Kenwood NX-720 Service Manual page 114

AT
NX-720
COUPPLER
Forward Power
.
L117
Reverse Power
D104,105
TX Power Detection
Over Voltage
Protection
D106
DZ2J056(M)
C165
470p
Reverse
Current Prevention
R158 R152
33k
1k
D108,109
Over DC
Supply Protection
D108
RB520SM-30
D109
RB520SM-30
SP+
SP-
MIC
ME
B-BUS
POWER
114
X57-823 10/10
AU
SCHEMATIC DIAGRAM / 原理图
LCDCS
SCK0
SDO0
C158
470p
D103
RKS151KJ
SDI0
AV AW
.
R1
0
SB
BLC
MBL
BLED
5V_TXD2
.
C661
5V_TXD2
47p
CN530
EMG
50C
GLED
RLED
TXD2
.
R616
BUCNT1
TXD1
470k
Dual BUS
.
Buffer
D511
IC716
Reverse TC7WT126FU-F
Current
Prevention
MKEYO
BUCNT2 .
D511
/PTT
.
DB2S310
C651
.
0.1u
R684
47k
HOOK_RXD1
33M
Dual BUS Buffer
.
MKEYI
IC509
TC7WH126FU-F
.
.
D502
R615
.
4.7k
DB2S310
R613
10k
Reverse
Current Prevention
AX
TX-RX UNIT (X57-8230-11)
R171
ANT
0
.
CN514
1
.
SB
C621
2
SB
1000p
3
SP-
4
SP-
5
SP+
.
6
SP+
C620 100p
.
7
BLC
C618 100p
.
8
.
MBL
C617 100p
CP515
.
9
RLED
100p
C616
.
100X2 10
GLED
C615 100p
.
11
BLED
C614
100p
12
GND
13
GND
14
GND
.
.
15
BUS Buffer
EMG
C613 0.01u
IC511
TC74VHCT244AFK
16
GND
17 NC
.
18
50C
C612 100p
.
19
LCDDI
. 47p
C611
.
CP516
20
LCDCE
C610 47p
21
LCDCL
.
R617
100X4 22
LCDDO
0
23
GND
24
GND
.
25
MIC
C607 100p
.
26
ME
R614 0
.
27
HOOK
C605
100p
.
28
PTT
1000p
C604
.
29
MKEY
C603
100p
.
30
POWER
C602 0.01u
POWER