Kenwood TK-2140 Service Manual page 21

K
TK-2140
TX-RX UNIT (X57-6402-71)
TX VCO OSCILLATION
D1,3,7,8,804
D8 L13 D5
TX VCO
TX VCO 2SK508NV(K52)
10u
HVC376B
MODULATION
L8 D3 C32
10u HVC376B 68p
R37 C62 R33
22k
4.7u6.3 47k
D10 L14
RX VCO OSCILLATION
10u
HVC375B-E
Q2
L9 D4 C34
2SK508NV(K52)
10u
HVC375B-E 33p
L811
10u
D2,4,9,10,805
RX VCO
5C
SAVE
INT
5TC
5T
APC
+B
5R
SB
5MS
5M
CLK
DATA
RESET
EVSS
EN4
EN3
EN2
EN1
D7
D6
D5
D4
D3
D2
D1
D0
VOL
BATT2
BATT1
C335
0.01u
T:0.8V
R:0V(ON)
:3.2V(OFF)
5.01V
AUX
LSDO
HSDI
DSTB
BEEP
HSDO
XOUT
XIN
RESET
CLK
V_REF
EVSS
ME
DTSTD
SSW
DTCLK
5RC
DTMPD
SSW
PTT
X57-640 3/5
L
SCHEMATIC DIAGRAM
Q3
T:0.65V
R:0.75V
C44
0.5p(B)
VCO SWITCH
Q4
2SJ347F
T:0V
R34
R:4.23V
270k R19
22 R24
T:0V
1.0k R:4.85V
Q6
RN47A4-F
VCO SWITCH
C41
0.5p(B)
CP300
1k*2
76
EN3
CP301
77
1k*2
EN2
78
EN1
79
CP302
D7
1k*2
80
D6
81
CP303
D5
1k*2
82
D4
83
CP304
D3
1k*2
84
D2
85
CP305
D1
1k*2
86
D0
87
PF
88
VOL
30620M8A2W6GPU
89
CP306
BATT2
1k*2
90
BATT1
91
ASQL
92
TEMP
93
RSSI
94
AVss
95
LSDI
96
VREF
97
AVcc
98
SFTSTB
99
OE
100
AFDIR
R346
47k R621
0
M
TX/RX COMMON RF AMP
T:1.19V
BUFFER AMP
Q8
R:1.19V
Q5
2SC5108(Y)F
2SC5108(Y)F
C48 C49
T:0.83V
33p 15p
R:0.83V
T:3.94V
R:3.94V
L22
RIPPLE FILTER
Q7
2SC4617(S)
RIPPLE
FILTER
SWITCH
5C
SAVE
50
A18
49
A19
48
CSO
47
CS/MODE
46
SELF
45
SAVE
44
WR
43
BHE
42
RD
41
BLCK
40
HLDA
MPU 39
HOLD
IC309 38
ALE
37
RDY
36
CLK
35
DAT
34
RXD
33
TXD
32
DTCLK
31
DTMDAT
30
UL
29
SSW
28
SIDE1
27
SIDE2
26
PTT
DTSTD SSW
N O
D100,101
T:2.81V
TX/RX RF SWITCH
R:0V
C53 D101
10p HSC277
T:4.93V
R:4.93V
T:0V
R:2.81V
R230
0
1.0k
R352
A18
CP319
1k*2
CSO
CS
R351
0
R623
WR
0
CP320
1k*2
RD
R614 47k
R615 47k
CP322
1k*2
R617 47k
RXD
TXD
CP318
1k*2 R353
R618 47k 1.0k
CP323
47k*2
SIDE1
SIDE2
CP324
47k*2
SKEY
AKEY
BKEY
CKEY
L303
DTCLK
T/R
5TC
5T
APC
+B
5R
SB
5MS
5M
CLK
DATA
PF
BSHIFT
5CNS
5M
CLK
OE
STFSTB
ASQL
RSSI
V_REF
EVSS
ME
5RC
DTMPD
SSW
PTT