Kenwood TK-3301 Service Manual page 29

F
TX-RX UNIT (X57-7772-70)
C44
R19 R21
27k 12k 1u
C45
1u
L10
180n
5C
2ND_LO
QTTCXO
PLL_UL
PLL_STB
PLL_DAT
PLL_CLK
B
5R
AFVOLIN
AFVOLOUT
MOD
5T
5M
EN1
EN2
EN3
EN4
EN5
PTT
SIDE1
SIDE2
INT
BATT
IC305
BR24L16F-W
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
GND SDA
EEPROM
5T_C
5C_C
5R_C
RESET
LEDRX
LEDTX
SB
G
SCHEMATIC DIAGRAM
R27 R30
680k 27k
R26
33k
T:3.19V
L17
D4,8
VCO 270n
FREQUENCY
CONTROL
/VCO
C64
D8 C53 5p
L16
27n
8p
1SV325F
VCO
Q5
2SK1875-F(V)
MODULATOR
PTTSW
LD
VOX
QTI
R313
THDET
1k
R309
0
PCTV
R310
0
C413
470p
QT/DQT_IN
VOX
RSSI
PCTV
H
RF AMP
Q9
0.78V
2SC5636
R32
470k
L21
R33 R50
100 0
C71
0.3p
RIPPLE
FILTER
Q10
KTC4075E(Y,GR)
Q6
KTC4075E(Y,GR)
RECTIFICATION
MDSW
R394
47k
61
EN2
62
EN1
63
DEST1
64
DEST2
65
PLL_UL
66
BATT
67
RSSI
68
BUSY
69
VOX
MCU
70
QT/DQT_IN
IC306
71
R5F212CCKCMD
EEPCLK
72
EEPDAT
73
TH_DET
74
DTMF
75
AVSS
76
PCTV
77
VREF
78
AVCC
79
PLLDAT
80 PLLCLK
C334
0.01u
C335
RESET MODE 10u
L303
AFCONT
BSHIFT ON:4.96V
C332
R319
OFF:0V
5p
(B)
Q305
BEAT SHIFT SW
2SC4919
AF_CONT
I
TK-3301
4.81V
RF AMP
Q11
4.45V
2SC5636
C78 C81
R:3.81V
T:3.71V
33p 15p
3.52V
3.99V
DTRLOADN
STD
TCLK/DTRDO
TDATA/DTRCLK
DI/O
RDF/FD
SCLK
PTT
DIR
TXD
R322
1k
40
39 R323
APC_SW 38 1k
LEDTX LEDRX
37
RX_SW
36
TX_SW
35
OPTDET
34
TXDATA TXD
33
RXD
RXDATA
32
NC
31
2TONE
30
NC
29
NC
28
NC
27
NC
26
NC
25
AFMUTE
NC
24
LED_BLUE
MICMUTE
23
AF_MUTE
22
MIC_MUTE
21
AUX1
W/N
5.00V
X301 BEAT SHIFT SW
L78-1433-05
Q306
14.746MHz
C337
2SC4919
R321
0
5p
(B) 10k
LEDRX
LEDTX
J
C86
10p
5C
2ND_LO
TH_DET
APC_SW
B
5R
AFVOLIN
AFVOLOUT
MOD
5T
BUSY
DTMF
DTRLOADN
STD
TCLK/DTRDO
TDATA/DTRCLK
DI/O
RDF/FD
SCLK
DIR
1/2_OSC
5M
PTT
OPTDET
TXD
MIC_MUTE
QT/DQT_IN
VOX
RSSI
PCTV
AF_CONT
SB
29
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