Kenwood RXD-790 Service Manual page 36

CW CX
SURROUND UNIT
(XO8-28XX-XX) 00-20 : RXD-790(K,M,I,X,H)/RXD-V890(M,I)
32-10 : RXD-V890(V)
1
Rch
TEST POINT
Lch
TEST POINT
DATA 1
2
D.GND 2
WH3
CE 3
E2
3 X09-A/5
CE 9
-CN18
DATA 8
5/8
CLK 7
PRO-STB 6
WH2
K
DOLBY ON 5
D.GND 4
CS RELAY 3
R7 2.2
-12V 2 -12V
1/4W
PROTECT 1
IC7
SELECTOR
+
4
STEREO P.LOGIC
1
PL-L VDD
C107
0.01 2
6.1V
3
LOUT RIN
4
6.1V ROUT
5
LIN PL-R
6
0V
INH
7
VEE A
+ + 8
VSS B
R63
100
4.8V
E1
+
Q7
LIN 11
5
X09-A/5
GND 10
-CN4
RIN 9
5/8
ROUT 8
WH1 +12V 7 +12V
L
LOUT 6
+22V 5 +22V
POWER 4
E.VOL/ATT 3
A.MUTE 2
COUT 1
32.4V
+32.4V
6
X09-C/5
RELAY
-E6
CN1
DRIVE
K1
6
5/8
5
4 -32.5V
P
3
D5
+
2
1
P1
7
CY CZ
X1 8MHz
+
5.2V
2.3V
VDD ADM
ADM-CONT
A
B
A B
20K
40KHz
IN-FILTER
A
DEC
0.7V
VSS VCC
1.9V
50K
LIN
9.3V
+
C16 47u16
+
C45 0.1
+9V
R35 1K
R36 1K
R37 1K 4.6V
5.0V
Q18
5.0V
-12.5V
0.7V
R71
4.7K
6.1V
Q17
9.3V
12.1V
Q3 Q4
16
+12V
15
14 6.0V
13
12 6.1V
11
10 +
9 0V
+ + + + +
+
R8
+B
3.3 1/4W
-12.5V
+32.4V
R46 220
2W -4.5V
R55 Q6
3.9K 2W R57
-1.5V
1K
+
MUTE
0.7V
DRIVE
R64
0V 4.7K
4.0V
Q5
+23.8V
0V
+
-32.5V
DA DB
+B
+ Sch
+ +
4.7V
4.7V SOUT
AGND
VREF
A B A B
INV-PHASE
SRAM
L+DELAY R+DELAY
IC2
B A
7K/5K VOL DOLBY
DC- SURROUND
/MUTE
OUT-
OUT
FILTER
L-R
S-TRIM
L+R
B-NR
-6dB
B A B A B
4.7V 4.7V
50K SIN
RIN REVOUT
+
Sch
+4.9V
IC1
+ +
DOLBY
5.0V
PRO
LOGIC
BSW11
CONTROL
BSW2
BSW2
(BYPASS-11)
B A B A
CTRIM
BSW2 BSW2
BSW2 BSW2
B A B A
CMODO
B A B A
LPF
NOISE
5.1V
CH
NOISE
FILTER
4.6V
4.6V
4.7V
+
+ + +
+ + + + +
R3
47K
R2 3.6K
R1 3.6K
+
+
DC DD
Sch TEST POINT Cch TEST POINT
-12.5V
12.1V
+4.9V
R94 R96
0V
Cch 470 680
8
6
- 7
0V 5
+
C90 4.7u35
0V
0V
C89 4.7u35
IC5
0V 3
(1/2)
+
2
-
4
R95
0V
680
+
+ + +
+
+
+
MUTE XXX
XXX XXX
RECT
LOG DIFF
DUAL T
RECT
CONTROL
VOA VOA VOA VOA RECT
LOG DIFF
XXX XXX
RECT
XXX
VOA VOA VOA VOA XXX
LPF
VCC
GND
+ + + + +
R4 47K
0V
12.1V
+B
8 C13 R19 R47
0V 2
1 10u35 2.2K 2.2K
-
3
+
+
ATTN.
IC3
(-6dB) MUTE
(2/2)
R43
-12.5V
220K
Q9
Q10
R42
IC3 220K
(1/2)
0V 5 4 C14 R20 R48
7 10u35 2.2K 2.2K
+
6
- +
0V
0V
+32.4V
+23.8V
-32.5V
DE DF
IC4
C88
0.01
ELECTRIC
VOL.(C.SURR)
IC5
(2/2)
5.1V
0.3V
12.1V
+B
1
12.4V
-12.5V -12.5V
IC6
31.6V
R30 33K
R29 33K
+
C19 R89
4.7u35 560 + +
+
Q1
Q2
C20
4.7u35 R90 R91 100
+
560
+32.4V
+23.8V
-32.5V