Kenwood KRC-31Y, Service Manual

Page: 10 / 24

A B C D E
1
2
3
4
5
6
7
10K
10K
3.8V 3.8V 3.8V 3.8V
0
5
5V
0V
5V
1V
3.8V 3.8V 3.8V 3.8V
3.8V
3.8V
3.8V
3.8V
0V
3.8V
7.7V
5.0V
5.0V
0V 0V
7.6V
7.6V
0V
5V
0V
5V
0V
IC9
IC10
IC8
CASSETTE MECHANISM
(D40-1150-05)
SYNTHESIZER UNIT (X14-689X-XX)
(E30-4792-05)
DC1
J4
CN1
D401
D402
D404
D403
D409
D411
D410
EQUALIZER
AMPLIFIER
SUB MOTOR
DRIVER
Q552
Q551
CN2
MOTOR
D551
A
M
HEAD
Rch
Lch
MAIN
T-END
STBY
SUB
PA
C
K
FWD/REV
M
HD1
M
M1 M2
PLAY
IC1 :
IC2 : TDA7407D
IC4 :
IC6 : TDA7479D
IC9 : HA12221F
IC7 : TDA3682ST
IC8 : HD74HC27FP
Q1,301 : DTC124EUA or
Q10,11,20,101,201
2SD1819A
Q40 : DTA124EUA or
Q50 : 2SA1036K
Q223,224 : DTC143TUA or
Q251 : DTC114YUA or
Q501 : 2SD1760
Q551 : 2SB1443
Q552 : DTC114EUA or
D1 :
S2V20 A
D2,3 : 1GWJ43 (TPB5)
D4,551 : AM01Z or
D10,11,401,402
: MA4068 (N) -M
D20 : MA4051 (N) -M
D40,101,251-253
: B30-1567-05
403,404,407,409-411
: 1SS133
MUTE DRIVER
PREOUT
DRIVE
MUTE
IC12
IC10
IC11 LB1930M
S-80835CNNB
: BR24C01AF
:
:
Q151 DTA114YUA or :
MA4047-M or : D30
D102
MA4062-L or :
D153,154,157,159-161,
B-PART
A-PART
TDA7386
2SC4081 or :
UN5112
UN5114
UN5216
UN5214
UN5211
1N5393G-M6 or
ERA15-01
HZS5B1
HZS6C1
D407
B LINE
GND LINE
SIGNAL LINE
(X14-689X-XX)
C B
UN5212
CH-IN
∗
DA
T
A
C
GND
REQ H
CON
MUTE
S GND
Rch
RST
2
4
3
8 12
7
6
11
10
1 5 9
DA
T
A
H
Lch
CLK
REQ C
13
R404 100
R405 4.7K R406 4.7K
R402 10
R403 4.7
R407 4.7K R409 4.7K R408 4.7K
R411 100 R410 100
R401 10
C403 100u10
+
C402 1u50
+
C401 1u50
+
5
7
6
30 29 28 27 26 25 24 23 22 21
1
2 3 4 5 6 7 8 9
10
31
32
33
34
35
36
37
38
39
40
M-OUT (R)
EQ OUT (R)
D IN (R)
RAI (R)
PB OUT (R)
MS GV (S)
MS GV (R)
MA OUT
MSI
MS DET
VCC
MUSIC
S/R (MSGV)
F/R
MTL
M-OUT (L) RQ OUT (L) D IN (L) RAI (L) PB OUT (L) MUTE
NFI (R)
R IN (R)
RIP
F IN (R)
F IN (L)
V REF
R IN (L)
NFI (L)
1
2
3
4
5
6
7
8
9
10
MODE
MODE+B
SUB(-)
SUB(+)
PACK IN
F/R
GND
HEAD L
HEAD COM
HEAD R
9
7
1u50
+
C509
B.
U
.
42 44
16
63
18 17
5
4
3
2
1
SGND
IN2
IN1
NC
VCC
6
7
8
9
10
PGND
OUT2
NC
OUT1
NC
470
0.01
330K 5.1K
0.1u50
+
22u6.3
+
C514
150
R514
0.01
330K 5.1K
+
R513
150
C513
22u6.3
+
C517 0.1u50
15K
1500P
R533 470
C532 0.01
R534 100K
470
57
64
R415 100K
C404 0.01
VDD
GND
1
2
14
13
3
12
11
4
5
6
7
10
9
8
77
59
58
C533
C534
9
7
R551 10K
STBY
T-END
GND
GND
4
6
7
5
2
3
1
M+B
R552
1K
20 19
R556 470
R554 470
1/2W
10
9
6
8
7
5
4
1
3
2
HEAD R
HEAD COM
HEAD L
GND
F/R
PACK IN
SUB(+)
SUB(-)
MODE+B
MODE
MODE
FWD/REV
PA
C
K
M+R
GND
T-END
STBY
GND
R413 100K
R414 100K
R412 100K
R535
R536
22K
R531
4.3K
C515
R517 R519
12K
R515
C512 R512
15K
1500P
C511
R511
R520 R518
C516
12K
R516
4.3K
R522
R521
39
C518
3
1
2
7
4
5
6
7
B
5 3 1
6 2 4 8
REAR.
L
FR
ONT
. L
FR
ONT
. R
REAR.
R
P
.CONT OUT
AC
C
ANT
.CONT
8
7 5
6 4
3 1
2
BA
TT
A
RED BLU/WHT BLK YEL
GRN
WHT
GR
Y
VIOL
GRN/BLK WHT/BLK
GR
Y/BLK
VIOL/BLK
0.22
0.22
+B
KRC-4904Y (E)
KRC-31Y (E)
KRC-394 (E)
KRC-366L (M)
2-71
0-22
2-72
2-70
NO
NO
NO
YES
YES
NO
YES
NO YES
NO
NO
YES
MODEL NAME
KRC-394Y (E)
UNIT
R111 C308
KRC-466R (M) 0-21 YES YES YES
A1
X86-3512-70
X86-3512-70
X86-3512-72
X86-3512-70
X86-3512-70
IC1
UPD780058GC418
UPD780058GC426
UPD780058GC418
UPD780058GC426
UPD780058GC418
NO
NO
YES
YES
NO
R112
NO
NO
YES
YES
YES
R113
+B +B
+2V
+5V
+B
+B
+B
+B
+B
NO
YES
YES
YES
Q301
NO NO NO
YES YES
NO
YES
NO
NO
YES YES
R146 R118
NO
YES
YES
NO
NO
R114
No.
KRC-37Y (E)
KRC-37 (E)
+B
28
+2V
+2V
KRC-391 (E)
KRC-36 (E)
CAUTION : For continued safety, replace safety critical components only with
manufacturer's recommended parts (refer to parts list).
Indicates safety critical components. To reduce the risk of electric 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.
•
DC voltages are as measured with a high impedance voltmeter. Values may
vary slightly due to variations between individual instruments or/and units.