Kenwood G-EQ300 Service Manual page 9

U V
MAIN PCB
JACK101
R101
L
1
470
C113 0.01
PLAY IN
C114 0.01
R102
R
470
TAPE
R105
L
1.5K
REC OUT
R106
R
1.5K
IC101
INPUT
JACK102 15.3V
SELECTOR
R109
L
470
Lch
LINE IN
2
R110
R
470
Rch
-15.1V
R113
L
1.5K Q106
R117
4.7K
LINE OUT MUTE
:
MUTE ON 9.8V
R118 NOR : -14.9V
3 4.7K
Q105
R114
R
1.5K
14.8V
D103 D104
+15.3V
MUTE CONTROL
MUTE ON : 0V
Q101
MUTE OFF : 13.5V
D105
Q104 MUTE ON
: 4.5V
MUTE OFF
: 0V
4
+15.3V
15.3V
0V
IC108(1/2)
C209 Lch
R137 1u100 3
8
+ 1
100 +
2
-
0V
0V BUFFER
6
C208 - 7
R138 1u100
5
+
+ 0V
100 4
IC108(2/2) Rch
-15.1V
-15.1V
JACK103
SYSTEM
CONTROL
5
DISPLAY PCB
-W301
1/2
A
DISPLAY PCB
-W302
11 10 9 8 7 6 5 4 3
CN102
1/2
B
DISPLAY PCB B
-W305
6
1/2
C
CAUTION: For continued safety, replace safety critical components only with
manufacturer's recommended parts (refer to parts list).
components. For continued protection against risk of fire, replace only with same type
and rating fuse(s). 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.
7
W X
+15.3V +15.3V
-15.1V -15.1V
C115 4.7u100 R123
+ 100K
R131
11K
C137
220P
IC103
E.Q
10K 10K
IC
(BOTTOM VIEW)
E.Q ELECTRIC
VOL.IC
IC105
(BOTTOM VIEW)
28
C135 C131 C127 C123 C119
NC
27
0.33 0.22 0.15 0.068 0.043
IN1R
26
IN2R
25
FR7
24
FR6
23
C111
FR5
330P 22
FR4
C109 C110
21
FR3
330P 330P
20
FR2
19
FR1
AR101
820K x 7
18
VSS
17
( 17 ) CLK
16
( 16 DI
)
15
VCC
( 13 )
+15.3V
-15.1V
C116 4.7u100 R124
+ 100K
R132
0V
11K
C138
220P
IC102
E.Q
10K 10K
IC
(BOTTOM VIEW)
E.Q ELECTRIC
VOL.IC
IC104
(BOTTOM VIEW)
28
C136 C132 C128 C124 C120
NC
27
0.33 0.22 0.15 0.068 0.043
IN1R
26
IN2R
25
FR7
24
FR6
23
FR5
22
FR4
21
FR3
20
FR2
19
FR1
AR102
820K x 7
18
VSS
17
( 17 ) CLK
16
( 16 DI
)
R142 560 15
( 17 ) VCC
R144 560
( 16 )
R143 560
+5V
( 13 )
( 13 )
2 1
indicates safety critical
Y Z
R127 1.2K C169 4.7u100
+
+15.3V
-15.1V -15.1V
C171 4.7u100 C175
C173 4.7u100 + 220P
+
C177 R135
220P 11K
IC107
E.Q IC
10K 10K
(BOTTOM
VIEW)
1
C167 C163 C159 C155 C151
VDD
2
4300P 7500P 0.01 0.018 0.027
IN1L
3
IN2L
4
FL7
5
FL6
6
FL5
7
FL4
8
FL3
9
FL2
10
FL1
AR103
820K x 7
11
TEST1
12
TEST2 +6.7V +6.7V
13
6.7V
S
14
VEE -6.7V -6.7V
-6.7V
+5V +5V
5.0V
C170 4.7u100
R128 1.2K
15.3V
+
+15.3V
-15.1V -15.1V
-15.1V
C172 4.7u100 C174
C176 4.7u100 + 220P
+
C178 R136
220P 11K
IC106
E.Q IC
10K 10K
(BOTTOM
VIEW)
1
C168 C164 C160 C156 C152
VDD
2
4300P 7500P 0.01 0.018 0.027
IN1L
3
IN2L
4
FL7
5
FL6
6
FL5
7
FL4
8
FL3
9
FL2
10
FL1
AR104
820K x 7
11
TEST1
12
TEST2 +6.7V
13 C189
6.7V
S
14 330P
VEE -6.7V
-6.7V
+5V
5.0V
The DC voltage is an actual reading measured with a high
impedance type voltmeter. The measurement value may vary
depending on the measuring instruments used or on the product.
AA AB
(K.P) TYPE C220
4700P
POWER
+15.3V
T301 TRANSFORMER
W102 SW101 W101
-15.1V 15.3V
2 1 1
2 2
SW101
AC120V
60Hz
MAIN
POWER
A0101
UNSWITCHED
AC OUTLET
1
C220
(E) TYPE
4700P
POWER
T301 TRANSFORMER
W102 W101
SW101
2 1 1
2 2
AC230V
50Hz
SW101
A0101
MAIN
POWER
UNSWITCHED
AC OUTLET
1
(T) TYPE C220
4700P
POWER
T301 TRANSFORMER
W102 SW101 W101
2 1 1
2 2
AV230V
50Hz
UNSWITCHED
AC OUTLET
SW101
MAIN A0101
POWER
+15.3V
15.3V 1
FR154 390 2W
+15.3V
15.3V
FR145 FR155 390 2W
+6.7V
6.7V 680 IC109
5.0V 24.3V
D116
FR146
OUT IN
+5V
680
GND D117
15V
AVR C112
L103 0.01
0.5uH
-15V
D108
AVR
-6.7V
D109
FR147 GND
-6.7V OUT IN
680 -26.0V
-15.1V IC110
-15.1V
D106 C195 4.7u100 D110
+
D111
R153
100K
D107
D115
D114
-6.0V
-6.6V
Q102
R151 -55.6V
-42V
D113
4.7K
AVR
FR102
-55.48V 3.3
D112
-41.3V Q103
1/4W
4 3
2 1
CN101
A
Y09-4610-10
AC AD
(X) TYPE C220
4700P
POWER
T301 TRANSFORMER
W102 SW101 W101
2 1 1
2 2
AC240V
50Hz
SW101
MAIN
A0102
POWER
UNSWITCHED
AC OUTLET
1
C220
(C) TYPE
4700P
POWER
T301 TRANSFORMER
W102 W101
SW101
2 1 1
2 2
AC220V
50Hz
SW101
MAIN
A0101
POWER
UNSWITCHED
AC OUTLET
1
IC101 : NJU7311AL D101-107,118,119 : 1SS131
IC102,103,106,107 D108-117 : 1N4002A
: M5229P ZD101,104 : MTZJ6.8B
IC104,105 : NJU7305L ZD102 : MTZJ5.1B
IC108 : NJM4565DD ZD103 : MTZJ6.2B
IC109 : NJM7815FA
IC110 : NJM7915FA
:
Q101 : DTA124TS
SIGNAL LINE
Q102 : 2SA933S
GND LINE
Q103 : KTB1366Y
+B +B LINE
Q104 : DTC124ES
-B LINE
-B
Q105,106 : KTC2878
AC220- AC110-
240V 120V
(M,Y) TYPE
C220
4700P
SW102
POWER
T301 TRANSFORMER
W306 W103 SW101 W101
1 3 1 1
2 2 2
110-120/
3
230-240V
50/60Hz
4
2
5
SW101
W305
A0101
MAIN
AC
POWER
C C
UNSWITCHED
AC AC OUTLET
1
G-EQ300(M) (2/2)
G-EQ300