Kenwood 144MHz FM TRANSCEIVER K2E - Manual (Page 56)

TH-K2AT/K2E/K2ET
SCHEMATIC DIAGRAM
Y X W V U
1
2
3
4
5
6
7
-t
C83
0.01u
C84
0.1u
L13
R53
100
R47
5 .6k
D8
HSC277
D9
HSC277
IC2 NJM2904V
1
AOUT
A-IN
A+IN
4
GND
5
8
2 7
3 6
C109 1000p
C111 1000p
R77
150k
(D)
R76 150k (D)
R74
100k
(D)
R75
100k
(D)
R78
150k
(D)
R79
150k (D)
R80
10k
R81 390k
R82 27k
R83 56k
C110 1000p
R70 0.39 R71 0.39 R72 0.39
R86 5.6k
C136
10p
R91 1k
R46 10k
C128
0.01u
C125 1.5p
C126 10p
R90
330
R45 3.3k
C135
12p
D15
MA8039 C117 1000p
C113 1000p
2SK2596
Q11
C133 0.01u
R102
0
R55
470
C97
12p
(G)
C99
13p
(G)
C101
24p
(G)
C96 12p
(G)
R93
4
7
R94
330
C159
2p
(B)
C98 8p
(B)
C88 56p
R85 560
R84 100k
C108
100p
D14
MA2S111
D10
XB15A709
C114 1000p
L19 9T
L16
R97 82k
C69
4 p
R56
1 k
R58 10
R60 56k
C95
12p
(G)
C116 10u4
C115 1000p
2SK3476
Q12
R51
470
C129 11p
C65 18p
C118 1000p
C76 39p
C89
1000p
C93
8p
C100 7p
(B)
R92 3.3k
R54
100
R59 12k
C132 0.01u
Q14
RN4902
D12
HVC131
D13
HVC131
3SK318
Q16
D18
1SV305
D19
1SV305
D20
1SV305
D21
1SV305
R50
33
R49
330
C107 1000p
2SK1830
Q13
C61
1000p
C64
1000p
C67
1000p
C71
1000p
C75
1000p
C74 33p
C78
1000p
C82
1000p
C94
1000p
C162
47p
(G)
C163 1000p
C153 1000p C147 1000p
C134 1000p C130 1000p C131 0.01u
2SC5488
Q9
C91
1000p
R61 220
R62 220
C90
1000p
R98
82k
R96
82k
R95 100k
C141
1000p
L17
18.5n L20
7T
L21
9T
L10
82n
L11
82n
L54
56n
2SK1830
Q58
C323 1000p
C325 1000p
R41
270
R39
270
R271
12
C326
1000p
C327 0.1u
C328
1u
C329
56p
XF1
L71-0619-05
L41 18n
L40 68n
L38
82n
L35
82n
L32 82n
C148 22p (G)
C158 22p (G)
C145 22p (G)
C160 27p
(G)
C504
2p
(B)
L66 120n
R103 2.7k
R101
47
R104
56
2SK1215(E)
Q17
L12
10n
L15
6.8n
L55
10n
L56 22n
R64
0
C324 1000p
C106 1000p
C105 1000p
C152 1000p
C502
3p
(B)
C501
1.5p
(B)
C500
1.5p
(B)
R290
0
R88
330
C356 0.01u
C357
1u
L18
220n
TH1 10k
L14 47n
L27
680n
C85
56p
C366
100p
C503
100p
C73
1000p
C137
5p
C138 1000p
L29 22n L28
27n
D73
MA2S111
R52
1
k
R111
1.0M
R100 1.0M R99 1.0M
R110
1.0M
C68
18p
L23 9T
L22
9T
2SC4926YD
Q10
R42
100
2SC4617(R)
Q15
R33 22
R34
3.3k
C66 1u
R341
0
C142
1000p
C112 1000p
C72 0.1u
C70 1u
C92
1000p
D17
HSM88AS
C510 *
R345
0
R346
68
R347
100
R351 220
L26 470n
R291
0
CN10
VDD
APC
DIFFERENTIAL
AMP
DC SW
TEMP
COMPENSATION
TX PATH
1st MIXER
1st IF
38.85MHz
VGG
APC
ANT
KAPC
5T
RF AMP
DRIVE
AMP
DRIVE
AMP
POWER
AMP
APC CIRCUIT
OPERATION SW
APC OUTPUT SW
APC OUTPUT
VOLTAGE LIMITTER
Q12 GATE
VOLTAGE SW
OVER INPUT
PROTECTION
ANTENNA SW
D12,13
ANTENNA SW
RX 1st AMP
Q10 OPERATION SW
VOLTAGE
DROP
RF SW
RF SW
RX BPF TUNING
D18,19
D20,21
RX BPF TUNING
5T
5T
5T
+B
+B
5R
5R
5R
5T
KAPC
VGG
FINAL
TEMP
BPF/APC
REVERSE CURRENT PREVENTION
D14
B+IN
B-IN
BOUT
V+
TH-K2E
TH-K2AT
TH-K2ET
NO
R230
220
220
R257
56k
NO
NO
0
0
R258
680
R259
0
0
680k
R261
47k
NO
NO
NO
R264
0
0
R344
100k
NO
NO
E23-1081-05
NO
E23-1081-05
CN17
TH-K2AT 220 NO 0 0 NO 0 NO NO
TH-K2AT
TH-K2E
TH-K2ET
TH-K2AT
D44
B30-2205-05
B30-2205-05
NO
B30-2205-05
2-72
0-11
2-71
0-21
2-72
0-11
0-21
2-71
X57-674X-XX
X57-674X-XX
E
K,K2
E3
M,M2
E
M,M2
K,K2
E3
NO
B30-2205-05
B30-2205-05
B30-2205-05
D47 D60
NO
NO
NO
MA2S111
D62
MA2S111
MA2S111
MA2S111
NO
MA2S111
NO
NO
MA2S111
D63
NO
Q59
NO
2SK1830
NO
NO
NO
NO
C321
8200p
NO
C320
NO
NO
8200p
NO
0.1u
NO
C350
NO
NO
C510
100p
100p
NO
NO
NO
C511
470p
470p
C512
470p
470p
NO
NO
NO
NO
C514
470p
470p
NO
NO
470p
C515
470p
470p
470p
C516
NO
NO
470p
NO
470p
C517
NO
T:4.23V
R:0V T:4.85V
R:0V
1.30V
12.46V
12.29V
2.00V
1.40V
4.90V
2.29V
(HIGH POWER)
4.71V
2.68V
2.42V 4.66V
0.27V
Reference voltage value are measured when the power supply voltage is 13.8V(DC IN).
T:0V
R:0V
X57-674 5/5
TX-RX UNIT (X57-674X-XX)(A/3)
Note : The components marked with a
dot ( ● ) are parts of layer1.