Kenwood TK-3202L Service Manual page 30

F
TX-RX UNIT (X57-6890-XX)
CV
D2,4,6,7
VCO OSCILLATION (TX)
FREQUENCY
D6
CONTROL
/TX VCO
HVC376B
L10
R22 L24 D7
100n
0
HVC376B
TX MODULATION
L12
R25 R26 C45 R31
22k 10k 1u 470k
C902 R30
1u VCO OSCILLATION (RX)
33k
L11
100n
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 30622MCAC02GU
GND
65
66
67
68
69
70
71
72 LEDTX
LEDTX
73 LEDRX
LEDRX
74 PF1
SIDE1
75 PF2
SIDE2
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 C64
* L16 *
*
VCO/TX
Q4
2SK508NV(K52)
MODULATOR
R34 R36
270k
470k
R:3.4V
L18
D8
220n
HVC376B
D9 C55
* * L17 C65
*
HVC376B
VCO/RX
Q3
D3,5,8,9
2SK508NV(K52)
R447
12k
25
24
23
DTRLOADN
STD
QTVCO 22
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
R420
7
GND
6 47k
BYTE
5
EEPCLK
4
EEPDAT
3
2
DTMF
1
PCTV
C431
0.01u
H
R40
100
RF BUFFER AMP
Q6
0.72V
2SC5108(Y)F C78 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
R37
Q7
DTA143TE
100
DC SW/RX VCO
4.0V
C74
RIPPLE FILTER
0.5p
Q8
2SC4617(S)
CURRENT
STEERING
R901
4.7k
W/N SW/TX
Q901
2SK1824-A
L404
R422
1k
BSHIFT ON:4.95V
C432
OFF:0V
Q407
2SK1830F 5p
BEAT SHIFT SW
EEPROM
IC406
BR24L08F-W
1 8
A0 VCC
2 7
A1
WP R424
3 6 47k
A2 SCL
4 5
GND SDA
R425
47k
I
TK-3202L
TX/RX
RF SW
4.62V
RF AMP
C87 D101
Q9
2SC4619(P,Q)
10p HSC277
3.86V
R:2.934V
T:3.002V
TX/RX
RF SW
R:2.87V
T:0V
X2
BEAT SHIFT SW
L78-1414-05
7.3MHz Q408
C435
R423
2SK1830F
0
5p
C302 R304
R301
10k 270p
27k
DETECTOR
D301
RB706F-40
R308
0
R354 R355 C354 R357
10k 10k 0.1u
J
R:0V
T:2.846V
C101 C102
470p 12p
L250
18n
C290
2p
(B)
DCSW
B
5T
APCSW
OSCIN
SP1
RX LO1
SP2
5R
5C
TH_DET
MOD
RX_W/N
TX_W/N
DTRLOADN
STD
EXTLIMIN
TCLK/DTRDO
TDATA/DTRCLK
DI/O
RDF/FD
SCLK
DIR
R426
XIN
0
AMP3O
0
RXD/PTT
TXD
PCTV
MIC_MUTE
QT/DQT_IN
BUSY
RSSI
AF_CONT
OPTDET
PTT
5M
SB
X57-689 2/4