Rf Unit - Icom IC-4008A Service Manual

11-2 RF UNIT

T: 0
C74
R: 2.60 FI3
470 P CFWM450E
2
1
T: 0
R52
C75 C73
5 4 3 R: 1.76
560
470 P 0.1
R53
100 k
R51 560 k
T: 0
R: 1.86
R54 C1
R2
NTCCF20123NH 0.001
82 k
IC2
R55
TA31136FN
15 k
R1
820
Q1
R56
R59
15 k 2SC4215
1.8 k
C76
470 P
C2
0.047
R58
4.7 k
C77
C79
22 P T: 0
10
R: 2.96
C78
R57
68 P C80
1.2 k
0.22
X2
CDBCA450CX24
C81
0.047
C83
C67 1
0.1
T: 0
R: 0.99
R67
C89 680 k
0.0068
Q15
R66 C90 R68
2SC4081
12 k 0.01 390 k
2nd LO
(21.25 MHz)
T: 0
T: 0
R: 0.72 R: 1.98
T: 0
FI2 R: 0.72
C36
R3 C46 R4 R5 L19
FL-298
10 P 27 nH
1.8 k W8 22 P 2.2 k 100 k
L1
2.2 H
C35
0.5 P
Q2
C28
2SC4226
470 P
R6
R19
4.7 k
470
C3
C: 2.83
0.047
C4
470 P
C48
0.01
R60 100 k
C82
0.1
R61
10 k
R76 3.9 k
C96 T: 0
R71
470 P
R: 0.95
10 k
R72
Q16
8.2 k
C91 C92
2SC4081
0.01
0.047
C93
R74
R70 0.01
T: 0 390 k
R69 R: 1.82 27 k
3.9 k
R73
R75
680 k
10 k
11 - 2
T: 0
R: 2.61
FI1 NSVA468 C32
6 P
1 2
C45 3 4 5 6 7 8
R16
10 P 33
L3 Q3
18 nH
2SC5149
R7
47
C5
470 P
C13
0.001
T: 0
C15
C: 2.80
R: 1.12
0.047
C16 T: 0.42
470 P R: 0.36
IC1 TB31202FN
L207
W6 18 nH
1 FIN2 16
R27 FIN1
47 k 2 15
VCC VCC C61
C211
3 14
5 P 0.001
CP1 CP2
4
13 R10 C17 C18
GND GND
8.2 k 0.022 0.001
5 12 W4
C100 R212
LD SW R211
22 P 180
6 11
27
CK XIN C62
7 10
0.01
DATA XOUT
R45
8 9
C69
STB BO 4.7 k R210
8 P
180
X1 C68
CR-633 1
C42 C43
R88 C63
12P T: 2.85
10 k 33 P CTZ3S-20C
R: 0.01
20 P
Q12
L12
2SC5108 10 H
R32 C64
0.22
6.8 k
C50
D4
12 P
1SV284
T: 0.18
R50
R: 0.78
EVM-1XBQ4 D5
C85 R30
47 k
C20 1SV284
R29 C51
4.7 33 k
470 P 180
12 P
L11
10 H
MOD
UNLK PSC
1 2
CK BATT
3 4
DATA
5 6
STB T+3
7 8
SQL
9 10
SENS R+3
11 12
L25
AF
13 14
4.7 H
VOL
C95
470 P
R83 10 k J2
T: 0
4-175643-4
R: 1.72
T: 0 T: 0.57
R: 0.82 R: 0
C31 C44 C30
L4 L206
12 nH 18 nH 7 P 27 P 7 P
C7
C210 C209 D7
22 P
7 P 6 P
MA2S077
L10
R25 22 nH
33 k D102 D101
MA2S077 MA2S077
C8
6 P
T: 1.47
C6
R: 0
470 P
C65
470 P
T+3
R86 T: 1.38
C70 C26
C88
R: 0
68
4.7 470 P 470 P
C201
D1
470 P
MA77 C21
R12
470 P
1 k
L201
R37
L105
22 nH
R202
22 k L21
82 nH
22 nH 6.8 k
C23
3 P
W202
D2 C102
MA77 T: 1.16
1.5 P
R: 0
Q201
R208
T: 0.75
2SC3356
1 k Q8
T: 0.72
R: 0.84
R: 0
2SC4228
R213
220
D103
MA2S728
R33 8.2 k
R34
C54 C: 1.22 R36
680
220
3.5 P
C52
C: 2.01
2 P
C55
470 P
L14
33 nH
C56 L15
D9
L13
R31 0.5 P 82 nH
1SS355 C: 2.99
W5
27 nH 33 K
R35
C53
47 k
C57
1.5 P
1.5 P
L208
R64
10 H
C: 0.75 56 k
Q6 Q7 C86
C: 0.70 R65
C: 3.02
0.22
2SC5108 2SC5108 3.3 k
T: 1.56
R: 0.02
C: COMMON
T: TX
R: RX
EP1
L5 L6 L23
17 nH 17 nH 15 nH
C9
1.5 P
C11
0.75 P 1 J1
IMSA-9210B-1-02T
2
RF TEST PORT
C10 C12
10 P 8 P
R+3
1st LO
R205
NTCCM16083NH221KC [CSA/-1]
R205
1 k [ITA/-1]
L203
C206
8.2 nH
C208
0.001
T: 1.51 9 P
R: 0 T: 1.20
R: 0
C202
22 P L204
8.2 nH
C207
C203
8 P
22 P C204
R207
8 P Q202
1 k
MRF9745
L202 C205
33 nH 0.001
R301
12 k [ITA/-1]
1 k [CSA/-1]
C60 C84
R62
22 470 P
18
Q14
2SA1586
Q13
C: 3.06
2SC4081
C: 4.5
C: 2.49
L205
68 nH
D8 R93
C87
10
1SS355 0.1
C72
470 P
T: 0 R209
R: 2.96 220