Rf Unit - Icom PMR446 Service Manual

11-2 RF UNIT

C1
0.001
R1
820
T: 0
FI3
R: 2.60
CFWM450G
T: 0
2 1
R: 1.72
C74
5 4 3
470 P
C79
10
R52
C75
C73
1.5 k
470 P
0.1
R53
R51
150 k
560 k
2nd-Lo (21.25 MHz)
R54 R55
10 k
15 k
IC2
R56
15 k TA31136FN
C76
R59
440 P
15 K
C77
22 P
R58
4.7 k
T: 0
C78
R: 2.94
R57
68 P
2.2 k
X2
CDBCA450CX24
C80
0.22
C67 R60
0.1 100 k
C81 C82
0.047 0.1
C83 R61
1 10 k
T: 0
R: 0.98 R71
10 k
R67
C89
C90
680 k
0.0068
0.01
Q15
2SC4081 S
C96
470 P
R66 R68
12 k 390 k
R69
3.9 k
T: 0 C91
R: 1.84 0.047
R70
27 k
T: 0 T: 0
R: 1.83 R: 0.72
FI2
R2 C36
FL-297
82 k 8 P
R3 C47
1 k 22 P
L1 Q2
C46
2.2 µH
R4
12 P 3SK284
560
Q1
2SC4215 O
C101
1 P
R19
C2
330
0.047
C28 C3 C212
470 P 0.047 0.001
C: 2.82
C13
EP2 MMZ1608D121B
47 P
R313
10
IC1
µPD3140GS
R27
100 k
1 20
VCC1 GND1
2 19
IN1 IN2
3 18
ENB VCC2
4 17
CLK XB
5 16
DATA XI
6 15
T1 XO
R305
7 14
3.9 k
LOK GND2
8 13
R302 CP1 CP2
9 12
10 k
FI1 FI2
10 11
FO1 FO2 R88
4.7 k
C62
0.033
X1
CR-669
C63
10 P
C42 C43
10 P 18 P
C48
22 P C215
T: 0
470 P
R: 0.75
R50
47 k
MOD
J2
SHIFT
1 2
CK
3 4
DATA
5 6
STB
7 8
SQL
9 10
SENS
11 12
AF
13 14
to MAIN unit J4
T: 0
R: 0.97 R75 C95
10 k 470 P R83
R73
10 k
680 k
VOL
C92 C93
0.01 0.01
Q16 T: 0
R: 1.85
2SC4081 S
R72 R74
390 k
8.2 k R76
3.9 k
11 - 2
T: 0 T: 0 T: 0
R: 2.19 R: 0.27 R: 2.28
C32
C219 Q3
R310
5 P 6P
330 k 2SC4226 R25
1 2
FI1
NSVS647
R16
L211
27 nH 33
3 4 5 6 7 8
L3
18 nH
L209 R303
C6
0.1 µH
47 k
R7 470 P
R304
47
270
R+3
C5
470 P
C35
R6
0.001
4.7 k
1st LO
T: 0
R: 1.14
C16
470 P
C88
D1 10
C61
MA77 R12
5 P
T: 1.45
1 k
R: 0.40
D2
MA77
R306 R10
R208
8.2 k 8.2 k
1 k
R45
8.2 k
C17
0.033
C68
0.68
T: 2.85
R: 0.01
R33
8.2 k
R34
C54
680
3.5 P
C52
L12
Q12
10 µH 2 P
2SC5006
C64
0.22
C50
D4
12 P
R30 1SV284
33 k
C56
L13
R31 0.5 P
27 nH
33 k
D5
C85
C20 R29
1SV284
4.7 C51 C53
470 P
47
12 P 1.5 P
L11
10 µH
C: 0.70
Q6
PSC
2SC5108 Y
BATT
C: 0.75
T+3
R+3
L25
4.7 µH
D9
1SS355
R64
56
C: 3.02
C86
0.22
T: 0 T: 0.85
R: 0.77 R: 0
C31 C30
L206
L4 L5
7 P 7 P
12 nH 18 nH
17 nH
C7
22 P
C210 C209
C44
7 P 6P
27 P
C9
1.5 P
L10
C8
D102
22 nH
R25
6 P
MA2S077
D101
33 k
MA2S077
D7
MA2S077
C65
470 P
T: 1.67
R: 0
T+3
T: 2.95
R: 0
R86
C26
C70 W201
68
470 P
470 P
C201
470 P
C21
470 P
R37 L201
C102
22 k 22 nH
L21 R202
2 P
22 k
22 nH
C23
7 P
W202
T: 2.24
R: 0
Q201
T: 0.46
R: 0.84 2SC3356 R24
T: 0.85 Q8
R: 0
2SC4228 R44
R213
220
D103
MA2S728
R36
220
C: 1.22 C: 1.89
C55
470 P
L14
33 nH
C57 L15 C69 C216
2 P
82 nH 0.001 1.5 P
W5
R35
47 k
L208
10 µH
Q7
2SC5108 Y C84 C60
R62
470 P 22
18
C: 4.5
C: 2.99
Q13
2SC4081 S Q14
2SA1586 GR
C: 2.47
R93 C: 3.06
D8
R65
1SS355 10
C87
3.3 k
0.1
CHASSIS
EP1
L6 L23
17 nH 15 nH
C11
0.75 P
RF TEST PORT
C10 C12 1
10 P 8 P
2
J1
L205
68 nH
C72
470 P
R+3
R209
220
C206 L203
R205
0.001 39 nH
10 k
C208
T: 2.37
9 P
T: 1.78
R: 0
R: 0
Q202
XRF9482
L204
8.2 nH
C203 C202 C207
22 P 22 P
8 P
R207
1 k
C204
6 P
R206
10 k
L202
C205
33 nH
0.001
R301
8.2 k
R311
470
C218
L210
470 P
33 nH
C217
6 P
R312
82 k
Q203
2SC5108 Y
T: 3.64
R: 0
T: 0
R: 2.94
T: TX
R: RX
C: COMMON