AUDIO VIDEO SURROUND RECEIVER
KRF-V7772D
VR-3080
SERVICE MANUAL
© 1999-3/B51-5511-00 (K/K) 1841
POWER
ON/STANDBY
CLIP INDICATOR
DOLBY DIGITAL
DTS
SPEAKERS
A
B
MUTE
VOLUME
DOWN
UP
INPUT SELECTOR
DISPLAY MODE
PHONES
S VIDEO
V AV AUX L-AUDIO-R
CD2/TAPE2
MONITOR
PRE OUT
FRONT
SURROUND
CENTER
SUBWOOFER
AM
GND
FM
75
ANTENNA
AUDIO
PHONO
CD1
MD/TAPE1
REC
OUT
PLAY
IN
VIDEO1
REC
OUT
PLAY
IN
VIDEO2
PLAY
IN
VIDEO3
PLAY
IN
VIDEO4
PLAY
IN
CD2/TAPE2
MONITOR
REC
OUT
PLAY
IN
FRONT SPEAKERS
(6-16
)
SURROUND SPEAKERS
(6-16
)
CENTER
SPEAKER
(6-16
)
SWITCHED
TOTAL 100W MAX.
S VIDEO
VIDEO
MONITOR
OUT
VIDEO1
REC
OUT
PLAY
IN
VIDEO2
PLAY
IN
VIDEO3
PLAY
IN
VIDEO4
PLAY
IN
DIGITAL IN
SL16
TEXT
SYSTEM
CONTROL
VIDEO2
OPTICAL OPTICAL COAXIALCOAXIAL
VIDEO3 VIDEO4
CD1
IRRECEIVER
IN
DC12V 15mA
IRREPEATER
OUT
IROUT
LCD
REMOTE
SL16 XS8
Panel *
(A60-)
Panel escutcheon
(B01-0533-21)
Knob
(K29-6855-03)
Indicator
(B12-0333-04)
Knob
(K29-6855-03)
Front glass
(B10-2418-03)
Indicator
(B12-0326-04)
Front glass
(B10-2451-03)
Cylindrical receptacle
(E56-0012-05)
Foot
(J02-1405-03)
Phone jack
(E11-0271-05)
Knob
(K29-6858-12)
Indicator
(B12-0331-04)
Knob
(K29-6858-12)
Knob
(K29-6852-04)
AC power cord*
(E30-)
Slide switch
(S31-2132-05)
Phono jack
(E63-1028-05)
Cylindrical receptacle
(E56-0011-05)
Phono jack
(E63-0162-05)
Phono jack
(E63-0141-15)x2
Screw terminal board
(E70-0096-05)
*Refer to parts list on page37~.
Power cord bushing
(J42-0083-05)
Phono jack
(E63-1084-05)
Screw terminal board
(E70-0095-05)
Miniature phone jack
(E11-0360-05)
Miniature Phone jack
(E11-0291-05)
Optical receiving module
(W02-1181-05)
Lock terminal board
(E70-0052-05)
AC outlet *
(E03-)
Miniature Phone jack
(E11-0389-05)
Phono jack
(E63-0139-15)
Miniature Phone jack
(E11-0293-05)
Phono jack
(E63-1030-05)
KRF-V7772D(K) COVER1,1( 99.10.29 10:11 AM y[W 2
PowerPad
(A70-1191-05) : RC-R0907
Battery cover(A09-1115-08)
Remote
ENTER
VOLUME
CONFIRM
MUTE
ON/STANDBY
Batteries
AM Loop Antenna (T90-0833-05)
AC
(E03-0115-05)
plug adapter
FM
(T90-0841-05)
Antenna
Use to adapt the plug onthe
power cord to the shape of the
wall outlet.
(Present only for regions where
use is necessary.)
AM Antenna Base
KRF-V7772D/VR-3080
2
CONTENTS / ACCESSORIES
CONTENTS/ACCESSORIES/CAUTIONS ...................2
CONTROLS .................................................................3
DISASSEMBLY FOR REPAIR .....................................4
BLOCK DIAGRAM .......................................................5
CIRCUIT DESCRIPTION .............................................6
ADJUSTMENT ...........................................................12
WIRING DIAGRAM ....................................................13
PC BOARD ................................................................14
SCHEMATIC DIAGRAM ............................................19
EXPLODED VIEW .....................................................36
PARTS LIST...............................................................37
SPECIFICATIONS .....................................................49
Contents
Accessories
RESET
Resetting
Receiver
PowerPad
If you want to reconfigure PowerPad, you can reset
it. You do not need to do this unless you experience
a problem.
1. Open the cover and remove the batteries,
2. Use a pen or other thin-tipped object to press
the blue button in the center of the battery case:
OPEN
3. Reinstall the batteries and follow the instruc-
tions in this chapter to set up PowerPad again.
If none of the above solutions work, reset the micro-
processor:
(For USA and Canada)
1. Turn the receiver off.
2. Unplug the receiver.
3. Plug it back in while pressing and holding the
Power button (you may need someone else to
help you do this)
4. Continue to hold the Power button for more than
1 second.
(For Other Countries)
1. Turn the receiver off. (The Power button is OFF
position.)
2. Press ON/STANDBY button while pressing and
holding the Power button.
3. Continue to hold the Power button for more than
1 second.
KRF-V7772D(K) COVER1,1( 99.10.29 10:11 AM y[W 3
KRF-V7772D/VR-3080
3
CONTROLS
POWER
ON/STANDBY
CLIP INDICATOR
DOLBY DIGITAL
DTS
SPEAKERS
A
B
MUTE
VOLUME
DOWN
UP
INPUT SELECTOR
DISPLAY MODE
PHONES
S VIDEO
V AV AUX L-AUDIO-R
CD2/TAPE2
MONITOR
POWER
ON/STANDBY
ON
OFF
9.
Volume control knob
10. Display Mode button
11. Input selector button
12. AV AUX S VIDEO jack
13. AV AUX composite video jack
14. AV AUX audio jacks
15. CD2/Tape 2 Monitor indicator light
1.
Power On/Standby button
2.
Power indicator light
3.
Display panel
4.
Speaker selector buttons
5.
Headphone jack
6.
Mute button
7.
IR indicator
8.
IR transmitters
Except for USA
and Canada
ENTER
VOLUME
CONFIRM
MUTE
ON/STANDBY
1.
LCD display screen
2.
Joystick
3.
Enter button
4.
Volume up button
5.
Volume down button
6.
Confirm button
7.
Mute button
8.
On/Standby button
KRF-V7772D(K) COVER1,1( 99.10.29 10:11 AM y[W 6
6
6
3
4
4
9
9
3
3
2
11
12
1
4
3
5 x2
9 x5
8 x2
3 x2
7
13
13
13
14
14
15
10
KRF-V7772D/VR-3080
4
DISASSEMBLY FOR REPAIR
1
4
5
6
x2
3 x4
2
X09-
x3
HOOK
HOOK
1
4
6
6
6
6
x2
3
2 x2
2 x7
X08-
X08-
1
1
4
4
4
6
6
5
B side
[Remove the escutcheon (operation
panel)]
1. Remove the knob(
1), the nut (2), the 11
screws(
3, 4, 5) and 2 hooks (6), then
remove the front panel ass'y.
2. Remove the lead wire(
7), the 2 screws(8 :
except K,P type) and 7 screws(
9 ) then
remove the PCB.
3. Remove the under front glass(
0, -), then
remove the front panel(
=) from the sub
panel.
4. Remove the 2 under escutcheon sides(
~) by
· screw driver and the 2 hooks(!) then
remove the escutcheon(
@).
[Check the audio PCB(X09)]
1. Remove the 9 screws (
1,2,3).
2. Remove the 4 hooks(
4,5) and remove the
audio PCB(X09),then stand the set with left
side downward.
3. Connect between the chassis of the set and
the rear panel with an alligator clip lead wire
(
6).
[Check the B side of the DSP PCB
(X08)]
1. Remove the 11 screws(
1,2).
2. Remove the X08(C/10)(J/10) (
3 ), then
remove the X08(A/10) (
4).
3. Solder the pin 1(-17V), the pin 4 (+17V) and
the pin 6(GND) between CN1 on the
X08(A/10) and CN2 on the X08(I/10) with 3
lead wires (
5).
4. Connect between the each GND of J1, J62,
J61, J2 on the X08(A/10)and the rear panel
with 4 alligator clip lead wires (
6).
Fig. 2
Fig. 1
Fig. 3
KRF-V7772D(K) COVER1,1( 99.10.29 10:11 AM y[W 7
VIDEO 1
AV AUX
(FRONT)
VIDEO 4
VIDEO 3
VIDEO 2
VIDEO 1
COMP
VIDEO
PLAY
COMP
REC
VIDEO
Q611,612
BA7626F
IC61
Q621,622
OUT
Q623
(OSD)
1Vp-p/75
(VISUAL)
VIDEO 1
VIDEO 2
VIDEO 3
VIDEO 4
(FRONT)
AV AUX
REC
PLAY
(S1-VIDEO)
1Vp-p/75
MONITOR OUT
Q643
Q653,
Q655
Q642
Q641
VIDEO 1
Q651,652
BA7626F
IC65,66
CD1
VIDEO1
VIDEO2
VIDEO3
VIDEO4
MD/TAPE1
TAPE2
VIDEO1
VIDEO3
VIDEO2
VIDEO4
AVR
IC8
+5.7V
GND
D17-20
FINAL TR.
FINAL TR.
GND
PRE DRIVE
GND
PRE DRIVE
D2
D1
Q100
RELAY
DRIVER
-17V
GND
+17V
D3-6
Q2
AVR
Q1
+5.0V
GND
Q16
AVR
D13-16
Q7
AVR
-35V
FIL
FIL
STROKE SW
Q8
RELAY
DRIVER
AC OUTLET
D9
K6
T1
AVR
IC5
CD1
L3,R3
L2,R2
L1,R1
L8,R8
L7,R7
L6,R6
L5,R5
L5,R5
MONITOR
L6,R6
MD/TAPE1
L4,R4
L3,R3
IC2
BUFFER
REC OUT
L1,R1
L8,R8
L7,R7
IN
L2,R2
LINE
BUFFER
IC3
TUNER
2.5mV/
PHONO
IC6
IC5
IC4
IC1
EQ
(ANALOG)
INPUT ATT
IC1
BUFFER
DAC
DIR
IC3
21kHz LPF
21kHz LPF
21kHz LPF
21kHz LPF
IC11
IC21
IC31(1/2)
IC31(2/2)
SUB
CENTER
LS,RS,
FL,FR
CONFIG-2
IC12,13
FILLTER
TONE OFF
L7,R7
L6,R6
L5,R5
L2,R2
TONE
IC41
IC42
L1,R1
L8,R8
L3,R3
VOLUME
VOLUME
VOLUME
VOLUME
IC16
IC26
IC36(1/2)
IC36(2/2)
Q352
Q251,252
-20dB
Q351
Q151,152
ATT
-20dB
ATT
-20dB
ATT
-20dB
ATT
IC37
(2/2)
(1/2)
IC27
IC17
AMP
Q15
Q13,14
Q11,12
MUTE
MUTE
MUTE
A-MUTE
MUTE
Q253-256
Q353,355
MUTE
Q354,356
MUTE
MUTE
K5
K4
K2
POWER
AMPLIFIER
POWER
POWER
K3
RELA
Y
A
RELA
Y
CS
RELA
Y
B
A-MUTE
S-MUTE
SW
-MUTE
FRONT
SW
L,R
FRONT B
C
LS,RS
PHONES
L,R
FRONT A
SPEAKERS
PRE OUT
1.0V/1K
u-COM
IC71
CONTROL
REMOTE
A91
PROTECTION
S1 DETECTOR
V MUTE
SP.RELAY
SW MUTE
S MUTE
A MUTE
200mV/47K
200mV/2.2K
IN
OUT
OTHER
IC15
AMPLIFIER
AMPLIFIER
DIGITAL
PHONES
1.3Vrms/32
S1
CD2/TAPE2
PLAY
IN
AV AUX IN
(FRONT)
REC
OUT
COAXIAL
IN
OPTICAL
IN
(2/2)
IC32
L,R
+5.7V
IC62
AVR
4.7K
PHONO
Q153-156
1.1Vrms/32
A2
A1
L4,R4
MONITOR
Q3,4
Q1,2
654
IC37
C
LS,RS
A/C
CONVERTER
CS4226
DSP
SRAM
IC51
IC52
X51
IC56,57
-6dB
ATT
IC32
(1/2)
L4,R4
TUNER
8
AUDIO SEL.
3
DPS
10
DIR DAC,ADC
9
TONE.VOL. 3
20dB ATT
3
6 (J TYPE)
OUT
IR REPEATER
J85
IN
IR RECIEVER
J84
OUT
IR RECIEVER
J83
IR LED
REMOTE OUT
D571-574
SYSTEM
J81
SYSTEM
CONTROL
J82
TEXT
SL16
FL
ED1
LEDx7
FL
MI-COM
IC91
38kHz
FILTER
856,857
Q851,852,
455kHz
FILTER
Q853-855
CONTROL
IC72
REMOTE
MI-COM
X8
RX
BUSY
TX
DATA,
D30
D10
AVR
IC54
+3.3V
AVR
J
K,Y,M,X
20.0V/4
24.5V/6
K,Y,M,X
J
5ch SP. OUTPUT
DETECTOR
S1
IC67
J1
J2
-20dB
A
T
T
K1
V-MUTE
Y
C
C
Y
Y
C
C
Y
C
Y
V-MUTE
Y
C
C
Y
+
+
+
SE-RLY
+
+
+
POWER-RL
Y
to
u-COM
to
POWER
SELECTOR
to
SRAM
CODEC
VOLUME
-3dB
A
T
T
-6dB
A
T
T
-144
R141
ST
RST
CK
DI
DO
51
to
u-COM
FL
TONE
TUNER
PRE AMP
to DSP
to
to
VIDEO
SELECTOR
u-COM
EACH
INPUT
C-TERMMNAL
VR-3080
(X09)
(X08)
(X09)
(X09)
KRF-V7772D
(X08)
(X05)
(X08)
(X08)
(J TYPE)
(X08)
(SIGNAL STAGE)
(u-COM STAGE)
KRF-V7772D/VR-3080
5
BLOCK
DIAGRAM
KRF-V7772D(K)
COVER1,1(
99.10.29
10:11
AM
y[W
10