Kenwood NX-220 Service Manual page 102

AE
NX-220
SCHEMATIC DIAGRAM /
TX-RX UNIT (X57-8040-10)
/T_R
5
+B
33C
THP
L425
TEMP
X401
5
L77-3073-05
1 G ND1
VCC
4
2 G ND2
oUTPUT 3
16.8MHz
SDO1
/PCS_RF
PCK_RF
PLLMOD
PLD
100C
(B540-11-042E)
100C
R404 R467
0
47
/PSW
/BINT
50C
SBC
R:0V
T:3.30V
6
33A
102
X57-804 5/8
AF
33C
L120
R407
10
L401
C483
R408
4.7u
1k
1000p
BYPASS
DC AMP(ASSIST)
IC402
XC221A1200MRG
1 V oUT 5
V SS
2 V DD
+ -
R423
3 I N+ 4
I N-
470k
C429
0.01u
Q505
DC SW(50T)
2SA1955A-F
REVERSE
CURRENT
PROTECT
Q511
RT1N441U-T111
DC SW CONT(50T)
DC SW(50R)
Q503
EMD5
R:3.30V
T:0V
AG AH
原理图
C413 0.01u
C414 0.01u
3.30V
13
NC_1
14
NC_2
15
IC403
NC_3
SKY72310-362
16
NC_4
PLL SYSTEM
17
NC_5
18
NC_6
L402
CP401
10x4
DC AMP (CV/APC)
D401
CV
DA221
T C 7 5W5 1F K (F )
CN401
1
R422
2
-
10M
3
4 V S S
C439
C444
R469
100k
Q512
DC SW(50CS)
S S M 6L05F U - F
5.0V
R:0V
T:4.95V
DC/DC (100C)
R552
IC509
100
1 CoMMoN
VCC
2 IN H
7
CH0
3 V E E
CH1
4 G N D 5
A
T C 7 W53 F K (F )
C543
R548
R:4.87V
T:0V
100
1u 16
AI
C442
R411
10
100p
CPout
6
R415
VCCcp
5
10
LD/PS
4
C420
C 42 3
Fin
3
0. 1u
100p
C424
Fin
2
R 412
100p
VCC
1
10
R413
C421
47k
0.1u
C422 C425
100p
100p
C416 100p
C417 100p
100p
C418
C419 100p
BYPASS
IC404
VDD 8
R468
+
7
1k
R464
+ -
6
18k
5
C484
470p
0.1u
1000p
4.97V
R551
1k
9.36V
D511,512
DC/DC CONV
D511 D 5 12
1 S S4 16 1S S 416
8
DC/DC CONT(38M)
6
Q510
RT1N141U-T111
/T_R
33C
Fin
+B
CPout
CV
APC
OSC
50T
50R
33A
5
50CS
6