Kenwood TK-2140 Service Manual page 22

P
TX-RX UNIT (X57-6402-71)
PRE-DRIVE AMP
R102 C103
56k 39p
Q100
C101
2SC5108(Y)F
T:0.86V
R:0V
1000p
T:0.30V
R:0V
T:79mV T:4.68V
R:0V R:0V
T/R
5TC
5T
APC
+B
5R
SB
5MS
5M
CLK
DATA
PF
IC308
FLASH ROM
AT29C02090TU
17
A3 A3
18
A2 A2
19
A1 A1
20
A0 A0
21
D0 I/o0 A12
22
D1 I/o1 A15
23
D2 I/o2 A16
24
GND
25
D3 I/o3 VCC
26
D4 I/o4 WE
27
D5 I/o5 A17
28
D6 I/o6 A14
29
D7 I/o7 A13
30
CSO CE
31
A10 A10
32
RD oE A11
C341
L302 0.01u
5.01V
SHIFT REGISTER
IC311
BU4094BCFV
1
STRB
2
DATA
3
CLK
4
LEDR
5
LEDG
6
LCDBLT
7
LSW
8
VSS
SHIFT REGISTER
IC312
BU4094BCFV
1
STRB
2
DATA
3
CLK
4
AM1
5
DSW
6
T/R EMTON
7
DM
8
VSS
BSHIFT
5CNS
5M
CLK
OE
STFSTB
ASQL
RSSI
V_REF
EVSS
ME
5RC
DTMPD
SSW
PTT
Q
SCHEMATIC DIAGRAM
R106 C106
1.5k 39p
PRE-DRIVE AMP
Q101
2SC5192-A
T:0.89V T:4.83V
R:0V R:0V
L205 L206
C244
39n 39n
5p(B)
C236 C240
2p 1.5p
T:0V
R:4.82V
16
A4 A4
15
A5 A5
14
A6 A6
13
A7 A7
12
A12
11
A15
10
W :4.81V
A16
S-W:4.81V
9
N :0V
NC A18
8
7
WR
Q201
6
DTC144EE
A17
5
A14
4
W :0.38V
A13
S-W:0.38V
3
N :0.44V
A8 A8
2
CF200
A9 A9
L72-0962-05
1
A11
L301
16
4.96V
VDD
15
SOE
14
W/N
13
5TC
12
BSHIFT
11
DTMPD
10
NC
9
QS
16
4.96V
VDD
15 SQL
SOE RECTIFICATION
14
5RC
T:4.76V
13
R:0V
MSW
12
D200 R200
TEST
11
HVC131 220k
10
SQL
NC
VOLTAGE
9
CHARGE
NC
R
TX DRIVE AMP
Q103 R113 C119
2SK2596
0 1000p
L105
R111 C109
T:3.12V(H)
:1.35V(L)
27n
18 1000p
R:0V
T:1.80V(H)
:0.58V(L)
R:0V
R114
68k
5T
APC SWITCH R138
Q104
560
DTC114EE
R126
0
APC SWITCH
T:4.76V
Q105
R:0V
DTC114EE
R265
XF202
330k T:0V
44.85MHz
R:0.71V
L71-0530-05
C229 R227 OUT
0.01u 390
Q205
2SC5108(Y)F
IF AMP
T:0V
R:4.65V
X200
44.395MHz
L77-1760-15
C211 C212
W/N SWITCH
4.09V
1000p 22p
W :0V
R218 L201
S-W:0V
N :2.87V
1u
12k
C210
0.1u
CF201
C214
L72-0934-05 W/N SWITCH
D202 D203 0.1u
DAN235E DAN235E
W :0.38V
W/N SWITCH
S-W:0.38V
N :0.44V
W :4.81V
S-W:4.81V
N :0V
AF DETECT
SWITCH
Q203
2SK1824-A
R266 R219
T:1.90V
R:1.90V 220k
2.7k
R267
330k
C201
0.1u
T:0.87V
R:0.87V
Q208
2SC4617(S)
NOISE AMP
T:0.25V
R:0.25V
AF AMP,FILTER
C243
560p
HSD AMP R259 R260 C253
680k 180k 0.1u
5CNS
S
TK-2140
TX FINAL AMP
Q106
L109 L110 L710
2SK2595-E
L106
3T 5T 3T
27n
T:6.88V(H)
:7.22V(L)
R:7.50V
R131
150k(D)
APC PROTECT
C128
100p
1
R127
2
150k(D)
3
R128
4
150k(D)
C136
1000p
BPF
Q206
FRONT-END
1ST MIXER
L220
IN C231 R228
180n
0.01u 330
Q206
T:0V 3SK318
R254 R232
R:0.9V
0 560
C295
15p
IF IC
IC200
TA31136FNG
L905 C225
1 16
MIXIN
oSCIN
2 15 1u 0.01u
GND
oSCoUT
14
3
W :4.82V
N-REC
MIXoUT
S-W:4.82V
13
4
N-DET
VCC
5 12
RSSI
RSSI
IFIN
11 C221
6
DEC IFoUT Q503
RN47A4-F
10
7 68p R255 R264
QUAD
FILoUT
9 2.7k 180
8
AFoUT
FILIN
R256
47k
W/N SWITCH
W/N
DM SWITCH
R223
Q204
2SK1830F
180k
D209
D209
MA2S111-F
C215
DM CHARGE/
DISCHARGE SWITCH
15u6.3
C217 C205
R206
220p 33k 0.1u
Q903
W/N SWITCH
R911 10k
Q903
DTC144EE
D903
DAN235E
D902 R914
R915
C275 DAN235E
0
39k
4700p
R917
R916
180k 0
W/N SWITCH W/N SWITCH
T
C141
82p
T:1.58V
R:0V
T:4.89V
R:0V
R139
2.2k
R134
10k
8
oUT1 VCC
7
IN1- oUT-B
6
IN1+ IN2-
5
VEE IN2+
IC100
TA75W01FUF
APC AMP
5RC
APC
5R
T:0V
R:4.83V
T:0V
R:2.40V
CLK
DATA
PF
SB
5MS
N :0V
5R
5M
AM
LEDR
ME
LCDBLT
LEDG
SSW
PTT
X57-640 4/5