Kenwood RXD-790 Service Manual page 27

U V
L
6 5 4 3 2 1
CN3
6 5 4 3 2 1
R88 R89
( 5 )
( 6 ) 13K 10K
5.0V
10.0V
3.7V
5.1V
IC3
+
AMP3
4ch
-
BTL
- -
DRIVE
+
+ +
AMP2
AMP1
AMP8
AMP7
+ +
+
- -
-
AMP6
5.3V 5.4V 4.6V
3.6V
4.8V
( )
21
( )
20
R96
( 25 )
13K
( 26 )
C11 220P R97 10K
R24 110K C12
0.047
R25
110K
C19 R34
0.033 6.8K
+
C20
100u
2.6V
10
0.8V
2.6V 2.7V +
2.6V
13
2.9V TAO
2.6V
2.4V 14
2.6V SL+
2.6V
15
SL-
2.7V
16
SLO
2.6V
17 R38
ISET
1.3V
IC1
240K
18
VCC
RF/ 19
CLK 17
SERVO
20
XLT 16
(BOTTOM VIEW)
21
DATA 15
22
XRST
23
5.0V
2.2V C.OUT 14
24
5.2V
1.9V
SENS 13
2.6V
1.1V
D4
5.0V
D5
1.0V
4.0V
R39
R41 1.5K
1.3K
3.4V
CAUTION: For continued safety, replace safety critical components only with manufacturer's rec-
ommended parts (refer to parts list). indicates safety critical components. For continued protec-
tion against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of elec-
tric shock, leakage-current or resistance measurements shall be carried out (exposed parts are
acceptably insulated from the supply circuit) before the appliance is returned to the customer.
W X
M N
1 2 3 4 5 6 1 2 3
CN4 CN5
1 2 3 4 5 6 1 2 3
R74
R70 390 1.2K
0.4V
0V
4.6V R122
IC4 12.3V
C40 6.8
1/4W
0.01
0.5V
LOADING
0.3V 0.3V
ROTARY
MOTOR
DRIVE
0V
5.9V C41
( ) 100u16
6
+
R71 R69
12.3V
R121
620 680 6.8
TRAY IN 1/4W
: 5.0V
R79
4.7K C34
330u
R55
6.3
5.2V
10K
2.7V
+
(BOTTOM VIEW)
2.7V R53 2.7V
DSP/1bit DAC
3.3K
2.7V
IC2
24
DIGITAL CLV DIGITAL PLL
2.7V 23
22
21
5.2V
20
CLOCK
GENERATOR
19
18
5.2V
17
( 17 )
16
( 16 )
15
SERVO AUTO
( 15 )
SEQUENCER
14
( )
14
13
( )
13
12
R48 C63 100P
1K 11
C64 100P
5.0V
R49 10
( 10 )
16K RAM
1K C65 100P
5.0V
R50
9
( 9 )
1K
8 3.9V
CPU
7 INTERFACE SUB CODE
( )
7
PROCESSOR
6
5.0V
C69 100P
R52 5
( )
5
1K 4
(
4 )
3
LPF
5.2V 2
1
2.5V
( 1 )
5.0V
2.4V
2.5V
R114
100K
X1
C48
16.9344
MHz
270P
The DC voltage is an actual reading measured with a high impedance type volt-
meter as the AM/FM signal generator is specified to the conditions as shown in
the list below. The measurement value may vary depending on the measuring
instruments used or on the product. The value shown in ( ) is actual reading
measured in the AM made.
Y Z
P
1 2 3 4 5 6
CN6
1 2 3 4 5 6
1
2
MUTE
TRAY OUT ON:5.4V 3
( )
: 5.0V OFF:0.6V 3
4
( )
4
5
(
5 )
0V 6
IC4
TRUE TABLE R67 1K
7
IN1 IN2 OUT1 OUT2 IN3 IN4 OUT3 OUT4
8
0 0 0 0
OPEN OPEN OPEN OPEN
1 0 H L 1 0 H L 4.8V
0 1 L H 0 1 L H
1 1 L L 1 1 L L
12.3V
D10 D11
0.01
+
TRAY OUT
2.6V 0.9V
2.6V : 5.0V
1
P3
2
( )
2 P4
2.6V 3
(
3 ) P5
4
VSS
TRAY IN
5
ASYMMETRY
: 5.0V ( 5 ) P6
CORRECTOR
6
( 6 ) P7
41
7
( )
42 7 P8
0V
43
44
DIGITAL
45
FILTER
+ 46
1bit DAC
47
48
49 49
R125
22K Q7
50 ON:4.2V
OFF:0V
R127
D/A 51
ON:4.8V
INTERFACE 2.2K
52 OFF:0V
Q9
53
54
55
ERROR
CORRECTOR
56
57
58
2.4V
59
EFM
60 C51
DEMODULATOR
10u50 R109
61
+
1K
62
63
DIGITAL OUT
64
5.2V
0V
2.5V 2.5V
MUTE MUTE R58
C47
ON:4.9V ON:5.2V
OFF:0V OFF:0.6V 4.7K
270P
D2
D3
C52 10u50 R110
+
1K
+
RXD-790/V860/V890 (2/8)
AA AB
IC6
MECHA SW
CONTROL
16
SI VCC
5.0V
15 R65 1K
MUTE S/L
5.0V
14 R66 1K
UP-SW DPSS
0.4V
13
LD-SW QH
4.9V
12
UNLOAD DN-SW 12
5.0V
11
CKINH STSW 11
0V
10
CK PSSW 10
0V
9
GND CLR
C38 0.01
12.3V
5.0V
R59 R83
1 1/4W 3.3 1/4W
4.8V
D18
5.0V
5.2V
Q5
R60
4.7 1/4W
5.2V
5V AVR
4.5V
C37
IC5 5.0V
IC5
EXPANDER
14
VDD
5.0V IC
13 W27
(MOTOR
P2
5.0V
12 DRIVE
P1
CONTROL)
0V
11
CLR
5.0V
R62 220
10
STB
R63 1K
9
CLK
0V
R64 1K
8
C57 0.01
DATA
C35
1u50
+
C55
0.01
MUTE Q8
ON:4.8V
ON:4.2V
OFF:0V
OFF:0V
R128
2.2K
Q10
C80 10u50
+
C79
10u50
+
RXD-790/V860/V890
Y39-2600-20
AC AD
CN7
( )
1 1 SCOR
2 IC-STB
X14-A/2
( 4 ) 3 SUBQ
-WH4
( 9 ) 4 CD-DATA
7/7
( 5 ) 5 SQCK
6 CD-CLK
A
7 PS-SIN
8 PS-LOAD
( )
7 9 SENSE
( )
10 10 CD-XLAT
11 IC-CLK
12 SBUSY
13 SDATA
R51 1K
14 CLR
E1
11 MOTORGND
10 REG +12V
9 u-COM +5V
X09-A/5
-CN1
8 u-COM GND
6/7
7 IC-DATA1
6 DPSS
B
5 DSP GND
5.7V
4 DSP +5.6V
3 Rch
2 A-GND
1 Lch
D15
D14
D8
D9