Kenwood NX-203 Service Manual page 90

BI
NX-203
SCHEMATIC DIAGRAM
CN102
TH100
THP
50T
100k
-t °
BUFFER AMP
R : 4.769V
T : 4.789V
R : 1.53V
Q100
T : 1.149V
2SC5636
TX C100
R : 1.02V
T : 0.88V
15p
R104
50C
47
50T
+B
33C
3
19.2M
50R
R : 4.849V
T : 5mV
L201
560n
C209
R : 0.731V
100p
T : 3.6mV
L203
R211 C207
47n
330k 10p
R71
C203 0
7p
Q201
2SC5108(Y)F
2nd LOCAL
TRIPLER
CF200
450kHz
oUT
R222
50IF
10
C225
0.1u
C228
0.1u
C230
0.1u
R229
R248
10
R251
0
33C
50R
50IF
4
90
X57-895 (A/2) 3/4
BJ
LOCAL SWITCH
D100
C104 R105 C106 R111
10p 0 1000p 0
HSC277
D201
LOCAL
SWITCH
R : 63mV
T : 128mV
R : 3.274V
T : 11.2mV
R : 0.65V
T : 140mV
R126
2SC5383-T111
27k
R : 61mV
T : 110mV
APC
SWITCH
+B
R : 3.294V
T : 40mV
/APCSW
C295 C217
10p 47p
FM IC
IC202
TK10931VTL-G
R : 2.66V
T : -0.8V
1
oSC(B)
2
oSC(E)
C356
IN 3
MIXoUTPUT
0.1u
4
VCC
C314 CoMPoUTPUT
5
AMIFINPUT
0.1u
6
AMIFDECoUPLING
NoISEAMPoUTPUT
L230
NoISEAMPINPUT
C227
27u 7
FMIFINPUT
C261 AMAGCINPUT
0.1u
27p
8 AGCAMPoUTPUT
FMIFDECoUPLING1
9 RFAGCoUTPUT
FMIFDECoUPLING2
C231
10
RSSIoUTPUT
LIMoUTPUT
10p
11
QUADINPUT
12
10k
FMDEToUTPUT AMDEToUTPUT
CF201
450kHz
oUT
R257 C246
0 0.1u
IC203
MCP6021-E/OT
BUFFER
BK
DRIVE AMP
Q102
2SK3077F C178
R : 17.5mV
T : 1.596V
12p
C112
56p
H : 1.596V
L : 1.595V
R120
22k
APC PROTECT
R134
560
Q104
R144
APC SWITCH
150k
R145
150k
APC SWITCH
R : 13mV
Q109
T : 3.71V
SSM3K15TE(F)
R : 4.694V
T : 5mV
C206
24
RFINPUT
0.01u
23
GND
22
IF AMP
R221 100k
21
CoMPINPUT
20
C224 0.1u
R223
19
270k
18
C275 0.1u
17
R226 10k
16
R227 4.7k
15
C276 0.1u
14
AMSW
R231 22k
13
CN202
R233
18k
R : 2.03V
T : 85mV
C355 R236
IN
0.1u 2.2k
R : 1.81V
T : -100mV
33C
BL
TX-RX UNIT (X57-8950-11) (A/2)
PRE-FINAL AMP
Q103
RD01MUS1-T113
R : 0V
T : 2.11V
L105
R124 C117
47n
18 1000p
H : 2.07V
L : 1.66V
R156
1.8k
R148 R151 R155
180k 10k 470k
C143
IC100
TA75W01FUF
100p
1 8
OUT1 VCC
2 7
IN1- OUT-B
3 6
IN1+ IN2-
APC SWITCH
4 5
VEE IN2+
AUTO POWER
CONTROL
R : 7.11V
T : 1.52V
Q105
R154
LTC044EEBFS8
0
APC SWITCH
R : 18mV
T : 3.92V
R : 0.697V
XF200
R214
T : 3.6mV
58.05MHz
560k
C213 R216 OUT C220
IN
Q202 0.01u 220 0.01u
2SC4215-F(Y)
CN201
VAGC
R282
10k
RSSI
OP AMP
(RSSI/VAGC)
IC404
TC75W51FUF
R256
10k
5 4
IN+B VSS
6 3
IN-B IN+A
7 2
oUTB IN-A
8 1
VDD oUTA
R285
10k
BM
TX
50T
+B
Q110
EMD5
Q107
2SK1824-A
APC
SWITCH
R : 1.59V
T : 1.52V
1st LO
50R
R218
RX
220
4