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Harman Kardon AVR20MKII User manual

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The
Harman
Kardon
Model
AVR20MKII
AUDIO
AND
VIDEO
RECEIVER
ysechnical
Manua
harman/kardon
AVR
2011
9
®@®@0
90
Bean
®
oa0
Memory
=a
CONTENTS
&
SPECIFICATIONS
«100s
ceconeseeseteneverseseceeseeeesvees
2
GENERAL
UNIT
cessseccccscesene
recent
eeteeeaeeeeeuen
ens
21
LEAKAGE
TEST
+4
PRINTED
CIRCUIT
BOARDS
-
22
BLOCK
DIAGRAM
----+-------2220808+
+5
ELECTRICAL
PARTS
LIST
«+++++++++++
23
CONTROLS
AND
FUNCTIONS
--
--6
IC
FUNCTIONAL
BLOCK
DIAGRAM
28
DISASSEMBLY
PROCEDURES
::--
7
WIRING
DIAGRAM
eve
eee
eee ere
re
reese
+33
CIRCUIT
DESCRIPTION
---------
oe
SCHEMATIC
DIAGRAMS
(I)
----+
34
ALIGNMENT
PROCEDURES
oe
14
SCHEMATIC
DIAGRAMS
(II)
«+
+35
TROUBLESHOOTING
«+++
“+
17
SCHEMATIC
DIAGRAMS
{IID
---
+36
GENERAL
UNIT
PARTS
LIST
--+++-+--+++ese2eeeeee
2
20
SCHEMATIC
DIAGRAMS
[{IV)
------seeereeseeer
terres
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%
<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
DIAGRAM
FM
FRONT
END
7805
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AVR
2011
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VCR
Tuner
CO
Bass
Treble
Balance
| |
|
Power
Headphones
Speakers
VCR2
VCRI
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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
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
next
station
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
previous
step
[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
previous
step
[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).
(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
previous
step
[1].
Remove
the
Front
Pane!
Assembly
{AA),
refering
to
the
Previous
step
[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
Previous
step
Remove
the
Front
Panel
Assembly
(AA),
refering
to
the
previous
step
[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
a
FRONT
P.C.Board
(PCB4)
REMOVAL
1.
Remove
the
Cover
Top
(51),
refering
to
the
previous
step
2,Remove
the
Front
Panel
Assembly
(AA),
refering
to
the
previous
step
[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
previous
step
[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
previous
step
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
previous
step
[I].
.
Remove
the
Surround
P.C.Board
(PCB11),
refering
to
the
previous
step
[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
previous
step
[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
previous
step
[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
previous
step
[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
previous
step
[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