Kenwood M-A100 Service Manual page 7

A B C
CAUTION: For continued safety, replace safety critical com-
1
ponents only with manufacturer's recommended parts (refer
to parts list). indicates safety critical 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.
The DC voltage is an actual reading measured with a high
impedance type voltmeter with no signal input. The mea-
surement value may vary depending on the measuring
2
instruments used or on the product.
(X11- ) (C/4)
E1
P1 1
2
J1 R101
100
3
Lch 1
4
GND 2
3
5
R102
100
6
Rch 3
GND 4
7
R103
8 PROTECTION
100
Cch 5
9 CS RELAY
GND 6
10 FRONT RELAY
R104
INPUT 11 POWER
100
TERMINAL
SLch 7
12 RETURN
to C-V100/V150/
E3
AG 8
1
V300/V350
AG
R105
2
100
AG
4
SRch 9
3
Rch
DG 10
4
C78 GND
0.01 5
R106 SW OUT
100 6
SWch 11 SWch
7
FRONT RELAY 12 GND
CS RELAY 13
8
SRch
MUTE 14
9
DG
PROTECTION 15
10
SW POWER
POWER 16
11
SW POW. RET
12
MUTE
RETURN 17 13
5
GND(+15V)
14
GND(B)
D14
X
C
J3
SW
PRE OUT
K2
SW PRE OUT
ON/OFF
6
SIGNAL LINE
GND LINE
+B +B LINE
+B -B LINE
7
D E F
(X11-37XX-XX) (A/4)
+15V AVR
22.4V 15.2V
Q31
15V
0.6V
FLch
15.8V
Q1 Q7
R171 C1
2.2K 4.7u50 R189
R64 + +
47
-39.1V
0V
1K
+ 0V
-39.1V
MUTE
Q121
R177
2.2K
-11.4V
X
A
WH1 E2 PRE
AG 1 DRIVE
AG 2
Lch 3 0.6V
Cch
GND 4
Q3 Q9
R173 C3
X
Cch 5 W82 2.2K 4.7u50 R191
+
47
X
GND 6 W81 -39.1V
0V
0V
SLch 7 X W83
-39.1V
8
) 8 (
MUTE
9
) 9 (
Q123
10
) 10 (
R179
11
) 11 (
2.2K
12
)
12 ( -11.4V
PRE
DRIVE
M-A100
0.6V
Cch
Q5 Q11
R175 C5
2.2K 4.7u50 R193
+
47
-39.1V
0V
SLch 0V
-39.1V
M-A300
MUTE
Q125
R181
2.2K
-11.4V
WH2
15V
M-A100
DESTINATION W27, W52,82, C109,110,
UNIT No. A , B C R30
113,114
COUNTRY ABB. 81 83
U.S.A. K
X11-3740-10 NO
CANADA P
EUROPE E X11-3742-71
YES
U.K. T X11-3740-51
PX Y X11-3742-91 YES NO NO YES 1.5K
GENERAL MARKET M
X11-3770-21
MALAYSIA I NO
CHINA C X11-3773-00
AUSTRALIA X X11-3770-71
G H
R55
+B
22 1/4W
PRE
DRIVE
Q25 41.1V
1.3V
40.5V
-1.3V
0V
Q13
Q19
R67
47K
+
+
+
R61
47
-B
1/4W
CN6
9 Lch +
8 Lch -
Q27 41.1V
7 Lch NF
40.5V
1.3V
6 Cch +
-1.3V
5 Cch - A
4 Cch NF
0V
3 SLch +
Q15 2 SLch -
Q21
R69
47K
1 SLch NF
+
CN9
15V 1 B(+15V)
-B
2 GND
+B 3 +B
B
4 GND
41.1V -B 5 -B
Q29
40.5V 1.3V
6 MUTE DRIVE
( 11 ) 7 POWER
-1.3V
( 12 ) 8 POWER RETURN
( 10 ) 9 FRONT RELAY
0V
( 9 ) 10 CS RELAY
( 8 ) 11 PROTECTION
Q17
Q23
R71
47K
+
-B
15V
WH2
M-A300
C111, DESTINATION W27, W52,82,
C109-
UNIT No. A , B C R30
112 COUNTRY ABB. 81 83 114
U.S.A. K
X11-3740-11 NO
CANADA P
EUROPE E X11-3742-72
YES
U.K. T X11-3740-52
NO PX Y X11-3742-92 NO YES YES NO 2K
GENERAL MARKET M
X11-3770-22
MALAYSIA I NO
CHINA C X11-3773-01
AUSTRALIA X X11-3770-72
I J K
(X11- ) (B/4)
MUTE PRE
DRIVER 15.2V
DRIVE
3.9V R204
680 1W
15V
0.6V 0V
FRch
Q2 Q8
3.9V R172 C2
2.2K 4.7u50 R190
+
47
39.1V
Q203
0V
0V
-39.1V
MUTE
-11.4V
Q122
R178
2.2K
-11.4V
X
B
E4
1
AG
PRE
2 15.2V
DRIVE
AG
3
Rch
4
0.6V 0V
GND(GUARD)
X
5 W27
Q4 Q10
SW OUT
C4
6 R174 4.7u50 R192
SWch
+
7 2.2K 47
GND(GUARD) 39.1V
0V
8
SRch 0V
SWch
9 -39.1V
DG
10
MUTE
SW POWER
11
SW POW. RET Q124
12
R180
MUTE
13
GND(+15V) 2.2K
14
GND(B) -11.4V
+15V AVR
22.4V 15.2V PRE
Q32
DRIVE
15V
0.6V 0V
M-A100
15.8V
SURROUND ch
Q6 Q12
R176 C6 R194
+
R59 +
2.2K 4.7u50 47
39.1V
1K 0V
SR ch
+ 0V
M-A300 -39.1V
MUTE
Q126
R182
2.2K
-11.4V
15V
D1-12,14 : 1SS131 or HSS104A Q1-12 : 2SA992(F,E)
D15-18 : RD8.2ES(B2) or HZS8.2N(B2) or Q13-24 : 2SC2631(R,S)
MTZJ8.2(B) or UZ-8.2BSB Q25-30 : 2SA1123(R,S)
D203 : RD3.9ES(B2) or HZS3.9N(B2) or Q31,32 : 2SC3940A(R,S) or 2SD863(E,F)
MTZJ3.9(B) or UZ-3.9BSB Q121-126 : 2SC2878(B)
D204 : RD15ES(B2) or HZS15N(B2) or Q203 : 2SA1048(Y,GR) or 2SA1309A(Q,R) or
MTZJ15(B) or UZ-15BSB 2SA933AS(Q,R) or 2SA1175(F,E)
L M N
X07-A/4
-CN1
R56
+B
2/2
22 1/4W
40.5V Q26 A
41.1V
1.3V
-1.3V X07-A/4
-CN4
2/2
Q14 Q20
R68 B
47K
+
+
+
R62
47
+B
1/4W
CN7
X07-A/4
1 Rch +
-CN2
2 Rch -
40.5V Q28 41.1V
3 Rch NF
2/2
1.3V
4 SWch +
-1.3V
C
5 SWch -
R70
6 SWch NF
47K
7 SRch +
8 SRch -
Q16 Q22
9 SRch NF
+
CN8
X07-A/4
-CN3
8 GND(+15V)
+B
7 +B(+15V)
2/2
6 +B
5 GND
D
Q30 41.1V -B 4 -B
40.5V
1.3V
3 MUTE DRIVE
2 SW POWER
-1.3V
1 SW POW. RET
Q18 Q24
R72
47K
+
+B
15V
M-A100/A300(K) (1/2)
M-A100/A300
Y08-5610-10
O