Kenwood TK-2202 Service Manual page 36

K
TK-2202/2206
TX-RX UNIT (X57-6870-20)
D101,202
TX/RX
RF SW
4.6V
D101
C87
2.2V
R:1.65V
10p
HSC277
T:1.05V
Q9
2SC5108(Y)
RF AMP
R:2.84V
T:0.03V
DCSW
B
5T
APCSW
OSCIN
SP1
TH_DET
SP2
5R
5C
MOD
RX_W/N
TX_W/N
DTRLOADN
STD
TDATA/DTRCLK
DI/O
STD
10
TCLK/DTRDO DTRLOADN
TCLK/DTRDO
11
TDATA/DTRCLK
12
DI/O
R306
13 IC301
RDF/FD
RDF/FD
AQUA
1k
14
SCLK
SCLK
AUDIO PROCESSOR
15
DIR
DIR
16
XOUT
XIN
EXTLIMIN
C309 C313
82p 120p
R310
R313
C311
390k 100k
AMP3O
1u
PCTV
TXD
QT/DQT_IN
MIC_MUTE
RXAFO
BUSY
RSSI
SB
PTTSW
AF_CONT
OPTDET
5M
X57-687 3/4
L
SCHEMATIC DIAGRAM
T:4.9V
R108
T:1.11V
1.5k
RF AMP
C101
R103 C104
Q102
2SC4926YD
1000p 39p
0
R:0.1V
T:1.88V
L202 L205
68n
39n
C233 C237
2p 5p
(B) (B)
T:2.7V(H)
Q104
1.99V(L)
DTC114EE
APC PROTECT
APC SW
APC SW
Q105
2SK879(Y)
R316 C320
R319
120k 0.01u
56k
C312
12p
C315
R322
180k
1u
R323
32 56k
AGND
31 R324 R329
RXIN
30 100k 82k
RXINO
29 R325
FILTERO
C328 100k
28
EXPOUT
27 390p
RXAFIN
C322
26 R321
RXAF
220k 0.015u
R326
C325 0
0.1u
C331
C326 R331
39k
1000p 0.1u
R330
3.3k
M N
TX DRIVE AMP
T:1.88V
C110 L104 Q103
C108 R112
2SK2596
27n
39p 18
1000p
R135
150k
(D)
C140
IC101
TA75W01FU
100p
1
OUT1
R130 2
IN1- OUT-B
150k
3
(D) IN1+
4
VEE
R131
150k
(D)
COMPARATOR
(APC)
R134
150k (D)
Q107
DTC114EE
APC SW
oUT
C210
R208
82k
470p
W/N SW/TX
Q301
FM IF
DTA114EE
SYSTEM
IC201
TA31136FN
C329
R210
3.3k
1u
W/N SW/RX
Q202
DTA144EE
W:0.011V
N:4.98V
RXAFO RXAFI
C330
R446
0
1u
MICO MICI
DETECTOR
D302
R445
RB706F-40
R318
C317
0
1.2k
0.1u
C316
R314
10k 0.1u
O
TX FINAL AMP
R:7.68V
T:7.30V
C120 L107
Q106
R120
2SK2595
1000p 27n
0
APC SW
Q109
DTA144EE
8 C146
VCC
7
1000p
6
IN2-
APC SW
5
Q108
IN2+
2SK1824
R141
100k
MCF
XF201
L71-0619-05
38.85 MHz
C231 R219
IN
2 1
560
0.01u
CF201
L72-0973-05
C213
0.1u
C219 R216
120k
33p
IF AMP
Q203
2SC4649(N,P)
R211
3.3k
ISOLATION
MIC AGC
D303
Q302
DAN222
2SC4919
R328
10k
R332 C333
15k
0.1u
C310
R311 R360
0
12k
0.068u
RX LO1
5T
5R
PCTV
SP2
TXD
SB
PTTSW
AF_CONT
OPTDET
5M