Kenwood TK-3202 Service Manual page 29

F
TX-RX UNIT (X57-6890-XX)
CV
D2,4,6,7
VCO OSCILLATION (TX)
FREQUENCY
D6
CONTROL
/TX VCO
HVC376B
R22 L24 L10 D7
100n
0
HVC376B
TX MODULATION
R25 C45 R31 L12
R26
10k
22k 1u 470k
C902 R30
VCO OSCILLATION (RX)
1u 33k
HVC376B
L11
100n
HVC376B
D3,5,8,9
FREQUENCY
CONTROL
/RX VCO
QTTCXO
PLL_UL
PLL_STB
PLL_DAT
PLL_CLK
B
5T
OSCIN
SP1
SP2
5R
5C
EN1
EN2
EN3
EN4
EN5
VCC
VSS
R421
51
OPTDET
52
1k
AF_CONT
53
54
55
56
57
58
59
60
VCC
VCC
61
MICROPROCESSOR
62
VSS
VSS
63
GND
64 30622MAA-B95GU
GND
65
66
67
68
69
70
71
72
LEDTX
LEDTX
73
LEDRX
LEDRX
74
SIDE1
PF1
75
SIDE2
PF2
R415
47k
R416
R:3.70V
47k
T:3.57V
5T_C
5R_C
5C_C
RESET
INT
R404
470k(D)
4.96V
AF_CONT
OPTDET
PTT
5M
SB
G
SCHEMATIC DIAGRAM
T:3.37V
L19
220n
* C52
* L16 * C64
VCO/TX
Q4
2SK508NV(K52)
MODULATOR
R34 R36
270k
470k
R:3.4V
L18
R37
D8
220n
100
C55
D9 * * L17 * C65
VCO/RX
Q3
2SK508NV(K52)
R447
12k
25
24
23
DTRLOADN STD
22
QTVCO
DIR
21
TDATA/DTRCLK
20
DI/O
19
SCLK
18
RDF/FD
17
TCLK/DTRDO
16
INT
R419
15
VCC
14 47k
VCC
13
IC405
XIN
12
VSS
11
XOUT
10
RESET
9
8
BSHIFT
7 R420
GND
6 47k
BYTE
5
EEPCLK
4
EEPDAT
3
2
DTMF
1
PCTV
C431
0.01u
H
TK-3202/3206
R40
RF AMP
100
RF BUFFER AMP 2SC4619(P,Q)
Q6 3.86V
0.72V C78
2SC5108(Y)F C83
C73
33p
15p
0.5p
(B)
3.7V
DC SW/TX VCO
Q5
R:4.94V
DTA143TE
T:0.58V
L22
R:0.59V
T:4.94V
Q7
DTA143TE
DC SW/RX VCO
4.0V
C74
RIPPLE FILTER
0.5p
Q8
2SC4617(S)
CURRENT
STEERING
R901
4.7k
Q901
2SK1824
L404
R422
L78-1414-05
1k 7.3MHz
BSHIFT ON:4.95V
C432 R423
OFF:0V
Q407
5p 0
2SK1830F
BEAT SHIFT SW
IC406
BR24L08F-W
1 8
A0 VCC
2 7
A1 WP
R424
3 6 47k
A2
SCL
4 5
GND SDA
R425
47k
EEPROM
I
R:0V
TX/RX
T:2.846V
RF SW
4.62V
C87 D101 C101
Q9
10p HSC277 470p
R:2.934V
T:3.002V
TX/RX
RF SW
R:2.87V
T:0V
X2
BEAT SHIFT SW
Q408
C435
2SK1830F
5p
3.6864 MHz CLK
R301 C302
10k
270p
DETECTOR
D301
RB706F-40
R308
0
R354 R355
10k
10k
J
C102
12p
L250
18n
C290
2p
(B)
TH_DET
DCSW
B
5T
APCSW
OSCIN
SP1
RX LO1
SP2
5R
5C
MOD
RX_W/N
TX_W/N
DTRLOADN
STD
TCLK/DTRDO
TDATA/DTRCLK
DI/O
RDF/FD
SCLK
DIR
R426
XIN
0
R304
EXTLIMIN
27k
AMP3O
C354 R357
0.1u 0
TXD
PCTV
MIC_MUTE
QT/DQT_IN
BUSY
RSSI
AF_CONT
OPTDET
PTT
5M
SB
X57-689 2/4