Kenwood RXD-790 Service Manual page 28

AE AF
1
COM(-) Rch(+)
BLUE RED
Lch(+)
WHITE
(PB HEAD)
(A MECHA)
DECK MECHA (RVStype) D40-1510-05
A(PB) MECHA
2
Lch
Rch
(A)
(B)
M34W-6C
(+)
(-)
SOL
3 470
LED
LED 470
PHOTO
REFLECTOR
2.2K 3 4
2 1
PACK
CrO2
PLAY
4
B(RPE) MECHA
EX
Lch
Rch
(A)
5
(B)
M34W-6C
(+)
(-)
SOL
470
LED
470
LED
PHOTO
REFLECTOR
2.2K 3
4
6
2 1
PACK
RVS REC
CrO2
PLAY
FWD REC
7
AG AH
Lch(+)
Rch(+)
WHITE
RED
E(+)
GND
BLUE Rch(-) GRAY
Lch(+) BLUE
E(-)
WHITE E(+)
BLACK
Rch(+)
GRAY
RED
E(-)
BLACK
Lch(-) Lch(+) E(-)
Lch(+)
GREEN BLACK
WHITE
WHITE
E(+)
GND
BLUE GRAY
Rch(+) Lch(+)
RED
WHITE
(HEAD PCB) (RPE HEAD) (HEAD PCB)
(B MECHA)
ROTARY HEAD
A
CN1 C3
10u16
L 3
+
PLAYBACK
LEVEL
3 L
L
2 G G 2
VR8 220(B)
1 R
R
C4
10u16
R 1
+
1.4V
1 SOL
2 NC
3 S-REEL LED
4 T-REEL LED
5 MOTOR(+)
6 MOTOR(B)
B
0V
CN2
7 MOTOR(A) 11.5V
GND 6
8 NC
EH 5
9 PACK
L PLAY 4
PHOTO
10
EMITTER
L REC 3
11 MOTOR(-)
PLAY
REC
12 CrO2
13 PLAY
R REC 2
14 NC
B PLAY
R PLAY 1
15 COM B REC
10u16
PLAYBACK
LEVEL
6 GND
5 EH
4 L PLAY
3
L REC
2 R REC
BIAS
1 R PLAY
CURRENT
R L
10u16
12.3V
BEAT
Q9
CANCEL
1 SOL
0V
2 RVS REC
0V
C68 Q10
3 S-REEL LED
R60
470P
4 T-REEL LED
5.6K
OV
5 MOTOR(+) R61
Q11
5.6K
0V
0V
6 MOTOR(B)
7 MOTOR(A)
L7
8 NC
4
9 PACK 5
PHOTO
10
6
EMITTER
11 MOTOR(-)
12 CrO2
13 PLAY
REC NOR
14 FWD REC
15 COM
AI AJ
(X28-2880-20)
Lch(-)
GREEN
Rch(-)
BLUE
Rch(+)
RED
Rch(+)
RED
Rch(-)
BLUE
Lch(-)
GREEN
9.0V
R63
1.4V IC2(2/2)
5.4V
8 4 1K
6
+
1.4V 7
-
5
L
R5 6.8K R7
150K
C7
R3 22u16 C9
+
75 0.022
VR7 220(B)
C8
R4 22u16 C10
A-PB EQ
+
75 0.022
R6 6.8K R8
0.9V
150K
R
2
- 3
1
+
5.5V
IC2(1/2)
R62
100
IC4
1/4W
B
PLAY/REC
HEAD SW
B PLAY : 0V
B REC : 5.0V
0V
L5 10mH
C49 220P R35
: 0V 15K
: 10.0V
L6 10mH
C50 220P R36
15K D3
: 0V R64
8.6V
: 10.0V
IC3(2/2) 5.4V 1K
+ 1 4
3
+
C19
1.4V 2
-
5
0.9V
R15 6.2K R17
150K
C23
R13 22u16 C25
D4
+
L
75 0.022
STOP/PLAY : 0V
VR1 220(B)
REC NOR : 6.8V
HI : 12.3V
VR2 220(B) C24
METAL : 9.2V
R14 22u16 C26
R B-PB EQ
+
75 0.022
R16 6.2K R18
150K
7
0.9V
C20
- 6
8
+
5.2V
+
IC3(1/2)
1.4V
1
R53
BIAS AVR
Q5
10
12.3V
1/4W
0V
Q12
Q1
Q7,8
BIAS
Q7
OSC
0V
0V
EH
3
0V
2
Q8
1
15 14 13 12 11
CN3
: 6.0V REC NOR : 0V
HI : 9.1V HI : -0.4V
METAL : 9.1V METAL : -0.4V
A-DECK
AK AL
6.1V 2.3V
1.3V
IC1
A/B SEL
HAED AMP
DOLBY
L1
C33 1000P
1 6
43
R23 3.9K
C31
2
C35 NC
0.47u50
6.0V 44 RIN(L)
6800P 3 4
+
C27 3300P
C29
BIN(L)
R19 1.5K 1u50 6.0V 45
+
15K
C53 4700P 6.1V 46 ABO(L)
C11 3300P 47
NC
R9 1.5K C15 1u50 6.0V 48 AIN(L)
+
C55 1u50
5.7V 49
RIP
+
50
GND
51
15K
C16 GND
R10 1.5K 1u50 6.0V
52 A IN(R)
+
C12 3300P
C54 4700P
6.1V 53 ABO(R)
R20 1.5K C30 1u50 6.0V 54 B IN(R)
+
C28 3300P 55
NC
C36
L2
RIN(R)
6 0.47u50 6.0V 56
1
C32 R24 3.9K +
2
6800P 3 4
C34 1000P
0.7V 6.1V 0V
STOP/PLAY : 0.3V
REC NOR : 6.1V
HI : 12.3V
METAL: 9.2V
0V
A TAPE
Q2
SPEED
0.7V 0V R66
(A)
Q3
4.7K
R65 R67
12.3V
B
4.7K 2.2K
MOTOR
A A
DRIVE
MOTOR SOLENOID
DRIVE
ON:
PLAY
ON:
PLAY
11.0V
10 9 8 7 6 5 4 3 2 1 15 14 13 12 11
CN4
B-DECK
AM AN
R37 C56
100K 0.01
6.0V
6.1V 6.1V 9.0V
6.0V
6.1V
EQ
28
100K MS
NC
DET
MS OUT 27 1.5V
BIAS N 26 1.0V
25 1.0V
BIAS C
DOLBY
24
B-NR
NC
23
VCC
+ LPF
22
VCC
21
DOLBY
LM ON/OFF
B-NR
20
REC/PB
19
NR ON/OFF
18
NC
17 0V
RM ON/OFF
16 0V
BIAS ON/OFF
15
EQ
6.1V NC
6.0V
6.1V 0V 0V 3.9V
R73 10K
R76 10K
B TAPE
0V
SPEED
Q4
R68
2.2K
B
SOLENOID
12.4V
10 9 8 7 6 5 4 3 2 1