Kenwood TK-2202L Service Manual page 28

F
TX-RX UNIT (X57-6870-21)
CV
D4,7
FREQUENCY
CONTROL
/TX VCO
VCO OSCILLATION (TX)
D7
R22 L24 L10
180n
0
1SV325F
R25 C45
R26 R31
10k
22k 1u 560k
R30
C902
1u
12k
VCO OSCILLATION (RX)
L11
100n
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 IC405
30622MCAC02GU
64
GND
65
66
67
68
69
70
71
72
LEDTX
LEDTX
73
LEDRX
LEDRX
74
SIDE1
PF1
75
SIDE2
PF2
R415
47k R416
47k
R:3.70V
T:3.57V
5T_C
5R_C
5C_C
RESET
INT
R404
470k
4.96V
AF_CONT
OPTDET
PTTSW
5M
SB
G
SCHEMATIC DIAGRAM
L19
220n
C64
VCO/TX
4p
C52
L16
39n
180p
Q4
2SK508NV(K52)
MODULATOR
TX MODULATION
L12 R34 R36
4.7k 270k
R:3.46V
L18
220n
C65
VCO/RX
D9
C55 L17 5p
27n Q3
120p
1SV325F
2SK508NV(K52)
D5,9
FREQUENCY
CONTROL
/RX VCO
R447
4.7k
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
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
T:3.42V
R40
100
RF BUFFER AMP
Q6
0.72V 2SC5108(Y)F C78
C73
33p
0.5p
(B)
3.74V
DC SW/TX VCO
Q5
DTA143TE
R:4.97V
T:0.59V
L22
4.0V
R:0.60V
T:4.95V
R37
Q7
DTA143TE
100
DC SW/RX VCO
C74
RIPPLE FILTER
0.5p
Q8
2SC4617(S)
CURRENT
STEERING
R901
4.7k
W/N SW/TX
Q901
2SK1824-A
L404
R422
L78-1414-05
1k 7.3MHz
BSHIFT ON:4.95V
C432
R423
OFF:0V
Q407
5p 0
2SK1830F
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-2202L
4.74V
IC2
UPB1509GV
1 8
C81
VCC1 VCC2
15p
7 C83
2
IN OUT
C82
3 6 1000p
IN SW2
1000p 4 5
SW1
GND
VCO 1/2 DIVIDER
X2
BEAT SHIFT SW
Q408
C435
2SK1830F
5p
3.6864 MHz CLK
R301 C302
47k
0.01u
R308
0
R354
R355
10k
10k
D301
RB706F-40
DETECTOR
J
DCSW
B
5T
APCSW
OSCIN
SP1
TH_DET
SP2
5R
5C
MOD
RX_W/N
TX_W/N
DTRLOADN
STD
TDATA/DTRCLK
DI/O
TCLK/DTRDO
RDF/FD
SCLK
DIR
R426
XIN
0
R304
EXTLIMIN
560k
AMP3O
C354
R357
0.1u 0
PCTV
TXD
QT/DQT_IN
MIC_MUTE
BUSY
RSSI
AF_CONT
OPTDET
PTTSW
5M
SB
X57-687 2/4