Icom IC-7300 Service Manual page 66

• MAIN UNIT (MAIN-4)
SPDI
C955
J901
SPDO
1 2 100P
SPCK
3 4
SPCS
5 6
7 8
9 10
C902 47 F93
C903 47 F93
R901
C905
1M
0.1 133
134
X901 135
CR-1021
136
137
C915
138
0.1
139
140
C916 141
0.01
142
143
144
R902
DRESD 145
C906 146
1K
147
0.1
148
149
C907 150
0.1 151
152
C908
153
154
0.1
155
C909 156
0.1 157
C910 158
0.1 159
160
C911
DSPCK R905 0.1 161
DCSX R906 22 162
22 C912 163
164
0.1
DCSR R907 165
22 166
167
0.1
C913 168
169
170
C914
171
172
0.1
173
174
DSPR R908
22
DSPX R909 175
22
176
177
R912 4.7K
R913 18K
R914 4.7K
R915 4.7K
R916 18K
R917 4.7K
TX signal
RX signal
47 F93
IC901
TMS320C6745DPTPA3
R927
22 IC902
1 8
CS VCC
2 7
DO(DQ1) HOLD(DQ3)
3 6
R929
WP(DQ2) CLK
4 5
R930
VSS DI(DQ0)
R926
EN25QH32A
47K
10-5
C936
C937
47 F93
MCLK
FRM
FPX_AGC
BCLK
CP901
SHORT
CP902
SHORT
88 C940
87
0.1
86
85
84
83
82 C941
81
0.1 MCLK
80
FRM
79 FPX_DET
78 C942 BCLK
77 0.1
76 C943
75 0.1
74
73
72 C944
71 0.1
70 C945
69 0.1
68 C946
67
0.1
66 C947
65 0.1
64
63
62 C948
61
0.1
60 C949
59 0.1
58
57 C950
56 0.1
55
54 C951
53 0.1
52
51 C952
50 0.1
49
48
C953
47
0.1
46
45
R1001
/FPCAL
MCLK
FPR_MOD
BCLK
R1002
FRM
FPX_AGC
FPX_DET
FPR_MOD
MCLK
BCLK
FRM
R932 1K BCLK__
R933 18K FRM__
/FPCAL
R935 1K DFR_MOD
DFX_DET
DFX_AGC
/CAL
CFG
STAT
FPRES
DONE
C938
SPDO
0.1 SPCK
SPCK RSSI
22 SPDI
22
AD5V
NJM2904CRB1
C976
R971
R972 R978
100K 39K
IC972
IC971 6
R976
22 16 1 7
SCK BCK
R973
15 2 5
FMT DATA
100
14 3
MUTE LRCK 100K NJM2904CRB1
13 4
DEMP DGND
12 5
TEST NC
11 6
C971 ZEROA VCC
10 7
VCOM VOUTL R974 R979
10 9 8
AGND VOUTR
100K 100K
PCM1754DBQ
IC972
2
R977
1
R975
3
100
NJM2904CRB1
100K
C994
10
R992
5V
100
IC992
TS462CPT
4.7K
R991
R993 R995
820
IC991
22 16 1
SCK BCK
15 2
FMT DATA
14 3
MUTE LRCK
13 4
DEMP DGND
12 5
TEST NC
11 6
C991 ZEROA VCC 12K
10 7
VCOM VOUTL R994 R996
10 9 8
AGND VOUTR
3.9K
PCM1754DBQ
AD5V
C1013
R1011
8
R1008
C1011
V+ 1
GND
2.2 12K
4 IC1002
TS462CPT
IC1002
TS462CPT
IC1001 R1010
20 1 10K
MODE1 VINL
19 2
MODE0 VINR
18 3 R1005
FMT1 VREF1
17 4
18K
FMT0 VREF2
16 5 R1006 IC1003
OSR VCC
15 6 18K 1
SCKI AGND COM
14 7 2
VDD PDWN INH
13 8 C1015 3
DGND BYPAS VEE
12 9 10 4
DOUT FSYNC GND
11 10
BCK LRCK
22
PCM1802DBR
22
C1012 120P
R1012
IC1002
R1009
FPX_AGC C1010
7
FPX_DET
FPR_MOD 2.2 1.2K
MCLK TS462CPT
BCLK
FRM
DR_RSV
DR_RSV
BCLK__
DX_FMT
DX_FMT
FRM__
DR_AF
DR_AF
/FPCAL
DX_REC
DX_REC
DFR_MOD
HSK0
HSK0
DFX_DET
HSK1
HSK1
DFX_AGC
RTD
RTD
/CAL
FRWT
FRWT
CFG
DRESD
DRESD
STAT
DSPCK
DSPCK
FPRES
DCSX
DCSX
DONE
DCSR
DCSR
SPDO
DSPR
DSPR
SPCK
DSPX
DSPX
RSSI
MAIN-2
MAIN-6
14V
8V
3R3V
1R2V
UMODS
MAIN-1
IC961
5 1
VOUT VIN
2
VSS
4 3
NC CE
XC6209F502MR
IC972
100
14V
R982
0.1
Q971
L2SC4081
R980 CP06S
CP971
10K
Q972
L2SC4081
R981 MAIN-6
AGCV
10K
6
IC992
R999 C1001
7
5
10
100
TS462CPT
AAF
DETAF
MAIN-3
2 IC992
R1000
C1002
1
3
10
100
TS462CPT
EP1003
MPZ1608S601A
220P
15K
R1013
2
10K
3
MAIN-5
3R3VA
C1014
0.1
8
VCC
7 R1019
CH0 UMOD
6 R1020 18K
CH1 AMOD
5
0
A
TC7W53FK
Q1001
LDTC143ZE
R1022
MAIN-3
220
68K
R1015 C1016
6
MICI
4.7K
2.2 CP1001
5
MICE
SHORT1005