Icom ic-r20 Service Manual page 36

Aug. 2009
• RF UNIT
(TOP VIEW)
R441
Q543
R437
C687
R372
R529
C706
R347
C688
C98
to LOGIC UNIT J5
R61
21 B_DET
20
LD2
B_R3V
R58
+3S
GND
GND
B_NOISE
B_VCO2
B_RSSI
B_VCO3
+3V
B_VCO4
GND
PLLCK
PLLBSTB
PLLDATA
PLLDSTB
STR2
Q41
VP
HFC
GND
C896
B1C
PLLESTB
B2C
PLLCSTB
B3C
PLLASTB
D
RFO
CLK
A_DET
LD1
J1
A_R3V
EAR
GND
A_VCO1
A_NOISE
A_VCO2
40 A_RSSI
GND 1
R449
L106
C756
R427
R447 D133
D136 R537
D134
D131
R519
R445
FI7
R438
R426
C757 L102
C752
R503
C870
IC17
R518
C765 C766 R432
C882
R461 C762
D172
R381
R382
R384 C714
Q531
Q530
L99
R396
C715 R387
D111
C889
C686
Q527
D113
R46
D109
D112
Q526
R49
R50
R172
C99
R60
R530 C894
R414 R415
MP2
C93
IC2
R62 C202
D59
C75 R536
D61
D58
FI3
R520
C101 C103
R209
R55 C259 R35
R205
R54
C427
D165
16
C71
C749
IC16
FI1
C436
R467
C885 C920
C797
C703
R359 C699
Q525
R103
C916
C874
R355
X1
C876 C875
C878
R514
Q556
R516
C879
R512
C877
C677
FI4
IC10
C683
C435
L101
R499
R523 C886
R497
C746
C887
R423
IC18
C214
C902
R100
D157
D154
C903
D156
D155
C904
R110
C905
D36
R541
C808
D142
R475
R474
D153
L113
D158
D141
R473
D178 C815
C901
L112
D151
C809
Q548
D179
R472
R471
R469
R493
C913
C907 C58
C136 C59
D29
C908
L41
D34
C664
R220
C142 C141
R231
C153
C568
C665
C206
R325 C663
R6
The combination of top side and bottom side of this
W2
(Chassis earth)
W1
(Chassis earth)
W1 W2
ANT
C895
L12
(Chassis earth)
D13
C5 C49
L13
C45
C50
D3
R239
L127
C888
C857
C22
C855
C23
L126
L5
L39
R491
C847
Q551 C844
C846
C845
L122
C851
C264
C848
D159
C852
R13
C134
C849
C28
C853
C673
C860
R494
R496
C42
D75
L10
C43