
103
SCHEMATIC DIAGRAM /
原理图
NX-220
X57-804 6/8, X54-376 (C/3) 1/1
AN
AM
AL
AK
AJ
R:4.82V
T:4.86V
R:1.18V
T:0.89V
R:1.16V
T:1.17V
R:4.00V
T:4.00V
R:0.14V
T:0.64V
R:4.14V
T:0V
R:1.13V
T:0V
R:0V
T:4.14V
R:0V
T:0.94V
R:0V
T:4.25V
R:4.24V
T:0V
R:3.31V
T:0V
R:4.26V
T:4.26V
R:4.92V
T:4.92V
R:7.45V
T:0.27V
R:7.49V
T:7.32V
R:3.29V
T:0V
R:4.80V
T:4.80V
R:2.44V
T:2.66V
R:1.98V
T:1.91V
7.49V
OPTDET
SPAF
EXTMICSW
MICI
AFSW
50V
PTT/RXD
TXD0
5VC
50CS
50CS
50CS
+B2
R 4 17
0
C426
0.15u
3
5
R418
120
C427
10u
R416
0
R419
390
L403
C428
0.047u
35
R421
10k
D90 2
DAN2 2 2
C907
10u
C909
0.047u
C908
100p
C921
100p
C910
1u
25
C906
0. 1u
C904
220p
C903
1u
2SK 3577-A
Q 9 0 4
C920
1000p
2SK 3577-A
Q905
R 913
100
2SA1362-F(GR)
Q902
J2
R912
680
IC902
XC6209B502P-G_9
1
NC
2
VSS
3
CE
4
VIN
5
VoUT
C918
100p
C915
100p
IC901
T A 7 3 6 8 F G
1 NC1
2 V CC
3 NC2
4 V I N
5 RI P P L E
6
NF
7
P H A S E
8
P RE -GND
9
P W - G N D
10
PoUT
Q901
RT1 N141U-T 111
R909
270k
C916
100p
C923
47p
C913
1u
C902
1000p
R906
150
R905
470k
R903
47k
C905
1u
C914
100u
6 . 3
R907
10k
Q 903
RT1N441U -T111
J 1
R910
47k
R908
330k
R902
56k
R90 1
10k
C922
1000p
R904
2.2k
C917 1000p
R 911
27k
C901
1000p
R914
5.6k
L415
56n
L409
220n
R425
0
C445
18p
L417
D416
1SV305F
C 480
0.1u
C469
R447
22
C463
1000p
2SC5383-T 111
Q 403
C 481
1000p
C 475
3p
D417
1SV305F
C438
100p
R448
470k
C467
0. 5p
C455
8p
D415
1SV325F
C454
180p
MCH3914(7)-H
Q 402
L422
120n
C473
12p
C470
1000p
D409
1SV325F
R441
470k
C451
L424
120n
R439
4.7k
C443
1u
R443
330
L405
1.8 u
L423
39n
R454
560
C466
0 . 5 p
L404
3.3 u
S SM3J05FU -F
Q407
R460
2.2k
C462
0.01u
C468
1
2p
R445
100k
D405
1SV325F
R440
100k
R452
100
C472
470p
D407
1SV325F
R 4 29
0
C460
4.7u
2SC 5108(Y )F
Q405
D402
1SV325F
R424
0
R446
22
R436
39k
L408
220n
2S C5636
Q408
R456
10k
C464
470p
R435
10k
C437
100p
C453
0.75p
D410
1SV278F
C465
180p
R430
0
L412
220n
L419
3.3u
C450
10u
MCH3914(7)-H
Q 401
C474
1000p
C446
33p
R461
47
D414
HSC119
R442
100k
R431
0
R458
3.3k
Q406
S S M 6 L 0 5 F U - F
C 482
R459
330
L418
3.3u
C461
470p
D411
1SV325F
C447
68p
R455
56k
L410
C458
12p
D404
1SV325F
L413
C471
10p
L411
220n
C459
15p
C4 4 1
100p
R 4 5 1
220k
C449
C448
4p
R450
4
7k
C478
1000p
R438
47k
C476
10p
R453
56
C477
10p
R4 28
0
D403
1SV325F
2SC5636
Q404
R444
330
L416
27n
C456
10p
L901
D9 01
1 SS4 1 6
Q9 06
R T1 N14 1 U- T1 1 1
C N 4
1
2
3
4
L902
L903
R917 0
R918 0
F 2
F53-0319-15
R919
100k
RXD
TXD
C440
100p
Q 907
U P A 6 7 2 T - A
R920
47k
R921
6.8k
L421
5.6n
L414
5.6n
R434
1 . 8 k
R437
47k
C 457
10p
C491
100p
C492
100p
C927
47p
R449
1k
MICI
PTT/RXD
SPO
AE
OPTDET
SPI
50V
MICO
TXD
TX VCO
RX VCO
10u
ASSIST TUNE
D402,405,409
RX VCO TUNE
TX VCO TUNE
ASSIST TUNE
D407,411,415
T/R VCO SW
T/R VCO SW
BUFFER AMP
RIPPLE FIL
SPEED
UP
BUFFER AMP
TX MOD
A VR (50V)
50V SW CONT
LEVEL CONV
DC SW
(AF PA AMP)
EXT/MIC SW
AF POWER AMP
DC SW(AF MUTE)
DC SW(AF MUTE)
AF POWER MUTE
Q904,905
REVERSE
CURRENT
PROTECT
D 9 01
AMP
BUFFER
FIN FILTER TUNE
D416,417
470p
15P
+B
+B
33A
50CS
50T
33A
50T
50R
2p
100n
220n
/T_R
CPout
50R
A
C91
470p
M I C 1
T91-0673-05
MIC SECTION
(X54-3760-XX)
(C/3)
E X T
MIC
E X T
SP
1A
6
Fin
OSC
OSC
APC
APC
5
5
/T_R
CV
BYPASS
I N T
SP
20
PTT2
TX-RX UNIT (X57-8040-10)