Rf-B Unit - Icom IC-R3 Service Manual

12-2 RF-B UNIT

RFI
1.9 V
D403
C401
MA2S077
0.01
RFI
L401
0.56 H
R409
2.2 k
30–65 MHz
1.9 V
D503
C501
MA2S077
0.001
RFI
L501
56 nH
R509
2.2 k
65–108 MHz
1.9 V
D603
C601
MA2S077
0.001
RFI
L601
33 nH
R609
2.2 k
108–174 MHz
1.9 V
D703
C701
MA2S077
0.001
RFI
L701
15 nH
R709
2.2 k
174–225 MHz
R404
220 k
3.0 V
Q401
L402 C403
3SK293
0.56 H 0.01
C402
0.01
R402
68 k
C404
D401
0.01
1SV288
R401
100 k
R403
47 k
R504
220 k
3.0 V
Q501
L502 C503
3SK293
0.15 H 0.001
C502
0.001
R502
68 k
C504
D501
0.001
1SV288 R501
100 k R503
47 k
R604
220 k
3.0 V
Q601
L602 C603
3SK293
0.1 H 10 P
C602
0.001
R602
68 k
C604
D601
0.001
R601
1SV286
100 k
R603
47 k
R704
220 k
3.0 V
Q701
L702 C703
3SK293
47 nH 0.001
C702
0.001
R702
68 k
C704
D701 0.001
R701
1SV286
R703
100 k
47 k
2.4 V
C408
0.01
L403
1 H
0.6 V
R408
C406
R407
100 k
0.01
100
C405 R405
0.01 100
C407
0.01
2.4 V
C508
0.001
L503
1 H
0.6 V
R508
C506
100 k
R507
0.001
100
C505 R505
0.001 100
C507
0.001
2.4 V
R611
C608
10
3 P
L603
R606
1 H
270
0.6 V
R608
C606
R607 100 k
0.001
100
C605 R605
0.001 100
C607
0.001
2.4 V
R711 C708
22
0.001
L703
1 H
0.6 V
R708
C706
100 k
0.001
R707
100
C705 R705
0.001 100
C707
0.001
12 - 2
L404
C411 D404
C409 0.56 H
0.01 MA2S077
0.01
R410
D402
L405
2.2 k
1SV288
0.56 H
C410
0.01
L504
C511 D504
C509 0.15 H
0.001 MA2S077
0.001
R510
D502
L505
2.2 k
1SV288
56 nH
C510
0.001
L604
C611 D604
C609 82 nH
0.001 MA2S077
0.001
R610
D602
L605
2.2 k
1SV286
33 nH
C610
0.001
L704
C711 D704
47 nH
C709
0.001 MA2S077
0.001
D702
R710
L705
1SV286 2.2 k
15 nH
C710
0.001
J3
To RF unit
J4
To RF unit
RFI
AGC
RFO
30M
TRAC
AGC
RFO
65M
TRAC
AGC
RFO
108M
TRAC
AGC
RFO
174M
TRAC
TRAC
1
2
RFI
3
AGC
4
30M
1
108M
2
3
RFO
4
174M
5
65M
6