Kenwood TK-8160 Service Manual page 44

F
TX-RX UNIT (X57-7090-10)
RF AMP
BUFFER AMP
Q447
6.98V 1.63V
Q446 2SC5636
0.76V
C469 C470
2SC5636
6p 4p
R454
0
TX/RX
UL
XF351
R:4.07V R:0.76V
L71-0624-05
C351 C350
R353 R354 4 1
100k
33p 470 0.01u
Q351
2SC5636
IF AMP
R309
3.3k RECTIFICATION
SQL AMP
R:4.21V
Q301
C309
2SC3928A
C306
FLAMPO
0.022u
1000p
R:1.10V D301
R:1.65V
MA742
RSSI
NARROW
WIDE
PLLE
DTM/HSDI
DT
CK
EVLLD
DETSW
SCRSW
HSDSW
AFW
MICMT1
LOSDI
R273
Q241
RT1P141U
180k
W/N SW / TX (D)
MICEM
G
SCHEMATIC DIAGRAM
7.07V
C480
R460
0 5p
RF SW
R:0V
(TX/RX)
T:5.49V
D448 T:1.66V
HSC277
C502
4.85V
3p
RF SW
(TX/RX)
R:5.63V
T:0V
R463
R462
0
1k
TP
TH351
-t
3.3k
R:1.67V
L352
C349
R355
0.47u
0.01u 330
MIXER
R:7.00V
Q352
3SK318
D
G2
R:2.15V
S
G1
C359
R:0.71V
12p
R269
68k
(D)
C264
2.5V
33p
2.5V
1
AGNDIN
DTRAIN
2
TXIN AMP4O
3
AUDIO
TXINO AMP4N
PROCESSOR
4
LIMLV AMP4P
5
IC241
EXTLIMIN
AMP3O
AQUA-L
5.0V 6
MOD AMP3N
7
VDD AMP3P
8
DTRLOADN
VSS
9
STD
C251
0.047u
H
RF AMP RF AMP
Q500 Q501
2SC5110(O)
2SC3356(R24)
T:7.30V T:7.43V
T:0.13V
C509 C516
4p
4p
T:1.13V T:0.15V
D502
MC2850
TEMPERATURE
COMPENSATION
D351,352
R:7.12V
RF BPF TUNING
C371
R364 C367 C374
0 0.75p 7p
470p
R207
18k
25 R259
24 390k(D)
23
R258
C256 200k(D)
22
21 330p
20 R276
R257
100k
19 22k
C255
18
56p
17
XIN
R254 R255
470k
150k
R240
R250
0
1M
X241
R252 C252
R251 R253
0.1u
47k 100k 5.6k
L77-1968-05
3.6864MHz
I
TK-8160
R522
0
PRE DRIVE AMP
T:7.60V
Q502
RD00HVS1
L504 C523
R525 C526
3.3n
5.6
47p 9p
T:3.82V
VOLTAGE
PROTECTION
R:3.50V
RF AMP
Q353
D353-355
3SK255
RF BPF TUNING
L357 D
G2
C394 C395
C380 C383
39n
S
G1
R:1.90V 470p 1p 0.75p 6p
R:1.14V
R:2.09V
R277
22k
R256
47k
J
DRIVE AMP
Q503
PD55008TR
L505
5n
T:2.19V
TX/RX
UL
C386
1p
C390
R380
8p
0
R:2.07V
R381
100k
8TC
SQIN
RSSI
NARROW
WIDE
PLLE
DT
CK
EVLLD
DETSW
SCRSW
HSDSW
AFM
NICMT1
LSDI
MICEM
LIMSW
HSDI
DTMF/MSK
QT/DQT
41
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