Kenwood NX-800 Service Manual page 136

Uhf digital transceiver
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AE
NX-800
HD2
X2_CLKIN
3
4
5
4
G1
G2
D9
3.31V
G3
D11
L501
G4
G5
D13
G6
D15
H1
H2
D1
H3
D3
H4
D4
H5
D6
H6
D
R504
100k
DELAY
3.31V
IC505
TC7SH08FU-F
1 INB
5
VCC
2 INA
3
4
GND
oUTY
C522
0.01u
D
6
BCLKR0
BCLKX0
1
7
2
136
X57-775 (A/2) 7/16
AF
SCHEMATIC DIAGRAM /
5
4
oE
A15
DQ9
A11
DQ11
A19
VCC
A20
DQ13
A5
IC501
DQ15
A1
FLASH ROM
VSS1
A14
DQ1
A10
DQ3
A21
DQ4
A18
DQ6
A6
VSS2
A2
3
5
33M
R545
0
1
RESET (MCU)
32KOUT
2
IC506
SCL
3
XC6109C29ANN
3.31V
SDA
4
1
4
INTRB
VIN
VoUT
5
VSS
2
3
VSS
CD
D
D
33M
SCTAM1
BUFFER AMP
(OP : 20PIN BER CLK/BER DATA)
IC507
TC7SH126FU-F
3.31V
1 G
5
2
VCC
2 INA
3
4
GND
oUTY
C527
0.01u
D
AG
原理图
3
4
A16
3
A0
3
5
G4
A16
A16
D6
G5
A15
A15
A15
D5
G6
A11
DQ3
D4
H1
A19
A9
A9
D3
H2
A20
A10
A10
D2
H3
A5
A11
A11
D1
H4
A1
A12
A12
C6
H5
A14
A13
A13
C5
H6
A10
A14
A14
C4
C3
A18
C2
A6
C1
A2
3
3
/WR
IC504
RTC
RV5C386A
3.31V
L523
10
VDD
9
OSCIN
8
OSCOUT
7
CLKC
6
INTRA
C521
0.01u
8
6
1
2
7
D
CN549
AH
AI
TX-RX UNIT (X57-7752-71) (A/2)
4
D
3.31V
C515
1u
L522
D6
VCC1
D1
VSS1
C6
D1
DQ1
C4
A5
IC503
C3
NC1
SRAM
C1
DQ5
D5
B6
DQ0
D0
B5
A7
B4
A4
4
D4
D
33BU
IC509
TC7WT125FUF
4.99V
1 G1
8
50C
VCC
2 A1
7
3 Y2
G2
6
AIO7
4
Y1
5
GND
A2
D
BUFFER AMP
(BER CLK/BER DATA)
AIO6
9
SCRXD
SCTXD
HD2
X2_CLKIN
3
4
5
8
6
1
2
SCBSY
9

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