Icom PMR446 - RF Unit Voltage Diagram; RF Unit Voltage Distribution

11-2 RF UNIT
11 - 2
T: 0
R: 0.72
T: 0
R: 1.83
T: 0
R: 2.60
T: 0
R: 1.72
T: 0
R: 2.94
T: 0
R: 0.77
T: 0
R: 2.28
T: 0
R: 0.27
T: 0
R: 2.19
C: 2.82
T: 0
R: 0.97
T: 0
R: 1.84
T: 0
R: 1.85
C: 4.5
C: 3.02
C: 2.99
C: 3.06
C: 0.75
C: 0.70
T: 2.24
R: 0
T: 0.85
R: 0
T: 2.85
R: 0.01
C: 1.89C: 1.22
T: 0
R: 0.75
T: 0.85
R: 0
T: 1.67
R: 0
T: 1.45
R: 0.40
T: 0
R: 1.14
T: 0.46
R: 0.84
T: 2.95
R: 0
T: 2.37
R: 0
T: 1.78
R: 0
T: 3.64
R: 0
T: 0
R: 2.94
C: 2.47
T: 0
R: 0.98
CHASSIS
EP1
C73
0.1
C74
470 P
C75
470 P
R51
560 k
12
345
FI3
CFWM450G
R52
1.5 k
R53
150 k
2nd-Lo (21.25 MHz)
R1
820
C1
0.001
Q1
2SC4215 O
FI2
FL-297
C2
0.047
C79
10
R3
1 k
C47
22 P
R2
82 k
C101
1 P
EP2 MMZ1608D121B
C28
470 P
R6
4.7 k
C35
0.001
C3
0.047
R303
47 k
R304
270
C212
0.001
R310
330 k
L209
0.1 µH
R19
330
L1
2.2 µH
C46
12 P
R4
560
C36
8 P
C219
5 P
C13
47 P
L211
27 nH
Q2
3SK284
R7
47
C5
470 P
C6
470 P
C65
470 P
R25
33 k
L4
12 nH
12
FI1
NSVS647
D102
MA2S077
L3
18 nH
C32
6P
R16
33
Q3
2SC4226 R25
C7
22 P
R+3
1st LO
C8
6 P
C12
8 P
C11
0.75 P
C9
1.5 P
C10
10 P
L206
18 nH
L6
17 nH
L5
17 nH
D101
MA2S077
C209
6P
C210
7 P
C30
7 P
C44
27 P
L10
22 nH
D7
MA2S077
C31
7 P
RF TEST PORT
1
2
J1
C72
470 P
L205
68 nH
L23
15 nH
R209
220
R+3
C202
22 P
C207
8 P
C208
9 P
L204
8.2 nH
C206
0.001
R207
1 k
C205
0.001
Q202
XRF9482
R205
10 k
R206
10 k
L203
39 nH
R301
8.2 k
C21
470 P
C26
470 P
C201
470 P
Q8
2SC4228 R44
L202
33 nH
L201
22 nH
W202
Q201
2SC3356 R24
W201
C203
22 P
R213
220
R86
68
L21
22 nH
C204
6 P
T+3
C23
7 P
R202
22 k
D2
MA77
C70
470 P
D1
MA77
R12
1 k
R208
1 k
R37
22 k
C102
2 P
C88
10
C16
470 P
R305
3.9 k
C62
0.033
R45
8.2 k
C68
0.68
R306
8.2 k
R10
8.2 k
C17
0.033
C61
5 P
R88
4.7 k
R313
10
R302
10 k
VCC1
1
IN1
2
ENB
3
CLK
4
DATA
5
T1
6
LOK
7
CP1
8
FI1
9
FO1
10
FO2
11
FI2
12
CP2
13
GND2
14
XO
15
XI
16
XB
17
VCC2
18
IN2
19
GND1
20
IC1
µPD3140GS
R27
100 k
R55
15 k
R56
15 k
R59
15 K
C76
440 P
IC2
TA31136FN
C77
22 P
C78
68 P
R58
4.7 k
R54
10 k
X2
CDBCA450CX24
C81
0.047
C83
1
R61
10 k
C67
0.1
R57
2.2 k
C82
0.1
R60
100 k
C80
0.22
C48
22 P
R50
47 k
C20
470 P
C64
0.22
R30
33 k
C85
4.7
R29
47
C42
10 P
C63
10 P
Q12
2SC5006
X1
CR-669
C43
18 P
C215
470 P
R31
33 k
Q7
2SC5108 Y
C53
1.5 P
R33
8.2 k
L12
10 µH
C55
470 P
L11
10 µH
D5
1SV284
D4
1SV284
C56
0.5 P
L14
33 nH
C51
12 P
C50
12 P
L13
27 nH
R35
47 k
R36
220
C54
3.5 P
R34
680
C52
2 P
C57
2 P
Q6
2SC5108 Y
L15
82 nH
D103
MA2S728
L208
10 µH
C216
1.5 P
C69
0.001
L210
33 nH
W5
C218
470 P
R312
82 k
Q203
2SC5108 Y
R311
470
C217
6 P
R62
18
Q14
2SA1586 GR
R93
10
C84
470 P
C60
22
D8
1SS355
D9
1SS355
R64
56
Q13
2SC4081 S
12
34
56
78
910
11 12
13 14
to MAIN unit J4
J2
C95
470 P
R83
10 k
L25
4.7 µH
MOD
T+3
PSC
R+3
BATT
VOL
C91
0.047
R75
10 k
Q16
2SC4081 S
C96
470 P
C92
0.01
R73
680 k
C93
0.01
AF
STB
DATA
CK
SENS
SQL
SHIFT
C90
0.01
R68
390 k
R71
10 k
Q15
2SC4081 S
R69
3.9 k
C89
0.0068
R66
12 k
R67
680 k
R74
390 k
R76
3.9 k
R70
27 k
R72
8.2 k
C86
0.22
R65
3.3 k
C87
0.1
FILIN
FILOUT
BIAS
IFIN
VDD
MIXOUT
OSCOUT
OSCIN
AFOUT QUADIN IFOUT SOUT NDET NOUT VSS MIXIN
9
10 11 12 13 14 15 16
8 7 6 5 4 3 2 1
345678
T: TX
R: RX
C: COMMON