![background image](http://html.mh-extra.com/html/icom/ic-7800/ic-7800_service-manual-addendum_612348313.webp)
Jul. 2008
64
VOLTAGE LINE
Explanatory notes
TX LINE
BUS LINE1
J900
J940
BUS LINE4
BUS LINE2
BUS LINE3
2
10
1
11
3
4
5
6
7
8
9
12
13
14
15
16
STROBE
IC290
CD74HC4094M
DATA
CP
Q0
Q1
Q2
Q3
GND
QS1
QS2
Q7
Q6
Q5
Q4
OE
VCC
R299 10k
R300 10k
2
10
1
11
3
4
5
6
7
8
9
12
13
14
15
16
STROBE
IC310
CD74HC4094M
DATA
CP
Q0
Q1
Q2
Q3
GND
QS1
QS2
Q7
Q6
Q5
Q4
OE
VCC
R298 10k
IC291
TD62783AF
9
8
7
6
5
4
3
2
1
10
11
12
13
14
15
16
17
18
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
VS
GND
O8
O7
O6
O5
O4
O3
O2
O1
R320 10k
R319 10k
IC311
TD62783AF
9
8
7
6
5
4
3
2
1
10
11
12
13
14
15
16
17
18
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
VS
GND
O8
O7
O6
O5
O4
O3
O2
O1
C310
0.1
DRES
R301 10k
MSTB1
MD
A
T
MCK
MSTB1
MD
A
T
MCK
C290
0.1
R302 10k
R303 10k
R304 10k
R296 10
R295 10
R294 10
R293 10
R292 10
R291 10
R290 10
R318 10k
R321 10k
R322 10k
R323 10k
R324 10k
R325 10k
R316 10
R317 10
R315 10
R314 10
R313 10
R312 10
R311 10
R310 10
AFON
DRES
+3R3V
AFON
DRES
AFON
C291
0.1
C311
0.1
L290 EXCCL3225U
+15V
+8V
+3R3V
+5V
-12V
MMUT
MCPS
MONS
SSA
SSB
SMUT
TRVSM
CROSS
MONS
MAFS
PMIX
SPON
A_AFA
B_AFA
UNSB
c(from MAIN unit(3))
C841
0.0047
D806
MA77
R835
1k
R836
3.3k
C840
0.1
+15V
+8V
+3R3V
+5V
-12V
T8V
C839
0.0047
R833
2.2k
R832
56
R583
820
R582
5.6
R834
1k
(from MAIN unit(3))b
C559
0.0047
L515
0.22
R563
68
C560
39p
R513
0
Q507
2SC4673
R564
33k
C562
0.001
C561
0.0047
L516
0.33
R566
120
L517
10
C563
0.1
L513
617DB
C557
5p
D506
HSB88WS
C558
18p
L514
617DB
R562
100
C564
39p
L518
56n
C565
100p
C566
82p
L519
0.1
C567
47p
C568
100p
R569
270
R568
270
R567
18
C588
27p
C587
10p
L526
68n
C586
33p
C585
7p
L525
68n
C584
24p
L524
68n
R580
270
R578
18
R579
270
L527
0.15
C589
12p
C590
56p
C570
0.01
R571
10k
R587
10
R589
470
L522
LR-488
R570
4.7k
R573
470
R591
820
R590
820
C573
0.1
R574
47
R572
4.7
Q508
2SC5501
C572
0.01
C571
0.1
R592
220
L521
LR-489
C577
0.1
R575
270
R576
18
R577
270
C574
0.1
R581
820
C578
56p
L523
0.15
C579
7p
C580
56p
L529
0.15
C556
0.0047
C555
15p
R558
100
Q506
2SK882
R555
680
R556
2.2k
C554
0.1
C553
6p
R554
1k
L511
0.47
C552
0.001
R553
150
ALC
ALC
ALC
ALC
ALC
ALC
ALC
R552
4.7
C551
0.0047
L510
LR-414
GND
OUT
IN
GND
4
2
5
6
1
3
C576
10p
C544
3p
L509
LR-414
R548
5.6
L508
LR-358
D505
HSB88WS
C546
470p
L507
LR-395
R547
820
R546
820
R545
5.6
d(from MAIN unit(3))
R541
330
R540
15
R543
330
8
7
6
5
4
3
2
1
LO2
GND
IF2
IF1
LO1
VCC
RF2
RF1
IC503
TA4107F
C517
0.1
L502 100
L503 100
R515 560
L501
100
C518
0.1
C519
0.1
C520
10
C521
0.1
R516
1k
R517
4.7k
e(from MAIN unit(3))
R511
100
R514 1k
C516
0.001
DRIV
ALC
C522
0.1
R518
470
L528
100
R585
22k
C523
0.1
C524
10
L504
1000
R524
10k
C525
0.0047
Q501
3SK294
C526
0.1
R523
220
C528
0.1
R526
1k
R527
10k
C530
0.1
R528
10k
D501
MA77
C531
0.0047
FI501
CFWS455D
O
I
C533
0.0047
R530
10k
D503
MA77
R532
1k
C535
0.0047
D502
MA77
C532
0.0047
FI502
CFWS455IT
O
C534
0.0047
I
D504
MA77
R529
10k
R531
10k
R519
10k
R521
22k
R533
10k
C536
0.1
C537
0.0047
C538
0.047
R535
1k
R536
2.7k
C539
0.1
C540
10
R537
100
R538
RH03ADCJ4X
C541
0.1
R539
470
L505
LS-469
Q504
2SK882
Q502
DTC114EU
R534
10k
Q503
UMH11N
4
3
2
1
5
6
MODS
MODS
C529
0.1
C527
0.0047
1
2
3
4
5
6
7
8
VT
-I
+I
V-
VT/COMP
V+
OUT
COMP
IC501
NJM5534MD
C506
0.1
C505
390p
C503
0.0015
R504
1k
R503
1k
R501
1k
C501
0.1
R502
10k
C502
0.0012
TX36K
+8V
+8V
+3R3V
+15V
+8V
+5V
T8V
T8V
+15V
+3R3V
+8V
+5V
+15V
+3R3V
+8V
+5V
+5V
+5V
+5V
+15V
+3R3V
+8V
+15V
+3R3V
C507
10
-
12V
-
12V
-
12V
-
12V
-
12V
R505
100
C508
10
C509
0.1
R506
100
C581
22p
R507
1k
7
8
4
VT
3
2
5
1
6
-I
+I
V-
VT/COMP
V+
OUT
COMP
IC502
NJM5534MD
C512
0.1
C511
270p
C510
0.0027
R508
1k
C513
10
R509
100
C515
10
C514
0.1
R510
100
C582
22p
C583
0.1
D601
MA77
R601 100
C604
120p
C605
330p
C607
27p
C606
180p
C608
330p
C609
47p
L603
12
C612
120p
C613
330p
C610
180p
C611
27p
L602
12
L604
12
D602
MA77
+8V
+15V
+3R3V
+5V
-12V
T8V
R520
39k
D603
MA77
R602 100
C621
39p
C620
330p
C623
330p
C622
39p
L608
5.6
C625
330p
C624
47p
C629
330p
C628
39p
C626
39p
C627
330p
L607
5.6
L609
5.6
D604
MA77
TXB2
TXB1
D611
MA77
R606 100
R613
18
C685
47p
C684
47p
C687
33p
C686
33p
L628
1.8
C689
82p
C688
10p
C693
47p
C692
47p
C690
33p
C691
33p
L627
1.8
L629
1.8
D612
MA77
D613
MA77
R607 100
C701
18p
C700
47p
C703
22p
C702
15p
L633
1.5
C705
47p
C704
8p
C709
47p
C708
18p
C706
15p
C707
22p
L632
1.5
L634
1.5
D614
MA77
TXB7
D605
MA77
R603 100
C637
33p
C636
180p
C639
82p
C638
15p
L613
6.8
C641
120p
C640
56p
C645
180p
C644
33p
C642
15p
C643
82p
L612
6.8
L614
6.8
D606
MA77
TXB3
C649
330p
D607
MA77
L616
2.2
R604 100
C653
27p
C652
150p
C655
120p
C654
27p
L618
3.3
C657
150p
C656
10p
C661
150p
C660
27p
C658
27p
C659
120p
L617
3.3
L619
3.3
D608
MA77
TXB4
C665
220p
D609
MA77
L621
1.2
R605 100
C669
22p
C668
100p
C671
33p
C670
39p
L623
2.7
C673
82p
C672
22p
C677
100p
C676
22p
C674
39p
C675
33p
L622
2.7
C680
220p
L625
1.2
L624
2.7
D610
MA77
TXB5
D615
MA77
R608 100
C717
18p
C716
33p
C719
33p
C718
10p
L638
0.82
C721
47p
C720
10p
C725
33p
C724
18p
C722
10p
C723
33p
L637
0.82
L639
0.82
D616
MA77
TXB8
D617
MA77
R609 100
C733
12p
C732
22p
C735
22p
C734
0.5p
L643
0.68
C737
22p
C736
7p
C741
22p
C740
12p
C738
0.5p
C739
22p
L642
0.68
L644
0.68
D618
MA77
TXB9
D619
MA77
L647
95n
R611 100
C760
6p
C750
6p
C749
2.5p
L649
0.61
C751
10p
C756
6p
C761
6p
C755
2.5p
L648
0.61
L651
95n
L650
0.61
D620
MA77
TXB10
R610
470
L646
330
R900 100
R920 100
R901 100
R902 100
R903 100
R904 100
R906 100
EP907
EP901
EP905
R908 100
R909 100
R910 100
R911 100
R912 100
R913 100
R914 100
R915 100
R916 100
R917 100
R921 100
R922 100
R923 100
R924 100
R925 100
R926 100
R927 100
R928 100
R929 100
R930 100
R932 100
R933 100
R934 100
R936 100
R937 100
C981 0.0047
C901 0.0047
C902 0.0047
C903 0.0047
C904 0.0047
C905 0.0047
C906 0.0047
C907 0.0047
C908 0.0047
C909 0.0047
C922 0.0047
C923 0.0047
C924 0.0047
C925 0.0047
C926 0.0047
C927 0.0047
C928 0.0047
C929 0.0047
C930 0.0047
C932 0.0047
C933 0.0047
C934 0.0047
C936 0.0047
C937 0.0047
EXRL1
EXRL2
TRVI
RTKI
SENI
SEND
ASND
T8V
+8V
+5V
+3R3V
+15V
-12V
T8V
T8V
T8V
T8V
T8V
MR8V
CP495
SR8V
CP496
RSTBB
RSTBA
ASTB2
ASTB1
MSTB2
MSTB1
MCK
MDAT
CIVE
FORV
REFV
FANV
IDL
VDL
ALCL
THML
SQLAM
SQLAS
SQLM
SQLS
DULSA
DULSB
KEY
LED1
LED0
VOXAFE
VOXAF
CIV
R960 100
R961 100
R962 100
R963 100
R964 100
R966 100
R967 100
R968 100
R969 100
R970 100
R971 100
R972 100
R973 100
R974 100
R975 100
R976 100
R977 100
R978 100
R979 100
R940 100
R941 100
R942 100
R943 100
R944 100
R945 100
R946 100
R947 100
R948 100
R949 100
R950 100
R951 100
R952 100
R953 100
R954 100
R955 100
R957 100
R958 100
C945 0.0047
C946 0.0047
C947 0.0047
C948 0.0047
C952 0.0047
C953 0.0047
C954 0.0047
C955 0.0047
C957 0.0047
C958 0.0047
C974 0.0047
C975 0.0047
C976 0.0047
C977 0.0047
C978 0.0047
C979 0.0047
SCK
BUS LINE1
BUS LINE2
+15V
+8V
+3R3V
+5V
-12V
+5V
+3R3V
+15V
+8V
-12V
T8V
+5V
+3R3V
+15V
+8V
-12V
-
12V
+15V
T8V
+5V
+3R3V
+15V
+8V
-12V
T8V
SDAT
SST1
SPSO
SST2
DFXS
DFRS
RX1S
DRES
FRWT
DFRT
DX1T
DFXT
DVOX
DAVOX
DSKY
CTFL
EPAD
MUTEI
DSPCK
DSPR
DFRA
DFXA
DX1A
NSQA
VSQA
RTDA
TNDA
DFRB
DX1B
DFXB
NSQB
VSQB
RTDB
TNDB
SYNCIO
METM
METS
C678
220p
C679
0.1
C666
220p
C667
0.1
C650
150p
C651
0.1
C635
0.1
C633
560p
L611
2.2
C634
390p
L606
4.7
C617
560p
C619
0.1
C618
330p
C603
0.1
C601
0.001
L601
3.9
C602
0.001
C663
0.1
C664
330p
L620
2.2
C662
150p
C646
390p
L615
2.2
C648
560p
C647
0.1
C631
0.1
C632
560p
L610
4.7
C630
330p
C615
0.1
C616
0.001
L605
3.9
C614
0.001
C745
120p
C747
0.1
C731
0.1
C729
100p
L641
0.33
C730
15p
C714
18p
L636
0.56
C713
120p
C715
0.1
C699
0.1
C697
180p
L631
R612 270
R614 270
0.68
C698
47p
C682
68p
L626
1
C681
220p
C683
0.1
C759
120p
C758
0.1
C695
0.1
C696
22p
L630
1
C694
68p
C710
47p
L635
0.68
C712
180p
C711
0.1
C727
0.1
C728
120p
L640
0.56
C726
18p
C742
15p
L645
0.33
C744
100p
C743
0.1
TXB6
5
6
7
81
2
3
4
OUT1
II1
IN1
V
-
IN2
II2
OUT2
V+
IC820
PC4094G2
R821
100
C821
0.1
C838
10
C836
5p
R822
33k
R820
1k
R829
470
C817
390p
C818
0.001
R830
120
C820
0.01
C822
0.1
C837
10
R824
C819 5p
R831 22k
100
R823
47
C823
1
C824
0.01
C826
0.012
C827
0.012
L820
27
C825
0.022
C829
0.015
C830
0.015
L821
47
C828
0.01
C832
0.01
C833
0.01
L822
56
C831
0.0033
R827
270
R828
270
C834
1
C835
0.1
R826
18
D820
1SV307
TXB0
TXB0
TXB0
C812
0.01
R808
47k
Q802
2SB1119
R809
1.5k
Q803
DTC114EU
T8V
D801
MA77
L802
100
R802
150
C803
0.1
L803
LR-494
Q801
2SC5551
C804
0.1
R803
1k
R804
2.7k
C806
0.01
C805
0.1
L804
220
C807
0.1
f
(to MAIN unit (3))
(to MAIN unit (3))
R817
0
R805
68
4
5
3
2
1
Q804
UMH11N
6
R801
330
L801
330
C801
0.0047
D802
1SV307
D351
MA2S111
R810
100k
C813
0.0047
C352 0.1
C816
1
R812
270
C815
8p
R818
100
R814
270
R815
100
R813
18
R816
100k
Q805
DTC114EU
TRVSM
TRVSM
TR
VSM
g
C814
1
R811
10k
TX36K
TX36K
h
h
R837
2.2k
R351
100k
R353
10k
R838
3.9k
R839
2.2k
R840
470
R841
68
Q806
2SC4081
Q351
2SK3018
Q352
2SC4081
C846
0.1
C847
10
C351
10
C845
0.1
Q808
DTA114EU
Q809
DTC114EU
MONS
MON
MAIN UNIT (2)
MAIN
UNIT
(1)
MAIN
UNIT
(3)
C569
0.1
FI503
FL-348
L512
LS-484B
R525
2.2k
+8V
+8V
+8V
R825
100
C802
0.1
R806
100
R852
10k
R352
47k
R807
100
-12V
+15V
+15V
-12V
-12V
+15V
+3R3V
+3R3V
+3R3V
+3R3V
T8V
+15V
+15V
+15V
+15V
T8V
+15V
+15V
+15V
+15V
+15V
+15V
T8V
T8V
T8V
T8V
T8V
T8V
T8V
T8V
to LOGIC unit J809
to LOGIC unit J808
MIGV
270
R331
SAMS
MAMS
AFGVM1
AFGVM2
ASTB2
ASTB1
MCK
MDAT
MODVA
MODVB
AAFVB
AAFVA
PHSL2
PHSL1
POCV
DRIV
PHML2
PHML1
AFGVS2
AFGVS1
FANV
SATT
BNDS
BNDM
POCV
DRIV
0.1
C333
0.1
C332
10u
L331
10u
L330
0.1
C331
0.1
C330
150
R330
GND
AO2
AO1
DI
CLK
LD
DO
AO12
AO11
VCC
VDD
AO10
AO9
VSS
AO3
AO4
M62352AGP
IC331
AO5
20
19
18
17
16
15
14
13
12
AO6
11
10
9
8
7
6
5
4
3
AO8
1
AO7
2
GND
AO2
AO1
DI
CLK
LD
DO
AO12
AO11
VCC
VDD
AO10
AO9
AO8
AO7
AO6
AO5
AO4
AO3
VSS
M62352AGP
IC330
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
14.9V
TX : 0V
RX : 14.5V
TX : 14.0V
RX : 0V
TX : 2.90V
RX : 0V
TX : 3.62V
RX : 0V
TX : 13.7V
RX : 0V
TX : 7.95V
RX : 1.2mV
TX : 4.01V
RX : 0V
TX : 0.74V
RX : 0V
TX : 9.72V
RX : 0V
TX : 14.5V
RX : 0V
TX : 10.7V
RX : 0V
1.22V
TX : 4.25V
RX : 0V
14.6V
0.8mV
14.8V
14.6V
range : input impedance
200mV : 100M
2V : 11M
20V,200V,1000V : 10M
MESUREMENT CONDITIONS
voltage at RX(no instrudion)
frequency : 14.1 MHz
mode : J3E(USB)
(TX) : no modulation
SCOPE ATT : 0dB
Digital tester
ANT(RX) : no input
Summary of Contents for IC-7800
Page 1: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 65 VOLTAGE DIAGRAM 67 Dec 2009 ...
Page 79: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 60 VOLTAGE DIAGRAM 64 Feb 2009 ...
Page 157: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Aug 2008 ...
Page 245: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Jul 2008 ...
Page 333: ...THE TRANSCEIVER i7800 SERVICE MANUAL S 14015HZ C1 2 Mar 2006 ...
Page 555: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14015HZ C1 2 C 2004 2006 Icom Inc ...