Kenwood NX-720 Service Manual page 68

Vhf digital transceiver
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F
NX-720(G)/720
B-BUS
A-BUS
D-BUS
C-BUS
DGND
D[15]
L13
D[15]
D[14]
L12
D[14]
D[13]
L11
D[13]
D[12]
M14
D[12]
C501
D[11]
N12
D[11]
D[10]
0.1u
P12
D[10]
D[9]
L10
D[9]
D[8]
N11
D[8]
D[7]
P11
D[7]
D[6]
M10
D[6]
D[5]
P10
D[5]
D[4]
L9
D[4]
D[3]
M9
D[3]
D[2]
P9
D[2]
D[1]
K8
D[1]
L8
D[0]
D[0]
G3
A[20]
C502
H3
A[19]
0.1u
K1
A[18]
P5
A[17]
P7
A[16]
M8
A[15]
C503
K9
A[14]
A[13]
0.1u
N3
A[13]
A[12]
P3
A[12]
A[11]
L4
A[11]
A[10]
N4
A[10]
A[9]
P4
A[9]
A[8]
L5
A[8]
A[7]
N5
A[7]
A[6]
L6
A[6]
A[5]
M6
C504
A[5]
A[4]
P6
A[4]
0.1u
A[3]
K6
A[3]
A[2]
K7
A[2]
A[1]
M7
A[1]
A[0]
L7
A[0]
H11
NC
A'[0]
R501
F2
X2/CLKIN
22
A2
VSS_1
B1
VSS_2
B9
VSS_3
C505
B11
VSS_4
10u
C2
VSS_5
C506
C5
10u
C507
10u
D
D[9]
D[11]
L501
33M
D[13]
D[15]
D[1]
D[3]
D[4]
D[6]
D
X2/CLKIN
B-BUS
68
X57-823 2/10
G
SCHEMATIC DIAGRAM
CP507
100kX4
G1
oE
G2
DQ9
G3
DQ11
G4
VCC
G5
DQ13
IC501
G6
Flash Memory
DQ15
H1
VSS1
H2
DQ1
H3
DQ3
H4
DQ4
H5
DQ6
H6
VSS2
R503
100k
H
CN541 CN542
CP514
100kX2
IC502
DSP
DGND
A[16]
A[0]
A[16]
G4
A16
A[15]
G5
A[15]
A15
A15
D6
G6
A[11]
DQ3
A11
A[9]
D5
H1
A[19]
A9
A19
A[10]
D4
H2
IC503
A[20]
A10
A20
A[11]
SRAM
D3
H3
A[5]
A11
A5
A[12]
D2
H4
A[1]
A12
A1
A[13]
D1
H5
A[14]
A13
A14
A[14]
C6
H6
A[10]
A14
A10
C5
A21
C4
A[18]
A18
C3
A[6]
A6
C2
A[2]
A2
C1
D
I
J
TX-RX UNIT (X57-8230-1X)
R526 100k
CP513
100kX4
C533
15MDSP
10u
CN502
CLKoUT
CN503
CN540
33MDSP
XF
E14
GPIo0
F3
GPIo1
E1
R541 100
GPIo2
E2
GPIo3
B3
CP504 100X2
GPIo4
A3
GPIo5
D5
GPIo6
C4
GPIo7
D1
GPIo8
G5
GPIo9
H4
GPIo10
H5
CP503
GPIo11
J3
100kX4
GPIo12
C536
M1
GPIo13
R536
R549
M2
0.1u
RTCINX2
0
B12
RTCINX1
A12
SCL
H14
CP502 100kX2
SDA
H13
DN
D3
DP
D4
CP510
PU
C1
100kX2
AIN[3]
E11
AIN[2]
D12
AIN[1]
D13
AIN[0]
C527
D14
RCVDD_4
C12
0.1u
RDVDD_3
A14
RDVDD_2
B13
RDVDD_1
A13
AVDD
C14
ADVDD
F10
USBVDD
D2
USBPLLVDD
C528
G11
CVDD_15
N8
0.1u
CVDD_14
N7
CVDD_13
C529
M11
CVDD_12
M4
0.1u
CVDD_11
L14
CVDD_10
C530
L1
CVDD_9
J11
0.1u
CVDD_8
J10
CVDD_7
C531
J5
G1
0.1u
15MDSP
33MDSP
DGND
C524 1u
VCC1
D6
VSS1
D1
D[1]
D
DQ1
C6
A[5]
A5
C4
NC1
C3
D[5]
DQ5
C1
D[0]
DQ0
B6
A[7]
A7
Reset
B5
A[4]
IC504
A4
BD5329FVE
B4
4
GND
CT
D[4]
SUB
5
VDD
VoUT
L505
R546
0
C537
1000p
D
B-BUS
FSX0
CLKX0
A-BUS
D-BUS
C-BUS
/MCCSXCN
MCSCKCN
MCDICN
FSDET
10k
3
2
1
RST
3.3V
X2/CLKIN
B-BUS

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