B
C
D
E
F
G
H
I
J
A
2
4
3
5
6
7
1
KGC-4042A
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.
CN4
IC4(1/4)
IC4(2/4)
IC4(3/4)
IC4(4/4)
Q201
Q202
Q203
Q204
Q205
IC5(1/2)
Q251
Q252
Q253
Q254
Q255
IC5(2/2)
SW2
SW3
LAMP
EQ
IC2(1/2)
IC2(2/2)
Q8
Q9
CN1
CN2
CN3
Q11
Q10
Q12
IC3(1/2)
IC3(2/2)
SW1
CN14
CD14A
Q1
Q2
D1
D2
Q3
Q4
Q5
D4
D6
D5
D7
D3
IC1(1/2)
CN9
CN10
CN11
CN12
CN13
LED1
LED2
LED5
LED4
LED3
LED7
LED6
ISO
BUFF
BUFF
BUFF
BUFF
MUTE
MUTE
HPF SW
EQ AMP
EQ AMP
1/2 VCC
Q7
Q6
LAMP/
DRV
LED
SUBWOOFER
FREQ.
SUBWOOFER
LEVEL
L
R
FRONT
REAR
R
L
SUB
R
L
L
R
INPUT
IC1
: NJM4580MD
IC2,3
: NJM2068MD
IC4
: NJM2060M
IC5
: UPC4570G2
Q1 : 2SC4640(T.U)
Q2 : 2SC1741A(R)
Q3 : 2SC2060
Q4 : DTA114ES
Q5
: DTC114ES
Q6,7
: 2SA1782(T.U)
Q8-12
: 2SC3327-A
Q201-205,251-255
: 2SC2712(GR)
D1,2
: DSK10C-ET1
D3
: MTZJ4.3A
D4-6
: 1SS133
D7
: MTZJ5.1B
LED1-5
: AY3802K
LED6,7
: PY3822K
CN15
SUB
50
200
800
3.2K
12.8K
50
12.8K
800
200
3.2K
B LINE
GND LINE
SIGNAL LINE
4
3
2
1
470P
C1
1K
R1
100u25
+
C3
4.7u50
+
C2
10K
R21
1K
R51
+
4.7u50
C52
+
100u25
C53
C51
470P
R71
10K
0.1
C101
0.1
C100
10
9
4
8
13
12
14
1.5K
R202
1.5K
R201
1.5K
R204
R203 1.5K
6
5
7
2
3
1.5K
R252
1
11
1.5K
R251
1.5K
R254
R253 1.5K
C96 220u10
+
C97 10u50
+
R207 180
R208 2.2K
R209 33K
0.33
C203
4.7u50
C202
+
13
R212 33K
R21
1 2.2K
R210 150
0.1
C205
C204
+
1u50
14
R218 39K
R217 4.7K
R214 4.7K
R215 39K
R213 560
3900P
C207
R216 560
C209
1000P
C206
+
0.47u50
15
C208
0.1
16
R221 33K
R220 4.7K
R219 680
270P
C21
1
0.033
C210
21
3
2
8
1
22u25
+
4.7K
R205
10u50
+
150K
R222
11
12
4.7K
R206
4.7u50
C252
C254
1u50
C256
0.47u50
C258
C260
0.33
R258 2.2K
R257 180
C253
R259 33K
R261 2.2K
R260 150
C255
0.1
R265 39K
R262 33K
R264 4.7K
R263 560
3900P
C257
R269 680
R270 4.7K
R268 39K
R267 4.7K
1000P
R266 560
C259
R271 33K
C261
270P
150K
R272
10u50
+
R255
4.7K
22u25
+
4.7K
+
31
1
+
22
23
6
5
R256
7
4
+
24
0.1
25
0.033
26
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
22u25
+
C61
C11
+
22u25
R3 10K
R5 100K
R4 10K
R54 10K
R55 100K
R53 10K
(GR)
(OR)
(OR)
(GR)
15
A
R91
11
0
11
0
R92
E
C
B
D
ON
C5
C4
C55
1u50
+
C12
270K
R7
R6 3K
30K
R8
0.1u50
+
C13
1u50
+
C14
10K
R10
R20
270K
2
3
8
1
C15 2200P
R11 1.5K
1u50
C62
R61 1.5K
30K
R57
270K
R56 3K
R58
C63
+
+
270K
R60
10K
R70
1u50
+
C64
5
6
4
7
C65 2200P
0.1u50
R67 33K
R17 33K
560
R13
22u25
+
C16
22K
R12
10K
R14
22u25
C66
+
R63
560
22K
R62
R64
10K
1K
R15
1K
R16
(1/2)
VR1
R18
11
K
R19
11
K
1K
(2/2)
VR1
R66
1K
R65
11
K
R68
R69
11
K
4
3
2
1
3
1
2
4
2
1
3
4
470
R150
0.01
C150
R103
10K
R101 22K
560
R102
10u50
C95
+
2
3
4
1
R99
R98
3.3K
R100
0.47u50
+
C93
0.22u50
C94
+
3.3K
R97
R95 100K
R124 1K
R96
6
5
8
7
470P
C92
100K
100K
6.8K
C91 3300P
C90 1u50
+
220
R84
22u25
+
10K
4.7K
R81
1
2
3
470u16
C82
+
0.047
C81
0.022
C83
R82
2.2K
R83
47u16
C84
+
330u25
+
C88
1K
10K
R85
R86
4.7K
R107
R89 10
3.8K
R90
R88
47K
R87
33u50
+
C89
470u16
C86
+
1000u16
+
18K
R84
C85
5
6
8
7
100u25
C87
+
2
1
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
14
1
13
12
11
21
16
15
25
26
22
23
24
31
470
R104 820
R93
R105
1.5K
34
35
36
34
35
36
44
41
42
44
41
42
2
5
4
3
6
4
2
3
5
6
15K(B)
VR2(6/7)
15K(B)
VR2(6/7)
20K(B)
VR2(7/7)
150Hz
30Hz
ON
Q12
Q8,9
IC4
VR2(6/7)
VR2(7/7)
GND
BATT
P. CON
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
LAMP1
LAMP2
LAMP4
LAMP3
GR
OR
1.5K
R106
F
R
FADER
L
H: ON
+B
R108
C98
C54
VR2(1/7)
VR2(2/7)
VR2(3/7)
VR2(4/7)
VR2(5/7)
R9
R59
1.5K
1.5K
120K
+B
+B
+B
+B
+B
+B
+B
+B
+B
G1
KGC-4042A
3.4V
3.4V
12.6V
3.4V
3.4V
3.4V
3.4V
3.4V
3.4V
3.4V
0V
3.4V
3.3V
12.6V
2.7V
12.6V
5.0V
4.0V
3.4V
5.0V
4.0V
3.4V
0V
12.6V
3.4V
3.4V
3.4V
3.4V
3.4V
3.4V
0V
3.6V
12.6V
3.4V
3.4V
0V
3.6V
3.6V
3.6V
0.7V
0.7V
1.4V
14.4V
13.5V
14.4V
14.4V
0V
14.2V
14.4V
0V
10.0V
13.6V
0V
8.9V
13.6V
12.6V
3.4V
3.4V
3.4V
10K
10K
10K
10K
E
C
B
2SC1741A(R)
2SC2060
DTA114ES
DTC114ES
E
C
B
B
E
C
2SC2712(GR)
1
4
NJM2068MD
UPC4570G2
5
8
1
7
8
NJM2060M
14
