![background image](http://html.mh-extra.com/html/icom/ic-706mkiig/ic-706mkiig_service-manual_612196070.webp)
MAIN UNIT (4)
AMS8
AMS
H5V
HV
14V
WFM8
R8V
T8V
FMS8
8V
5V
L1
L2
L3
L4
L5
L6
L7
L8
L9
B0
B7
B7W
BHF
IDS
1F15
2F23
2FB0
2FTH
OP1
OP2
RXS
ATTS
PR1S
PR2S
PR3S
PR4S
TB1V
TB2V
TB3V
TB4V
RFGV
AGFS
AFGC
AFMS
AFS1
AFS2
SQL
SQLS
NBS
CTCV
NSQL
AVXL
VOXL
COMS
MIGV
MINH
MODS
DRIV
POCV
KDS8
TIFS
ETON
TONE
ALCL
FORL
REFL
SML
LRXD
LTXD
MCK
MDT
IFST
ICK
DDT
DINT
DSPS
IMST
CON0
CON1
CON2
DRES
PBST
PCE
PCK
PDST
PDT
MLLV
UL
BDT
KEY
STRT
CIV
CIVE
SPCH
BEEP
DASH
DOT
U/D
BANV
SPS
POWS
PWK
SEND
SDSS
PTTP
0VDV
D95S
SNDSR
GND
14V
8V
5V
R8V
T8V
HV
H5V
47k
4081
R783
47k
SML
7
6
5
-
+
R779
4.7k
R782
680
C776
0.1
Q774
2SC4081
R778
10k
Q773
UMC1N
C775
10
4
5
3
2
1
AGFS
R777
100
Q772
UMC1N
C774
0.47
AFMS
1
2
3
5
4
R776
100
C773
0.0047
R775
1M
D772
MA2S111
C764
0.01
C763
0.0047
R764
15k
C762
0.0022
R763
100k
R762
68k
R761
1k
D761
1SS375
Q771
2SC4081
R771
4.7k
C772
100p
C761
0.0047
C771
150p
D771
1SS375
R773
6.8k
R772
1k
RFGV
C752
0.1
R753
220
Q751
2SC4081
R752
47k
C751
220p
L741
LS-516
C742
47p
C743
0.1
R742
47
Q741
2SK882
R741
R
V
-148
(4.7kB)
L731
LS-516
C734
47p
C735
0.1
R736
47
R735
470
C733
0.1
R733
470
C732
0.0047
Q731
3SK126
R732
18k
C731
0.0047
C791
0.0047
R723
680
R721
100
R722
5.6k
R730
12k
C722
0.1
Q721
2SC4081
C721
22p
R734
47
4
5
3
1
2
UNF8
C792
0.0047
D791
MA862
R791
2.2k
R792
10k
IFOUT
VCC
OSCIN
BASE
COLECT
GND
BASE
BASE
IC841
TA4101F
1
2
3
4
C845
0.1
0
.0047
C842
0.0047
R842
100
C844
0.1
C843
0.1
8
7
6
5
C851
100p
C841
0.0047
R841
470
R832
10k
-
+
8
9
10
IC811c
C828
100p
R831
1M
C827
0.0047
C826
0.1
R829
100k
R828
470k
R827
120k
R826
100k
14
13
12
-
+
C824
0.0015
R825
82k
R830
2.2M
C825
0.1
C823
0.1
R824
82k
C822
0.039
R823
82k
R822
1M
R821
2.2M
C821
0.1
C815
10
R816
100
-
+
1
3
2
11
4
C814
0.1
IC811a
NJM2902V
R814
150k
R815
150k
C813
0.01
R812
39k
R813
10k
C812
0.01
C81
1
0.1
R81
1
10k
IC791
TA31136FN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OSCIN
OSCOUT
MIXOUT
VCC
IFIN
DEC
FILOUT
FILIN
MIXIN
GND
N-REC
N-DET
RSSI
IFOUT
QUAD
AFOUT
C799
220p
R795
150k
C800
220p
R797
1k
C797
0.0047
R796
3.3k
C801
0.1
C802
0.1
FI791
SFPC455E-
TC01
R794
330k
C798
0.01
C796 0.1
R780
470
C793
0.0047
C794
22
X791
CDBC455CX24
C795 100p
R793
1.5k
L791
100uH
C803 1
R803 4.7k
NSQL
DOUT
16
15
14
13
12
11
10
9
DD
X2
X1
X
X0
X3
A
B
C1
142
0.0047
R1
146
470k
R1
147
470k
R1
148
470k
C1
143
10
D96S
MODS
R1141
47k
D732
UMC3N
IC971
TC4W53FU
1
2
3
4
8
7
6
5
MINH
AMS
R971
10k
C971
0.0047
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
XIN
CE
CL
DI
LDB
LDA
CA
TEST
PDA2
PDA1
AIA
AOA
XOUT
PDB2
PDB1
AIA
AOB
OUTB
CB
VDD
PIB
VSS
PIA
OUTA
IC1011
LC715317
R1012
33k
C1012
0.1
R1013
15k
C1013
2.2
R1014
1.8M
C1011
0.0047
R1011
100
IFST
MCK
MOT
C1014
0.0047
C1015
0.0047
C1016
10
D101
1
MA2S1
1
1
L1012
100uH
CP1011
R1017
10k
C1017
0.1
C1018 1
R1019
2.2k
C1019
0.0047
R1020
470k
D1012
MA357
R1018
100k
C1020
68p
C1021
56p
C1022
20p
L1013
2.2uH
C1023
150p
D1014
1SS375
D1013
1SS375
R1023
100k
C1025
150p
C1024
150p
Q1011
2SK210
R1021
100
C1026
0.0047
R1024
150
L1014
10uH
Q1012
DTC114EE
C1027
10p
R1026
100k
R1022
100k
Q1013
2SC4081
C1028
0.0047
R1027
1k
R1028
1k
C1030
10
C1031
0.0047
C1032
0.0047
R1029
10k
R1030
10k
C1033
22p
L1015
56uH
L101
1 100uH
C961
0.47
R964
33k
R963
100
R965
220
Q961
2SC4081
C963
10
C982
0.1
R982
47k
R983
18k
C983
0.1
R984
15k
ET
ON
C984
0.1
R986
180k
R987
270
C985
0.1
-
+
2
3
1
R985
150k
IC981a
NJM2058M
4
11
R988
150k
R992
390k
T
ONE
C986
0.1
R991
680k
R990
270k
R989
150k
C987
0.001
R993
82k
C988
0.0022
R994
82k
C989
120p
-
+
6
5
IC981b
R995
1.2k
R999
R
V
-150
(10kB)
2F80
Q981
DTC114EE
R996
1k
R1004
10k
R1002
R
V
-148
(4.7kB)
R1003
68k
R1001
68k
AMS8
Q1041
DTC114EE
R1041
100
C1041
1
D1041
MA2S1
1
1
R1043
47k
R1045
RV-148
(4.7kB)
R1044
47k
R1049
1.2k
R1046
1k
R1047
1k
R1048
820
C1045
10
C1043
0.1
C1044
0.0047
L1041
100uH
C1046
0.1
R1051
8.2k
C2234
0.1
R1050 330
1
2
3
4
5
6
7
14
13
12
11
10
9
8
IC1041
NJM1496V
VS+
VCS
VCS
VS-
BIAS
VO+
NC
VEE
NC
VO-
NC
VCC-
NC
VCC+
C1052
0.1
C2233
0.1
C1053
10
C1048
0.1
C1047
10
L1042
100uH
C1049
0.0047
W1056
R1057
1k
R1054
680
R2244
560
R1052
330
CP1041
R1055
10k
C1050
0.0047
D1042
MA862
C1051
0.1
L1044
100uH
L1043
100uH
C1061
10
D1061
MA8027
Q1061
2SA1576
Q1062
2SC4051
R1061
470
R1062
1k
UNF8
D721
MA862
WCNT
D921
DAN222
TIFS
C922
3.3
R923
470
R922
8.2k
R921
RV-109
(2.2kB)
C921 1
CP921
KDS8
C923
22
R924
4.7k
R1164
18k
C1162
0.1
R1163
15k
R1162
100k
C1161
0.47
R1161
100k
-
+
C1163
0.1
R1165
100k
13
12
14
R1166
330k
IC981d
C1
164
0.1
D1161
1SS385
R1167
100k
C1
165
0.1
R1
168
100k
R1
169
150k
R1
170
100k
+
-
8
10
9
IC981c
OVDV
R665
10k
C662
0.0047
D672
MA862
C571
0.0047
L671
8.2uH
R672
2.2k
R663
10k
1
3
4
2
FI671
FL-272
MP5
R671
2.2k
C672
0.1
R673
220
C673
0.1
R674
10k
2F23
R662
10k
D671
MA862
C661
0.0047
D682
MA862
C683
82p
L682
10uH
R682
2.2k
R684
10k
2F80
D683
MA2S111
FI681
FL-94
L681
22uH
C682
1.5p
R681
2.2k
D681
MA982
C684
0.1
C685
0.1
R683
220
D691
MA982
D692
MA982
2FTH
R692
2.2k
R693
10k
R691
2.2k
C692
0.1
C691
0.0047
D701
MA982
D702
MA982
C701
0.0047
L701
8.2uH
R702
2.2k
R701
2.2k
C702
0.1
R703
220
C703
0.1
R704
10k
OP1
D711
MA982
D712
MA982
C711
0.0047
L71
1
8.2uH
R712
2.2k
R71
1
2.2k
C712
0.1
R713
220
C713
0.1
R714
10k
OP2
R664
10k
C664
0.1
C663
0.1
R661
10k
HFOR
D1072
MA2S728
VFOR
UFOR
D1073
MA2S728
FORL
POCV
R1070
56k
R1075
10k
D1074
1SS385
D1075
MA2S111
D1076
MA8033
D1077
MA8033
R1079
330
W1078
CP1002
CP1071
R1071
47k
R1072
470k
C1096
20p
R1073
1M
R1076
100k
R1077
220k
-
+
6
5
7
D1071
MA2S111
R1074
2.2M
R1091
330
C1091
10
R1092
470
CP1091
Q1091
DTC114EE
AMS8
D1091
DAP222
R1093
10k
C1094
1
R1094
150
R1097
10k
R1096
22k
R1095
4.7M
R1099
10k
3
2
+
-
1
4
11
R1098
10k
R1
100
220
R1
102
1k
R1101
220
R1104
100
C1095
0.0047
R1
103
10
IC1091a
NJM2902V
Q2226
DTC114EE
Q1071
DTC114EE
R1080
RV-156
(220k)
Q1072
DTC114EE
R1082
RV-156
(220k)
R1081
100k
BHF
Q1073
DTC114EE
R1084
RV-156
(220k)
R1083
100k
L7
Q1074
DTC114EE
R1086
RV-156
(220k)
L8
Q1075
DTC114EE
R1088
RV-156
(220k)
L9
HREF
UREF
D1111
1SS385
VREF
D1112
1SS385
REFL
CP1111
R
1111
1k
R1113
100k
R1115
1.8k
10
9
+
-
8
IC1091c
R1112
1M
R1116
470
D1113
DAP222
R1114
10k
12
13
+
-
14
IC1091d
R1126
1M
R1127
470
ICH
ICL
R1124
33k
R1125
RV-150
(10kB)
R1121
47k
R1122
47k
R1
123
33k
Q1131
2SA1576
R1132
1k
R1
131
10k
D1
131
MA8036
R1
133
100k
D1132
DAP222
Q1114
1SS385
Q1101
DTC114EE
CP1001
EALC
Q2227
DTC114EE
IDS
ALC
AMS
L1
L2
L3
L4
L5
L6
L7
L8
L9
B0
B7
B7W
BHF
IDS
1F15
2F23
2F80
2FTH
OP1
OP2
RXS
ATTS
PR1S
PR2S
PR3S
PR4S
TB1V
TB2V
TB3V
TB4V
RFGV
AGFS
AFGC
AFMS
AFS1
AFS2
SQL
SQLS
NBS
CTCV
NSQL
AVXL
VOXL
COMS
MIGV
MINH
MODS
DRIV
POCV
KDS8
TIFS
ETON
TONE
ALCL
FORL
REFL
SML
LRXD
LTXD
MCK
MDT
IFST
ICK
DDT
DINT
DSPS
IMST
CON0
CON1
CON2
DRES
PBST
PCE
PCK
PDST
PDT
MLLV
UL
BDT
KEY
STRT
CIV
CIVE
SPCH
BEEP
DASH
DOT
U/D
BANV
SPS
POWS
PWK
SEND
SDSS
PTTP
0VDV
D95S
SNDSR
H5V
14V
HV
8V
5V
R8V
T8V
2IF
R781
100k
R774
1k
R751
470
C741
0.0047
C736
0.1
IC811d
R1016
47k
R1015
47
R1025
100
C1029
12p
R967
1k
R966
3.9k
C964 1
R981
10
C981
10
R1000
560
R1042
R
V
-155
(150kB)
Q1092
2SC4081
R1128
47k
R845
56k
IC811b
C681
1.5p
IC1091b
8V
FMAF
R1031
10k
Q982
DTC114EE
R998
22k
D981
1SS385
D1078
MA2S728
1
2
3
Q1014
UMC1N
5
4
MAIN (3)
R731
15k
ALCL
3.2 V
1.9 V
5.8 V
6.1 V
4.0 V
0.8 V(FM)
6.6 V(FM)
4.3 V(FM)
3.4 V(FM)
6.3 V
4.3 V
3.7 V
4.4 V
4.4 V
5.9 V
3.9 V
2.5 V
COMPLETE VIEW
Summary of Contents for IC-706MKIIG
Page 1: ...SERVICE MANUAL HF VHF UHF ALL MODE TRANSCEIVER i706MK G ...
Page 58: ... HPF BOARD BOTTOM VIEW DRIVER BOARD BOTTOM VIEW 8 6 ...
Page 60: ... PA UNIT BOTTOM VIEW 8 8 ...
Page 62: ...1 8 16 9 PLL UNIT BOTTOM VIEW 8 10 ...
Page 64: ... FILTER BOARD BOTTOM VIEW 8 12 ...
Page 85: ...6 9 16 Kamihigashi Hirano ku Osaka 547 0002 Japan A 5564HI S C 1999 by Icom Inc ...