Icom IC-7851 Servise Manual page 156

MAIN UNIT (MAIN-3)
+15V
+11V
+8V
+5V
+3R3V
-8V
-12V
T8V
MAIN-1
MMZ1608S601A
EP721 C721
IC723
0.1
IC721 1
I1
16 1 2
VCC QB I2
15 2 3
QA QC I3
14 3 4
MDAT
SI QD I4
13 4 5
DRESH
G QE I5
MSTB2 12 5 6
RCK QF I6
MCK 11 6 7
SCK QG I7
10 7 8
SCLR QH I8
9 8 9
QH' GND VCC
SN74AHC595PW 62783G
C723
0.1
C722
0.1
IC724
IC722 1
I1
16 1 2
VCC QB I2
15 2 3
QA QC I3
14 3 4
SI QD I4
13 4 5
G QE I5
12 5 6
RCK QF I6
11 6 7
SCK QG I7
10 7 8
SCLR QH I8
9 8 9
QH' GND VCC
SN74AHC595PW 62783G
DSONA
DSAPA
C724
DSONB 0.1
DSAPB
MMZ1608S601A
EP751
C751
IC754
0.1
1
IC751
I1
16 1 2
VCC QB I2
15 2 3
QA QC I3
MDAT 14 3 4
SI QD I4
DRESH 13 4 5
G QE I5
MSTB1 12 5 6
RCK QF I6
MCK 11 6 7
SCK QG I7
10 7 8
SCLR QH I8
9 8 9
QH' GND VCC
SN74AHC595PW 62783G
C752
0.1
IC752
16 1
VCC QB
15 2
QA QC
14 3
SI QD
13 4
G QE
12 5
RCK QF
11 6
SCK QG
10 7
SCLR QH
9 8
QH' GND
SN74AHC595PW
5.1
EP781
MMZ1608S601A
C782 C783
Q781
L2SC4081
0.1 0.1
18 R740 TXB0
O1
17 R741 10 TXB1
O2
16
R742 10 TXB2
O3
15
R743 10 TXB3
O4
14
R744 10 TXB4
O5
13 R745 10 TXB5
O6
12 R746 10 TXB6
O7
11 R747 10 TXB7
O8
10 10
GND
18 R748 TXB8
O1
17 R749 10 TXB9
O2
16 R750 10 TXB10
O3
15 R751 10 TXB11
O4
14 10
O5
13
O6
12
DSONAH
O7
11
DSAPAH
O8
10
DSONBH
GND
DSAPBH
TAMS
UNASBS
HFS
MICS
AAMODS
18
BAMODS
O1
17
UMODS
O2
16
O3
15
O4
14
O5
13
O6
12
O7
11
O8
10 PMIXS
GND
SPMIXS
C754
0.1
MIC8VS
TIFFS
TRVST
MAFS
PHONS
ASPONS
BSPONS
R791
4.7K
Q791
T8V PT8V
4 3
MAIN-1
TRVST
5 2
Q792
6 1 LDTC114EE
DMG564010
PT8V
PT8V
MDAT
MDAT
MCK
MCK
ASTB1
ASTB1
ASTB2
ASTB2
MSTB1
MSTB1
MSTB2
MSTB2
DRESH
DRESH
DSONAH
DSONAH
DSAPAH
DSAPAH
DSONBH
DSONBH
DSAPBH
DSAPBH
DSONB
DSONB
DSAPB
DSAPB
DSONA
DSONA
DSAPA
DSAPA
VDL
VDL
FIDL
FIDL
DIDL
DIDL
ALCL
ALCL
EALC
EALC
PVDL
PVDL
PDIDL
PDIDL
PFIDL
PFIDL
PREFL
PREFL
PFORL
PFORL
MIXAV
MIXAV
MIXBV
MIXBV
BNDAV
BNDAV
BNDBV
BNDBV
FID2V
FID2V
FID1V
FID1V
DIDV
DIDV
9-13
R855 C851
C842 100 2.2 F93
R847 10K
10
8.6 C843
R887 18K
10 CE-LH
C888
560P
Q832
L2SC4081
R886
100K
R851 10K
R850
R856 C852
220K
C849
100 2.2 F93
82P
10
R866 C862
10K
R873
C872
C863 100 2.2 F93
R867
10 CE-LH
47K
C867 R868 C868
2.2 F93 10K 220P
R870
10K
10K
R874
C870 R872 C873
2.2 F93 100 2.2 F93
R871 47K
C871 220P
TXB0
MAFS TXB0
MAFS TXB1
PMIXS TXB1
PMIXS TXB2
SPMIXS TXB2
SPMIXS TXB3
PHONS TXB3
PHONS
TXB4
ASPONS TXB4
ASPONS TXB5
BSPONS TXB5
BSPONS TXB6
TXB6
TXB7
TXB7
TXB8
TXB8
TXB9
TXB9
TXB10
TXB10
TXB11
TXB11
TIFFS
TIFFS
TRVST
TRVST
PT8V
PT8V
UNASBSH
UNASBSH
DRIV
DRIV
ALC
ALC
IC901
1 16
8
Y1 VDD
2 15 V+
Y0 Y
3 14 GND
Z1 X
4 13 4
Z X1
5 12
Z0 X0
6 11
INH A
7 10
VEE B
8 9
VSS C
CD4053B R913 18K
R914 33K
R915 82K
R916 82K
IC902
1 16
Y1 VDD C913
2 15
Y0 Y 10 CE-LH
3 14
Z1 X
4 13
Z X1
5 12
Z0 X0
6 11
A
INH
7 10
VEE B
8 9
VSS C
CD4053B
+8V
C931 R931 C951 R951
0.1
0.1 100
4 4
V+ V+
IC931 IC951
GND GND
NJM2058V NJM2058V
11 C952 11
C932 R932
0.1
100
0.1
R962
DIDL
VDL
FIDL R946 NJM2058V
1k
IC931
2
-0.5
1
R947
3
ALC
C933
R942 220K
R945 1.2K
470P 6
R933 D941 R941 330
7
R944
5
10M
R935 L1SS400
9
IC931
D931
ALCL 8 2.7M NJM2058V
R936
10
L1SS400 IC931
3.3M
NJM2058V
R934
R956
4.7M
220K
R990 10K R999 D991 R958
13
D952 R955
14
120k
L1SS400 R959
12
R998 4.7k L1SS400 100
IC951
R989 NJM2058V
NTCG16
R997 1K
Q995
R996
L2SA1576AR
EALC
1K
D971
R974 3.3M
L1SS400
+8V
UNASBSH 2
1
3
UNASBS IC951
Q993
NJM2058V
Q994
LDTC114EE
LDTA114EE
Q972
LDTA114EE
R970
Q971
KTC2875
1k
*: Refer to the PARTS LIST for the value and name of component.
R919
39K
MAIN-6
2 IC911
C917
1
TAFIN
3
10 CE-LH R923
TS462CPT
0
6 IC911
7
/TAFIN
5
TS462CPT
VOXAF
100
R952 220
TAMS
6
7
5
IC951
100
NJM2058V
9
8
R963
10 PDIDL
IC951
47K
47K NJM2058V
R940
100
13
14
R948
12
PVDL
47K IC931 1M
NJM2058V
PFIDL
ICCV
D953
PREFL
10K R961 L1SS400
D954
68K L1SS400
NTCG16 4LH 223JT
PFORL
R975
100K
R973
100K
R981 R982
POCV
33K 0
Q976 Q977
LDTC114EE LDTC114EE