Schematic Diagram - Kenwood NX-820G Quick Start Manual

A
TX-RX UNIT(X57-8240-1X)
1
+B
13.2V
BATTERY
-B
2
Discharge
3
4
5
Over DC Supply
Protection
LTC014EEBFS8
DC Switch
(Over DC Supply
Protection)
6
C649
0.01u
R683
0
D
7
X57-824 1/10
B

SCHEMATIC DIAGRAM

C N 4 2 3
Surge Reverse
Current
Protection
Prevention
3.27V
AVR(33M) 4.98V
1
VIN
VoUT
5
2
VSS
3
NC CE
4
IC401
XC6209B332M-G
Voltage Detector(BINT)
4 VSEN
V I N
V S S
5
CD
V o U T
.
IC402
XC6118C23CMR
3.26V
C417 100p
Q403
MTM981400BF
8
1
7
2 6
3 5
4
DC Switch(SB)
RX:6.56V
TX(25W):6.38V
TX(5W):6.49V
D 4 0 3
Q401
RB520SM-30
Q418
LTC014EEBFS8
DC Switch(SB)
R 4 0 7
4 . 7 k
D403,404
Reverse Current
Prevention
3.30V
Digital GND
. . .
R682 R681 0 R680
.
.
0 0
C648
.
R678
.
R677 0.1u
.
0
R679
0 C647
0
0.01u
D D D
C
NX-820(G)/820
R:13.2V
DC/DC Converter(50M)
T(25W):12.8V
IC405
LT1616ES6-PBF
4
SHDN
FB
3
5
VIN
GND
2
L404
6
SW
BooST
1
DC/DC
Converter
AVR(33A)
1
VIN
VoUT
R410 5
2
VSS
4.7
3
CE
D405
NC
4
DB2S310
IC406
R411 XC6209B332M-G
3.31V
47k
.
F 5 0 2
50MC
2.5A
2.3V SBC2
Q 4 0 7
F K 3 3 0 3 0 1
R413
R412
10 10
R:4.59V
T:3.45V
3
2
R 4 3 8
1
1 0
4.43V
SB
13.2V
AVR(80C)
I C 1
RX:7.90V
TA7808F-NQ
TX:7.89V
1
IN
OUT
2
.
F503
.
375mA
R 4 1 9
2 . 7 k
DC Switch
.
(80ANT)
Q 4 0 2
2 S A 1 9 5 5 A - F
.
AVR(50C)
I C 4 0 4
5.0V
XC6209B502P-G
R:1.72V
T(25W):1.66V
T(5W):1.68V
50CS(SAVE)
D
C N 4 2 2
DC/DC Converter(50M)
5.02V
D 4 0 7
R B 5 2 0 S M - 3 0
L405
22uH
CN421
R 4 1 8
0
Q 4 0 9
3
4
5 2
6 1
E M 6 M 1
DC Switch
(33A_2)
Q 4 1 0
R423 2 S A 1 9 5 5 A - F CN419
DC Switch(50MC)
4.7k
CN418
DC Switch(50MC)
AVR(15M)
IC408
CN417
XC6205B152P-G
D
AVR(33GPS) 33GPS
IC407
NJM2878F4-33
CN414
.
DC Switch(80T)
Q 4 0 4
2 S A 1 9 5 5 A - F
80T
.
.
DC Switch(80T)
R421
Q411
R:0.0V
LTC014EEBFS8
T:3.29V
4.7k
R:0.0V
T:7.84V
.
.
DC Switch(80ANT)
R441
Q 4 0 5
LTC014EEBFS8
.
DC Switch(80ANT) 2.7k
Q 4 1 2
LTC014EEBFS8
50C
50R
DC Switch(50R)
.
Q 4 1 7
E M D 5
50CS
DC Switch(50CS)
3.3V
.
Q 4 0 8
E M D 5
R:3.3V
T:0.0V
E
+B
50M
50M
33A
33A_2
3.3V
33A_2
SBC2
50MC
4.99V
15M
1.5V
33M
33GPS
3.32V
3.32V
SB
80C
80T
R:0.0V
T:7.79V
80ANT
80T
DSW
R:3.29V
T:0.0V
50C
50R
R:4.75V
T:0.0V
50CS
4.89V
67