Rf Unit - Icom IC-R3 Service Manual

12-5 RF UNIT

1.0 V 2.3 V
C2 D2 C10 L6
0.1 1SV308 0.1 56 H
ANT
D12
R7
1SV308
1 k
R8
L1
1 k D13
3.3 nH
C11
1SV308
0.001
f 1150 MHz L7 56 H
D909 1.8 v
1SV308
D1
R959
1SV252
R960 4.7 k
C963
4.7 k
1.5 P C3
0.1
C936 2 P
C932 2 P C934 1.5 P
C933 C935
C964
15 P 4 P
3 P
L914
L911 L912
8.2 nH 12 nH C977
6.8 nH
470 P
C944 470 P
6
C939 0.001 C941 0.001
4 1
5
3 C389
2
IC14 0.1
UPC2749TB
IC13 UPC2758T R961
C945 4.7 k
3 4
LO PS 470 P
2
5
GND VCC
1 6
IFO
RFI
R963 C946
1.2 k 0.001
f 1150 MHz
1.1 V
CONLO
D805
L806 8.2 nH L807 12 nH
1SV308
C813 C815
1 P 0.3 P
470—600 MHz: 3.0 V
C812 C814 C816
470—600 MHz: 1.9 V
3 P 5 P 3 P
D803 C801 C803
L802
C802
MA2S077 0.001 0.001
6.8 nH
15 P
R809 L801
2.2 k 4.7 nH
D801
R801
1SV286
100 k
D853
MA2S077
C818
180 P
C853 600—800 MHz: 3.0 V
C851
L852 4.7 nH 8 P
0.001
C852
600—800 MHz: 1.9 V
R859
10 P
2.2 k
R850
27 k
L851
D851
3.3 nH
1SV286 R851
100 k
D33
1SV308
D34
R101
W3
MA132WK
2.2 k
W2
R102
1 k
W1
C71
C59
0.001
0.001
30M
108M
GND
RFO
174M
65M
TRAC
GND
RFI
AGC
SIFOUT
1
2
IFIN
3
COMPLETE VIEW
R1 330
ATT
C81
C6 OFF: 0.1 V
C5
0.1
0.001 1: 1.9 V
0.001
2: 2.0 V
C9
3: 2.2 V
0.001
4: 2.4 V
R2 330
R3
680
R5
C82 C8 0.001 R4
C7
1 k
0.1 Q1 1 k D4 MA2S077
0.001
2SC4081
R6
NTCCM16084BH 472KC
R3V
R862
R864
47 k
1 k D5 C332 C333
MA2S077 0.01 0.0015
Q859 R861 10 k
CONVC
2SC4081 C335 C336
R225
D861 0.01 0.039
2.2 k
R865
MA2S111
D862
22 k
L85 L86
R962 1 k
MA2S111
3.9 H 3.9 H
C342
0.1
D911 C978 Q860
1SV308 0.1 R863
2SA1588
470
D6 C326
C327
D3 1SV308 L81 0.27 H L82 0.33 H MA2S077 220 P 180 P
R965
C321 33 P C322 12 P R222 C329
1 k
2.2 k 0.0015
L83
0.47 H
C325 C331
C323 C324
D912
C4 0.1 100 P 0.1
82 P 150 P
MA2S077
470—600 MHz: 2.9 V 470—600 MHz: 0.7 V
R804
220 k
C808 C811
L804
0.001 10 nH 0.001
Q801
3SK293
L803 R806
C809
L805
0.1 H 470
15 P
4.7 nH
C806
D802
0.001 R807 R808
1SV286
R800
22 100 k
27 k
R802
47 k
C804 R805 C807 C810
C817 C805
0.001 100 0.001 0.001
0.001 0.001
600—800 MHz: 2.9 V
L854 5.6 nH C861 0.001 D854 1SV308
R854 Q851
220 k
3SK293
C858
L853
0.001 C859
0.1 H
L855
10 P
600—800 MHz: 10.7 V
3.3 nH
R858 D852
C856
R857 R860
100 k 1SV286
0.001
22 2.2 k
R852
47 k
C860
C855 R855 C857
C854
0.001
0.001 100 0.001
0.001
L8 L9
C43
C395 C396
18 nH 22 nH
47 P
47 P 39 P
C41 L10
C40
C42
2.5 P 47 nH
12 P
6 P
C74
0.001 R110
C57
100 k
100 P
L15
800—1150 MHz: 0.8 V 5.6nH
C56 3 P
R109
2.2 K
C47 C49 L13 L14
C45 C53
3 P 3 P 3.9 nH 3.9 nH
3 P 0.001
800—1150 MHz: 3.0 V
Q8
C54 800—1150 MHz: 0.1 V
C46
C48
2SC5195
2 P
6 P
6 P
C51
L12 C52
L11
1 P
10 nH 1 P
15 nH
R111
C62 C55
15
0.001 100 P
Q4
DTA144EE
L89 3.3 H L90 3.3 H
R227 1 k
C372
C371
0.001
0.1
D7
C346
C344
MA2S077
680 P
C345 C347
330 P
0.001 0.0022
C349
R229
0.1
C334
L87 L88 D8 L91 R231
68 k
0.01
0.47 H 0.68 H MA2S077 100 H 2.2 k
C350
C337 C338
0.1
R230 D10 1SV308
82 P 27 P
3.3 k
C348
R226
0.1
f<30 MHz: 3.0 V
2.2 k Q3
C339 C340 C341
2SC4215 O
150 P 330 P 180 P f<30 MHz: 1.0 V
f<30 MHz: 0.3 V
C351
C328 R228
0.1
0.001 D9 MA2S077 100
C330
Q6 XP1114
R224
R223
0.01
3.3 k B2_3V 4 3
2.2 k B2C
L84
2
0.47 H
B3_3V 5 1 B3C
C943 0.001 C947
D913
0.001
MA133
D804
1SV308
R810
2.2 k
AGC
D35
1SV308
RFO
D37
1SV308
R116 C44
R115 68 0.01
56 k
R118
2.2 k
L41
C143
33 nH
0.001 C142 7 P
R114
6.8 k
R119
225—330 MHz: 2.6 V
39
225—330 MHz: 1.2 V
225—330 MHz: 0.4 V
Q9
2SC5231
C141 R117
0.01 120
C58 R112 R108
0.001 220 220
R107 D36
C400
22 1SV308
2 P
R113
4.7 k
D51
C366 MA6S718
0.001
RFO
30M
108M
174M
65M
TRAC
AGC
RFI
SIFOUT
IFIN
R3V
Q866 XP1114
174M 4 3 174MC
C982
2
0.001
ATT 108M 5 1 108MC
C983
0.001
330M 330MC
CONVC
Q867
+3V
DTA123JE
B1C
C984
C993
0.001
0.001
Q865
R877
Q5 DTA123JE
2SA1588
470
HFC CONVC
R878
C985
C373
47 k
0.001
0.001
Q869
DTA144EE
SHIFTC
PSTB
B2C
C374
0.001
B3C
C375
0.001
CONLO
R941
82
R947 47 k
C960
R944
470 P
C952 220
R942 470 P
15
L922
C953
10 nH IC15 TB31242FN
1.5 P
R943 1 CP 10
FIN
68 k 2 BS 9
GND
LD 8
3 C959
CLK
4 VCC 7
C950 DATA 0.001
5 XIN 6
C951 0.001 STB
0.001
Q874
R950 +
2SC5195
C954 C955
56
10 470 P
D11 1SV308 L57 27 nH
L58 39 nH L59 33 nH
C16 1 P
C14 2 P
C12 C13 C15 C17
D21 1SV308
1 P 15 P 18 P 10 P
330—470 MHz: 0.8 V
R11
C28
Q7
150
0.001
UPA805T
C19 C21 L3 L4 L5 L39 4 3
18 P 18 P 12 nH 18 nH 18 nH 18 nH
5 2
R18
120
1
C23 6
C27
C25
3.5 P
C20 3 P
1 P
330—470 MHz: 3.0 V
18 P
R241 R12
2.2 k L2 4.7 k
C22 C26 R14
C24
39 nH
4 P 6 P 6.8 k
9 P
C30
R13
330—470 MHz: 1.6 V 0.001
15 k
330—470 MHz: 2.7 V
C31
0.001
Q872
2SK880
R875
15 k
R876
2.7 k
C174 C175
0.001 0.001
TVIF5
+3V
D201 MA2S1
RXC
C200 R200
15 10 k
R937 330
RFO
R938 15 k
R939 L909
B2C
47 k 0.12 H
Q857
2SC4403
B3C
C305
1.5 P C900
0.01
CONLO L908
C927
PGSTB 0.12 H
120 P
PDA
TV Mode: 0.9 V
Q875
R948
UN9214
10 k
R901 4.7 k
D871 MA2S111
D901
PCK IC10 MA2S
UPC2757T
R946 6.8 k
1 6
RFI IFO
2 VCC 5
GND
R945 +
C958
C957 3 PS 4
150 LO
0.1
0.1
R3V
C302
C956
180 P
15
RFI
D71
MA2S077
330—470 MHz: 1.9 V
C401
0.001
TRAC
C39
R16
0.001
R15 47 k
D72
47 k
MA2S077
C33 C35 C36 C37
0.001 1 P 0.001 0.001
R71
D24
2.2 k
L61 MA2S077
D23
22 nH
1SV286
R17
2.2 k
D22 L60
1SV286 15 nH
C32
C38
0.001
0.001
SFIOUT
IFIN
330M
C153
IC1 UPC2757T
0.1
1 IFO 6
RFI
2 VCC 5
GND
3 PS 4
LO
C152
0.001
RFO
R256
R255 15 R257
330 82
RFI
SFIOUT
IFIN
C
0
R
10
C7
0.0