Kenwood RXD-501 Service Manual page 24

U V
Rch(+)
RED
GND
Rch(-)
BLUE
Lch(+) BLUE
WHITE E(+)
GRAY
1
COM(-) Rch(+)
E(-)
RED
BLUE
BLACK
Lch(-)
Lch(+) Lch(+)
GREEN
WHITE WHITE
GND
BLUE
Rch(+)
RED
(PB HEAD) (HEAD PCB) (RPE HEAD)
(A MECHA)
ROTARY HEAD
A
CN1
Lch 3
DECK MECHA (D40-1581-X5)
A(PB) MECHA
2
3 Lch
Lch
2 GND GND 2
Rch
1 Rch
(A)
(B)
MS15U
(+)
Rch 1
(-)
SOL
1 SOL
2 NC
3 NC
4 NC
+12V 5 MOTOR(+)
3
PHOTO
REFLECTOR
2.2K 3
4
6 MOTOR(B)
B
7 MOTOR(A)
CN2
2 1
8 NC
GND 6
PACK 9 PACK
EH 5
PHOTO
10
L PLAY 4
EMITTER
11 MOTOR(-)
L REC 3
CrO2 12 CrO2
PLAY 13 PLAY
14 NC
R REC 2
15 COM
R PLAY 1
B(RPE) MECHA
4
6 GND
ERASE
5 EH
4 L PLAY
Lch
3
L REC
2 R REC
Rch
1 R PLAY
(A)
(B)
MS15U
(+)
(-)
SOL
1 SOL
2 RVS REC
5
3 NC
4 NC
+12V 5 MOTOR(+)
PHOTO
REFLECTOR
2.2K 3 4
6 MOTOR(B)
7 MOTOR(A)
2 1
8 NC
PACK 9 PACK
PHOTO
10
EMITTER
RVS REC
11 MOTOR(-)
CrO2 12 CrO2
PLAY 13 PLAY
FWD REC 14 FWD REC
15 COM
6
CAUTION: For continued safety, replace
safety critical components only with man-
ufacturer's recommended parts (refer to
parts list). indicates safety critical com-
ponents. For continued protection against
risk of fire, replace only with same type
and rating fuse(s). To reduce the risk of
The DC voltage is an actual reading measured with a high impedance type voltmeter with a cassette loaded at playback mode. The measurement
electric shock, leakage-current or resis-
value may vary depending on the measuring instruments used or on the product. Bias circuit DC voltage is measured while in the record mode.
tance measurements shall be carried out
(exposed parts are acceptably insulated
7
from the supply circuit) before the appli- DOLBY and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. Noise reduction circuit made under license from
ance is returned to the customer.
Dolby Laboratories Licensing Corporation.
W X
CASSETTE MECHANISM UNIT
(X28-2960-10)
Lch(+) Lch(-)
WHITE GREEN
E(+) Rch(-)
GRAY BLUE
E(-) Rch(+)
RED
BLACK
Rch(+)
RED
Lch(+) E(-)
Rch(+)
BLACK RED
WHITE
E(+) Rch(-)
GRAY BLUE
Lch(+) Lch(-)
WHITE GREEN
(HEAD PCB)
(B MECHA)
9.0V
IC2
R63
(2/2) +B +12V
1.4V
C3 R71
1K
5.4V
10u16 100 8
4
6
+
+ 7
1.4V
-
5
PLAYBACK R5 6.8K R7
L
LEVEL
150K
C7
R3 22u16 C9
L
+
VR7
75 0.022
220(B)
VR8 C8
220(B) R4 22u16 C10
R A-PB EQ
+
75 0.022
R6 6.8K R8
0.9V
150K
R
2
C4 R72
- 3
10u16 100
1
+
+ 5.5V
1.4V IC2
(1/2)
R62
+B +12V
100
IC4 1/4W
B
PLAY/REC
HEAD SW
B PLAY : 0V
B REC : 5.0V
C69 0V R103
1u50 1K
0V
11.5V +
L5 10mH
C49 R35
220P 15K
PLAY : 0V
REC : 10.0V L6 10mH
C50 R36
220P 15K
R64 D3
B PLAY : 0V
8.6V
IC3 +B
B REC : 10.0V
1.4V
1K
(2/2) 5.4V
C19 8 4
+
6
+
10u16
7
-
5
0.9V
R15 R17
6.2K 150K
PLAYBACK
LEVEL C23
R13 22u16 C25
L +
75 VR1 0.022
220(B)
BIAS
VR2 C24
CURRENT C26
R14 220(B) 22u16
B-PB EQ
R
0.022
75 +
R L
R16 R18
6.2K 150K
2 5.2V
0.9V
C20 - 3
10u16 1
+
IC3
+
1.4V
(1/2)
) 12
(
12.3V
+12V +12V
STOP/PLAY : 0.3V
REC NOR : 6.1V
CrO2 : 9.2V
BEAT
Q9
CANCEL
R53
BIAS AVR
12.3V
Q5
0V 10
0V 1/4W
0V D4
C68 Q10
R60
470P
Q12
5.6K
OV
R61
Q11
5.6K
REC NOR : 0V
0V
CrO2 : -0.4V
0V
Q7,8
Q7
BIAS
0V OSC
REC NOR : 6.0V
CrO2 : 9.1V
L7
4 3
0V
5 2
Q8
6 1
REC NOR : 6.0V REC NOR : 0V
EH
CrO2 : 9.1V CrO2 : -0.4V
RECORDING LINE
SIGNAL LINE
GND LINE
+B +B LINE
-B -B LINE
Y Z
+12V +12V
+12V
R21
1.5K
R22
1.5K
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 44
6.0V RIN(L)
6800P 3
4
C27 3300P +
C29
45 BIN(L)
R19 1.5K 1u50 6.0V
+
C53 4700P 6.1V 46 ABO(L) 15K
C11 3300P
47
NC
C15
R9 1.5K 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
6 0.47u50 6.0V 56 RIN(R)
1
C32 2 R24 3.9K +
6800P 3 4
C34 1000P
0.7V 6.1V 0V
STOP/PLAY : 0V
REC NOR : 6.8V
CrO2 : 9.2V
+12V
0V
Q2
A TAPE
0.7V 0V R66
SPEED
Q1 Q3
(A) 4.7K
R65 R67
B
4.7K 2.2K
MOTOR
D1
0V
A A
DRIVE
MOTOR SOLENOID
DRIVE
ON:
12.3V
PLAY
ON:
PLAY
11.0V
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 15 14 13 12 11
CN3
A-DECK B-DECK
AA AB
+12V
+12V
+B
R37 C56
100K 0.01
6.0V
6.1V 6.1V 9.0V
6.0V
6.1V
28
EQ
NC
27 1.5V
MS OUT
100K MS
DET
R43
10
26 1.0V R41 5.1K
BIAS N
1/4W
+12V
R42 750
BIAS C 25 1.0V
DOLBY
24
NC
B-NR
23
VCC
+ LPF
22
VCC +B
21
DOLBY
LM ON/OFF
5.6V
B-NR
R44 22K
20
)
REC/PB 20 (
19 R45 22K
NR ON/OFF ) 19 (
C59 22u16
+
C60 22u16
18
NC
+
17 0V R46 22K
RM ON/OFF ) 17 (
16 0V R47 22K
BIAS ON/OFF ) 16 (
15
EQ
6.1V NC
6.0V
6.1V 0V 0V 3.9V
+5V
R90
1K
IC6
5.6V
R95
10K
R96
10K
R97
10K
R100
10K
R73 10K
R76 10K R99 10K
R98 10K
+12V +12V +12V
+5V +5V
0V
B TAPE 3.0V
Q4
SPEED
R68
R84
3
2.2K
+
D2 R80 22K 2
-
B
150K
SOLENOID
DETECTOR
12.4V 2.3V
R83 5
10 9 8 7 6 5 4 3 2 1 +
R79 22K
CN4 6 -
150K
RXD-A5/501/501E/501W/551/551E/551W/571S(K) (2/8)
RXD-701/701E/701W/A8/751/751E/751W/771S(K) (2/8)
RXD-501/551/571/A5/701/751/771/A8
Y39-2850-10
AC AD
+12V
TEST
CN6 PIN
1 L-PLAY
2 L-REC
3 A. GND
4 R-PLAY
5 R-REC
E1
1
+12V BIAS 12V
2
BIAS G
3 X09-A/7
+12V MECH 12V
-CN13
6/8
4
MECH G
5
L-PLAY WH1
C
6
A. GND
7
R-PLAY
8
+12V A. 12V
9
L-REC
10
R-REC
11
D.GND
12
+5V 5V
CN5
1 NC
2 PS IN
R92
3 PS LOAD
1K
4 CD CLK
( 5 ) 5 A SOL
( )
6 6 A CPM
R101
X09-A/7
10K
7 D R/P -CN14
6/8
( )
19 8 DOLBY
( 17 ) 9 R MUTE D
R102
10K
10 BIAS
( 11 ) 11 A/B
( 12 ) 12 BEAT. C
( )
13 13 R/P
14 A-PH
15 B-PH
( 16 ) 16 B SOL
( )
17 17 B CPM
IC1 : HA12209F
IC2,3 : BA328
5.6V
IC4 : BA3126N
IC5 : BA10393
IC6 : TC74HC166AP
R86
100K
8 Q1-4 : 2SC3246
1 B.PH
Q5 : 2SC2003(L,K)
Q7,8 : 2SC2785(F,E) or
IC5
2SC1740S(Q,R)
(1/2)
Q9 : DTA124ESA or
UN4112
R85
Q10,11 : 2SC1845(F,E)
100K
Q12 : DTC124ESA or
7 A.PH UN4212
IC5
4
D1-4 : 1SS133 or
(2/2)
HSS104A
D5 : HZS2.7N(B2) or
MTZJ2.7(B)