Harman Kardon AVR20MKII User manual

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
AM IFT cFB04
i
3IKk-B
Bye SS SS eT SSS SASS SSS as a
1
FM
RF
IFT
|
CF802
1 FM RF AMP if AMP CF803 20 18
eo
Pant
4
1
1C801:1A1266
4
rr
7
AM/FM
IF
AMP
4
24QUADRATURE
DET
12
f
+
23
21
1
' Tt
a)
i
SS
SiS
RRR
Sait
en
See
Se
ee
Se
eils
a
t
DA
as 2 CONT
LOCAL
OSC
T802
1C803:HA12016
LIN
FM PLL MPX
4 7 -INI
“SL
AM
RF
7807
ee
AM ANT “My
————
-
4 T
1
a it To R Channel ——>———
4 {
10802:LM17001
PLU SYNTHESIZER I MUTE
I
10101 L¢7821 |
FUNTION TUNER |
SWITCH CONTROL
EQ
AMP
{IC
103)
7
‘eens
PHONO
(©)
S
30
BY-PASS
cv
©
29
Ic501
HALL
v O58
(PLAY:
TAPE1 Ore 27
TAPE Oo 25
PRO LOGIC/
26,23,20
3
STEREO
VCRI ©} 22 [2
(C102 47821
FUNCTION
__SWITCH
TAPEXMO) 6) 22 28
2 21 23
TAPE
One
IC507
NJM2177
vcR1
en
tl
a
28
(2
q
AUDIO
IN
ee
m2
ON
i
°
vere
©
(REAR)
_
pa
DOLBY
PRO-LOGIC
3g
15
10301 GD4066
Fes
Se
toes
on
ADAPTIVE
MATRIX
IN
bude
-©
aT
1
6
0B
NJM2177
SS
HI a |
L.
4,
MONITOR
1
Orn
28
L=-—®)
42/47
6
VCR2 REAR —]
©
7
=
0)
MONITOR
2
DOLBY
ICs08
NJU970
roe
HALL DIGITAL
MATRIX DELAY Pir L
HALL

AVR20MKII
KEY REMOTE IR
MATRIX
REMOTE
COMMANDER
RESORNATOR
a
IN
OUT
sensor
|"
“LS!
Ei
FL
DISPLAY
°
SHIFT
REGISTER
cpu
1€401
6Vv
ST-BY
Mc1a094
CXP5O116
TRANS
ue
DATA | av
2
CONTROL
REGULATOR
_
|}
AC
803:
12016
LINE
FLAC
GV
ue.
ouTLeT
M PLL MPX
TEV at
“INPUT
PARTS
“18V
ey
ise
main
SURROUND
PARTS
va
ly
<TUNER
PARTS
POWER
-MAIN
AMP
PARTS
FRONT
AMP.
[awe
120V GoHe
POWER
SUPPLY
PARTS
CENTER
AMP.
=H
POWER
TRANS
250
BOLE
REAR AMP, SUPPLY
= wi vv wv i ae
UL
ac
relay
SUB-WOOFER
PRE
OUT
MAIN
IN
HEAD
PROTECT
on
PHONE
DISCRETE
MAIN AMP.
STEREO
MODE
65W
x2
e
SURR.
MODE
SOW
x2
FRONT
8
CENTER
Sos
(248, 1048 STEP) MUTE
| MAIN
ELECT
MOTOR
VOL,
Mee
|
VOL.
|
CENTER
1NJU970 PROTECT
can MAIN
| EJECT REAR
IGITAL VOL. 11dB MOTOR eM
IELAY 22/23 OL.
REAR
REAR _————
PRE
foe I
MUTE

CONTROLS AND FUNCTIONS
®
®)
@
OOO
©®
harman/kardon AVR 2011 Volume
Ztunng A Pane
® © ®@ @ © 0
P Scan
® ®@ ® © © 9
0-30 © Memory
= wnow peary = 1OREEESD
ne
AM FM
FM Mono Search
= VCR Tuner CO Bass Treble Balance
| | |
Power Headphones Speakers VCR2 VCRI Wd C) C) C)
4
— ®O000» HH notiten he re os @
== eee ena en
@ ® © @@O@2OOO8® ® © © ©
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