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Q Q
3 7 6 3 1 5 1 5 0
1
2
3
MC-139 BOARD
MIC AMP
A
J501
– REF.NO.:4000 SERIES –
MIC
XX MARK: NO MOUNT
B
C
D
E
T E
L
1 3 9 4 2 2 9 6 5 1 3
F
G
H
CN501
5P
GND
1
TO
I
AV-63 BOARD(1/2)
-11V
2
CN204
+11V
3
(AM-130 HARNESS)
MIC
4
(SEE PAGE
4-28)
MIC+ECH0
5
J
K
w w w
16
.
4
5
6
7
R501
0
L501
R505
100
100uH
R506
R502
100k
C502
C503
0
4700p
0.01u
R503
B
B
0
C501
0.001u
R504
0
D501
UDZSTE-178.2B
C513
R513
0.01u
XX
B
D502
MA153-TX
R518
3900
B-
C514
C517
0.01u
XX
B
IC504
R530
+5V REG
10k
C539
R528
R531
1u
50V
47k
10k
IC504
NJM78L05UA-TE1
3.2
5.1
R529
10k
4.4
0
Q501
DTC124TKA-T146
5.0
MUTE DRIVE
Q502
2SB709A-QRS-TX
MUTE DRIVE
3
2
1
B+
C520
C523
47u
47u
16V
16V
JL501
JL502
B-
C521
C522
0.01u
0.01u
B+
B
B
JL503
JL504
JL505
x
a o
y
i
4-37
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8
8
9
10
C505
0.001u
C506
C508
R507
C509
R510
4.7u
0.01u
100k
XX
10k
50V
B
R508
1k
B+
C504
C507
2.2u
R511
330p
50V
100
R509
C510
33k
2.2u
50V
5
6
7
8
IC502
MIC AMP
IC502
NJM4556AM-TE2
R515
4
3
2
1
R517
C516
0.001u
RV502
C515
R519
R533
0.01u
10k
330k
B
C533
47u
MIC LEVEL
16V
Q
Q
3
7
6
3
R532
22k
C534
0.1u
C535
0.22u
C538
B
22u
50V
C536
0.22u
B
R526
22k
JS501
C537
6800p
B
R527
0
SIGNAL PATH
AUDIO
SIGNAL
REC
PB
u 1 6 3
.
http://www.xiaoyu163.com
2
4
9
9
8
11
12
13
14
ECHO LEVEL
RV501
R512
C512
0.01u
10k
B
C511
0.001u
5
6
7
8
R514
3900
IC501
MIC AMP
IC501
BA4558F-E2
10k
4
3
2
1
10k
C519
100p
R516
10k
C518
0.01u
B
1
5
1
5
0
8
9
2
4
C524
IC503
22u
50V
B
IC503
ECHO
M65850FP-E1
C528
0.001u
2.5
B
GND
LPF2 OUT
JL516
R522
22k
0.3
2.5
CC2
LPF2 IN
JL515
R521
0.6
2.5
CC1
OP2 OUT
2.5
2.5
OP1 IN
OP2 IN
C530
C529
0.068u
0.068u
2.5
2.5
B
B
OP1 OUT
REF
C531
2200p
2.5
0.9
B
LPF1 OUT
CLOCK
JL518
R523
100k
2.5
5.1
LPF1 IN
VCC
R525
JL517
JL514
22k
N.C.
N.C.
JL519
JL520
C532
0.1u
R524
B
27k
m
c o
4-38
DVP-K380
2
9
9
15
16
9
8
2
9
9
R520
22k
22k
C525
6800p
B
C527
0.056u
B
C526
47u
16V
MIC AMP
MC-139
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Troubleshooting
