Icom IC-M803 Service Manual page 73

• MAIN UNIT (5/9)
MAIN UNIT(2/9) H3R3V
R5071 USB_VBUS
4.7K
J5071
FI5071
1 4
USB_DP
2 3
2 3 USB_DM
1 4
EXC24CF900
D5071
EP5071
RCLAMP7524T
MMZ1005B601C
H3R3V
R5085 RTCIRQ
2SA1162
R5086 47k RTCCK
Q5081
R5087 10k RTCDT
47K IC5081
1 22
GND NC
2 21
CE1 NC
3 20
CE0 NC
4 19
DI NC
5 18
DO NC
6 17
CLK NC
7 /TIRQ 16
NC
J5081 8 /AIRQ 15
NC
9 14
FOE NC
10
FOUT
Q5082 11
VDD
L2SC4081
RX-4581
RTCCE
NRST
LTXD
LRXD
MAIN UNIT(1/9)
DNMEAI
GTX
GRX
GRESL
MAIN UNIT(2/9) HV
MMZ1608Y102BT
EP4941
HV
1
2
BOOT R4944
3
RWTXD R4945 220
4
Flash Writer
RWRXD R4946 220
5
A5V 220
6
EP4942
7
MMZ1608Y102BT
J4941
JTMS/SWDIO
JTDI
NRST
JTDO
J4951
NJTRST
1 2
3 4
JTAG JTCK/SWCLK
5 6
7 8
H3R3V
R4962
A1
0
R4963
A2
0
R4964
Explanatory notes
A3
0
TX Line
R4965
A4
0
RX Line
R4966
A5
0
Voltage Line
R4972
A11
0
Measuring condition:
(unless otherwise noted)
• Frequency: 12.23 MHz
• Mode: J3E (USB)
• RX: No signal is received.
• TX: No modulation signal is applied.
• Waveforms are measured by
an oscilloscope.
Voltage notation:
TX
Unit: Volt
RX
RX
H3R3V
0.1
2.2 F93
C4919
C4920
H3R3V
3.3
0.1
C4901
PI2
DMODS 133
PI3
134
VSS
135
VDD
JTCK/SWCLK 136
PA14
JTDI 137
PA15
138
PC10
139
PC11
140
PC12
141
RXPC
PD0
DDECD 142
PD1
143
PD2
SLFS 144
PD3
145
PD4
146
PD5
0.1 147
VSS
148
C4902
VDD
149
PD6
150
PD7
151
A9 IC4901
PG9
152
A10
PG10 STM32F429IGT6
A11 153
PG11
A12 154
PG12
A13 155
PG13
DTRM 156
PG14
157
VSS
158
VDD
159
PG15
JTDO 160
PB3
NJTRST 161
PB4
162
PB5
0.1 163
PB6
164
C4903
PB7
165
BOOT0
166
PB8
167
PB9
168
PE0
169
PE1
170
PDR_ON
171
VDD
AMODS 172
PI4
MMODS 173
PI5
174
AFONS
PI6
175
PI7
176
0.1
C4904
C4906
0.1
NMRS
DRESL
IC4902
1 16
G1 VCC
2 15
1A
G2
3 14
1Y 6A
4 13
2A 6Y
5 12
2Y 5A
6 11
3A 5Y
7 10 R4909
3Y 4A
8 9 220
GND 4Y
SN74AHCT367PWR
R4910
220
H3R3V
DPOFS
PH11
88 HPOFS
PH10
87 DPONS
PH9
86
HPONS
PH8
85
PH7
84
PH6
83 C4912
VDD
VCAP_1 82 0.1
81
RNMEAI
PB11
80
PB10
79
PE15
78
PE14
77
PE13
76
PE12
75
DSTB
PE11
74
PE10
73
VDD
72
VSS
71 KEYIN
PE9
70
PE8
69
PE7
68 A1
PG1
67 A0
PG0
66 C4910
PF15
65 0.1
PF14
64 RSP_SI
PF13
63
VDD 22
62
VSS R4994
61 RSP_SO
PF12
60 RSP_STB
PF11
59 R4995
PB2
58 22
EDT
PB1
57 ECK
PB0
56 REFL
PC5
55 FORL
PC4
54
PA7
53
PA6
52
PA5
51 HENCD
PA4
50
VDD
ASS_REG 49 C4909
48 0.1
PA3
47
RXS
PH5
46 TXS
PH4
45
H3R3V
CR-1084
X4921
102 ns (9.8304 MHz)
1 Vp-p
HV
A5V
11-7
DCSYNCS
PWRSR
TXS
RXS
NASBS
RPPS
MMODS
DA3R3V
SLFS
HPOFS
HPONS
H3R3V
DPOFS
DPONS
AFONS
H3R3V
SCEN
SCEN
RBT_CFG
RBT_CFG
RBT_ST MAIN UNIT(6/9)
RBT_ST
RBT_BT
RBT_BT
HDECD
TCON
HDECD
DDECD
ESTA
DDECD
HENCD
EKEY
HENCD
HSK1
HSK1
MAIN UNIT(7/9)
DRESD KEYIN
DRESD
RSP_CK TRAS
RSP_CK
RSP_STB ASENI
RSP_STB
RSP_SO
RSP_SO
AMODS
RSP_SI
RSP_SI
DMODS
R5035
DSENI
1K
LDTC143ZE
Q5041
H3R3V
RBT_CS
RBT_CS
RBT_CK
RNMEAI
RBT_CK
RBT_DO MAIN UNIT(6/9) RNMEAO
RBT_DO
RBT_DI RXPC
RBT_DI
DTRM
H3R3V C5001 NMRS
0.1
IC5001
8 1
VCC A0
7 2
WP A1
6 3 DRESL
SCL A2
5 4
SDA GND
FILSTB
GT24C256A MDAT
MCK
HV
IC5011
1 5
OUT CD
2
VDD
3 4
VSS NC
S-80942CNMC
THML
THML
ANTCL
ANTCL
VDL
VDL
FIDL
FIDL MAIN UNIT(1/9)
DIDL
DIDL
FORL
FORL
REFL
REFL
ALCL
ALCL MAIN UNIT(9/9)
DRIV MAIN UNIT(3/9)
PDIDV
DID2V
DID1V
FID4V
IC5051 MAIN UNIT(1/9)
FID3V
1 20
VrefL GND FID2V
2 19
Ao3 Ao2 FID1V
3 18
Ao4 Ao1
4 17
FANV
Ao5 DI
5 16
Ao6 CLK
MAIN UNIT(7/9)
6 15 REFV
Ao7 LD
7 14
Ao8 Do
POCV
8 13
MAIN UNIT(9/9)
Ao9 Ao12
ICCV
9 12
Ao10 Ao11
10 11
VrefU Vcc A5V MAIN UNIT(2/9)
R2A20169SA
A5V
DCSYNCS
MAIN UNIT(2/9)
PWRSR
TXS
MAIN UNIT(3/9)
RXS
NASBS MAIN UNIT(9/9)
MAIN UNIT(1/9)
RPPS
MMODS MAIN UNIT(8/9)
SLFS
HPOFS
MAIN UNIT(3/9)
HPONS
DPOFS
MAIN UNIT(4/9)
DPONS
AFONS MAIN UNIT(8/9)
R5047
8V MAIN UNIT(2/9)
4.7k
TCON
ESTA
R5048
EKEY
DSEN MAIN UNIT(1/9)
33k
KEYIN
TRAS
ASENI
AMODS
MAIN UNIT(8/9)
DMODS
2
0
L2SC4081
Q5042
RNMEAI
RNMEAO
RXPC MAIN UNIT(1/9)
DTRM
NMRS
R5046
47K
C5061
IC5061
1 16
STR V+ 0.1
2 15
D OE
3 14
CLK Q5 L5S
4 Q1 13
Q6 L6S
5 Q2 12
Q7
L7S
6 Q3 11
Q8
L8S
7 Q4 10
Q'S
8 9
GND QS
MAIN UNIT(1/9)
MC74HC4094ADTR2G
L4S
L3S
L2S
L1S
C5062
IC5062
1 16
STR V+
0.1
2 15
D OE
3 14
CLK Q5 HB2S
4 Q1 13
Q6 HB3S
5 Q2 12 MAIN UNIT(3/9)
Q7 HB4S
6 Q3 11
Q8 HB5S
7 Q4 10
Q'S
HB1S
8 9
QS
GND
MC74HC4094ADTR2G
L10S
MAIN UNIT(1/9)
L9S
C5063
IC5063
1 16
STR V+ 0.1
2 15
D OE
3 14
CLK Q5
4 Q1 13
Q6
5 Q2 12
Q7
6 Q3 11
Q8
7 Q4 10
Q'S
8 9
GND QS
MC74HC4094ADTR2G
HB9S
HB8S
MAIN UNIT(3/9)
HB7S
HB6S
C5064
IC5064
1 16
STR V+ 0.1
2 15
D OE
3 14
CLK Q5 DB5S
4 Q1 13
Q6
DB6S
5 Q2 12
Q7
DB4S
6 Q3 11 MAIN UNIT(4/9)
Q8
DB3S
7 Q4 10
Q'S DB2S
8 9
GND QS DB1S
MC74HC4094ADTR2G
A5V