Kenwood NX-220 Service Manual page 104

AO
NX-220
TX-RX UNIT (X57-8040-10)
+B
D412,413
T/R SW
D413 C102
R102
1000p 18
HSC277
50T
R:0V
T:4.98V
RX:4.68V
TX:0V
R3 4 0
560k
Q303
2SC4215-F(Y)
IF AMP
/T_R
OSC
50T
R301
L302
50R
33A
560n
560
5
C301
R302
APC
1k 0.01u
2SC5108(Y)F
R:0.68V
T:0V
R357
820
R305
10
C314
0.1u
C315
0.1u
R310
10k
104
X57-804 7/8
AP
SCHEMATIC DIAGRAM /
R474
0
PRE DRIVE AMP
2SC4926YD
Q102
L121 C106 L102
33n
100n
1000p
Q110
S S M 6L0 5FU- F
R:0V
PD SW
T:3.31V
R:4.87V
L308
R335
T:0V
220
X F 1 49.95MHz
C353 R345
R346
270
0.01u 270
R:0.68V
T:0V
R:3.84V 100p
C3 10
T:0V
L305
C307 C313
R306 R308
0
330k 10p 56n 33p
Q301
TRIPLER
R:3.44V
IC302 TK10931VTL-G
T:0V
C F1
1
OSC-B
oUT
IN
24
RFin
2
OSC-E
GND 23
3
MIXout
COMPout 22
4
Vcc
21
COMPin
C322
5
AM-IFin
20
NOISEout
0.1u
6
AM-DCPL
19
NOISEin
C323
7
FM-IFin
AM-AGCin 18
0.1u
8
FM-DCPL1
AGCAMPout
C 3 16 17
9
FM-DCPL2
16
RF-AGCout
C327
0.1u
10
LIMout
RSSIout 15
10p
11
QUADin
AMSW 14
12
FM-DETout
13
AM-DETout
FM SYSTEM
AQ
原理图
RD01MUS1-T113
R:0V
T:0.53V
C113 R115 C114
33p
12
1000p
R:0V
T:4.68V
R 144
27k
R204
C360
4 . 7 k
0.01u
BPF
L203
270n
C319
0.01 u
R203
680
C338
0.01u
R326
100k
C339
0 .1u
C340 0.1u
R327 10k
R328
4.7k
C341 0.1u
R329
22k RSSI
R330
18k CN301
C343 0.47u
R:1.99V
T:0V
AR
DRIVE AMP
C120
Q103
100p
L104
39n
R:0V
T:2.45V
APC SW
Q105
2SC5383-T111 R147 R148
1k
560
APC PROTECT
L204 L205
33n
33n
C211
C213
5p
4p
R:3.33V
R:4.63V
T:0V
T:0V
MIXER
C216 C218
Q201
3SK318
1000p
R:1.70V
T:0V
R:2.90V
T:0V
Q201
DC AMP (RSSI/ASQL)
IC304
T C 75W 51F K ( F )
5 I N +B
V S S 4
R352
6 I N -B
I N +A 3
10k
7 oUT B
IN - A 2
8 V DD
oU T A 1
C 3 54
0. 01u
R 344
6.8k
AS
+B
L107
4.7n
R:0V
T:1.63V
R149
1k
APC SW
50T
50R
7p
5
APC