Icom IC-7800 Service Manual Addendum page 311

Jul. 2008
LOGIC UNIT (4)
VDD3R3
VDD1R5
BUS LINE1
+15V
RES#
FAN ON: 1.49V
OFF: 20.9mV
R825 Q821
1 2SB1201
FAN
R823 1.2M
Q822
R826
R822 2SC4081
27k
6
1k
7 -
5 D821
+
IC821 MA8047
R827
NJM2904M
27k
VDD5A
VDD5
VDD3R3A
FAN
VDD3R3
C626 0.1
LOGIC
UNIT
IC607
(3) TC7S08F
5 1
2
4 3
to LOGIC unit(2)
FZMD
Explanatory notes
VOLTAGE LINE
RX LINE
MEREF
R854
560k
R851
D857
R855
100k
13 1SS355 4.7k
- 14 MET_M
METM 12
+
IC851
NJM2058M
R853
560k
R852
D858 R856
100k
9 1SS355 4.7k
- 8 MET_S
METS 10
+
IC851
NJM2058M
15.0V
SYS_RES#
BUS LINE6
RES#
+15V +15V
TX: 8.13V
RX: 0.0V
Q803
R802 4.7 2SD1619
T8V
TX: 3.18V
R803 1k RX: 0.0V
R801 10k
RXSB
D801
DA221
Q802
2SC4081
TX: 8.82V
RX: 0.1V
VDD3R3
R818 10
TX: 3.18V
RX: 0.0V
R816 10k
Q810
2SD1664
RXSA
TX: 0.0V
RX: 3.18V
C853 820p
MPLAY
R862
R860 R861
330
3.3k 2.2k
SPLAY
C851 R858 R859
6 MICPLAY
10 1.5k 1.8k - 7
MAIN_AF 5
+
IC852
NJM2058M
MIC
SUB_RX
MAIN_RX
C861 820p
VOX
R875
R873 R874
330
3.3k 2.2k
C859 R871 R872
9
10 - 8
1.5k 1.8k
SUB_AF 10
+
IC852
NJM2058M
C857 820p
13
- 14
12
+ R868
IC852 R866 R867 330
3.3k 2.2k
NJM2058M
C855 R864 R865
2
- 1
10 1.5k 1.8k
MOD 3
+
IC852
NJM2058M
VDD5A
VDD5
VDD3R3A
VDD3R3A
BUS LINE3
VDD3R3 VDD3R3
VDD1R5 VDD1R5
+8V
+15V
VDD3R3
1.92V
+15V +15V
8
IC821
V+
NJM2904M L803 SLF6028T
GND
L804 SLF6028T
4
L806 SLF6028T
R814 1k
R830 R832
22k 22k
L805 SLF6028T
R828
R833
2
10k
1 - 10k R1052 0
3
+
IC821
NJM2904M
R1053 0
R1054 0
VDD5A L807 SLF6028T
VDD5
VDD3R3A L811 10
FAN
VDD3R3 VDD3R3
C627 0.1
IC608
TC7S08F
5 1
2 FZRX
4 3
FZRX FZRX FZRX
FZTX FZTX FZTX
FZTX FZRS FZRS
FZMD FZMD
VDD3R3
R691
47k
JPG4
C628 0.1 JP53
WDTOVF
JRESI JRESI
IC609
JPG5
TC74HC08AF
JPG6
1 14
MICPLAY
2 13
MICREC
3 12
SPLAY
4 11
MPLAY
5 10
RXSREC
6 9
RXMREC
7 8
T401
H1102
1 16
2 15
3 14
FZRS 4 13
JRESI JRESI 5 12
SYS_RES# 6 11
7 10
8 9
+8V +8V
TX: 0.0V
Q806
RX: 7.97V
R807 4.7 2SD1619
SR8V
R808 1k
R8V R440 150
R441 150
R809 10k
R442 150
D803 D804
R443 150
DA221 1SS301
R436 150
Q807
TX: 0.0V
2SC4081 R437 150
RX: 8.19V
R438 150
TX: 0.1V
Q804
RX: 8.82V R439 150
2SD1619
R804 4.7
MR8V
C440 0.001
R805 1k
R806 10k
D
D802
C
DA221
Q805 R428 100
TX: 0.1V
2SC4081 R429 100
RX: 8.82V
VDD3R3 R430 100
T8V T8V R431 100
MPLAY C438 0.1
B
A
SPLAY
R432 100
R433 100
MICPLAY
R434 100
R877 150k R435 100
R878
C865 R876
4.7k
10 560 2 MICREC C439 0.1
1 -
3
+
IC853 R1029
MTXD1
NJM2058M 4.7k
MRXD1#
CISEL
MTXD2
R880 120k
MRXD2#
R881
C867 R879
4.7k
0.0068 8.2k 6 VOXAF
7 - to LOGIC
5
+ unit(1)
R1030
IC853
4.7k
NJM2058M
R883 8.2k CRT_RED
R884
C869 R882
CRT_GREEN
4.7k
10 560 13 RXSREC
14 -
12
+ CRT_BLUE
R1031
IC853
4.7k
NJM2058M CRT_HSYNC
R886 8.2k
CRT_VSYNC
R887
C871 R885
4.7k
10 560 9 RXMREC
8 -
to LOGIC
10
+ unit(2)
R1032
IC853
4.7k
NJM2058M
USB1_5V
USB1_HM
to LOGIC USB1_HP
unit(3)
62
L834 EXCCL3225U C15V
L835 EXCCL3225U
+15V
+8V
+15V +15V
EP821
EP822
VDD3R3
VDD3R3
0.02V
J820
J821 LG_PWR L801 100
GND GND C812 0.001
VDD1R5 -15V L832 EXCCL3225U
VDD3R3 +15V L833 EXCCL3225U +15V
VDD5 +15V
PWRS +15V
C15V +8V L808 EXCCL3225U
GND +5V L809 EXCCL3225U
+3R3V L810 EXCCL3225U
GND C813 0.001
C814 0.001
C815 0.001
J805
VDD5VF L821 EXCCL3225U
NC C827 0.001
GND C828 100p
MSND L827 EXCCL3225U
+8V L822 EXCCL3225U
NC C826 0.001
C15V C829 0.001
C15V C830 100p
C15V L824 EXCCL3225U C15V
J824
GND C831 0.001
FAN
GND C832 100p
FANG
+3R3C L825 EXCCL3225U
LG_RES EP826 LG_RES
NC C833 0.001
LG_PWR EP829 LG_PWR
NC C834 100p
LTXD EP827 LTXD
LRXD EP828 LRXD
GND
GND
CP601 VDD3R3
R811
100
DSPCK R901
SCK R902
DSPR R903
SDAT R904
DFRA R905
SST1 R906
DFXA R907
SPS0 R908
J810 DX1A R909
GND SST2 R910
MICPLAYE NSOA R911
MICPLAY
MICRECE VSQA R912
MICREC DFXS R913
SPLAYE RTDA R914
SPLAY DFRS R915
MPLAYE TNDA R916
MPLAY DX1S R917
RXSRECE DFRB R918
RXSREC DRESL R919
RXMRECE DX1B R920
RXMREC FRWT R921
DFXB R922
DFRT R923
NSQB R924
DX1T R925
VSQB R926
DFXT R927
RTDB R928
DVOX R929
TNDB R930
DAVOX R931
SSYNCIO R989
J802
DSKY R932
TX+
MET_M R933
TX-
CTFL R934
RX+
MET_S R935
NC
EPAD R936
NC
RX-
MUTI R937
NC
NC
GND
EXRL1
EXRL2
TRVI
RTKI
IDL
SENI
VDL
SEND
ALCL
TRAS
THML
T8V
SQSA
MR8V
SQSB
SR8V
SQLSM
J825 RSTBB
MTXD1 SQLSS
MRXD1# RSTBA
GND
CISEL ASTB2
MTXD2
MRXD2# ASTB1
GND
GND MSTB2
SKYS
J803 MSTB1
GND
RED MCK
RGND LED1
GREEN MDAT
GGND LED0
BLUE SPDIF_OUT
BGND SPDIF_IN
HC
SGND CI_V
VSYNC
GND
J804
GND
VBUS1 DULSA
D-1
DULSB
D+1 VOXAF
GND
UNLKA
C15V
+15V
+8V
+5V
+3R3V
-15V
VDD3R3
VDD3R3
IC802
TA78L08F
R819 22
O I
G
T8V
DRESL
FSTB
R1025 100
CSTB
MDAT
R1027 100
4 4 MCK
V+ IC852 V+ IC853
3.15V
NJM2058M NJM2058M
DRESL
GND GND
11 11 ISTA
IKEY
THRI
R1028 100
R850 0
R1026 100
R888 D851
220 1SS355
FORL 7
R812 68
IC851
C15V
NJM2058M
R892 270k
O I
G
R890 D852
1SS355
220
REFL 1
3.15V IC801
IC851
BA033FP
NJM2058M
VDD3R3
MCK
DPSTA
MDAT
R810
Q808 to LOGIC
DRESH
100 DTA114EU unit(3)IC404
LAN_D0
DPSTB
LAN_D1
Q809
DTA114EU
T8V
J808 MR8V
10 DSPK +15V
10 SCK Q901
XP4311
10 DSPR
10 SDAT
10 DFRA 3 4
J806
10 SST1
GND
10 DFXA DSONA 2 5
LCLK DO_CLK
10 SPS0
GND
10 DX1A 1 6
R0 DO_R0
10 SST2
R1 DO_R1
10 NSQA
R2 DO_R2
GND DSAPA
GND
10 VSQA DRESH
R3 DO_R3
10 DFXS DSCLA
R4 DO_R4
10 RTDA DSDAA
R5 DO_R5
10 DFRS MDAT
GND
10 TNDA MCK
G0 DO_G0
10 RX1S DSTBA
G1 DO_G1
10 DFRB
G2 DO_G2
10 DRES
GND
10 DX1B DSCLB
G3 DO_G3
10 FRWT DSDAB
G4 DO_G4
10 DFXB DSTBB
G5 DO_G5
10 DFRT
GND
10 NSQB
B0 DO_B0
10 DX1T +15V
B1 DO_B1
10 VSQB Q903
B2 DO_B2
10 DFXT XP4311
GND
10 RTDB
B3 DO_B3
10 DV0X 3 4
B4 DO_B4
10 TNDB
B5 DO_B5
10 DAVOX DSAPB 2 5
GND
10 SYNCIO
HS FP_HS
10 DSKY 1 6
VS FP_VS
10 METM
DE FP_DE
10 CTFL
UD/RL
10 METS DSONB
GND
10 EPAD R813 MCK
NC
10k
GND MDAT
NC
10 MUTEI OCS
GND
OSS2
GND
OSS1
LVDD4
J822
LVDD3
SPO
LVDD2
SPE
LVDD1
VDD3R3
J823
J807
GND
UNLKB
CD1# EP1101 R1101 47
DRESH
J809 CFD3 EP1102 R1102 47
R938 10 EXRL1 CFD11 EP1103 R1103 47
0.0V
R939 10 FORV CFD4 EP1104 R1104 47
PDAT/CON1
R940 10 EXRL2 CFD12 EP1105 R1105 47
PCK/CON0
R941 10 REFV CFD5 EP1106 R1106 47
R942 10 TRVI CFD13 EP1107 R1107 47
R943 10 FANV CFD6 EP1108 R1108 47
CON2
R944 10 RTKI CFD14 EP1109 R1109 47
R945 10 IDL CFD7 EP1110 R1110 47
PSTB
R946 10 SENI CFD15 EP1111 R1111 47
PSLB
R947 10 VDL CE1# EP1112 R1112 47
R1056 0 SEND CE2# EP1113 R1113 47
R949 10 ALCL CFA10 EP1114 R1114 47
R950 10 ASND VS1# EP1115 R1115 47
R951 10 THML OE# EP1116 R1116 47
T8V
R952 10 T8V IORD# EP1117 R1117 47
R8V
R953 10 SQLAM CFA9 EP1118 R1118 47
R954 10 MR8V IOWR# EP1119 R1119 47
R955 10 SQLAS CFA8 EP1120 R1120 47
R956 10 SR8V WE# EP1121 R1121 47
VDD3R3
R957 10 SQLM CFA7 EP1122 R1122 47
R958 10 RSTBB RDY/BSY# EP1123 R1123 47
R959 10 SQLS CF_VCC
L1101 EXCCL3225U
R960 10 RSTBA CF_VCC
GND CFA6 EP1124 R1124 47
UNLKA
R961 10 ASTB2 CSEL# EP1125 R1125 47
R962 10 DULSA CFA5 EP1126 R1126 47
R963 10 ASTB1 VS2# EP1127 R1127 47
EP1128
R964 10 DULSB CFA4 R1128 47
R965 10 MSTB2 RESET EP1129 R1129 47
R966 10 KEY CFA3 EP1130 R1130 47
R967 10 MSTB1 WAIT# EP1131 R1131 47
GND CFA2 EP1132 R1132 47
R968 10 MCK INPACK# EP1133 R1133 47
EP1134
R969 10 LED1 CFA1 R1134 47
PSTA
R970 10 MDAT REG# EP1135 R1135 47
PSLA
R971 10 LED0 CFA0 EP1136 R1136 47
VOXAFE BVD2 EP1137 R1137 47
EP1138
VOXAF CFD0 R1138 47
CIVE BVD1 EP1139 R1139 47
IC854 MESUREMENT CONDITIONS
CIV CFD1 EP1140 R1140 47 voltage at RX(no instruction)
TC7W04F
CFD8 EP1141 R1141 47 frequency: 14.1 MHz
R974
mode: J3E(USB)
10 CFD2 EP1142 R1142 47 8 1
ANT(RX): no input
J826 CFD9 EP1143 R1143 47 UNLKB 7 2
EP972
SPDO WP EP1144 R1144 47 6 3
SCOPE ATT: 0dB
GND CFD10 EP1145 R1145 47 UNLKA 5 4
Digital tester
EP973
SPDI CD2# EP1146 R1146 47 range: input impedance
200mV: 100M
GND GND
2V: 11M
20V,200V,1000V: 10M
C15V
+15V
4
IC851
+8V V+
NJM2058M
+5V
+3R3V GND
-15V 11
J811
L901 EXCCL3225U +15V
+15V
+15V
GND
GND
+15V GND
-15V L902 EXCCL3225U -15V
L903 EXCCL3225U +3R3V
L904 EXCCL3225U T8V
R975 10 FORV
R976 10 REFV
GND
R1024 10
TOE
R977 10 FSTB
R978 10 CSTB
R979 10 TDAT
R980 10 TCK
GND
R981 10 TDRS
GNDL
R982 10 ISTA
R983 10 IKEY
R996 10 THRI
GND
R893
100k
6
-
5
+
R894
10
R895
100k
2
-
3
+
R896
J812
10
GND
MCK R984 10 BPCKA
DPSTA R985 10 BPSTA
MDAT R986 10 BPDAT
DRESH R987 10 BPOE
DPSTB R988 10 BPSTB
NC
+15V L905 EXCCL3225U +15V
+3R3V L906 EXCCL3225U VDD3R3
T8V L907 EXCCL3225U T8V
MR8V L908 EXCCL3225U MR8V
GND
Q902
XP4311
3 4
2 5
1 6 J813
GND
NC
+3R3V L909 100 +3R3V
R990 1k DRESH
R991 1k DSCLA
R992 1k DSDAA
R993 1k DDAT
R994 1k DCK
R995 1k DSTBA
EP996 DSONA
EP997 DSAPA
R998 1k DSCLB
R999 1k DSDAB
R1000 1k DSTBB
EP1001 DSONB
EP1002 DSAPB
+15V
Q904 +15V
L910
XP4311 NC
EXCCL3225U
GND
3 4
2 5
1 6
J814
GND
R1003 10 OCK
R1004 10 ODAT
R1005 10 OCS
R1006 10 OSS2
R1007 10 OSS1
+8V L911 EXCCL3225U P+8V
C15V L912 EXCCL3225U P+15V
P+15V
GND
J815
GND
R1008 10 UNLKB
R1009 10 DRES
GND
GND
R1010 10 PDATB
R1011 10 PCKB
GND
GND
R1012 10 C2B1
R1013 10 C2B2
R1014 10 PSTB
R1015 10 PSLB
GND
GND
L913 EXCCL3225U P+5V
P+5V
L914 EXCCL3225U T8V
L915 EXCCL3225U R8V
L916 EXCCL3225U P+15V
P+15V
GND
J816
GND
R1016 10 UNLKA
DRESH R1017 10 DRES
GND
GND
PDAT/CON1 R1018 10 PDATA
PCK/CON0 R1019 10 PCKA
GND
GND
CON2 R1020 10 C2A1
R1021 10 C2A2
R1022 10 PSTA
R1023 10 PSLA
GND
GND
+5V L917 EXCCL3225U P+5V
P+5V
T8V L918 EXCCL3225U T8V
R8V L919 EXCCL3225U R8V
+15V L920 EXCCL3225U P+15V
(TX): no modulation
P+15V
GND