Kenwood KRC-31Y Service Manual page 10

A
∗
IC1 :
IC2 : TDA7407D
1
IC4 : TDA7386
IC6 : TDA7479D
IC7 : TDA3682ST
IC8 : HD74HC27FP
IC9 : HA12221F
IC10 : LB1930M
IC11 : S-80835CNNB
IC12 : BR24C01AF
Q1,301 : DTC124EUA or
UN5212
Q10,11,20,101,201
: 2SC4081 or
2SD1819A
Q40 : DTA124EUA or
UN5112
Q50 : 2SA1036K
Q151 : DTA114YUA or
UN5114
2
Q223,224 : DTC143TUA or
UN5216
Q251 : DTC114YUA or
UN5214
Q501 : 2SD1760
Q551 : 2SB1443
Q552 : DTC114EUA or
UN5211
D1 : 1N5393G-M6 or
S2V20 A
D2,3 : 1GWJ43 (TPB5)
D4,551 : AM01Z or
ERA15-01
D10,11,401,402
: MA4068 (N) -M
D20 : MA4051 (N) -M
D30 : MA4047-M or
HZS5B1
3
D40,101,251-253
: 1SS133
D102 : B30-1567-05
D153,154,157,159-161,
403,404,407,409-411
: MA4062-L or
HZS6C1
SIGNAL LINE
GND LINE
B LINE
+B
(X14-689X-XX)
UNIT
MODEL NAME B C A1
No.
KRC-394Y (E)
KRC-37Y (E)
4
KRC-394 (E)
2-70 YES X86-3512-70
KRC-37 (E)
KRC-36 (E)
KRC-391 (E)
KRC-4904Y (E) 2-72 NO X86-3512-72
KRC-31Y (E) 2-71 NO X86-3512-70
KRC-366L (M)
0-22 NO X86-3512-70
KRC-466R (M) 0-21 YES X86-3512-70
CASSETTE MECHANISM
(D40-1150-05)
5
PLAY
HEAD
HEAD R 10
HEAD COM 9
HEAD L 8
GND 7
6
F/R 6
PACK IN 5
SUB(+) 4
SUB(-) 3
MODE+B 2
MODE 1
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
7
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.
B
8 6 4
A-PART
7 5 3
8 6 4
B-PART
7 5 3
DC1
(E30-4792-05)
C308 IC1 R111 R112 R113 R114
YES UPD780058GC418 YES NO YES NO
NO UPD780058GC426 NO YES YES NO
YES UPD780058GC418 NO YES YES NO
NO UPD780058GC426 YES NO NO YES
YES UPD780058GC418 YES NO NO YES
FWD/REV
FWD/REV
M2 M1
SUB MAIN
M M
Rch
HD1
Lch
7 M+R
6 GND
T-END
5 T-END
STBY
4 STBY
3
+2V
2 GND
1
C
J4
1
GND
2
CH-IN
3
+B
4
2
A
1
2
B
1
D404
D407
D401
D402
D403
D409
D410
D411
R118 R146 Q301
YES YES YES
NO NO NO
YES NO YES
77
NO NO NO
YES YES YES
R536
CN1
22K
MODE 1
R535
470
MODE+B 2 +2V
SUB(-) 3 9
SUB(+) 4 7
PACK IN 5 64
F/R 6 57
GND 7
HEAD L 8
HEAD COM 9
HEAD R 10
CN2
1
GND 2
3
R556 470
STBY 4
R554 470
T-END 5
GND 6
MOTOR
Q551
M+B 7 +B +B
R551 10K
10K
10K
Q552
D
SYNTHESIZER UNIT (X14-689X-XX)
5 9
6 10
13
7 11
8 12
7
5
6
R413 100K
R414 100K
R412 100K
+B
SUB MOTOR
DRIVER
IC10
0V 6 5 0V
PGND SGND
7.6V 7
4 5.0V
7 OUT2
IN2
3 5.0V
8 IN1
NC 2
7.6V 9 NC
9 OUT1 1 7.7V
10 VCC
NC
R518 R520
330K 5.1K
C516 R516
0.01 12K
3.8V 31
NFI (R)
32
C509
R IN (R)
1u50
33
RIP
+
34
F IN (R) 3.8V
0V 35
36
3.8V 37
F IN (L)
3.8V 38
V REF
39
R IN (L)
3.8V 40
NFI (L)
R513 C513
150 22u6.3
+
C515 R515
0.01 12K
R517 R519
330K 5.1K
E
5V
IC8
0V
14
1 VDD
13
2
3
12
11
4
10
5
9
5V
0V 6
0V 7
8
GND
MUTE
DRIVE
PREOUT
MUTE DRIVER
M
A
58
59
+B
+B
MS GV (R)
MA OUT
MSI
IC9
MS DET
EQUALIZER
5V
AMPLIFIER
1V VCC
MUSIC
5V
0V S/R (MSGV)
F/R
MTL
5
0