Kenwood NX-200 Service Manual page 87

AJ
CONTROL UNIT (X53-4590-XX)
SP-
SP+
33A
Q707
2SJ243-A
MIC
MUTE
R843
1k
D12-16
REVERSE
CURRENT PREVENTION
EXTSP+
EXTSP-
ME
9
+B
MM
9 16
19
16
15
21
23
IFADCN
18
9 Side_1,Side_2,Side_G
13
AK
SCHEMATIC DIAGRAM
6_/KEYI0
BL_SB
6_KEYO1
6_KEYO0
6_KEYO2
6_/KEYI1
9
D18,19
SURGE
ABSORPTION
R40
0
R846
470
MIC
MUTE
A
SW
A
3.32V Q5
2SJ347F
C797
1u
MIC
MUTE
CONTROL
A
Q4
SSM3K15TE(F)
A A
D12
KDR720F-P
5V
VOLTAGE REGULATOR (50U)
A
A
A
R500
47k
IC415
2 INPUT
AND
Q411 GATE
LEVEL
CONVERTER
13
AL
SWITCH UNIT (X41-3720-10)
CN23
AGND 14
A
R20 1k 6_/KEYI0 13
R21 1.2k
BL_SB 12
R22 1k 6_KEYO1 11
R23 1k
6_KEYO0 10
R25 1.2k
BL_SB 9
R24 1k
6_KEYO2 8
R26 1k
6_/KEYI1 7
L1
SP- 6
SP- 5
SP+ 4
A A
L2
SP+ 3
EMC 2
ME 1
A
CN22 CN24
A
R29
1k
L5
R28
1k L6
R30
100 L7
R31
1k
R32
100
D414
REVERSE CURRENT
PREVENTION
L3
D414
R503
10k
KDR720F-P
R34
100
R502
10k
IC417
DUAL BUS
BUFFER
C453
0.01u
A
A
REVERSE
CURRENT
PREVENTION
13
16
19
15
21
23
18
9
AM AN
NX-200(G)
6KEY
SP
MIC
D20-23
SURGE
ABSORPTION
A
L4
L8
10
A
11
R35
12
100
R33
13
100
14
A
D17
SURGE
ABSORPTION
IC418
TC7WT125FUF
1 8
G1 VCC
2
7
A1
G2
3
6
Y2
Y1
4
5
GND
A2
C464
0.01u
A
DUAL BUS
BUFFER
X53-459 8/10
CN405
1
SSW
2
SP+
3
SP-
4
MSW
5
EMC
6
ME
7
PTT
8
PF
9
OPT
E
5V
TXD
RXD
NC
19
15
21
23
IFADCN
18
9
87