![background image](http://html.mh-extra.com/html/icom/ic-706mkiig/ic-706mkiig_service-manual_612196083.webp)
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10
9
8
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6
5
4
3
2
1
76
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80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
C101 0.1
C102 0.1
C103 0.1
C1
10 0.1
C1
1
1
0.1
C1
12 0.1
C1
13 0.1
C1
14 0.1
C109 0.1
C108 0.1
C107 0.1
C104 0.1
C105 0.1
C106 0.1
R13 100k
C13
0.0047
Q1
2SK210
C14
150p
R15 150
L1
1
10uH
C15 150p
C21
3p
R21
47k
Q21
2SC4081
C12
0.0047
R12 100
C1
1
10
R11 47
R23
100
R24
270
C22
0.1
C31
0.0047
R14 100k
L1
LB-343
L30 100uH
C2 30p
C4 20p
C3 4p
R16 4.7k
D1 MA357
C1 0.01
R32 820
R34 1
R41
15
R42 68
R54
68k
R52
47
R53
270
C52
0.0047
Q71
2SC4081
R71 47
C72 0.1
C73 22p
R72
220
R73
68k
R76
47
L71
4.7uH
FI71
SFECV10.5MA-5
C76 47p
C77 47p
R75 180
C71
0.0047
R170
2k
R172
2k
R174
2k
R176
2k
R178
2k
R180
2k
R182
2k
R184
2k
R186
2k
R188
2k
R190
2k
R192
2k
R171
1k
R173
1k
R175
1k
R177
1k
R179
1k
R181
1k
R183
1k
R185
1k
R187
1k
R189
1k
R191
1k
R193
1k
Q51
2SC4081
R135 1k
R134
150k
R133
100
C133
1
Q491
2SK880
C493
0.001
R494
1M
R493 100k
C491 0.001
CP401
C492
0.001
R492
100k
R162
18k
C165
100p
C163
0.0047
L163
0.22uH
R101 1k
R102 1k
R103 1k
R104 1k
R105 1k
R106 1k
Q161
2SC4403
C161
0.0047
L161
100uH
R161
330
R153 10k
C148 0.0047
C153 0.0047
R143
1k
Q143
DTA114EU
R144
1k
C154 0.0047
R154 10k
C149 0.0047
Q144
DTA114EU
Q145
DTA114EU
C150 0.0047
R155 10k
C155 0.0047
R145
1k
R142
1k
C152 0.0047
R152 10k
C147 0.0047
Q142
DTA114EU
Q141
DTA114EU
C151 0.0047
C146 0.0047
R151 10k
R141
1k
C145 0.0047
R132
2.2M
C132
0.1
R131
12k
R43
15
C41
0.0047
R491
100
C166
100p
R164
68
C301
470p
L301
LW-25
C302
470p
C308
150p
C303
0.0047
L302
E544GN-110248
Q301
2SK508
R321
330
Q321
2SC4213
R322
10k
C322
0.0047
C323
0.0047
R323
4.7k
C304
1p
C321
0.0047
C326
0.0047
C331
150p
L331
LW-25
C332
470p
Q331
2SK508
L332
E544GN-110254
C333
0.0047
R351
150
C353
0.0047
Q351
2SC4213
R352
10k
C352
0.0047
R353
4.7k
C334
1p
C355
0.0047
C351
0.0047
R356
68
L333
LW-25
L303
LW-25
D301
KV1470
C306
10p
C307
0.1p
D331
KV1470
C336
4p
C335
10p
R302
100
C305
470p
R332
100
R392
10k
R391
10k
C391
22
Q391
2SC4116
C392 0.001
L391 10uH
R324
1k
C325
470p
Q322
DTN144EU
D332
MA77
R354
1k
Q352
DTN144EU
C326
470p
R325 10k
R355 0.0047
C382
0.0047
C382
0.0047
R382
10k
R385
10k
L382
100uH
R383
4.3k
Q381
2SC4213
C385
0.0047
C381
0.0047
R381
330
R384
10k
L383
2.2uH
C368
1p
D362
MA77
C366
6p
C374
7p
Q361
2SK508
L363
2.2uH
C370
0.3p
L354
2.2uH
D361
MA304B
C367
6p
L356
C-13975-4.5
C375
0.001
C364
470p
C376
2.2
C369
470p
R361
68
W301
L411
LR-270
C444 0.68
2
1
3
4
5
9
10
8
7
6
VCC2
IN+
IN-
OUT
GND
VCC
VCAOUT
CTL
VCAIN
NC
IC201
M5282FP
R201
47k
C201 10
C206 10
R204 220k
C204 220p
D231
DAN222
C238 0.0047
RL231
SY-12-K
C241 0.1
R235
4.7
C237
0.1
R234 470
C235
470
C234
0.1
C231
470
IC231
LA4425A
2
1
4
5
3
C233
0.0047
R233
1k
C232
0.47
L231 LR-270
R232
10k
C208
1
C207 0.47
C205
0.47
R206
1k
R205
1
C209 10
C203
0.1
R203
10k
C202
0.47
R208 2.2k
C210 0.001
R209 2.2k
R202 10k
R207 10k
Q232
DTC114EU
C240
0.1
C239 0.1
R261 47k
Q261
DTC114EE
D261
DAN222
C262 0.001
C236
470
FLO
1
CPO
2
GND
3
GND
4
FIN
5
FIN
6
VCC1
7
OSCIN
8
VP
VCC2
FD/LD
LE
DATA
CLOCK
CE
GND
16
15
14
13
12
11
10
9
IC461
LMX2306TM
C465
0.01
R465 100k
C464 10p
C463 0.0047
L461
10uH
C461
4.7
R461
100k
Q461
DTA144EU
R412
1.2k
R411
100
C414
10
R462 1k
R464 1k
R463 1k
C472
0.0047
34
35
36
37
38
39
40
41
42
43
44
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
33
32
31
30
29
28
27
26
25
24
23
R251 1k
R252 1k
R253 1k
R254 1k
R255 1k
R256 1k
R257 1k
R258 1k
R259 1k
R260 1k
L42 EXCCL3225U
L45 10uH
L41
EXCCL3225U
L1000
0.1uH
C1006 0.001
C251 0.001
C1000 0.001
C1001 0.001
C1005 0.001
C1002 0.001
C215 47p
L1001 EXC-ELDR25C
L48 10uH
L44 EXCCL3225U
L43 EXCCL3225U
R263
1k
Q251
DTA144EU
R101
1 470
C224 47p
R1012 470
R1013 470
R1014 470
R1015 470
R1017 470
C221 0.0047
L1015 10uH
C220 47p
C295 10
C281 0.0047
R283
47k
R284
680
C286
0.1
IC281
TA7808S
R285
1k
I
G
O
CP281
CP282
C272 0.0047
C271 10
IC271
TA78L05F
G
I
O
R264
1k
D271
MA114
C273 0.0047
C274 10
C284
10
C285
0.0047
C291 10
C292 0.0047
IC291
TA7805F
G
I
O
C294 10
C293 0.0047
R291 22
R292 22
Q931
2SC4081
D931
MA2S111
R932
33k
C931 0.1
R933 15k
C934 0.0047
R931
4.7k
C935
0.0047
R934
2.2k
R942
18k
C941
0.0047
C945
100p
Q941
2SC4403
R944
68
C944
100p
L941
0.22uH
R943
330
C942
0.1
R901 1k
C902
0.1
C903
0.1
C904
0.1
C905
0.1
C907
0.1
C906
0.1
L901
10uH
R902 1k
R903 1k
R951
2k
R953
2k
R955
2k
R957
2k
R959
2k
R961
2k
R963
2k
R965
2k
R967
2k
R969
2k
R952
1k
R954
1k
R956
1k
R958
1k
R960
1k
R962
1k
R964
1k
R966
1k
R968
1k
R970
2k
C373
100
R364
10k
R365
10k
Q362
2SC4116
C372
0.001
L367 10uH
4
3
1
2
D701
MA862
C712
10p
C714
7p
C71
1
33p
C713
47p
C715
27p
L712
0.1uH
L713
82nH
R701
1k
C701
0.0047
L711
82nH
4
3
2
1
D732
MA862
C743
33p
C742
9p
C744
5p
C741
30p
C745
18p
L742
68nH
L743
68nH
R731
1k
C731
0.0047
L741
56nH
1
2
3
4
D731
MA862
Q10
2SC4405
C514
0.0047
R51
1
8.2k
L501
10uH
C512
0.0047
R517
18
R515
470
R516
270
R512
3.7k
C51
1
0.0047
R513
100
R518
270
D302
MA77
D862
DAN202U
1
2
4
3
D761
1SV237
R751 1k
C771
12p
C773
15p
L781
47nH
L782
33nH
R762
100
C781
0.0047
D752
1SV237
C782
3p
C784
8p
C772
68p
L771
82nH
C781
15p
C783
27p
C785
12p
R791
1k
C801
22p
L811
27nH
L812
33nH
R792
1k
C791
0.0047
C812
6p
C814
2p
C813
18p
C815
10p
C81
1
8p
C804
82p
L802
83nH
L801
47nH
C802
27p
C803
10p
C805
18p
L821
47nH
C825
68p
L822
33nH
C821
27p
C829
22p
C831
12p
C828
4p
C827
27p
C830
7p
C826
0.001
D821
1SV308
C822
12p
C823
10p
C824
8p
L824
27nH
L823
39nH
R822
1k
R823
1k
D822
1SV308
D861
1SV237
2
1
3
4
L861
22nH
C865
47p
L862
15nH
C861
15p
C873
5p
C874
1.5p
C872
0.5p
C871
9p
C875
5p
C862
10p
C863
5p
C864
8p
L872
12nH
L871
15nH
R852
1k
R851
1k
D851
1SV308
R821
150
D863 MA2S1
1
1
D864
MA2S111
C501
0.0047
R501
33
R502
4.7k
L531
LR-317
D531
MA717WK
L532
0.22uH
C537
0.0047
R531
150
R532
39
W592
R533
150
C541
0.0047
1
5
4
2
3
5
R538
18
R539
270
R537
270
C531
0.0047
D511
MA77
R523
1k
4
5
1
2
3
Q521
UMC3N
L542
0.22uH
R524
10
C542
0.0047
C547
0.0047
C543 0.0047
R541
150
R542
39
IC541
uPC2710
C881
82p
C883
82p
L882
10nH
C886
4p
R892
39
C882
220p
L881
0.12uH
C884
4p
C885
4p
R893
150
R601
1k
R602
R
V
-150
(10kB)
R604
1k
R605
47k
D601
MA357
R603 1k
C602 0.0047
C603
0.0047
R605
10
R621
15k
C623
0.0047
L600
100uH
C600
0.1
L621
100uH
Q621
2SC4403
C625
0.0047
C624
56p
R623
470
R622
4.7k
L623
LS-508
R641
220
L641
3.3uH
L642
3.9uH
C662
0.0047
C642
2p
C644
0.75p
C641
7p
C643
10p
C645
8p
R663
2.2k
C563
0.0047
R662
1.8k
Q661
2SC4403
R661 100
R665
68
R664
180
D825 1SV308
R825
10k
R824
1k
C685 27p
C684
1p
C682 27p
C664
47p
C665
0.0047
R666
150
R682
22k
R683
10k
Q681
2SC4403
R684 220
C681 0.0047
C683 0.0047
R681
100
L681
LS-509
L991
12uH
L992
15uH
C992
5p
C994
2p
C991
18p
C993
33p
C995
18p
C982
47p
L981
33uH
C983
18p
C981
18p
R853
1k
C851
0.0047
C852
0.0047
C876
0.0047
Q851
DTA114EU
J891
P891
J681
P681
2LO
1LO
J991
P991
J251
P251
EP2
VSS
PD2
PD1
PD0
VSS
PDTRI
VSS
VDD
REFOSC
RC
FCK
VDD
VSS
O12MA
O4MA
VSS
VDD
ETCO7
ETCO6
ETCO5
ETCO4
ETCO3
ETCO2
ETCO1
ETCO0
VDD
VSS
VSS2
BUM21
BUN21
BUN41
VSS
BUM20
BUN20
BUN40
VSS
VDD
SYS CLK
VSS
VSS
STRB
CON2
CON1
CON0
VSS
BUSY
VSS
CONT
CLK
D
ATA
VDD
VDD
OIVOUT
VSS
REFIN
POIN
VSS
OSCO
VSS
VDD
OSCF
OSCI
VSS
VDD
SYSRESET
VSS
VDD
VDD
TEOUTH4
TEOUTH3
YEOUTH2
TEOUTH1
TEOUTH0
TEST
OUT
VSS
VDD3
VDD
VDD
TE3
TE2
TE1
VSS
DA11
DA10
DA9
DA8
DA7
DA6
VDD
VSS
DA5
DA4
DA3
DA2
DA1
DA0
VDD
VSS2
VSS
SYSCLK0
VSS
VSS
UL
P1
TREE
P2
VDD
VSS
STRB
DATA
CON CLK
VDD
VSS
FSK1
FSK0
ETC0
ETC1
VDD
SYS CLK
NUM0
NUM1
NUM2
VDD
I
Q
POM2
POM1
POM0
VDD
VSS
RESET
ROMCE
VDD
DA9
DA8
DA7
DA6
DA5
VSS
DA4
DA3
DA2
DA1
DA0
VSS
AFI
AFIE
AFOE
AFO
ESPD
ESPD
ESPE
ESPE
POWS
GND
GND
14V
14V
14V
THEA
GND
8V
8V
2HBL
HV
DAES
DINT
INST
DOT
ICK
5V
DSPS
GND
GND
GND
H5V
DRES
PDST
CON2
CON1
CON0
PCK
POT
PBST
PCE
MLLV
SPS
AFGC
5V
DSCP
UL
AFBP
8V
8V
POWS
AAF
GND
DINT
ICK
IMST
DDT
FSKK
14V
14V
HV
FSKK
AFBP
UL
SPS
MLL
V
PCE
BSTB
RDA
T
RCK
CON0
CON1
CON2
DSTB
DRES
J254
J253
J252
5V
ULD
DRES
LOF5
LOF4
LOF3
THER
VCO1
LOF2
LOF1
5V
VCO3
VCO2
VCO1
DSTB
CON2
CON1
CON0
PCM
PDA
T
MLL
V
UL
5V
14V
AFBP
THER
FSKK
14V
ULP
PON
RDA
T
BSTB
SPS
ULP
ULD
DRES
5V
VCO1
VCO2
5V
PCK
PDA
T
PCE
VCO3
LOF1
LOF2
LOF3
LOF4
LOF5
8V
C251
0.001
C44 0.0047
C222 47p
C225 47p
C1004 0.001
C265 0.001
R265 27k
R236
8.2k
C256
0.1
L131 10uH
C131
0.0047
C51
0.0047
CP131
C5 150p
C75
0.0047
IC101
SC-1246
IC901
SC-1287
C626
56p
L601
LB-146
X621
CR-275A
L622
EXCCL3225U
BFO
3
4
2
1
Option
C218 1
W993
5V
C212 0.0047
C45 1
H5V
5V
8V
R237
3.3
R231
100k
8V
8V
5V
8V REF
LOF6
L682
LS-509
C686 47p
PLL
30MHz
8V
• PLL UNIT
10 - 8
MAIN (3)
J1431
PA
J621
MAIN (3)
J1381
Optional
unit
MAIN (3)
J551
MAIN (3)
J791
MAIN (1)
J281
MEASUREMENT CONDITIONS
SUPPLY VOLTAGE:13.8 V
14.1 MHz USB
DIGITAL MULTIMETER :50 k‰/V
0.65 V
2.5 V
0.65 V
0.65 V
2.8 V
3.3 V
2.4 V
0.75 V
4.4 V
3.9 V
13.2 V
12.7 V
4.4 V
8.0 V
6.4 V
5.0 V
10.8 V
5.0 V
AF GAINCENTER:2.2 V
0.85 V
13.5 V
CONNECT PHONE:4.8 V
NO CONNECT PHONE:0 V
3.9 V
30.0—59.999999 MHz
129.0—199.999999 MHz
CONNECT PHONE:0 V
NO CONNECT PHONE:4.8 V
0.03—29.999999 MHz
60.0—128.999999 MHz
CONNECT PHONE:0 V
NO CONNECT PHONE:4.8 V
3.3 V
3.9 V
59.999999—470.0 MHz
CONNECT PHONE:0 V
NO CONNECT PHONE:4.8 V
0.03—29.999999 MHz
CONNECT PHONE:4.9 V
NO CONNECT PHONE:0 V
30.0—59.999999 MHz
CONNECT PHONE:4.9 V
NO CONNECT PHONE:0 V
0.03—29.999999 MHz
CONNECT PHONE:4.9 V
NO CONNECT PHONE:0 V
129.0—143.999999 MHz
148.000001—199.999999 MHz
CONNECT PHONE:4.9 V
NO CONNECT PHONE:0 V
144.0—148.0 MHz
CONNECT PHONE:4.9 V
NO CONNECT PHONE:0 V
1.8 V
3.5 V
1.1 V
2.7 V
1.8 V
7.5 V
1.3 V
2.0 V
7.7 V
1.3 V
0.75 V
2.4 V
RIGHT SIDE
LEFT SIDE
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 ...