Kenwood KRF-V7771D Service Manual page 7

Q Q
3 7 6 3 1 5 1 5 0
IC42 TC9163AF-1
IC43
IC44
L1,R1 L4,R4
TONE
CONFIG-2
LOW BOOST
L3,R3
IC47,48
IC21 BUFFER
INV (X11)
L2,R2 L6,R6
IC49
VOLUME
IC25(1/2)
VOLUME
IC23
L8,R8
VOLUME
IC25(2/2)
VOLUME
ROOM B
IC27
IC28
VOLUME
VR-2090
T E
L 1 3 9 4 2 2 9 6 5 1 3
(X25)
IC11,12
(S1-VIDEO)
SN761200Nx2
Ω
1Vp-p/75
Y
VIDEO 1 C
Y
VIDEO 2
C
(X25)
Y
(VISUAL)
PLAY VIDEO 3
C Ω
1Vp-p/75
VIDEO 1
Y
VIDEO 4 VIDEO 2
C
COMP
VIDEO VIDEO 3
PLAY
Y
(FRONT)
VIDEO 4
AV AUX C
(FRONT)
Q12
AV AUX
Y
VIDEO 1
VIDEO 1
C COMP
VIDEO
Q14
REC
VIDEO 2
REC
Q11
Y
MONITOR OUT
VIDEO 2
C
Q13
Q31
Q16
MONITOR OUT B
(SECOND ROOM)
Y
SECOND(B)
V-MUTE
MONITOR OUT
ROOM
Q30
C
VIDEO
Q15
w w w
.
KRF-V7771D/V8881D/VR-2080/2090
AMP
Q1,2 Q3,4
IC51 IC22
-20dB
MUTE
ATT
IC53 IC26
Q9 Q11
(1/2) (1/2)
-20dB
MUTE
ATT
Q5,6 Q7,8
IC52 IC24
K1
-20dB
MUTE
ATT
IC53 IC26
Q10 Q12
(2/2) (2/2)
-20dB
MUTE
ATT
Q5,6
MUTE
VR-2090
IC13
TC74HC4051AP
IC51
SN761200N
Q52
Q51
Q55
(OSD)
IC52(2/2)
V-MUTE
IC52(1/2)
Q17
VR-2090
x a o
y
i
KRF-V7771D/V8881D/VR-2080/2090
BLOCK DIAGRAM
8
(X25) (X07)
5ch SP. OUTPUT
Ω
KRF-V7771D 26.8V/6
Ω
KRF-V8881D 27.9V/6
VR-2080
Ω
24.5V/6
VR-2090
PHONES
(X25)(X07)
29dB POWER
AMPLIFIER
K1
FRONT A
L,R
(X25)(X07)
29dB POWER
AMPLIFIER
K4
C
SPEAKERS
(X25)(X07)
29dB POWER
AMPLIFIER
K3
SL,SR
K2
FRONT B
ROOM B SP
BUFFER
IC31(1/2)
Q35
PRE OUT
MUTE C
Ω
1.0/1K
BUFFER
IC30
Q33,34
Q Q MUTE SL,SR PRE OUT
3 7 6 3
BUFFER
IC31(2/2) Q36
MUTE SW
Q1-4
MUTE SECOUND ROOM PRE OUT
VR-2090
u 1 6 3
.
7
2 4
9 9 8
(X25) IC61 (X25) ED1
(u-COM STAGE)
51
LED 6 FL
(X08) J15
FL DRIVER 7
TX RX
KEY MATRIX
SL16 TEXT
(X08) J16
DATA IN .STB
SDATA SBUSY
DATA OUT .RESET
SYSTEM CONTROL
(X25) A1
CLK
REMOTE SENSOR
(X08) J17
SYSTEM CONTROL
VR-2090 (K,P)
PEAK LEVEL
LED
(X11) J12
(X08)
IC86
RELAY CONTROL
SUB u-COM
DATA-OUT DATA-IN TV or LIGHT
DTS MDT SENSOR
MISO/SDA
SDT
7 SCK/SCL HREQ
MCK
RESET GPI00
MREQ
MOS GPI02 (X08) IC69
AC-3
SREQ
SS MISO/SDA
6
RESET
HREQ
6
CONFIG (X08) IC67
SCK/SCL MISO/SDA MAIN u-COM
7 RESET
HREQ
MOS REMOTE
GPI00
SS
u-COM
DATA
DAC/ADC 10
CLK
STB (X08)
CDOUT .FREQ1 .ERR
IC53
CCLK .FREQO .AC-3
CS .PDN SIRIAL/
CDIN .AUDIO
PARALEL
FAN FRST/SLOW
(X08) IC68 DATA
TUNER CLK
FAN ON/OFF
RDS
TUNER 9
VIDEO SEL. 8
DIGITAL INPUT SEL. 3
WIDE V-MUTE
VIDEO SYNC 4
TONE CONT. 3 FAN 2
PROTECTION RELAY 5(A,B,CS,TR,POWER)
(X07)
Q154
SE-RLY RELAY
DRIVER
D301-304
1 5 1 5 0 8 9 2 4
(X07) IC31
+5.6V AVR
+
To
u-COM
GND
FINAL TR.
+
GND
+ D251
FINAL TR.
To
POWER
EXCEPT K.P
D252
PRE DRIVE
GND
K5
PRE DRIVE
D311
Q311
-35V AVR
D312
(X25)
IC83 Q86
D86
To VIDEO 5 AVR AVR
Q83
D81
+17V AVR
+
To
ANALOG GND
+
Q84
TUNER
-17V
AVR
To VIDEO 5
AVR AVR
IC82 Q85
(X08)
D88
+5.0V AVR AVR
To
+
IC57,61, IC84
DSP
63-65,73
SRAM
DRAM
GND
D82
+30V
m
+
To FAN
GND
c o
FIL
FIL
2
9 9
VR-2090 (K,P)
(X11) J14
REPEATER OUT
(X11) J13 (1/2)
IR RECEIVER IN
(X08) Q64-66 (X11) J13 (2/2)
455kHz FILTER IR LED REMOTE OUT
(X11) D21-24
OUT LED
(X07) Q211-215
FAN DRIVER FAN
EXCEPT K.P
STROKE SW
(X07) T1
S1 K6
9 8 2 9 9
Q301
POWER-RLY
RELAY
DRIVER
AC OUTLET
VR-2080
8