Kenwood KRF-V7771D User manual

SYSTEM
CONTROL
FRONTSPEAKERS
(6-16Ω)
CENTER
SPEAKER
(6-16Ω)
SURROUNDSPEAKERS
DIGITAL IN
CD1
COAXIAL
VIDEO 4
COAXIAL
VIDEO 3
OPTICAL
VIDEO 2
OPTICAL
SL 16 XS 8
( SL 16 )(
XS 8 )
(6-16 Ω)
OPTICAL
DIGITAL OUT
SWITCHED
L
RAL RLC
R
B
SL 16
TEXT
IR
RECEIVER
IN
RELAY
CONTROL
IR
OUT
LCD
REMOTE
IR REPEATER OUT
TV
ON/OFF
SENSOR
L
RR
R
L
R
ANTENNA
AM
-FM 75Ω
GND
CD1
PHONO
MD/
TAPE1
REC
OUT
PLAY
IN
REC
OUT
PLAY
IN
PLAY
IN
PLAY
IN
CD2 /
TAPE 2
MONITOR
MONITOR
OUT
SURROUND
CENTER
SUB
WOOFER
L
L
R
VIDEO S VIDEO
VIDEO
SECOND ROOM PRE OUT
PRE OUT
AUDIO
VIDEO 3
VIDEO 4
PLAY
IN
VIDEO 2
VIDEO 1
L
R
AUDIO
PLAY
IN
REC
OUT
+
-
AUDIO
PHONES
INPUT SELECTOR
VOLUME
DTS
DOLBY DIGITAL
CLIP INDICATOR
POWER
ON/STANDBY
A
B
SPEAKERS MUTE
DOWN UP
DISPLAY MODE
S VIDEO V L - AUDIO - R CD2 / TAPE2
MONITOR
ON OFF
AV AUX
AUDIO VIDEO SURROUND RECEIVER
KRF-V7771D/VR-2080
KRF-V8881D/VR-2090
SERVICE MANUAL
© 1998-5/B51-5426-00 (K/K) 1796
Indicator
(B12-0326-04) Indicator (B12-0333-04)
Indicator
(B12-0303-24)
Panel*
(A60-) Knob* (K29-)
Knob*
(K29-) Knob* (K29-)
Front glass
(B10-2418-03) Video cylindrical receptacle* (E56-)
Phone jack
(E11-0271-05)
Phono jack
(E63-1030-05)
Knob*
(K27-) Knob* (K29 -)
Lock
terminal board
(E70-0052-05)
AC power cord*
(E30-)
Miniature phone jack
(E11-0373-05)x2
Oscillating module
(W02-1114-05) AC outlet* (E03-)
Screw
terminal board
(E70-0096-05)
Phono jack
(E63-0133-15)
Phono jack
(E63-1028-05)
Front glass
(B10-2451-03)
* Refer to parts list on page 60.
Phono jack
(E63-1008-05) Phono jack (E63-1005-05) Slide switch
(S62-0034-05)
Phono jack
(E63-0139-15)x2
Phono jack
(E63-0200-05)
Phono jack
(E63-0136-15)x2
Power cord bushing
(J42-0083-05)
Screw terminal board
(E70-0095-05)
Optical receiving module
(W02-1181-05)x2
Video cylindrical receptacle
(E56-0011-05)x2 Miniature phone jack
(E11-0360-05)
Phono jack
(E63-0162-05)x2 Miniature phone jack (E11-0291-05)
Miniature phone jack
(E11-0374-05)x2
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

FM
(T90-0835-05)
indoor antenna (1)
Remote
(A70-1191-05)
(RC-R0907)
Battery cover(A09-0378-08)
control unit (1) Loop antenna stand (1)
Batteries(R6/AA) (4)
AM loop antenna (1) (T90-0833-05)
(J19-3645-05)
Check that the following accessories are present.
* AC
(E03-0115-05)
plug adaptor (1)
*Use to adapt the plug on the power cord
to the shape of the wall outlet. (Accessory
only for regions where use is necessary.)
KRF-V7771D/V8881D/VR-2080/2090
2
CONTENTS / ACCESSORIES / CAUTIONS
CONTENTS / ACCESSORIES / CAUTIONS...............2
CONTROLS.................................................................3
DISASSEMBLY FOR REPAIR.....................................5
BLOCK DIAGRAM.......................................................6
CIRCUIT DESCRIPTION.............................................9
ADJUSTMENT.......................................................... 17
WIRING DIAGRAM....................................................19
PC BOARD ................................................................23
SCHEMATIC DIAGRAM............................................31
EXPLODED VIEW .....................................................59
PARTS LIST...............................................................60
SPECIFICATIONS.....................................................79
Contents
Accessories
Cautions
How to reset the microcomputer
The microcomputer may malfunction (impossibility of operation,
erroneous display, etc.) when the power cord is unplugged and
plugged in again while the unit is in ON mode with the key
pressed or due to other external causes. In this case, execute the
procedure on the right to reset the microcomputer and return the
unit to the normal condition.
1Unplug the power cord from the wall outlet.
2While holding the (ON/STANDBY) key depressed, plug the
power cord into the wall outlet again.
÷ Resetting the microcomputer clears the memory you entered and
returns it to the initial condition when the unit left the factory.
U.S.A. and Canada
1With the power cord plugged in, turn the POWER key OFF.
2Whill holding down the ON/STANDBY key, press POWER key.
Expect for U.S.A. and Canada
Please note that the following items will be deleted from
this unit’s memory if the power cord is disconnected
from the AC outlet for approximately three days.
Memory backup function
÷ The frequency setting is cleared and 87.5 MHz is selected.
÷ The preset station memory is cleared.
÷ The surround setting is cleared and reset to the initial condition.
÷ The input selection is cleared and the “Tuner” input is selected.
÷ The volume setting is cleared and the volume is set to “-66 dB”.
÷ The receiving band setting is cleared and the “FM” band is
selected.
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PHONES
INPUT SELECTOR
VOLUME
DTS
DOLBY DIGITAL
CLIP INDICATOR
POWER
ON/STANDBY
A
B
SPEAKERS MUTE
DOWN UP
DISPLAY MODE
S VIDEO V L - AUDIO - R CD2 / TAPE2
MONITOR
3 4 @8
65 7 # $ ^% *&
0
9!
ON/STANDBY
POWER
ON OFF
21
AV AUX
ST.
TUNED
MUTE
STANDBY indication
1POWER key
(U.S.A., U.S.Military and Canada)
Press to switch power ON and OFF.
2POWER key
(Except for U.S.A., U.S.Military and Canada)
(China : POWER)
Press to switch the main power ON and OFF.
3ON/STANDBY key
(Except for U.S.A., U.S.Military and Canada)
Press to switch the power mode between
STANDBY and ON.
4STANDBY indicator
Lights in STANDBY mode.
5RCsensor
Receives signals transmitted from the re-
mote control unit.
6PHONES jack
Use for listening audio through headphones.
7SPEAKERSkeys
Press each key to switch the SPEAKERS A or
SPEAKERS B ON and OFF.
Stereo indicator
MUTE indicator
TUNED indicator
Multi-mode display
While standby indicator is indicated, a small amount of power is supplied to the system to back up the memory. In this mode, the system can be
turned ON by remote control.
Display
8Indicators
CLIP INDICATOR :
Lights when the input is clipped during
analog to digital signal conversion.
DOLBY DIGITAL :
Lights when Dolby Digital is activated.
DTS :
Lights when the DTS is activated.
9MUTE key
Press to mute the audio temporarily.
0RC transmitter
Sends signals to the remote control unit.
!Indicator
Lights when signal is input from or output to
the remote control unit.
@VOLUME control knob
Rotate to adjust the volume.
#S VIDEO input jack
(Except for the VR-2080 or the KRF-V7771D
for the U.S. Military destination)
Connect the S VIDEO output jack of an AV
component.
$VIDEO input jack
Connect the composite video output (RCA)
jack of an AV component.
%AUDIO (L, R) input jacks
Connecttheaudio output (RCA) jacks ofanAV
component.
^CD2/TAPE2 MONITOR indicator
Lights when the CD2/Tape2 (Monitor) input is
used.
&DISPLAY MODE key
Press to switch the display on the main unit.
*INPUT SELECTOR key
Press to switch the input as shown below.
TUNER
CD1
MD/Tape1
VIDEO1
VIDEO2
VIDEO3
VIDEO4
AV AUX
PHONO
KRF-V7771D/V8881D/VR-2080/2090
3
CONTROLS
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2
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

ON/STANDBY
MUTE
VOLUME
ENTER
SetupSurround
SP Level
Surr.SP Type
SP Distance
SP Selection
Tuner CD1
Video2 Video3 Video4
Video1
TV1
Phono
TV2
CD2
MD/
Tape1
CD2/
Tape2
Input
Digital
Input
Analog
AV AUX Macro
Remote
Mode
Main
Menu
CONFIRM
Note
Note
Model Type Setup
Model 3
Model 2
Model 1
23
¶
•
ª
£
⁄
)
¡
(
º
¢
1
6547890!@#$
%^
& * ∞ §
™
RC : Infrared system
Perform “Model Type Setup”
of the RC before using it.
The following menu display ap-
pears after the batteries are
loaded for the first time.
Controls and indicators
The Remote Control unit provided with the Receiver can also control KENWOOD MD recorder, cassette decks, CD player, DVD
player and LD player which are connected to it through system control cords. For details of the controllable functions, refer to
the instruction manuals of these components.
The displayed icons are variable depending of the “Model Type Setup” for
matching specifications with the Reciever which uses the RC unit and “Setup” for
matching specifications with connected source component.
1Segment screen
The fixed icons are displayed in
this area.
2TV1 icon
Select to display the TV1 control
screen.
3Main Menu icon
Select to display the Main Menu
screen.
4TV2 icon
Select to display the TV2 control
screen.
5Phono icon
Select to select the PHONO in-
put.
6Video1 icon
Select to control Video1.
7CD1 icon
Select to control CD1.
8Video2 icon
Select to control Video2.
9CD2 icon
Select to control CD2.
(Room B only)
0Video3 icon
Select to control Video3.
!Tuner icon
Select to control Tuner.
@Video4icon
Select to control Video4.
#MD/Tape1 icon
Select to control MD or Tape1.
$CD2/Tape2 icon
Select to monitor the CD2/Tape2
input. (Room A only)
%AV AUX icon
Select to select the AV AUX in-
put.
^Input Digital icon
Select to play a digital input or to
switch between Auto and Manual.
&Macro icon
Select to control Macro.
*Input Analog icon
Select to play an analog input.
(Remote Mode icon
Select to switch the remote con-
trol operation mode without
changing the selected input.
Segment screen
Operation keysMenu screen
)Menu screen
Control key icons and con-
trol levels are displayed in
this area.
¡Status display
The example in the illus-
tration shows the “Setup
Surround” status.
™SP Selection icon
Select to set up the speak-
ers.
£Return icon
Select to return to the pre-
vious menu screen.
¢Status display
Shows the communication
status.
∞Joy stick key
This key is used to select an
icon. This key can be controlled
in 4 directions.
§ENTER key
Press to enter the selection of
an icon.
¶VOLUME (up) control key
Press to increase the volume.
•VOLUME (down) control
key
Press to decrease the volume.
ªCONFIRM key
Press to select the currently
displayed items.
ºMUTE key
Press to mute the audio
temporarily.
⁄ (ON/STANDBY) key
Press to turn this unit and the
components connected to it
through system cords between
ON and STANDBY modes.
KRF-V7771D/V8881D/VR-2080/2090
4
CONTROLS
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6
6
3
4
4
9
9
3
3
2
11
12
1
43
5x2
9x5
8x2
3x2
7
13
13 13
14
14
15
10
1
2
2
2
1
x3
2x3
2
2
x2
x5 2x2
2
3
3
3
3
1
3
x29
[Remove the bottom plate.]
Make use of the changing final transistor etc.
1. Remove the 19 screws (1, 2) and PCB support, then
remove the bottom plate.
[Check the vertical PCB]
1. (Exist bottom plate) Remove the hook of rear
panel(1).
2. Remove the 29(Exist bottom plate: 34)
screws(2), then remove the rear panel.
3. Connect the GND of the phono terminal, the
GND of antenna shield board,the GND of
coax., the GND of system control shield
board, the GND of SP terminal shield board
and the chassis with 5 wires connected alli-
gator chips(3).
[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(@).
Fig. 3
Fig. 1
Fig. 2
KRF-V7771D/V8881D/VR-2080/2090
5
DISASSEMBLY FOR REPAIR
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(X08)
(X11)
(X11)
(X25)
IC89
IC60
VR-2090
DIGITAL
VR-2090 DIGITAL REC SEL.
IC71
OUT
DIGITAL
OPTICAL
D-SEL2
D-SEL1
MAX:1.0Vrms
TC9163AF-2
TC9164AF-2
OTHER
OUT
IN 200mV/2.2K 200mV/47K
DIRECT
FL,FR
LS,RS,
CENTER
SUB
IC78(2/2)
IC80
IC78(1/2)
IC76
80Hz LPF
21kHz LPF
21kHz LPF
21kHz LPF
IC56
IC55
IC56
IC59
IC86
IC87 IC52
IC62
AD/DA
CS4226
DRAM
DRAM
SRAM
ROM
AC-3
DSPF56009FJ88
DTS
DSPI56009FJ88
CONFIGRATION
DSPB56007FJ88
BUFFER
BUFFER
IC74
IC5
BUFFER
ROOM B
LINE
IC21(2/2)
INPUT ATT
L1,R1 L2,R2
(DIGITAL)
(ANALOG) EQ IC1
IC23
IC1(1/2), IC2(1/2)
IC4
IC1(2/2), IC2(2/2)
IC72
(TAPE2 MONITOR)
PHONO
2.5mV/4.7K
TUNER
IC21(1/2)
BUFFER
LINE
ROOM A
L4,R4
PHONO IN
R5
L3,R3L5,R5
L7,R7
REC OUT
BUFFER
IC3
L3
R3
R1
R4
R2
L8,R6
R3,R5
R2,R4
R1,R7
L2
TAPE1/MD IN
L4
TAPE/CD2 IN
L1
L1,R8
L2,L4
L3,L5
L6,L7
L5
L7
R8
R7
L8
BUFFER
BUFFER
BUFFER
BUFFER
VIDEO2 OPTICAL
VIDEO3 OPTICAL
CD COAXIAL
VIDEO4 COAXIAL
TAPE2 REC
VIDEO2 REC
VIDEO1 REC
TAPE1/MD REC
VIDEO4 IN
AV AUX IN
VIDEO3 IN
VIDEO2 IN
VIDEO1 IN
CD1 IN
Ω
Ω
Ω
KRF-V7771D/V8881D/VR-2080/2090
6
BLOCK DIAGRAM
(SIGNAL STAGE)
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78
BLOCK DIAGRAM
KRF-V7771D/V8881D/VR-2080/2090 KRF-V7771D/V8881D/VR-2080/2090
(X07)
(X25)
(X08)
(X25)
(X07)
(X25)
(X25)
VR-2080
RESET
SDT
MCK
MREQ
MDT
SREQ
MISO/SDA
7
6
7
.STB
.RESET
DATA IN
CLK
DATA OUT
6
5
51
7
SS
SCK/SCL MISO/SDA
HREQ
GPI00
RESET
MOS
HREQ
MISO/SDA
HREQ
GPI00
GPI02MOS
SS
RESET
SCK/SCL
.AUDIO
.PDN
.FREQO.AC-3
.ERR.FREQ1
CDIN
CS
CCLK
CDOUT
CLK
DATA
DATA
CLK
STB
+
To FAN
SRAM
DRAM
TUNER
To
DSP
To
ANALOG
POWER
To
u-COM
To
POWER-RLY
+
+
+
SE-RLY
+
+
+
Y
Y
C
C
YV-MUTE
Y
C
Y
C
C
Y
Y
C
C
Y
V-MUTE
C
S1
(X08)
(u-COM STAGE)
IC53
VR-2090
27.9V/6
26.8V/6
24.5V/6
VR-2080
KRF-V8881D
KRF-V7771D
5ch SP. OUTPUT
VR-2090
VR-2090 VR-2090
AMPLIFIER
AMPLIFIER
FAN FRST/SLOW
FAN ON/OFF
DTS
AC-3
CONFIG
SBUSYSDATA
RXTX
VR-2090
TC9163AF-1IC42 SYSTEM CONTROL
(X08) J17
SYSTEM CONTROL
(X08) J16
(X08) J15
SL16 TEXT
DATA-IN
10DAC/ADC
TUNER
5(A,B,CS,TR,POWER)
2
9TUNER
3
4
3
8
RELAY
FAN
VIDEO SEL.
DIGITAL INPUT SEL.
WIDE V-MUTE
VIDEO SYNC
TONE CONT.
PROTECTION
455kHz FILTER
VR-2090 (K,P)
(X11) J13 (1/2)
IR RECEIVER IN
REPEATER OUT
(X11) J14
VR-2090 (K,P)
IC86
(X08)
6
FANFAN DRIVER
(X07) Q211-215
PARALEL
SIRIAL/
OUT LED
(X11) D21-24
IR LED REMOTE OUT
(X11) J13 (2/2)(X08) Q64-66
(X08) IC67
REMOTE
u-COM
SENSOR
TV or LIGHT
RELAY CONTROL
(X11) J12
RDS
(X08) IC68
(X08) IC69
MAIN u-COM
DATA-OUT
SUB u-COM
REMOTE SENSOR
(X25) A1
KEY MATRIX
FL
(X25) ED1
FL DRIVER
(X25) IC61
LED
PEAK LEVEL
LED
1.0/1K
PRE OUT
PRE OUT
SPEAKERS
FRONT A
L,R
PHONES
C
SL,SR
FRONT B
ROOM B SP
C
SL,SR
SW
SECOUND ROOM PRE OUT
B-MUTE
SW-MUTE
S-MUTE A-MUTE
RELAY B
RELAY CS
RELAY A RELAY S
BUFFER
IC31(2/2)
BUFFER
IC30
IC31(1/2)
BUFFER
K2
29dB POWER
(X25)(X07)
29dB POWER
(X25)(X07)
AMPLIFIER
29dB POWER
(X25)(X07)
K1
K1
K4
K3
MUTE
Q1-4
MUTE
Q36
MUTE
Q33,34
Q35
MUTE
SW-MUTE
B-MUTE A-MUTE
-20dB ATT
MUTE
Q5,6
MUTE
MUTE
MUTE
MUTE
Q3,4
Q11
Q7,8
Q12
BUFFER AMPIC22
IC26
IC24
(2/2)
IC26
(1/2)
ATT
-20dB
ATT
-20dB
ATT
-20dB
ATT
Q1,2
Q5,6
-20dB
Q9
Q10
IC28
IC53
(2/2)
IC52
IC53
(1/2)
IC51
ROOM B
IC27
IC25(2/2)
IC23
IC25(1/2)
IC21
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
L7,R7
L8,R8
L4,R4
IC44
IC43
TONE
L6,R6
L1,R1
L3,R3
L2,R2
(X11)
LOW BOOST
IC47,48
CONFIG-2
IC49
INV
VIDEO
SECOND(B)
ROOM
D82
GND
+30V
63-65,73
IC57,61,
AVR
AVR
IC82
AVR
IC83 D86
D311
EXCEPT K.P
EXCEPT K.P
(X07) T1
K5
D312 AC OUTLET
DRIVER
RELAY
Q301
K6
STROKE SW
FIL
FIL
-35V AVR
Q311
D88
AVR
IC84
GND
+5.0V
To VIDEO 5
To VIDEO 5
AVR
Q85
AVR
Q86
AVR
Q83
AVR
Q84
D81
+17V
GND
-17V
DRIVER
RELAY
Q154
D252
D251
PRE DRIVE
GND
PRE DRIVE
GND
FINAL TR.
FINAL TR.
D301-304
GND
+5.6V (X07) IC31
AVR
Q13
VIDEO 2
Q14
VIDEO 1
Q12
Q30
Q16 Q31
Q15
MONITOR OUT
1Vp-p/75
(S1-VIDEO)
PLAY
REC
AV AUX
(FRONT)
VIDEO 4
VIDEO 3
VIDEO 2
VIDEO 1
(VISUAL)
1Vp-p/75
(OSD)
(SECOND ROOM) IC52(1/2)
Q17
MONITOR OUT B
Q55
MONITOR OUT
IC52(2/2)
IC13
TC74HC4051AP
IC51
SN761200N
Q51
Q52
VIDEO
REC
COMP
PLAY
VIDEO
COMP
VIDEO 1
VIDEO 2
VIDEO 3
VIDEO 4
(FRONT)
AV AUX
VIDEO 1
VIDEO 2
IC11,12
SN761200Nx2
Q11
Ω
Ω
Ω
Ω
Ω
Ω
wd/pcb98.12.99:22 y[W 1
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

KRF-V7771D/V8881D/VR-2080/2090
(0 : Pull down, 1 : Pull up)
TYPE BAND Reception
frequency Channel IF
PLL standard
Diode sw
space frequency DSW3 DSW2 DSW1 DSW0
K1 FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz 0000
1700 AM 530kHz~1700kHz 10kHz +450kHz 10kHz
K2 FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz 0001
1610 AM 530kHz~1610kHz 10kHz +450kHz 10kHz
K4 FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz 1010
1700 RBDS AM 530kHz~1700kHz 10kHz +450kHz 10kHz
E1 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz 0011
AM 531kHz~1602kHz 9kHz +450kHz 9kHz
E3 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz
RDS AM 531kHz~1602kHz 9kHz +450kHz 9kHz 0101
FML 65.0MHz~74.0MHz 10kHz +10.7MHz 5kHz
Q1 FMH 87.5MHz~108.0MHz 50kHz +10.7MHz 5kHz 1011
RDS AM 531kHz~1602kHz 9kHz +450kHz 9kHz
MK2/E1 is switched with only the setting of DSW1 (X11 : S601). 00X1
(DSW1 = 0 : K2 type, 1 : E1 type)
77 76 75 74
1. The back up item and initialization
condition
1-1 Back up
• POWER ON/OFF : OFF
• VOLUME LEVEL : -66dB
• AUDIO INPUT • SELECTOR : TUNER
• VIDEO INPUT • SELECTOR : VIDEO1
• SPEAKER A : ON
• SPEAKER B : OFF
• CD2/TAPE2 MONITOR : TAPE2 OFF
• TONE : OFF
• LOUDNESS : OFF
• DISPLAY MODE : DEVICE+DGTL/ANLG
• RDS DISPLAY MODE : FREQUENCY
• DIMMER : DIMMER 1 (LIGHTEST)
• SURROUND MODE : STEREO
• DSP MODE : ARENA
• ROOM SIZE : Med
• WALL TYPE : Med
• EFFECT LEVEL : 3
• MIDNIGHT MODE : OFF
• DISTANCE : FL/FR : 10ft
: C : 10ft
: RS/LS : 5ft
: SW : 10ft
• FRONT SP. : LARGE
• CENTER SP. : NORMAL
• SURROUND SP. : NORMAL/WIRED
• SUB WOOFER : ON
• SW Re-Mix : OFF
• INPUT LEVEL : 0dB
• CH. LEVEL : 0dB
• TONE BASS : 0dB
• TONE TREBLE : 0dB
• TUNING MODE : AUTO
• PRESET MEMORY : TEST MEMORY FRE-
QUENCY (Same value with KR-V999D/1090VR)
• LAST BAND : FM
• FM LAST FREQUENCY : 87.5MHz
• AM LAST FREQUENCY : 531kHz (CH. SP 9kHz)
: 530kHz (CH. SP 10kHz)
• LAST P. ch : [- -ch]
• PTY SELECT MODE : OFF
• PTY SEARCH MODE : OFF
• TP SEARCH MODE : OFF
• RDS DISPLAY MODE : FREQUENCY MODE
1-2 The initial setting
While pressing POWER key, plug the AC power cord
into an AC outlet (K,P type) or turn on the AC POWER
switch.
2. Condition by the destination or model
3. TEST MODE
[setting method]
While pressing INPUT SELECTOR key, plug the AC
power cord into an AC outlet (K, P type) or turn on the
AC POWER switch. When a set is set up in test mode
condition a set becomes the following condition.
Automatic POWER ON. All indicator tube (FL) and
CLIP INDICATOR LED are lighted. The other LED are
flashed.
A backup at the thing except ON/OFF of POWER is
initialized.
[cancel method]
The power supply is turned off.
9
CIRCUIT DESCRIPTION
KRF-V7771D(K)COVER( 98.12.818:58 y[W 25
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

KRF-V7771D/V8881D/VR-2080/2090
10
CIRCUIT DESCRIPTION
(X25) IC53
MAIN u-COM
uPD78078GF-080
VIDEO IC
NJU3713D
SEL_DATA, SEL_CLK,
VIDEO_STB
(X11) IC1,2,42
(X25) IC23
SEL IC1/2
TC9162~9164
SEL_DATA, SEL_CLK,
SEL_STB1, SEL_STB2
(X11) IC21,23,25,27
VOLUME IC
TC9412/9413AP
VOL_DATA, VOL_CLK,
VOL_CE1
(X11) IC44
TONE IC
TC9184AP
VOL_DATA, VOL_CLK,
VOL_CE2
(X11) (X25)
REMOCON
REMOCON_IN1 (FRONT PANEL)
REMOCON_IN2 (REPEATER)
(X08)
IC68
TUNER/RDS
SAA6579
RDS_DAT, RDS_CLK,
RDS_SLEVEL, T_MUTE,
SD, STEREO
(X11)
IC602
TUNER PLL IC
LC72131
PLL_CLK, PLL_DATA,
PLL_CE, PLL_DO
MEGA CHANGER
(CD-0000M)
UART_RXD, UART_TXD,
(X08) IC66
SUB u-COM
uPD78058GC
SUB_RESET, SDT, MOT,
MCK, MREQ, SREQ
(X25) IC61
FL DRIVER
FL_DOUT, FL_DIN,
FL_CLK, FL_STB,
DPU_RST
SERIAL
SDATA, SBUSY
(X07) K1~6
(X25) K1
RELAY
RELAY_A, RELAY_B,
RELAY_CS, RELAY_TR,
RELAY_POWER, EXT_OUT
RELAY_MULTI
DESTINATION
999_888, 8_16, TSW_B,
TSW_1, TSW_2,
TSW_3 (CH, SP)
(X11) S1
ENCODER
ENC_VOL1, ENC_VOL2
(X08) IC67
REMOCON COMMUNICATION IC
SMK_REQ, SMK_ENB, SMK_RWR, SMK_D0,
SMK_D1, SMK_D2, SMK_D3, SMK_D4, SMK_D5,
SMK_D6, SMK_D7
MUTE
MUTE_A, MUTE_B,
SW_MUTE, -20dB_ATT,
VIDEO_MUTE, SCH_MUTE
(X25) IC 90
PERFECT MACRO
POWER DETECT
TU_PDET, U_PDET,
USEL_CTLA, USEL_CTLB
USEL_TR
(X08) IC60,71,89
OTHERS
TC74HC153AF
PROTECTION1,
PROTECTION2, FAN1,
FAN2, FAN3, DIN_1, DIN_2
Push key INPUT SELECTOR SP A SP B MUTE DISPLAY MODE
TUNER STEREO P. CALL
UP P. CALL DOWN
ATT
OFF ON FM
AUTO/STEREO MANUAL/MONO
(DOLBY DIGITAL LED : OFF ON)
(Press the key for 2 secs)
CD1 STEREO TONE (TUNED)
+10 (light on) OFF (light off)
ANALOG DIGITAL
MD/TAPE1 STEREO
IR RECEIVER A(ON) OFF
VIDEO1 PRO LOGIC
VIDEO2 3 STEREO
DISPLAY VIDEO3 STEREO
VIDEO4 DSP
ARENA JAZZ CLUB
THEATER STADIUM
CATHEDRAL
AV AUX STEREO TAPE2
OFF ON
PHONO STEREO INPUT LEVEL
0dB -3dB -6dB
4. Main microprocessor uPD78078GF-080 (X08 : IC69)
4-1 Microprocessor periphery block diagram
KRF-V7771D(K)COVER( 98.12.818:58 y[W 27
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3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

KRF-V7771D/V8881D/VR-2080/2090
11
CIRCUIT DESCRIPTION
Pin No. Pin Name I/O Connect Description
1 VOL_STB O PD VOLUME IC CE (TC9412AP/TC9413AP)
2 VOL_CLK O PD VOLUME IC CLOCK (TC9412AP/TC9413AP)
TONE IC CLOCK (TC9184AP)
3 VOL_DATA O PD VOLUME IC DATA (TC9412AP/TC9413AP)
TONE IC DATA (TC9184AP)
4 SEL_STB1 O PD ANALOG SW. STROBE (NJU731x)
5 SEL_STB2 O PD ANALOG SW. STROBE (NJU7311-NJU7313)
6 VIDEO_STB O PD VIDEO IC STROBE (NJU3713)
7 SEL_CLK O PD ANALOG SW. CLOCK (NJU7311-NJU7313)
VIDEO IC CLOCK (NJU3713D)
8 SEL_DATA O PD ANALOG SW. DATA (NJU7311-NJU7313)
VIDEO IC DATA (NJU3713D)
9 – – PD NO USED
10, 11 X2, 1 – – MAIN CLOCK 4.19MHz (CERAMICS)
12 Vdd – +5V +5V
13, 14 XT2, 1 – OPEN NO USED
15 RESET I VDD uCOM RESET
16 REMOCON_IN1 I – FRONT PANEL REMOCON
17 REMOCON_IN2 I – EXTERNAL REMOCON
18 RDS_DATA I PD RDS DATA (SAA6579)
19 RDS_CLK I PD RDS CLOCK (SAA6579)
20, 21 NC I PD NO USED
22 CE I – BACK UP CE
23 AVdd – VDD +5V
24 AVrefo I VDD A/D POWER SUPPLY
25 RDS_SLEVEL I PD RDS SLEVEL (SAA6579)
26 T_MUTE O PD TUNER MUTE
27 PLL_CLK O PD PLL IC CLOCK (LC73131)
28 PLL_DATA O PD PLL IC DATA (LC72131)
29 PLL_CE O PD PLL IC CE (LC72131)
30 SD I PU SD INPUT
31 STEREO I PU STEREO INPUT
32 PLL_DO I PD PLL IC LC72131 DO (LC72131)
33 AVss – VSS GND
34 SUB_RESET O PD SUB uCOM RESET (uPD78058GC-A74)
35 V_PDET I PU PERFECT MACRO VIDEO POWER DETECT
36 AVref1 I VDD +5V
37 UART_RXD I PD MEGA CHANGER CD DATA RECEIVE
POWER LINE REMOCON CODE RECEIVE
38 UART_TXD O PD MEGA CHANGER CD DATA TRANSMIT
POWER LINE REMOCON CODE TRANSMIT
39 VSEL_TR O PD PERFECT MACRO VIDEO SELECTOR POWER SUPPLY SW. Tr
40 Vss – GND GND
41 SDT I PD uCOM-uCOM COMMUNICATION SLAVE DATA
(uPD78058GC-A74)
42 MDT O PD uCOM-uCOM COMMUNICATION MASTER DATA
(uPD78058GC-A74)
43 MCK O PD uCOM-uCOM COMMUNICATION MASTER CLOCK
(uPD78058GC-A74)
44 MREQ O PD uCOM-uCOM COMMUNICATION MASTER REQUEST
(uPD78058GC-A74)
4-2 Pin description
KRF-V7771D(K)COVER( 98.12.818:58 y[W 14
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

KRF-V7771D/V8881D/VR-2080/2090
12
CIRCUIT DESCRIPTION
Pin No. Pin Name I/O Connect Description
45 SREQ I PD uCOM-uCOM COMMUNICATION SLAVE REQUEST
(uPD78058GC-A74)
46 FL_DOUT I PD FL DRIVER DATA IN
47 FL_DIN O PD FL DRIVER DATA OUT
48 FL_CLK O PD FL DRIVER CLOCK
49 FL_STB O PD FL DRIVER STROBE
50 VSEL_CTLA O PD PERFECT MACRO VIDEO SELECTOR CONTROL A
51 VSEL_CTLB O PD PERFECT MACRO VIDEO SELECTOR CONTROL B
52 FAN_1 I PD FAN DETECT 1
53 FAN_2 I PD FAN DETECT 2
54 FAN_3 I PD FAN DETECT 3
55 SDATA I/O – SERIAL DATA
56 SBUSY I/O – SERIAL BUSY
57 RELAY_A O PD SPEAKER A RELAY
58 RELAY_B O PD SPEAKER B RELAY
59 RELAY_CS O PD CENTER/SURROUND SPEAKER RELAY
60 RELAY_TR O PD TRANS RELAY
61 RELAY_POWER O PD POWER RELAY
62 EXT_OUT O PD EXTERNAL OUT
63 NC O PD NO USED
64 DRV_RST O PD FL DRIVER RESET
65 TV_PDET I PD PERFECT MACRO TV POWER DETECT
66 999_888 I – TYPE SELECT H : VR-2090 L : VR-2080
67 8_16 I – SERIAL SELECT L : SERIAL 16bit H : SERIAL 8bit
68, 69 ENC_VOL2, 1 I PD VOLUME ENCODER IN
70 PROTECTION1 I PD PROTECT DETECT
71 Vss – GND GND
72 PROTECTION2 I PD PROTECT DETECT
73 NC I PD NO USED
74~76 TSW_0~2 I – TUNER SIMUKE SWITCH 0~2
77 TSW_3 (CH. SP) I PD TUNER SIMUKE SWITCH 3 (CHANNEL SPACE)
78 NC I – NO USED
79 RELAY_MULTI O PD SP B SIGNAL OUTPUT ROOM A : L ROOM B : H
80, 81 DIN_1, 2 O PD DIGITAL REC SELECT (TC74HC153AF)
82 DIN_STB O PD DIGITAL REC SELECT STROBE (TC74HC153AF)
83 SMK_REQ O PD REMOCON DATA TRANSMIT IC REQ
84 SMK_ENB I PD REMOCON DATA TRANSMIT IC ENB
85 SMK_RWR I PD REMOCON DATA TRANSMIT IC RWR
86~93 SMK_D0~D7 O PD REMOCON DATA TRANSMIT IC D0~D7
94 MUTE_A O PU ROOM A MUTE
95 MUTE_B O PU ROOM B MUTE
96 SW_MUTE O PU SWch MUTE
97 -20dB_ATT O PU -20dB ATTENUATER
98 VIDEO_MUTE O PD VIDEO MUTE
99 SCH_MUTE O PD Sch MUTE
100 TONE_STB O PD TONE IC CE (TC9184AP)
KRF-V7771D(K)COVER( 98.12.818:58 y[W 15
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

5. AUDIO INPUT SELECTOR CONTROL
INPUT MODE
TAPE
MONITOR SURROUND
MODE
INPUT
SELECTOR (X25 : IC23) TC9162 (X11 : IC4) TC9163 (X11 : IC1, 2) TC9164
SW1 SW2 SW3 SW4 SW5 SW6 SW7 L1 L2 L3 L4 L5 L6 L7 L8 R1 R2 R3 R4 R5 R6 R7 R8 L1 L2 L3 L4 L5 L6 L7 L8 R1 R2 R3 R4 R5 R6 R7 R8
ANALOG
Pin No. 2™3¡5_6)8*9&-%2346780-™¡+)(*^%2345780-™¡+_(*^% TUNER O
MD/TAPE1 O
CD1 O CD2 O
VIDEO1 OO VIDEO2 OO VIDEO3 OO VIDEO4 OO
ANALOG
PHONO O O OO OO
TUNER O O O OO OO
MD/TAPE1 O OO OO
CD1 O OOO OO
VIDEO1 O O O O O O VIDEO2 O O O OO O VIDEO3 O O O OO OO VIDEO4 O O O O O O O
AV AUX O OOO OO
DIGITAL
TAPE2 OFF TAPE2 ON
STEREO
MD/TAPE1 OO OOO
CD1 OOO O OO
VIDEO1 OOO O O VIDEO2 OOO O O VIDEO3 OOO O OO VIDEO4 OOO O OO
EXCEPT STEREO
MD/TAPE1 O OO O
CD1 O OOO OO
VIDEO1 O O O OO OO VIDEO2 O O O OO OO VIDEO3 O O O OO OO VIDEO4 O O O O O O O
ANALOG
PHONO O OO O OO
TUNER O O OO O OO
MD/TAPE1 OOOOO
CD1 OOOOOO
VIDEO1 O O O O O O VIDEO2 O O OO O O VIDEO3 O O OO O OO VIDEO4 O O O O O O O
AV AUX OOO O OO
DIGITAL
STEREO
MD/TAPE1 O
CD1 O
VIDEO1 O VIDEO2 O VIDEO3 O VIDEO4 O
EXCEPT STEREO
MD/TAPE1 O
CD1 O
VIDEO1 O VIDEO2 O VIDEO3 O VIDEO4 O
CD 2 is set CD2/TAPE 2 : (X11) IC1, 2 -pin OFF
ROOM A (TAPE 2 is set with CD 2/TAPE 2 SELECTOR) ROOM B
KRF-V7771D/V8881D/VR-2080/2090
13
CIRCUIT DESCRIPTION
KRF-V7771D(K)COVER( 98.12.818:58 y[W 18
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

KRF-V7771D/V8881D/VR-2080/2090
14
CIRCUIT DESCRIPTION
6. Sub microprocessor uPD78058GC-A74 (X08 : IC66)
6-1 Microprocessor periphery block diagram
MAIN u-COM
uPD78078GF-080
(X08)
IC62
A IN
D IN
A OUT
CDDEC
CS4226
(X08)
IC52
DTS DECODER
DSP5609
CLOCK
DATA
(X08) IC56
ŸDECODER
DSP56009
(X08)
IC92
TC74HC
123A
DATA
DATA
CLOCK
DATA
DATA
IC89
DATA
CLOCK
CLOCK
CLOCK
(X08)
IC60
TC74HC
153A TC74HC
153A
(X08)
IC59
CONFIGU-
RATION
DSP56007
(X08) IC66
SUB u-COM
uPD78058GC
–A74
VIDEO WIDE DETECT
VIDEO WIDE CHANGEOVER
CLIP INDICATOR CONTROL
CONTROL SIGNAL
AUDIO DATA, CLOCK
(X08) IC69
KRF-V7771D(K)COVER( 98.12.818:58 y[W 19
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

KRF-V7771D/V8881D/VR-2080/2090
15
CIRCUIT DESCRIPTION
Pin No. Pin Name I/O Connect Description
1 DSP1_RESET O P. D. DSP IC1 (AC-3) RESET
2 DSP3_SS O P. U. DSP IC3 (THX) SLAVE SELECT
3 DSP3_HREQ I P. D. DSP IC3 (THX) HOST REQUEST
4 – – GND –
5 DSP3_RESET O P. D. DSP IC3 (THX) RESET
6 N. C. I P. D. –
7 AVref1 – +5V –
8 DSP3_MI I P. D. DSP IC3 (THX) MASTER IN SLAVE OUT
9 DSP3_MO O P. D. DSP IC3 (THX) MASTER OUT SLAVE IN
10 DSP3_CK O P. D. DSP IC3 (THX) CLOCK
11 MDT I P. D. Microprocessor communication MASTER DATA
12 SDT O P. D. Microprocessor communication SLAVE DATA
13 MCK I P. D. Microprocessor communication MASTER CLOCK
14 MREQ I P. D. Microprocessor communication MASTER REQUEST
15 SREQ O P. D. Microprocessor communication SLAVE REQUEST
16 DSP1_MI/DSP2_MI I P. D. DSP IC1, 2 (AC-3, DTS) MASTER IN
17 DSP1_MO/DSP2_MO O P. D. DSP IC1, 2 (AC-3, DTS) MASTER OUT
18 DSP1_CK_DSP2_CK O P. D. DSP IC1, 2 (AC-3, DTS) CLOCK
19~21 NO_MUTE_TIME0~2 I P. U. PCM NONE INPUT UNMUTE HOLD TIME SETTING
22~26 N. C. I P. U. –
27 PEAK_LEVEL O P. D. CLIP INDICATOR LED CONTROL
28 WIDE_0 O P. D. S-VIDEO WIDE/NORMAL CHANGEOVER CONTROL
(MONITOR OUT)
29~32 WIDE_I0~I3 I P. D. S-VIDEO WIDE/NORMAL DETECT0 (VIDEO4~1)
33 Vss – GND –
34 WIDE_I4 I P. D. S-VIDEO WIDE/NORMAL DETECT4 (AV AUX)
35~40 N. C. I P. D. –
41 DSP_SEL_DISABLE O P. D. DSP SELECTOR OUTPUT DISABLE (mute)
42 N. C. I P. D. –
43 SEL_ANALOG O P. D. INPUT DIGITAL/ANALOG DISTINCTION analog: L, digital: H
44~46 N. C. I P. D. –
47 SUB_MUTE O P. D. SUB MUTE CONTROL
48 N. C. I P. D. –
49 2090/2080 I P. D. 2090/2080 MODEL DISTINCTION
50 DSP_SEL1 O P. D. DSP SELECTOR TC74HC CHANGEOVER H: DTS, L: DOLBY
51 DSP_SEL2 O P. D. DSP SELECTOR TC74HC CHANGEOVER H: DTS, L: DOLBY
52 CS_OVL/ERR I P. D. CODEC OVER LEVEL/ERROR
53 CS_PDN O P. D. CODEC POWER DOWN
54 CS_FREQ1 I P. D. CODEC FS CHECK1
55 CS_FREQ0 I P. D. CODEC FS CHECK0
56 CS_CDIN O P. D. CODEC DATA OUT
57 CS_CS O P. D. CODEC CHIP SELECT
58 CS_CCLK O P. D. CODEC CLOCK
59 CS_CDOUT I P. D. CODEC DATA IN
60 RESET I – RESET
61 CS_AUDIO I P. D. CODEC AUDIO/NON-AUDIO DETECT H: DATA, L: PCM
62 CS_AC3 I P. D. CODEC AC-3 H: AC-3 DETECT
63 DSP2_DTS_DTCT I P. D. DSP IC2 (DTS) DTS DETECT H: DTS DETECT
6-2 Pin description
pin 19 20 21 TIME(s)
LLL 0
LLH 1
LHL 2
LHH 3
pin 19 20 21 TIME(s)
HLL 4
HLH 5
HHL 6
HHH 5
KRF-V7771D(K)COVER( 98.12.818:58 y[W 22
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

KRF-V7771D/V8881D/VR-2080/2090
16
CIRCUIT DESCRIPTION
Pin No. Pin Name I/O Connect Description
64 DSP1_GPI0 O P. D. DSP IC1 (AC-3) DSP MODE USE SETTING PARAMETER
65 DATA_IN I P. D. DIR OUTPUT DETECT H: DIGITAL DATA IN
66 N. C. I P. D. –
67 N. C. I P. D. –
68 Vdd – +5V
69, 70 X2, 1 – – CLOCK OSCILLATOR 4.23MHz
71 IC (Vpp) – GND –
72 N. C. – OPEN –
73 P07 – – –
74 AVdd – +5V –
75 AVrefo – GND –
76 DSP2_HREQ I P. D. DSP IC2 (DTS) HOST REQUEST
77 DSP2_SS O P. U. DSP IC2 (DTS) SLAVE SELECT
78 DSP2_RESET O P. D. DSP IC2 (DTS) RESET
79 DSP1_HREQ I P. D. DSP IC1 (AC-3) HOST REQUEST
80 DSP1_SS O P. U. DSP IC1 (AC-3) SLAVE SELECT
Pin No. Pin Name Description
3 SCL/CCLK Serial communication CLOCK
4 SDA/CDOUT Serial data line CS4226 îSUB uCOM
5 ADI/CD IN Serial data line SUB uCOM îCS4226
6 ACO/CS CS4226 CHIP SELECT
7 SPI/I2C Serial control format setting
8 PDN Powerdown Pin
9 AIN3R/AUDIO audio/non-audio detect
10 AIN3L/AUTODATA Input C bit, V bit H : Signal of AC-3, MPEG, DTS
11 AIN2L/FREQ0 Channel Status Freq. Bit
12 AIN2R/FREQ1 Channel Status Freq. Bit
30 OVL/ERR Input Analog : ADC clipping indicator
Input Digital : D/PDIF error indicator
32kHz 44.1kHz 48kHz Reserved
FREQ1 H L L H
FREQ0 H L H L
AC-3/MPEG Data Stream Input Exist None
AC3, MPEG, DTS 1 0
6-3 DIR A/D & D/A CONVERTER (CODEC) CS4226KQC (X08 : IC62)
6-3-1 CODEC CS4226
Main pin description
-= FREQ0/FREQ1
0AC3
IC62 (CODEC) IC66 (Sub u-COM)
INPUT SOURCE ∞CS_OVL_ERR ™PEAK_LEVEL OUTPUT
DIGITAL don't care L
ANALOG L L
HH
∞CLIP INDICATOR (X25 : D66) CONTROL
H : LED LIGHTING
KRF-V7771D(K)COVER( 98.12.818:58 y[W 23
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

KRF-V7771D/V8881D/VR-2080/2090
SYSTEM
CONTROL
FRONTSPEAKERS
(6-16Ω)
CENTER
SPEAKER
(6-16Ω)
SURROUNDSPEAKERS
DIGITAL IN
CD1
COAXIAL
VIDEO 4
COAXIAL
VIDEO 3
OPTICAL
VIDEO 2
OPTICAL
SL 16 XS 8
( SL 16 )(
XS 8 )
(6-16 Ω)
OPTICAL
DIGITAL OUT
SWITCHED
L
RAL RLC
R
B
SL 16
TEXT
IR
RECEIVER
IN
RELAY
CONTROL
IR
OUT
LCD
REMOTE
IR REPEATER OUT
TV
ON/OFF
SENSOR
L
RR
R
L
R
ANTENNA
AM
-FM 75Ω
GND
CD1
PHONO
MD/
TAPE1
REC
OUT
PLAY
IN
REC
OUT
PLAY
IN
PLAY
IN
PLAY
IN
CD2 /
TAPE 2
MONITOR
MONITOR
OUT
SURROUND
CENTER
SUB
WOOFER
L
L
R
VIDEO S VIDEO
VIDEO
SECOND ROOM PRE OUT
PRE OUT
AUDIO
VIDEO 3
VIDEO 4
PLAY
IN
VIDEO 2
VIDEO 1
L
R
AUDIO
PLAY
IN
REC
OUT
+
-
AUDIO
(A)
(B)
(C)
FM SG
FM SG
AG
MPX AG
AC voltmeter
Dummy antenna
Oscilloscope Distortion meter
No. ITEM INPUT
SETTINGS OUTPUT SETTINGS RECEIVER SETTINGS ALIGNMENT POINTS ALIGN FOR FIG.
1 DISCRIMINATOR
(A)
98.0MHz 1kHz,
±75kHz dev.
70dBf (ANT. input)
Connect a
DC voltmeter
between CN12 1
and CN12 2(X11)
MONO
98.0MHz L604 (X11) 0V (a)
2DISTORTION
(MONO)
(A)
98.0MHz 1kHz,
±75kHz dev. MONO
70dBf (ANT. input)
(B) MONO
98.0MHz L605 (X11) Minimum distortion (a)
3DISTORTION
(STEREO)
(C)
98.0MHz 1kHz,
±67.5kHz dev.
Selector : L or R Pilot
: ±7.5kHz dev.
70dBf (ANT. input)
(B) AUTO
98.0MHz IFT(RF
FRONTEND
: A1)
Minimum
distortion
(L or R) (a)
4 TUNING LEVEL
(A)
98.0MHz MONO
1kHz, ±75kHz dev.
15dBf (ANT. input)
(B) MONO
98.0MHz VR601 (X11)
Adjust VR601
and stop at the
point where ED1
(TUNED) goes
on.
(a)
1DISTORTION
(STEREO)
(C)
98.0MHz 1kHz,
±67.5kHz dev.
Selector : L or R,Pilot
: ±7.5kHz dev.
70dBf (ANT. input)
(B) AUTO
98.0MHz
IFT
(TUNER UNIT
: A601)
Minimum
distortion
(L or R) (a)
2 TUNING LEVEL
(A)
98.0MHz MONO
1kHz, ±75kHz dev.
15dBf (ANT. input)
(B) MONO
98.0MHz VR601 (TUNER UNIT)
Adjust VR601
and stop at the
point where
ED1 (TUNED)
goes on.
(a)
FM SECTION : Except M type SELECTOR : FM *Adjust NO.1 and NO.2 repeat.
FM SECTION :M type only SELECTOR : FM
SYSTEM CONNECTIONS
17
ADJUSTMENT
KRF-V7771D(K)COVER( 98.12.818:58 y[W 26
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3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

KRF-V7771D/V8881D/VR-2080/2090
No. ITEM INPUT
SETTINGS OUTPUT SETTINGS RECEIVER SETTINGS ALIGNMENT POINTS ALIGN FOR FIG.
AUDIO SECTION SPEAKER : A PREOUT : OFF PROLOGIC : ON
<1> IDLE CURRENT —
Connect a DC
voltmeter across
CN1 (each port)
1, 2 pin : L
5, 6 pin : R
3, 4 pin : SL
7, 8 pin : SR
9, 10 pin : C
(FRONT 2ch
MODE)
Volume:0
VR1(L)
VR2(R)
VR3(SL)
VR4(SR)
VR5(CENTER)
(X07-)
10mV
18
ADJUSTMENT
KRF-V7771D(K)COVER( 98.12.818:58 y[W 29
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

20
19
KRF-V7771D/V8881D/VR-2080/2090 KRF-V7771D/V8881D/VR-2080/2090
WIRING DIAGRAM
VR-2090
VR-2090
SURROUND UNIT
USED
VR-2090(K2,P2)
ELECTRIC UNIT
USED
(M1,Y1,C1,M2,C2) TYPE
USED
KRF-V7771D(J,M1,C1)/
KRF-V8881D(M2,C2)/
VR-2090(K2,P2)
(K2,P2) ONLY
VR-2090(K2,P2)
KRF-V8881D(C2)/
USED
KRF-V7771D(J,M1,C1)/
(X25-604X-XX) (A/7)
(X25-6133-00) (A/7)
(X25- ) (F/7)
(X08-285X-XX)
(X08-2903-XX)
(K2,P2) ONLY
(X11-3800-XX) (B/7)
(X11-3813-00) (B/7)
(X25-604X-XX) (B/7)
(X25-6133-0X) (B/7)
(X25- ) (D/7)
(X11-3800-XX) (C/7)
TUNER UNIT
(X11-3813-00) (C/7)
WH4 CN19
S1
XS8/
SL16
S601
DE-EMPHASIS
CH SPACE
WH3WH2
R1
J1
PHONO
L1
CN32WH2
VR-2090 (X25-6040-11)
KRF-V8881D (X25-6XXX-XX)
VR-2080 (X25-6040-10)
KRF-V7771D (X25-6XXX-XX)
J3
S1 VIDEO
J2
Lch
VIDEO
Rch
AV
AUX
E3
WH3
E2
WH5
CN11
KRF-V7771D (X08-2XXX-XX)
VR-2090 (X08-2850-11)
VR-2080 (X08-2850-10)
KRF-V8881D (X08-2XXX-XX)
OPTICAL
J15
J16
J17
OUT
DIGITAL
DIGITAL
IN
VIDEO2
OPTICAL
OPTICAL
VIDEO3
COAXIAL
VIDEO4
COAXIAL
CD
SL16
TEXT
SYSTEM
CONTROL
A3
A2
A1
J11
CN29
CN7
CN28CN22
CN10CN2
KRF-V8881D (X11-38XX-XX)
KRF-V7771D (X11-38XX-XX)
VR-2090 (X11-3800-11)
VR-2080 (X11-3800-10)
E18
WH4
CN27CN11
CN25 CN26
E10
WH3
E9
(AUDIO)
Rch 5
Lch 6
VIDEO 1
PLAY IN
J4
Rch 1
PLAY IN
VIDEO 2
Lch 2
Rch 3
REC OUT
VIDEO 1
Lch 4
PLAY IN
VIDEO 3
Rch 3
Lch 4
J3
Lch 2
VIDEO 4
PLAY IN
Rch 1
SECOND ROOM
PRE OUT (ROOM B)
J5
Rch 1
Lch 2
OUT
MONITOR
VIDEO 4
VIDEO 3
VIDEO 2
VIDEO 1
VR-2080 (X25-6040-10)
KRF-V7771D (X25-6XXX-XX)
KRF-V8881D (X25-6XXX-XX)
VR-2090 (X25-6040-11)
J11 (VIDEO/COMPOSITE)
VIDEO 1
1 PLAY IN
2 REC OUT
VIDEO 2
3 PLAY IN
4 REC OUT
J4
J5
PLAY IN
REC OUT
PLAY IN
1 PLAY IN
VIDEO 3
VIDEO 4
2 PLAY IN
OUT
3MONITOR MONI A
J7
ROOM
VIDEO
SECOND(B)
J9
CN11CN5
AM GND
FM 75 Ω
J601
1
11
1
9
1
9
133-01C2CHINA
133-00CHINA C1
ABB. UNIT No.
K2
P2 040-11
U.S.A.
CANADA
DESTINATION
COUNTRY
ABB. UNIT No.
M2
C2 040-22 CHINA
COUNTRY
DESTINATION
GENERAL MARKET040-01
040-21
M1
Y1 042-91
GENERAL MARKET
PX
K
ABB. UNIT No.
040-10
U.S.A.
COUNTRY
DESTINATION
CANADA P1
UNIT No.
DESTINATION
COUNTRY ABB.
JJAPAN
CHINA C1
200mV/47k
P1
1
115
113
131
P2CANADA
P1CANADA
903-01C2
CHINA C2
CHINA
903-00
850-21
C1
CHINA C1
CHINA M1
GENERAL MARKET
850-01J
JAPAN ABB.
PX Y1
DESTINATION
COUNTRY UNIT No.
852-91
ABB.COUNTRY
DESTINATION UNIT No.
U.S.A. K2 850-11
850-10
DESTINATION
K
ABB.
U.S.A.
COUNTRY UNIT No.
UNIT No.
DESTINATION ABB.COUNTRY M2 850-22
GENERAL MARKET
9
8
7
6
5
4
3
2
1
1
2
GND
OUT
VDD 3
OUT 1
3
VDD
GND 2
OUT
GND
VDD 3
2
1
19
91
1420
4120
1
1
13-00
13-00
C2CHINA
C1CHINA
ABB. UNIT No.
M2
C2
00-21
DESTINATION
COUNTRY
GENERAL MARKET
CHINA
00-01
C1
M1
CHINA
GENERAL MARKET
J
ABB.
Y1 00-21
COUNTRY
JAPAN
DESTINATION
PX
UNIT No.
K2
ABB.COUNTRY
U.S.A.
DESTINATION
P2CANADA 00-11
UNIT No.
UNIT No.
00-10
ABB.
DESTINATION
COUNTRY K
P1
U.S.A.
CANADA
111
41131
11341
1
9
1
9
133-01C2CHINA
133-00C1CHINA
ABB.
P1
K
UNIT No.
040-10
ABB.
Y1
M1 042-91
C1
J 040-01
040-21
UNIT No.
PX
COUNTRY
CANADA
U.S.A.
COUNTRY
DESTINATION
CHINA
GENERAL MARKET
JAPAN
ABB.
UNIT No.
P2 040-11
K2
M2
ABB. UNIT No.
C2 040-22
DESTINATION
U.S.A.
CANADA
COUNTRY
COUNTRY
GENERAL MARKET
DESTINATION
CHINA
DESTINATION
151151
E601
3
4
1
2
V
V
V
V
V
V
V
V
V
V
V
V
V
VV
wd/pcb98.12.821:12 y[W 1
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

21 22
WIRING DIAGRAM
KRF-V7771D/V8881D/VR-2080/2090 KRF-V7771D/V8881D/VR-2080/2090
(K,P1,K2,P2) TYPE
VR-2090(K2,P2) ONLY
DISPLAY UNIT
POWER AMPLIFIER UNIT
EXCEPT
EXCEPT
(K,P1,K2,P2) TYPE
TONE UNIT
USED
KRF-V7771D/V8881D
(M1,Y1,M2) TYPE ONLY
(X07-) (H/8)
(X25-604X-XX) (C/7)
VR-2080/2090(K)
KRF-V7771D/V8881D(M)
(X25-6133-XX) (C/7)
(X25- ) (G/7)
USED (J,K,P1,K2,P2,C1,C2) TYPE
USED (M1,Y1,M2) TYPE
(X07- ) (E/8)
(X25-) (E/7)
(X07-294X-XX) (A/8)
(X11- ) (G/7)
(X07-) (D/8)
(X07-) (B/8)
(X07-2983-00) (A/8)
(X07-) (G/8)
(X07- ) (C/8)
(X07- ) (E/8)
(X07-) (F/8)
(X11-3800-XX) (A/7)
(X11-3813-00) (A/7)
VR-2090(K2,P2) ONLY
(X11- ) (E/7)
(X11- ) (F/7)(X11- ) (D/7)
KRF-V7771D (X07-29XX-XX)
VR-2090 (X07-2940-10)
VR-2080 (X07-2940-10)
FFC
WH10
FFC FFC
WH7
E16 E17
CN33
OUTLETS
CN8
E6
WH1
E7
TEMP.
SW
(65 C)
65 C
TS1
E14
WH12
E12
CN7
E13E11 WH11
E10
WH10
E1
WH1
CN12
WH6 E6CN11
CN10
CN51
T1
J21
PHONES
3
2
1
4
3
2
1
KRF-V8881D (X07-29XX-XX)
TEST
PIN
IDLE
CN1
SW
(105 C)
TEMP.
COOLING
FAN
TS1
105 C
POWER
S1
S2
J11
Lch
J2
+
-
Rch
+
+
-
-
SURROUND SP.
CENTER SP.
J1
FRONT SP.
B SP.
Rch
Lch
Rch
Lch
-
+
-
+
-
+
-
+
A SP.
E2
WH2
CN15
CN21
CN1CN3
CN23
CN4
CN24
KRF-V8881D (X11-38XX-XX)
KRF-V7771D (X11-38XX-XX)
VR-2090 (X11-3800-11)
VR-2080 (X11-3800-10)
4
3
PLAY IN
WOOFER
SUB
CENTER
CD1
CD2/TAPE2
REC OUT
PRE OUT
SURROUND
Rch 1
J6
Lch 2
J2
Lch 2
Rch 1
Rch 3
Lch 4
Rch 1
J1
Lch 2
Rch 3
Lch 4
Rch 5
Lch 6
MD/TAPE
PLAY IN
REC OUT
CN16 WH3 E4
E7
WH5
E8
CN17 E5
WH4
E5
CN14
WH6
CN13
REPEATER
IR
J14
OUT
LCD
IR OUT
REMOTE
IR
RECEIVER
IN
12V 20mA
5V 10mA
TV
ON/OFF
J13
SENSOR
RELAY
CONTROL
12V 20mA
J12
CN6 WH6 E8
DESTINATION
P1
ABB.
K40-10
CANADA
COUNTRY
U.S.A.
UNIT No.
WH14
WH15
F1
F2
F3
F4
1
4
1
4
131
1
2
F6
WH25
WH26
11
9 9
1
3
1
3
3
1
3
1
3
1
151
1
15
1
15
1
1
6
6
1
29
1
29
CHINA C2
C1
CHINA
0V
0V
120V
0V
120V
(C1,C2) 220V 50Hz
(J) 100V 50/60Hz
(K,P1,K2,P2) 120V 60Hz
5:
0V
RED WH31 WHT WH32
5
3
1
WH27
15
13
14
17
11
12
10
23
22
21
20
19
16
18
P2
P1
6
5
4
3
2
WH17 WHT
WH16 YEL
WH18 BLK
RED
GRY
40-01JJAPAN
40-21
83-00
43-01CHINA C1
M1GENERAL MARKET
UNIT No.
42-91Y1
ABB.COUNTRY
PX
DESTINATION
40-21
83-00
UNIT No.
43-01
M2
C2
ABB.COUNTRY
GENERAL MARKET
CHINA
DESTINATION
K2
P2 40-10
UNIT No.
U.S.A.
COUNTRY
DESTINATION
CANADA
ABB.
10
9
8
Cch
SRch
5
6
4
Rch
SLch 3
2
1
Lch
7
: AC100V 50/60Hz
: AC220V~ 50Hz
50/60Hz
: AC110-120V/220-240V~
: AC120V 60Hz
(J)
(C1,C2)
(M1,Y1,M2)
(K,P1,K2,P2)
BRN
WH20
WH19
YEL
BLU
ORG
BRN
WH21 YEL WH23 WHT
110V-
220V-
120V
240V
WH28 YEL WH29 RED WH30 VIO WH24 GRY
T1
F5
WW
P3
151
151
151
115
9
9
1
1
18
18
1
1
13-00
13-00
C2CHINA
C1CHINA
M2
ABB. UNIT No.
00-21
C2CHINA
COUNTRY
DESTINATION
GENERAL MARKET
00-01
C1CHINA
JAPAN J
Y1
ABB.
M1
UNIT No.
00-21
PX
GENERAL MARKET
DESTINATION
COUNTRY
K2
ABB. UNIT No.
00-11
P2
U.S.A.
CANADA
DESTINATION
COUNTRY
K
P1 00-10
UNIT No.
U.S.A.
COUNTRY
DESTINATION
CANADA
ABB.
9
1
1
9
1
4
1
4
1
55
1
115
151
13
1
3
1
3
V
V V
V V
V
V
V
V
V
V
V
V
VV
V
V V
V
V
V
wd/pcb98.12.821:12 y[W 2
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

ABDFHJCEGI
2
1
3
5
7
4
6
X07-294X-XX A/8 (J70-1153-11)
CENTER
SPEAKER
SURROUND
SPEAKERS
LR
BA
FRONT SPEAKERS
LRLR
BB EE EE BBBBEE EEBB
BB EEEE EBBBBE EEBB
129
B
E
B
E
X07
H/8
X07
G/8
1
3
1
3
X07 E/8
X07 B/8
X07 F/8
X07 D/8
IGO
EB
X07
C/8
BE
12
AC OUTLET
1
6
EBB
EB
EB
EB
EEB
110
EBEB
EBEBEB
BE
BE
BE
BE
EB
B
E
B
E
13
1
6
EB
1
15
EB
E
B
E
B
EB
B
E
B
E
13
EBB E E E BB
1
31
3
POWER
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD(Component side view)
23 24
wd/pcb98.12.821:12 y[W 3
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299