Icom IC-756PROII Service Manual - page 103
MKR
1LOB
14VB
1LOA
14VL
8VL
BLBV
14VL
R8V
BLAV
T/R2IF
8VL
14VL
R8V
S2LO
S3LO
BLAV
BLBV
8VL
14VL
R8V
T8V
MKR
T8V
8VS
BLAV
BLBV
8VS
SCPL
SATV
T8V
8VL
14VL
R8V
T8V
W362
W361
POFF
PRE1
PRE2
SCPL
BLAV
ALC
T8V
8VL
R8V
AGC
14VL
–5V
5VL
BLBV
SATV
AGC
T8V
8VL
PRE1
PRE2
14VL
POFF
BPFI
BPFI
0.61
µ
H
L153
10p
C159
TRVI
BSTB
MCK
MDAT
SCPL
BLAV
ALC
T8V
8VL
R8V
AGC
14VL
–5V
5VL
SATV
BLBV
POFF
PRE1
PRE2
BSTB
MCK
MDAT
BSTB
MCK
MDAT
RANS
5VL
14VL
8VL
R8V
TRVI
POFF
5VL
T8V
TRVI
R8V
14VL
14VL
ATT1
ATT2
ATT1
ATT2
5VL
B0
14VL
B5
B4
J203
J202
J201
BPFI
BPFO
B1
B2
B3
B1
B2
B3
B5
B4
B3
B2
B1
MMBV3700LT1
D171
0.1
C904
MA77
D411
BPF BOARD
unit J651
from PLL
unit J851
from PLL
unit J351
from PLL
unit J101
to MAIN-A
unit J81
from PLL
unit J801
from PLL
unit J901
from PLL
1k
R744
R708 1k
0.1
C706
8VL
BLBV
BLAV
8VL
R8V
LR-395
L492
C620 56p
C619 39p
C520 56p
C519 39p
560
R514
BLAV
BLBV
8VS
1SV263
D801
0.0047
C805
22k
R723
R722 1.8k
C724 0.0047
ALC
8VL
14VL
R8V
T8V
AGC
AGC
T8V
8VL
14VL
PRE2
PRE1
POFF
W443
ATT1
ATT2
RANS
PR1S
PR2S
unit J811
from MAIN-A
0.0047
C2001-2010
C2009
C2010
C2005
C2006
C2007
C2008
C2004
C2003
C2002
C2001
15
R152
unit J1
from PA
0.1
C131
68nH
L121
unit J2
from CTRL
0.1
C705
2SC4673
Q561
2SC4673
Q661
NJM4558M
IC871a
4
8
1k
R533
µ
PC2708T
IC961
0.1
C451
330
µ
H
L413
330
R411
470
C446
10k
R933
0.1
C141
330
µ
H
L171
0.0047
C772
RF-A UNIT
S3L0
J841
S2L0
J831
2L0
T/R2IF
J901
P741
W742
W741
J741
J711
1L0A
J561
1L0B
J661
MKR
J481
L535 10
µ
H
100p
C841
1.8
µ
H
L841
SFECV13.35MAS
FI843
SFECV13.35MAS
FI841
7p
C840
47
R841
10
µ
H
L842
0.0047
C844
100k
R845
0.001
C845
0.0047
C846
R848 1k
0.1
C848
CFJ455K8
FI842
O
I
R847 220
R846 220
0.1
C847
MIXIN
GND
N-REC
N-DET
RSSI
IFOUT
QUAD
AFOUT
FILIN
FILOUT
DEC
IFIN
VCC
MIXOUT
OSCOUT
OSCIN
TA31136FN
IC841
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
470k
R861
2.2M
R862
RV-108
R863
150k
R864
0.1
C872
0.1
C873
–
+
+
–
2
3
1
MA2S111
D861
2.2k
R865
1M
R866
10
C862
0.001
C863
RV-109
R872
15k
R871
100k
R873
NJM4558M
IC871b
82k
R875
390k
R874
5
6
7
L873 100
µ
H
L872 100
µ
H
L871 100
µ
H
1k
R876
CP871
RB706F-40
D871
0.0047
C874
0.0047
C834
47
R835
2SK882
Q831
100
R834
0.0047
C835
7p
C833
LS-484B
L833
330
R831
15
R832
330
R833
LR-358
L832
HSB88WS
D831
330
R821
330
R819
15
R820
LR-358
L831
47
R818
0.0047
C823
15p
C818
LS-484B
L813
2SK882
Q812
0.001
C820
150
R815
680
R814
2p
C819
0.0047
C816
47
R813
15p
C815
LS-484B
L812
2SK882
Q811
0.001
C814
150
R812
4.7k
R811
10p
C813
1k
R808
1k
R807
2.7
µ
H
L802
10k
R806
0.047
C806
1k
R804
0.0047
C802
0.0047
C803
10k
R803
2SC4081
Q801
1k
R751
0.0047
C752
0.001
C751
4.7
R758
0.68
µ
H
L755
150
R753
1k
R752
0.001
C753
7p
C754
0.1
C763
2.2k
R761
NTCCM16083NH
R762
2SK882
Q751
100
R755
10p
C755
0.0047
C756
LS-484B
L752
56
R760
0.0047
C758
MA77
D751
2.2k
R756
0.0047
C757
2.2k
R759
MA77
D534
XP4311
Q722
4
5
3
6
1
2
MA77
D701
100
R702
330
R707
330
R705
15
R706
0.0047
C704
0.0047
C702
100k
R704
2SK882
Q701
15p
C703
1k
R701
0.0047
C701
LS-484B
L701
MA77
D702
0.1
C745
330
µ
H
L746
470
R746
1SV308
D743
1SV308
D742
330
µ
H
L745
0.1
C743
0.1
C746
15
R742
330
R741
330
R743
LR-395
L742
C742 470p
HSB88WS
D741
0.1
C731
LR-358
L741
1k
R736
680
R735
680
R734
6.8
R733
MA77
D722
0.1
C744
W941
0.1
C943
820
R944
270
R943
270
R941
18
R942
0.0047
C941
LR-358
L942
HSB88WS
D941
LS-484B
L721
LR-395
L941
LS-484B
L722
0.0047
C728
12p
C727
47
R730
R729 2.2k
3SK131
Q721
0.0047
C726
68
R728
1.8k
R725
0.0047
C732
10k
R727
0.001
C722
47
R726
10
R724
100p
C725
10p
C723
0.1
C781
1k
R781
MA77
D721
0.0047
C721
1k
R721
4p
C716
LS-540
L713
FL-315A
FI711b
LS-540
L712
3p
C715
FL-315A
FI711a
4p
C714
0.0047
C713
1k
R720
LS-540
L711
MA77
D711
5p
C710
MA77
D712
0.0047
C712
270
R713
270
R711
18
R712
0.0047
C711
220
R638
LR-358
L653
0.1
C557
1mH
L534
0.1
C556
10
C553
0.1
C657
1mH
L634
10
C563
0.1
C656
10
µ
H
L663
120
R665
10
µ
H
L563
120
R565
10
µ
H
L568
68
R561
0.22
µ
H
L561
39p
C561
33k
R563
0.33
µ
H
L562
0.1
C563
0.001
C564
W562
68nH
L567
68nH
L564
68nH
L565
10p
C566
7p
C568
24p
C565
33p
C567
27p
C569
1k
R567
MA77
D562
MA77
D561
1k
R578
0.1
C570
0.0047
C771
180
R771
820
R774
180
R773
33
R772
LR-358
L566
R518 100
R517 100
10
µ
H
L530
10k
R535
10
C540
2SC4081
Q531
0.1
C539
10
µ
H
L532
0.1
C538
1.5k
R532
2.2k
R534
MA2S111
D536
100
R552
27p
C552
0.1
C551
0.15
µ
H
L552
10p
C554
TZVY2Z060A110
C555
2SK2171
Q551
47
R551
10
µ
H
L551
0.0047
C536
0.0047
C537
10
µ
H
L533
0.0047
C535
4
5
3
1
2
1SV265
D532
1SV263
D533
470p
C534
10
µ
H
L531
0.0047
C533
470p
C532
0.0047
C542
2.2k
R537
0.0047
C541
2.2k
R539
MA77
D535
4
5
3
1
2
1SV265
D531
0.1
C531
220
R531
10
µ
H
L514
8p
C516
8p
C517
LS-541
L513
EVM-2W
R515
560
R512
0.1
C512
0.1
C513
2SK1740
Q514
2SK1740
Q512
2SK1740
Q511
2SK1740
Q513
0.1
C515
0.1
C514
LR-362
L511
0.1
C511
EVM-2W
R516
100
µ
H
L512
560
R513
560
R511
22p
C508
2SK2171
Q502
2SK2171
Q501
9p
C507
330
µ
H
L504
47
R501
0.1
C506
15p
C504
C505 56p
C501 33p
C503 39p
0.25-1.9-13TL
L503
47p
C502
107nH
L502
50nH
L501
120p
C509
0.47
µ
H
L505
0.22
µ
H
L661
68
R661
39p
C661
33k
R663
W662
0.1
C663
0.33
µ
H
L662
0.001
C664
68nH
L667
24p
C665
33p
C667
10p
C666
68nH
L664
7p
C668
68nH
L665
27p
C669
LR-358
L666
MA2S111
D636
10
C640
10k
R635
2SC4081
Q631
0.1
C639
10
µ
H
L632
0.1
C638
1.5k
R632
2.2k
R634
1k
R633
100
R652
27p
C652
0.15
µ
H
L652
0.1
C651
10p
C654
TZVY2Z060A110
C655
2SK2171
Q651
10
µ
H
L651
47
R651
0.0047
C637
0.0047
C636
10
µ
H
L633
0.0047
C635
4
5
3
1
2
1SV265
D632
1SV263
D633
470p
C634
MA77
D635
10
µ
H
L631
470p
C632
0.0047
C633
4
5
3
1
2
1SV265
D631
220
R631
0.1
C631
10
µ
H
L614
LS-541
L613
8p
C617
8p
C616
560
R613
560
R611
EVM-2W
R616
EVM-2W
R615
100
µ
H
L612
0.1
C611
LR-362
L611
560
R614
0.1
C615
0.1
C614
R618 100
R617 100
2SK1740
Q614
2SK1740
Q612
2SK1740
Q611
2SK1740
Q613
560
R612
0.1
C613
0.1
C612
0.47
µ
H
L605
9p
C607
2SK2171
Q602
2SK2171
Q601
330
µ
H
L604
47
R601
0.1
C606
C605 56p
15p
C604
0.25-1.9-13TL
L603
C603 39p
C601 33p
47p
C602
107nH
L602
120p
C609
50nH
L601
22p
C608
100
R491
47k
R481
2.2k
R482
MA77
D481
220p
C481
LR-395
L491
0.1
C491
LR-408
L444
330
µ
H
L471
560
R471
MA77
D444
MA77
D443
MA77
D432
MA77
D421
56p
C760
56p
C761
7p
C759
0.15
µ
H
L753
0.15
µ
H
L754
100
R966
56p
C961
68p
C962
82nH
L961
0.15
µ
H
L962
100p
C963
18p
C964
82p
C965
0.1
C966
22
µ
H
L963
10
R961
0.1
C967
1
6
4
2
3
5
0.1
C968
617DB-1327
L771
617DB-1327
L772
5p
C774
HSB88WS
D771
18p
C775
39
R964
MA77
D772
100
R965
0.1
C969
150
R962
150
R963
330
µ
H
L412
560
R412
100
µ
H
L452
XP4311
Q452
1
2
6
3
4
5
0.1
C455
39
R455
150
R456
150
R454
0.1
C457
0.1
C456
100
R453
0.1
C454
680
R452
0.1
C453
1
2
3
4
µ
PC1658G
IC451
GND
SETE
OUT
VCC
BYPS
BYPS
IN
SETC
8
7
6
5
0.1
C452
330
µ
H
L453
47
R451
47
R444
0.1
C445
4.7
µ
H
L443
150
µ
H
L445
XP4311
Q445
1
2
6
3
4
5
0.1
C443
4.7
µ
H
L442
2SK2171
Q442
2SK2171
Q441
22
R442
0.1
C442
LR-395
L441
0.1
C441
0.47
C447
47
R441
MA77
D442
MA77
D441
0.1
C432
47
R432
47
R431
150
µ
H
L431
0.1
C431
MA77
D431
0.1
C411
MA77
D342
0.27
µ
H
L343
B10W
100
R341
68p
C343
0.1
C348
0.22
µ
H
L342
0.1
C347
56p
C341
0.27
µ
H
L341
MMBV3700LT1
D341
56p
C345
MA77
D362
0.14
µ
H
L365
B10
47p
C370
95nH
L363
100
R361
47p
C366
0.1
C376
0.1
C363
0.14
µ
H
L361
MMBV3700LT1
D361
MA77
D322
15p
C335
0.33
µ
H
L325
12p
C333
B9
22p
C330
22p
C332
0.68
µ
H
L323
100
R321
7p
C329
0.68
µ
H
L324
22p
C326
22p
C328
0.1
C336
22p
C324
12p
C325
0.68
µ
H
L322
0.1
C323
15p
C322
100p
C321
0.33
µ
H
L321
MMBV3700LT1
D321
100p
C334
MA77
D302
10p
C307
18p
C315
0.56
µ
H
L305
18p
C313
B8
33p
C310
10p
C311
33p
C312
0.82
µ
H
L303
100
R301
0.82
µ
H
L304
33p
C306
47p
C308
0.1
C316
33p
C304
18p
C305
0.82
µ
H
L302
0.1
C303
18p
C302
120p
C301
0.56
µ
H
L301
120p
C314
MMBV3700LT1
D301
POFF
PRE1
PRE2
SCPL
BLAV
ALC
T8V
8VL
R8V
AGC
14VL
–5V
5VL
SATV
BLBV
MA77
D2082
33p
C2087
220p
C2095
1.2
µ
H
L2085
22p
C2093
39p
C2090
33p
C2091
100p
C2092
2.7
µ
H
L2083
100
R2081
22p
C2089
2.7
µ
H
L2084
39p
C2086
82p
C2088
0.1
C2096
100p
C2084
22p
C2085
2.7
µ
H
L2082
0.1
C2083
220p
C2082
220p
C2081
1.2
µ
H
L2081
220p
C2094
MMBV3700LT1
D2081
MA77
D2062
27p
C2067
150p
C2075
2.2
µ
H
L2065
27p
C2073
120p
C2070
27p
C2071
150p
C2072
3.3
µ
H
L2063
100
R2061
10p
C2069
3.3
µ
H
L2064
120p
C2066
150p
C2068
0.1
C2076
150p
C2064
27p
C2065
3.3
µ
H
L2062
0.1
C2063
150p
C2062
330p
C2061
2.2
µ
H
L2061
MMBV3700LT1
D2061
330p
C2074
MA77
D2042
15p
C2047
390p
C2055
2.2
µ
H
L2045
33p
C2053
82p
C2050
15p
C2051
180p
C2052
6.8
µ
H
L2043
100
R2041
56p
C2049
6.8
µ
H
L2044
82p
C2046
120p
C2048
0.1
C2056
180p
C2044
33p
C2045
6.8
µ
H
L2042
0.1
C2043
390p
C2042
560p
C2041
2.2
µ
H
L2041
MMBV3700LT1
D2041
560p
C2054
MA77
D2022
56p
C2027
330p
C2035
4.7
µ
H
L2025
39p
C2033
330p
C2030
56p
C2031
330p
C2032
5.6
µ
H
L2023
100
R2021
47p
C2029
5.6
µ
H
L2024
330p
C2026
330p
C2028
0.1
C2036
330p
C2024
39p
C2025
5.6
µ
H
L2022
0.1
C2023
330p
C2022
560p
C2021
4.7
µ
H
L2021
MMBV3700LT1
D2021
560p
C2034
MA77
D2002
27p
C2007
0.001
C2015
3.9
µ
H
L2005
120p
C2013
180p
C2010
27p
C2011
330p
C2012
12
µ
H
L2003
100
R2001
47p
C2009
12
µ
H
L2004
180p
C2006
330p
C2008
0.1
C2016
330p
C2004
120p
C2005
12
µ
H
L2002
0.1
C2003
0.001
C2002
0.001
C2001
3.9
µ
H
L2001
0.001
C2014
MMBV3700LT1
D2001
6.8
µ
H
L182
6.8
µ
H
L181
0.0022
C186
0.0012
C185
0.0027
C184
0.0022
C183
0.1
C182
100
R183
0.1
C181
68
R182
100
R181
10
R913
MA77
D282
15p
C287
47p
C295
0.68
µ
H
L285
18p
C293
B7
22p
C290
15p
C291
47p
C292
1.5
µ
H
L283
100
R281
8p
C289
1.5
µ
H
L284
22p
C286
47p
C288
0.1
C296
47p
C284
18p
C285
1.5
µ
H
L282
0.1
C283
47p
C282
180p
C281
0.68
µ
H
L281
180p
C294
MMBV3700LT1
D281
MA77
D262
100
R271
B6
33p
C267
1
µ
H
L265
68p
C275
0.1
C276
220p
C274
1.8
µ
H
L264
47p
C273
47p
C272
33p
C271
33p
C270
1.8
µ
H
L263
82p
C268
33p
C266
47p
C265
47p
C264
1.8
µ
H
L262
0.1
C263
68p
C262
220p
C261
1
µ
H
L261
MMBV3700LT1
D261
B10
B10W
B9
B8
B7
R931 10
R930 10
R929 10
R928 10
R927 10
R925 10k
R924 10k
R923 10k
R922 10k
R921 10k
0.1
C905
16
BU4094BCFV
IC905
6
QS
QS
4
Q8
Q7
Q2
Q6
Q1
Q3
5
Q5
15
Q4
OE
CLK
STR
D
3
2
1
7
14
13
12
11
9
10
8
DAN222
D905
DAN222
D904
0.1
C902
GND
O8
O7
O6
O5
O4
O3
O2
O1
IN1
IN2
IN3
IN4
IN5
IN6
IN7
VS
1
2
3
4
5
6
8
7
9
10
12
13
14
15
16
17
18
IN8
11
TD62783AF
IC904
16
BU4094BCFV
IC902
6
QS
QS
4
Q8
Q7
Q2
Q6
Q1
Q3
5
Q5
15
Q4
OE
CLK
STR
D
3
2
1
7
14
13
12
B8WS
B8S
B9S
B10WS
B10S
AT2S
AT1S
11
9
10
8
B6
B5
B4
B3
B2
B1
R914 10
R915 10
R916 10
R917 10
R918 10
R919 10
R911 10k
R910 10k
R909 10k
R908 10k
R907 10k
R906 10k
R905 10k
0.1
C903
DAN222
D903
0.1
C901
GND
O8
O7
O6
O5
O4
O3
O2
O1
IN1
IN2
IN3
IN4
IN5
IN6
IN7
VS
1
2
3
4
5
6
8
7
9
10
12
13
14
15
16
17
18
IN8
11
TD62783AF
IC903
16
BU4094BCF
IC901
6
QS
QS
4
Q8
Q7
Q2
Q6
Q1
Q3
5
Q5
15
Q4
OE
CLK
STR
D
3
2
1
7
14
13
B2S
B0S
B1S
B3S
B4S
B5WS
12
11
9
10
8
BSTB
MCK
MDAT
SCPL
BLAV
BLBV
SATV
5VL
–5V
R8V
T8V
ALC
8VL
AGC
14VL
0.1
C956
10
C955
10
C953
0.1
C954
0.047
C875
0.1
C952
10
C951
L951 HF50ACC322513-B
0.0047
C970
CP951
CP952
CP953
CP954
CP955
CP956
CP957
CP958
CP959
CP960
CP961
CP962
CP971
CP963
CP964
CP965
CP966
CP967
CP968
CP969
CP970
CP972
BSTB
MCK
MDAT
GND
SCPL
BLAV
BLBV
SATV
TRVI
5V
–5V
R8V
T8V
ALC
8V
AGC
14V
14V
J951
PRE2
PRE1
POFF
5VL
T8V
TRVI
R8V
8VL
14VL
R934 10k
R902 4.7k
R901 4.7k
XP4311
Q904
4
5
3
6
1
2
XP4311
Q905
4
5
3
6
1
2
XP4311
Q903
4
5
3
6
1
2
UMH11N
Q902
4
5
3
6
1
2
DAN222
D902
UMH11N
Q901
4
5
3
6
1
2
DAN222
D901
UN9211
Q153
0.1
C158
10k
R156
47k
R159
180
R154
100k
R155
10k
R146
1k
R160
2SA1576
Q152
UMH11N
Q151
1
2
6
3
4
5
0.1
C133
10k
R133
UN9211
Q132
330
µ
H
L174
0.1
C174
5.6
µ
H
L173
0.0015
C173
4.7
µ
H
L172
0.1
C175
100k
R171
0.0033
C172
0.0033
C176
0.0027
C171
MMBV3700LT1
D141
MMBV3700LT1
D153
UN9211
Q101
UN9211
Q143
0.1
C151
330
R151
330
R153
0.1
C152
4
3
2
1
8
7
6
5
IN
GND
GND
GND
VCC
GND
GND
OUT
µ
PC1678G
IC151
4.7
R158
22
µ
H
L151
0.1
C153
0.1
C154
82p
C155
82p
C157
12p
C156
0.12
µ
H
L152
470
R161
10
R162
470
R163
J151
PAI
J101
330
R141
330
µ
H
L141
0.1
C142
100k
R142
0.1
C145
0.1
C143
2.2k
R143
MA77
D142
100k
R147
0.1
C144
UMH11N
Q141
1
2
6
3
4
5
10k
R144
2P-50-W1L301
R145
XVRT
UN9211
Q131
100k
R132
0.1
C132
330
µ
H
L132
330
R131
MMBV3700LT1
D181
MMBV3700LT1
D131
0.0047
C122
68
R124
150
R123
AHY103
RL122
0.0047
C101
0.0047
C121
DAN222
D103
AHY103
RL121
100
R122
47
R121
AHY103
RL101
0.1
C111
33p
C112
82p
C114
47p
C116
75p
C113
15p
C115
82nH
L111
0.12
µ
H
L112
RANT
J111
HRS-4160A
DS111
10k
R111
2P-50-W1L301
R112
RX
B5S
B7S
B6S
B7WS
PREAMP ON 13.2V
OTHER 0V
PREAMP ON 13.2V
OTHER 0V
Selected 12.0V
Unselected 0V
ATT 0.6dB 12.0V
ATT 12.18dB 0V
ATT 0.12dB 12.0V
ATT 6.18dB 0V
RX 0V
TX 1.7V
maker ON
scope activate
scope ATT 0dB
3.8V
1.4V
Scope ATT
0 dB
10 dB
20 dB
30 dB
A
B
0.2V
0.8V
1.4V
3.4V
3.7V
0V
0.8V
B
A
RX 12V
TX 0V
RX 2.8V
TX 2.4V
RX 0.7V
TX 0V
RX 0.9V
TX 0V
2.7V
11.2V
1.7V
11V
RX 11.3V
TX 11.2V
1.1V
3
8.1V
1
2
4
12.6V
RX 11.9V
TX 11.7V
RX 6.6V
TX 6.5V
D-WATCH
OFF
ON
left
center
right
BAL
2
1
3
4
0.4
4.7
0
4.8
0.4
4.7
0
4.8
4.7
4.7
4.8
4.8
4.7
0.4
4.8
0
MEASUREMENT CONDITIONS
DISPLAY FREQ. :14.10000MHz
MODE
MEASURE
:VOLTMETER
:OSCILLOSCOPE
:USB
11.3
Display frequency (MHz)
1.600000 ~ 1.999999
2.000000 ~ 2.999999
3.000000 ~ 3.999999
4.000000 ~ 5.999999
filter
Voltage(V)
B1
B2
B3
11.2
B4
11.2
6.000000 ~ 7.999999
B5
11.3
11.3
Display frequency (MHz)
0.003000 ~ 1.599999
8.000000 ~ 10.999999
11.000000 ~ 14.999999
15.000000 ~ 21.999999
filter
B0
B6
B7
B8
22.000000 ~ 29.999999
30.000000 ~ 49.999999
50.000000 ~ 54.000000
54.000001 ~ 60.000000
B9
B10W
B10
B10W
10-8 RF-A UNIT AND BPF BOARD
10 - 8