(Input

Level:

350

mV)

Input

Shorted,

IHF-A

WTD

2

67

dB

Frequency

Response

at

-3

dB

Normal

Wide

20

Hz

-

20

kHz

BE

Nominal

RMS

Output

Power

THD

(0.7%,

8

ohms,

1

kHz)

Only

Rear

Channel

Driven

2S55W

S/N

Ratio

(Input

Shorted,

IHF-A

WTD)

Delay:

20

ms,

Input

Level:

350

mV

Dolby

>»

60dB

Hall

=

60

dB

Frequency

Response

at

-3

dB

8

ohms,

Dolby

Pro-Logic

80

Hz

-

7

kHz

250W

265

dB

100

Hz

-

20

kHz

150

Hz

-

15

kHz

50

Hz

-

15

kHz

Limit

2S0W

265

dB

255

dB

100

Hz

-

6

kHz

Nominal

Input

Sensitivity/Impedance

VCR1, VCR2,

VDP

1

Vpp/75

Output

Level/Impedance

VCR1,

REC

out,

TV

Monitor

out

1Vep/75

O

Frequency

Response

at

-3

dB

DC-10

MHz

Crosstalk

at

1.0

MHz 245

dB

Limit

+1

0B

+106

5-6

MHZ

240

dB

Tuning

Gover

Range

USA/Canada:

75

kHz

DIV.

Europe:

40

kHz

DIV.

Usable

Sensitivity

(75

ohms

Input)

USA/Canada:

30

dB

S/N

Europe:

26

dB

S/N

Image

Rejection

(at

106

MHz)

USA/Canada

Europe

IF

Rejection

(at

99

MHz)

Full

Limiting

(at

-3

dB)

87.5

-

107.9

MHz

87.5

-

108.0

MHz

50

dB

Quieting

Sensitivity

(at

98.1

MHz,

100%

MOD.)

IHF

Band Pass

Fitter

Mono

Stereo:

USA/Canada

Europe

Distortion

(1

kHz,

190%

MOD.

at

98.1

MHz)

IHF

Band

Pass

Filter

Mono.

Stereo

S/N

Ratio

(1

mV

input,

106%

MOD,

at

98.1

MHz)

IHF

Band

Pass

Filter

Mono

Stereo

Frequency

Response

(at

+1

dB,

-3

dB)

20H2-15.5kHz

30

Hz

-

15

kHz

11.2

dbf

17.2

dbf

2

45

dB

235

dB

2

100

dB

290

dB

2110

dB

2100

dB

12.2

dbf

$15.2

dbf

17.2

dbf

$23.2

dbf

40.2

dbf

43,3

dbf

45.3

dbf

<48,3

dbf

0.2%

505%

0.4%

<0,7%

270dB

265

dB

265dB

260

dB

AM

Rejection

Ratio

(100

uV

-

20

mV

Input)

260

dB

2

50

dB

Search

Level

(at

98.1

MHz)

31.2

dbf

31.245

dbf

Automatic

Stereo

Threshold

(at

98.1

MHz)

31.2

dbf

31.245

dbf

Muting

Threshald

(at

98.1

MHz)

31.2

dbf

31.245

dbf

Overload

at

98.1

MHz

(100%

MOD.

100

mV

RF

Input)

50.2%

50.5%

Suprious

Response

(at

98.1

MHz)

Antenna

Input

3

uv

270

dB

2

60

dB

Capture

Ratio

at

40/60

dbf

s2qdB

$2.5

dB

Alternative

Channel

Selectivity

(at

98.1

MHz

+

400

kHz)

=

65

dB

255dB

Stereo

Separation

(at

98.1

MHz,

100%

MOD.,

1

mV

Input)

IHF

Band

Pass

Filter

100

Hz

240dB

235

dB

1

kHz

2

45

dB

240dB

10

kHz

235

dB

2

30dB

Output

Voltage

(at

100%

MOD.,

1

kHz

Input)

Mono

500

mV

S00

+

150

mV

Stereo

450

mV

450

4+

150

mV

Tuning

Cover

Range

USA/Canada:

10

kHz

Step

Europe;

9

kHz

Step

Nominal

imit

$20

-

1710

kHz

$22

-

11614

kHz

Usable

Sensitivity

(400

Hz,

30%

MOD.,

S/N

20

dB)

Image

Rejection

(at

1400

kHz)

IF

Rejection

(at

600

kHz)

AGC

Figure

of

Merit

(From

100

mV/m

at

1000

kHz)

Distortion

(400

Hz,

30%

MOD.

5

mV/m

Input)

IF

Bandwidth

(6

dB

Down,

350

uV/m)

Audio

Response

(5

mV/m

Input

1

kHz

0

dB,

1000

kHz)

at -6

dB

Selectivity

(at

350

uV/m)

+10

kHz

S/N

Ratio

(1000

kHz,

With

Antenna

Input

5

mV/m)

<500

uVim

1000

uVim

235

dB

=

30

dB

260

dB

250

dB

250

dB

245dB

08%

S15%

6

kHz

4-11

kHz

80Hz-2.3kHz

100

Hz

-

2

kHz

235

dB

225

dB

245

dB

=

40dB

RF

Overload

(400

Hz

80%

MOD,

100

mV/m

Input)

<5%

10%

Search

Level

(at

1000

kHz)

800

uV

800

uV+6

dB

Output

Voltage

(400

Hz

30%

MOD.,

5

mV/m

Input)

165

mV

165

440

mV

Whistle

10%

=

15%

USA/Canada

180

W

Europe

500

W

Power

Supplies;

USA/Canada

AC

120

V,

60

Hz

Europe

AG

230

V,

50

Hz

Dimensions

(Wx

H

xD};

inches

178

x

6M

x

1617

mm

440

x

155

x

420

Weight

(lbs/kgs)

26,9/12.2

These

specifications

are

service

target

specs.

Specifications

and

components

are

subject

to

change

without

notice.

Overall

performance

will

be

maintained

or

improved.

LEAKAGE

TEST

Before

returning

the

unit

to

the

user,

perform

the

following

safety

checks:

1

Inspect

all

lead

dress

to

makes

certain

that

leads

are

not

pinched

or

that

hardware

is

not

lodged

between

the

chassis

and

other

metallic

parts

in

the

unit.

.

Be

sure

that

any

protective

devices

such

as

nonmetallic

control

knobs,

insulating

fishpapers,

cabinet

backs,

adjustment

and

compartment

covers

or

shields,

isolation

resistor-capacity

networks,

mechanical

insulators,

etc.

Which

were

removed

for

servicing

are

properly

reinstalled.

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

power

cord

directly

into

a

230-voit

AC

receptacle

(do

not

use

an

Isolation

Transformer

for

this

test).

Using

two

clip

leads,

connects

a

1500

Ohm,

10-watt

resistor

paralleled

by

a

0.15pF

capacitor,

in

series

with

ail

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

voit,

or

higher

sensitivity

to

measure

the

AC

voltage

drop

across

the

resistor.

(See

Diagram.)

Move

the

resistor

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.)

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.

SIMPSON

MODEL

229

ETC,

FOR

LEAKAGE

TEST

(

‘

)

TO AC

GROUND

SUCH

METAL

SURFACE

OF

AS

WATER

PIPE

BX

CABLE

UNITUNDER

Test

=

HGH

GROUND

—

CONDUIT

ETC.

TO

EACH

EXPOSED

OLTAGE

OR

+

LEAD

TEST

PROBE

TO

EXPOSED

METALLIC

PARTS

LEAD

CONNECT

TO

KNOWN

EARTH

GROUND

BLOCK

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1.

POWER

BUTTON

li

To

use

headphones

for

private

5.

TREBLE

CONTROL

8.

DELAY

TIM

Press

this

button

to

turn

the

power

on.

listening

or

monitoring,

leave

both

Modifies

the

high-frequency

sound

of

Adjusts

time

delay

Press

again

to

turn

the

power

off.

It

can

1

and

2

switches

pushed

out.

the

left

and

right

channels

as

much

as

rear

channels,

ope

also

be

used

as

a

system

power

button,

OTE:

if

both

kK

itch

+/-

10dB.

Set

this

control

at

a

suitable

surround

made

is

if

you

connect

the

other

components

to

NOTE:

AE

DOE

L

Sportal

Swrenes.ale

position

for

your

taste

and

room

button

on

page

16

the

switched

outlets.

pushed

icand

Only-one.

set

of

a

acoustics.

.

speakers

is

connected

to

the

receiver,

Adjusts

the

surrou

NOTE:

in

POWER

OFF

state,

the

no

sound

will

be

heard.

steps.

For

Dolby

POWER

indicator

will

light

up

orange

6.

BALANCE

CONTROL

standard.

and

power

is

partially

supplied

to

the

3.

HEADPHONE

JACK

This

control

is

used

for

balancing

the

ar

is

infrared

remote

control

receiver

and

Stereo

headphones

can

be

piugged

relative

sound

volume

of

the

left

and

mS

ee!

the

memory

circuitry.

into

this

jack

for

private

listening.

right

channel

speakers.

Clockwise

Headphone

impedance

should

be

rotation

reduces

the

volume

from

the

between

8

and

2K

ohms.

Best

results

left

speaker,

counterclockwise

rotation

z

12

SPEAKER

SWITCHES

between

200 and

400

ohms.

reduces

the

volume

from

the

right

9.

PRO

LOGI

ese

switches

allow

you

to

select

Press

this

button

f

various

combinations

of

speakers

as

speaker.

follows;

4.

BASS

CONTROL

10.

3

CHANN

I

To

drive

1

pair

of

speakers,

push

Modifies

the

low-frequency

sound

of

7.

SURROUND-OFF

MODE

The.

channel

mo

only

the

speaker

1:

switch

in

the

left

and

right

channels

as

much

as

SELECTOR

when

rear

speake

:

+/-

10dB.

Set

this

control

at

a

suitable

Press

this

switch

to

select

normal

to

provide

a

cente

™@

To

drive

a

second

pair

of

speakers,

position

for

your

taste

and

room

stereo

mode.

push

only

the

speaker

2

switch

in.

acoustics.

lf

To

drive

both

pairs

of

speakers,

push

both

1

and

2

switches

in.

OOO®

O@

7

tuning

&

AM

FM

Mone

Search

i

Treble

Volume

Loudness

e)

Balance

ia

sees

je

)

@®

IL

y

sound

of

as

much

as

ata

suitable

room

lOL

lancing

the

re

left

and

lockwise

e

from

the

‘ise

rotation

he

right

VIODE.

normal

©

@)

8.

DELAY

TIME

Adjusts

time

delay

between

front

and

tear

channels,

operates

only

when

the

surround

mode

is

on.

(see

Delay

Time

button

on

page

16).

Adjusts

the

surround

delay

time

in

steps.

For

Dolby

Surround

20ms

is

standard.

eal

Sav

eee

9.

PRO

LOGIC

MODE

Press

this

button

for

Pro-Logic

mode.

10.

3

CHANNEL

MODE

The

3

channel

mode

can

be

used

when

rear

speakers

are

not

being

used

to

provide

a

center

(dialog)

channel.

11.

STADIUM/THEATER

MODE

Switches

for

selecting

desired

surround

mode;

Stadium

or

Theater.

See

Surround

Sound

Effects

on

page

13.

12.

CENTER

MODE

SELECTOR

This

button

operates

only

in

DOLBY

PRO-LOGIC

and

DOLBY

3

STEREO

mode.

The

made

changes

as

below,

when

the

button

is

pressed

in

succession.

DOLBY

PRO-LOGIC

MODE

[

NORM

—

WIDE

—

PHANTOM

1

DOLBY

3

STEREO

MODE

i

NORM

—>

WIDE

71

The

display

window

shows

each

mode.

NORM:

Select

this

mode

if

you

use

a

small

center

speaker.

The

bass

sound

of

the

center

channel

is

reproduced

from

the

front

speakers,

because

the

smalt

speaker

cannot

produce

enough

bass.

WIDE:

Select

this

mode

if

you

use

a

medium-to-large

center

speaker.

The

bass

sound

is

reproduced

from

the

center

speaker.

PHANTOM:

Select

this

mode

if

you

don’t

use

a

center

speaker.

The

center

speaker's

sound

is

reproduced

from

the

front

speakers.

13.

TEST

TONE

BUTTON

This

button

operates

only

in

DOLBY

PRO-LOGIC

and

DOLBY

3

STEREO

mode.

When

the

button

is

pressed,

2

seconds

of

test

tone

is

generated

in

all

channels

(Left,

Center,

Right,

and

Rear)

in

succession.

The

display

window

shows

TEST

Left,

Center,

Right,

and

Rear

in

succession

(in

DOLBY

PRO-LOGIC

mode)

or

Left

Center

or

Right

{in

DOLBY

3

STEREO

mode)

in

succession.

Use

this

button

to

test

speaker

connections.

14.

SOURCE/DIRECT

BUTTON

This

feature

bypasses

the

tone

control

circuitry,

resulting

in

flatter

frequency

response

and

wider

bandwidth.

When

it

is

activated,

“DIRECT”

illuminates

in

the

dispiay.

15.

PRESET

SCAN

BUTTON

Press

this

button

to

scan

the

preset

station

frequencies.

The

receiver

stops

at

each

preset

location

that

contains

a

frequency

for

about

4

seconds,

so

you

can

hear

a

station.

The

preset

location

indicator

blinks

4

times.

Press

this

button

again

to

stap

scanning.

16.

SEARCH

SELECTOR

Press

this

button

to

select

AUTO

or

MANUAL

tuning.

@

In

AUTO

made,

scanning

is

automatically

continued

up

or

down

until

the

is

picked

up

by

pressing

the

UP/DOWN

tuning

buttons.

The

display

window

shows

‘AUTO’.

Use

this

mode

to

quickly

find

strong

AM

or

FM

stations.

—™@

in

MANUAL

mode,

the

frequency

is

changed

by

a

step

with

the

UP/DOWN

button.

If

you

keep

pressing

the

UP/DOWN

tuning

buttons,

scanning

is

continued

until

the

button

is

released.

NOTE:

Tuning

Intervals:

FM

=

50

KHz

AM

10

KHz

17.

FM

MODE

BUTTON

Press

this

button

to

select

stereo

or

mono

mode.

M™@

STEREO:

Provides

stereophonic

reception

of

an

FM

stereo

broadcast.

The

display

window

shows

‘FMST’.

@

MONO:

The

left

and

right

channel

signals

detected

from

an

FM

stereo

broadcast

are

mixed

and

reproduced

through

both

channels.

If

you

want

to

find

a

weak

FM

station,

select

this

mode.

18.

STATION

MEMORY

BUTTON

Use

this

button

to

store

an

AM

or

FM

frequency.

Press

this

button

and

select

one

of

30

preset

locations

to

store

the

frequency

with

the

STATION

PRESET

buttons

while

the

memory

indicator,

‘MEMORY’

blinks.

NOTE:

When

you

store

a

frequency

in

a

memory

location

that

already

contains

a

frequency,

you

replace

the

previous frequency.

If

your

receiver

is

disconnected

from

AC

power

for

more

than

about

10

days,

it

loses

all

stored

frequencies.

19.

UP/DOWN

TUNING

BUTTONS

Press

the

DOWN

button

(

v

)

to

tune

in

lower

frequency

stations,

the

UP

button

(4)

to

tune

in

higher

frequency

stations.

If

you

press

the

DOWN

button

when

the

display

is

at

the

bottom

of

the

frequency

range,

the

display

returns

to

the

top

of

the

range.

If

you

press

the

UP

button

when

the

display

is

at

the

top

of

the

frequency

range,

the

display

returns

to

the

bottom

of

the

range.

When

the

receiver

finds

a

strong

frequency,

the

display

window

shows

‘TUNED’.

20,

FM/AM

BAND

SELECTOR

Press

these

buttons

to

select

the

FM

or

AM

radio

band.

When

you

select

the

AM

or

FM

radio

band,

the

receiver

displays

the

last

frequency

selected

on

that

band.

21.

STATION

PRESET

BUTTONS

Select

one

of

30

preset

locations

to

recall

the

station

stored

in

memory.

The

input

function

is

automatically

changed

to

TUNER

when

the

button

is

pressed.

When

you

select

numbers

from

10

through

29,

you

must

select

the

second

digit

within

about

2

seconds.

To

select

preset

30,

simply

press

“O".

22,

TAPE

2

MONITOR

BUTTON

Set

TAPE

2

MONITOR

to

the

“off”

position

when

you

want

to

hear

the

other

input

functions.

Press

this

button

to

monitor

the

cassette

deck

connected

to

the

TAPE

2

MON

input

jacks.

23.

INPUT

FUNCTION

SELECTOR

Press

the

button

to

select

the

desired

input

function:

VCR

1,

VCR

2,

VDP,

TAPE

1,

TV/Aux,

Tuner,

CD

or

Phono.

To

dub

from

VCR

2

to

VCR

1,

press

the

VCR

2

button

and

then

press

the

VCR

1

REC

button.

For

the

input

function

of

VCR

1

press

the

VCR

2

button

and

VCR1

DUBBING

button.

Set

the

recording

VCR

(VCR

1)

to

recording

mode.

Set

the

playback

VCR

(VCR

2)

to

play

a

tape.

Dubbing

will

start.

M@

To

hear

another

input

source

during

video

tape

dubbing:

Press

the

input

function

you

want

to

hear,

and

play

the

input

source.

NOTE:

If

you

press

the

TEST

TONE

button

during

VCR

1

DUBBING,

the

audio

signal

is

not

recorded.

24.

VCR

2

SELECTOR

Push

in

this

button

to

select

the

VCR

2

jacks

on

the

front,

rather

than

the

VCR

2

jacks

on

the

rear.

DISASSEMBLY

PROCEDURES

REFER

TO

PAGE

21

and

33.

1]

COVER

TOP

REMVOAL

Cover

Top

(51).

Cover

Bottom

(29).

Remove

8

screws

{A)

and

then

remove

the

2]

COVER

BOTTOM

REMOVAL

Remove

10

screws

(B)

and

then

remove

the

4]

VOLUME

P.C.Board

(PCB9)

REMOVAL

AVR20MKII

25.

VCR

2/CAMCORDER

INPUT

JACKS

VIDEO

IN:

Connect

to

the

VIDEO

OUTPUT

jack

of

a

VCR

(yellow

jack).

AUDIO

IN:

Connect

to

the

AUDIO

OUTPUT

jacks

of

a

VCR

(red

and

white

jacks).

26.

LOUDNESS

BUTTON

Press

this

button

to

compensate

for

the

response

of

the

human

ear

at

low

listening

levels

(known

as

the

Fletcher-Munson

hearing

curve).

The

high

and

low

frequencies

are

automatically

boosted

when

this

button

is

pushed

in.

In

the

OFF

position,

the

frequency

response

Is

flat

at

all

volume

levels.

This

button

does

not

work

at

high

volume

levels.

27,

VOLUME

CONTROL

Turn

the

VOLUME

clockwise

to

increase

the

volume

and

counterclockwise

to

decrease

it.

The

volume

of

the

front,

center,

and

rear

channels

is

changed

at

the

same

time.

28,

VOLUME

LEVEL

INDICATOR

This

indicator

moves

in

accordance

with

the

volume

level,

The

indicator

blinks

when

the

mute

button

on

the

remote

commander

is

pressed.

29.

DISPLAY

WINDOW

This

window

shows

the

state

of

operation

for

easier

control

of

the

receiver.

It

also

contains

the

IR

Remote

Sensor.

5.

Disconnet

(CP701

and

CP7Q2)

from

the

Input

P.C.Board

(PCB9).

6.

Disconnect

(CP703)

from

the

Video

P.C.Board

(PCB2).

7.

Remove

8

screws

(C)

and

then

remove

the

Front

Panel

Assembly

(AA).

3]

FRONT

PANEL

ASSEMBLY

REMOVAL

1.

Remove

the

Cover

Top

(51),

refering

to

the

[I].

.

Pull

out

the

Volume

Knob

(1)

with

Volume

LED

P.C.Board

(PCB8).

.

Disconnect

(CP102

and

CP503)

from

the

Volume

P.C.Board

(PCB6).

.

Remove

the

Hex

Nut

fram

the

Volume-

motor

to

remove

the

Volume

P.C.Board

1,

Remove

the

Cover

Top

(51),

referring

to

the

2

[1].

3

2.

Remove

the

flat

cable

from

wafer

(CP401)

on

the

Volume

P.C.Board

(PCB9).

4

3.Disconnet

(CP102)

from

the

Volume

P.C.Board

(PCB6).

4.

Disconnect

(CNT602)

from

the

Surround

5

P.C.Board

(PCB11).

.

Remove

3

screws

(M)

and

then

remove

the

Volume

P.C.Board

(PCB6).

AVR20MKIT

SPEAKER

SEL.

P.C.Board

(PCB7)

REMOVAL

.

Remove

the

Cover

Top

(51),

refering

to

the

[1].

Remove

the

Front

Pane!

Assembly

{AA),

refering

to

the

[3).

Remove

4

screws

(D)

and

then

remove

the

Sperker

Sel.

P.C.Board

(PCB7).

=

S

wo

TONE

P.C.Board

(PCB5)

REMOVAL

.

Remove

the

Cover

Top(51),

refering

to

the

Remove

the

Front

Panel

Assembly

(AA),

refering

to

the

[3}.

Pull

the

Bass,

Treble,

Balance

Knobs

(3).

Remove

the

Hex

Nuts

from

the

variable

resistors

(17,

18).

5.Remove

3

screws

(E)

and

then

Tone

P.C.Board

(PCBS).

a

N

a

FRONT

P.C.Board

(PCB4)

REMOVAL

1.

Remove

the

Cover

Top

(51),

refering

to

the

2,Remove

the

Front

Panel

Assembly

(AA),

refering

to

the

[3].

3.

Remove

9

screws

(F)

and

then

remove

the

Front

P.C.Board

(PCB4).

[8]

TUNER

P.C.Board

(PCB10)

REMOVAL

1.

Remove

the

Cover

Top

(51),

refering

to

the

[1].

2.

Remove

3

screws

(G)

and

then

remove

the

Tuner

P.C.Board

(PCB10).

[7]

SURROUND

P.C.Board

(PCB11)

REMOVAL

1.

Remove

the

Cover

Top

(51),

referring

to

the

2.

Disconnect

(CNT602)

from

the

Surround

P.C.Board

(PCB11).

3.

Remove

2

screws

(H)

and

then

remove

the

Surround

P.C.Board

(PCB11).

VIDEO

P.C.Board

(PCB2)

REMOVAL

.

Remove

the

Cover

Top

(51),

refering

to

the

[I].

.

Remove

the

Surround

P.C.Board

(PCB11),

refering

to

the

[9].

.

Disconnect

(PC703,

CP101

and

CN301)

from

the

Video

P.C.Board

(PCB2).

.

Disconnect

(CP902)

from

the

Sub-Woofer

P.C.Board

(PCB3).

.

Disconnect

(CP301}

from

the

Main

P.C.Board

(PCB1).

Remove

5

screws

(I)

and

then

remove

the

Video

P.C.Board

(PCB2).

No

w

4

oOo

>

SURROUND

P.C.Board

(PCB3)

REMOVAL

1.

Remove

the

Cover

Top

(51),

refering

to

the

[1].

2.

Disconnect

(CP902

and

CP110)

from

the

Sub-Woofer

P.C.Board

(PCB3).

3.

Remove

4

Screws

(K)

and

then

remove

the

Sub-Woofer

P.C.Board

(PCB3).

CHASSIS

BACK

REMOVAL

1.

Remove

the

Cover

Top

(51),

refering

to

the

[1].

2.

Do

Steps

[2],

[8],

[9],

10]

and

{Il.

3.

Remove

15

screws

(J)

and

then

remove

the

Chassis

Back

(34).

13

MAIN

P.C.Board

(PCB1)

REMOVAL

1,

Remove

the

Cover

Top

(51

[1].

2.

Do

Steps

[2],

[4],

(8),

[9]

and

(2).

.

Unsolder

all

leads

of

(Q116,

Q112, 0115,

Q123,

Q126

and

Q127)

from

copper

track

on

the

Input

P.C.Board

(PCB9).

4,

Disconnect

(CP103,

CP109

and

CP206)

from

the

Main

P.C.Board

(PCB1).

5.

Disconnect

(CP110,

CP701, CP702,

CP204

and

CP207)

from

the

Input

P.C.Board

(PCB9).

6.

Remove

the

flat

cable

from

wafer

(CP401)

on

the

Input

P.C.Board

(PCB9)}.

.

Remove

5

screws

(L)

and

then

remove

the

Input

P.C.Board

(PCB9).

,

refering

to

the

wo

~

MAIN

P.C.Board

(PCB1)

REMOVAL

1.

Remove

the

Cover

Top

(51),

refering

to

the

[I].

2.

Do

Steps

[2], [8],

[9],

10),

1]

and

(12).

3.

Unsolder

all

leads

of

(Q216L/R,

Q217L/R

and

Q213L/R)

from

copper

track

on

the

Main

P.C.Board

(PCB1).

.

Disconnect

(CP201,

CP202, CP203,

CP204,

CP206,

CP207H

and

CP207T)

from

the

Main

P.C.Board

(PCB1).

.

Remove

6

screws

(N)

and

then

remove

the

Main

P.C.Board

(PCB1).

S

ot

Harman Kardon AVR20MKII Manual de usuario

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