Tx-Rx Unit (X57-7102-70) - Kenwood TK-7160 Service Manual

A
TK-7160/7162

TX-RX UNIT (X57-7102-70)

1
2
1.52V
3
R:0.64V
4
5
CN2
E40-5702-05
1 SB
2
3 GND
D4 D6
4 DETO
DA221
DA221
5 FNC1
6 FNC2
FNC3
7
8 FNC4
9 FNC5
10 FNC6
11 FNC7
FNC8
12
6
E40-6292-05
CN3
IGN
1
DATAI
2
3 DETO
4 TXAFI
5 TXAFO
EMGMIC
6
RXAFO
7
8 ALTI
9 RXAFI
10 5C
8C
11
7
42
X57-710 1/4
B
SCHEMATIC DIAGRAM
VOLTAGE
DROPPED
D421 R421
8.2k
HZU5ALL
R422
10k
R401 1k
R402 1k
R403 1k
X401
L77-1944-05 5.0V 4.93V
R409 C413
VC
5C
100 0.1u
16.8MHz
C414
L402
GND XOUT
10u 10u6.3
TCXO
R408
100k
C343
68p
R:7.21V
L341 C341
330n
100p
Q341
2SC3928A
BUFFER AMP
D4-11
SURGE
ABSORPTION
SB
5M
TXAFO
TXAFI
RXAFI
D10
D8
DA221 DA221
DETO RXAFO
FNCI 5C
FNC2
FNC3
FNC4 DETO
FNC5 8C
FNC6
FNC7
FNC8
IGN
DATAI
DETO
TXAFI
TXAFO 5C
RXAFO
ALTI
RXAFI
5C
8C
5C
C
R424
470
Q421,422
CHARGE PUMP
Q421
2SA1832(GR) R426 R427 R429
Q422 2.7k 1.5k
1k
2SC4738(GR)
PLL SYSTEM
IC401
MB15A02
RF AMP
TX VCO
6.89V
Q431
L446 D444
0.701V
2SC4649(N,P)
C431 R431
270n
MA2S304
1000p
0
TX VCO
RIPPLE
FILTER
R449
100k
4.96V
W:4.94V
N:0V WIDE
CF331
L72-0993-05
IF SW
IF SW
D332
D331
MC2858 MC2858
CF332
L72-0999-05
NARROW
W:0V
N:4.94V
R:7.9V
DUAL GROUND
SENSE OP-AMP
IC214
BA10358FV
8
1
oUT VCC
7
2
-IN1
oUT2
3 6
+IN1
-IN2
4 5
VEE
+IN2
R221
4.7k
R801
100k
DUAL GROUND
IC215
SENSE OP-AMP
BA10358FV
5 4 C220
+IN2 VEE
Q212
6 3 0.1u
2SK1830
-IN2 +IN1
EMERGENCY MIC
7 2
oUT2
-IN1
8 C230
1
VCC oUT
10u6.3
8.0V
D
CV
C445
4.5p
RX VCO
R:5.98V
RX VCO
Q441
D442 2SK508NV(K52)
L421 L441 C441 L443
270n 33n
30p
MA2S304
RX VCO
Q442
R:0V
2SJ347
T:6.79V
R443
220
C458
4.31V 10p
Q444
C453 2SK508NV(K52)
L448
47n
47p
TX VCO
7.93V Q445
2SC2412K
MODULATION
L451
R450
47k
RIPPLE
FILTER
FM IF
SYSTEM
IC321
TK14489V
1 20
50,4MHz
OSC(B) RFIN
2 19
OSC(E) GND
3 18
7.92V
NC Hy_C
4 17
C324 0.1u
MIX_O SCAN
5 16
R307
VCC
SCAN
6 15
IF_IN 270k
SQLIN
C323 7 14
0.1u
DEC1
FLAMPO
C322 8 13
0.1u
DEC2
FLAMPI
R323 9 12
2.2k
PH_S RSSI
R322 18k 10 11
AFO
QUCO
L321
L34-4554-05
C223
Q213
2SK1830
0.1u
MIC MUTE
R201
120k
C203
C222
0.033u
C202
Q201 0.1u
2SC2412K
4.7u6.3
TX AF
(DETO)
D212
MC2858
R216
R218
R217 0
820
D211
100 AGC
1SS372
OR GATE
C215
0.1u
Q211
2SC4919
C214
39p
AGC/MIC MUTE 1
R214 330k
L211 C218 R219 C227
R215 2
2.2k
0.1u 22k 0.1u 3
2.5V
4
C219 R222
0.1u 22k
R223
1k
E
R:1.15V
C447
0.3p
Q442,443
T/R SW
6.88V
Q443
KRX102U L452
R445
1k
R:4.78V
T:0V
T:0.93V
C460
0.5p
6.88V
Q445
RIPPLE
FILTER
7.58V
TX/RX
UL
AFV
FLAMPO
RSSI
NARROW
WIDE
CK
DT
PLLE
FREQO
BLI
PC/TVO
TVO
5C
DTM/HSDO
DETSW
SCRSW
HSDSW
AFW
5.0V
14
1
I/O1
VDD
13
2
O/I1
C1
12
3
O/I2
C4
4 11
I/O2
I/O4
5 10
C2
O/I4
9
6
C3
O/I3
8
7
VSS
I/O3
IC213
BU4066BCFV
QUAD ANALOG SW
MICMT1
LSDI
5.0V
MIC AMP
IC211
R212
NJM2100V
8 75k
V+
7
R213
6
5 75k
2.5V
C211
C213
0.1u
0.018u
MICEM