Icom IC-M85

SECTION 9 VOLTAGE DIAGRAM
9-1
TX Line
RX Line
Voltage Line
Explanatory notes
SP-
To MAIN UNIT (1/2)
LCD
[FAV][CH/WX] [SCAN]
LED
[KEY LOCK]
PTT/SIDE SW
LCD LIGHTKEY LIGHT
CLOTXD
RTS
MIC
VCC
PTT
OPF
AFO+
GND
OPTV
CLORXD
RESE T
AFO-
MICE
CTS
SP+
AFO
EPTT
IPTT
VOXV
CPU5V
VCC
MICE
VCC
AFO
ESTB
CLORXD
LCDMD
LCDE
ADKEY1
AFVS
LCDCK
ADKEY2
EXOE
LCDINH
CLOTXD
OPTV
MICE
MCIN
VCC
GND
[16]
GND
LCDDATA
SDATAO
SCKO
0.001
C31
0.1
C30
EVQ-PUL
S1
DTC014YEB
Q10
DTC014YEB
Q9
DTC014YEB
Q11
NSSW208
DS4
NSSW208
DS5
270
R14
270
R18
B1931TX
DS2
B1931TX
DS3
390
R7
390
R9
0.1
C25
J5
14PIN CONNECTOR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1617
0.001
C41
100 R45
0.1
C42
PRG21BC4R7MM1RA
R60
0.001
C69
10k
R59
0.001
C68
2.2k
R54
33k
R58
F6027AP
MC1
TC7W53FK
IC7
1
COM
2
INH
3
VEE
4
GND
5
A
6
CH1
7
CH0
8
VCC
0.001
C54
RCLAMP1521P
D1
4.7
C48
0.01
C49
TPA0211DGN
IC5
1
IN
2
SHUTDOWN
3
VDD
4
BYPASS
5
VO+
6
SE/BTL
7
GND
8
VO–
9
0
R62
10
C34
R63
EZAEG1N50AC
R69
EZAEG1N50AC
R70
EZAEG1N50AC
R71
EZAEG1N50AC
R73
EZAEG1N50AC
R72
EZAEG1N50AC
R77
EZAEG1N50AC
R78
EZAEG1N50AC
R79
EZAEG1N50AC
47P
C81
47PC80 47P
C79
47P
C77
47PC76 47P
C72
MMZ1005Y102CT
EP6
47P
C5
47P
C2
0.001
C8
0.1
C46
10k
R53
47k
R55
1k
R57
47k
R41
47k
R37
47k
R40
47
R39
OG-301012
MP1
OG-301012
MP3
47P
C6
47P
C1
47PC14
MMZ1005Y102CT
EP5
J4
1
2
34
RSQ035P03TR
Q6
1 2 3
4 5 6
KTC811U Q5
1 2 3
4 5 6
270k
R24
1k
R25
330
R23
330k
R22
L1SS400
D7
10k
R30
330
R28
1
C28
0.068
C53
0.068
C50
TPA0211DGN
IC6
1
IN
2
SHUTDOWN
3
VDD
4
BYPASS
5
VO+
6
SE/BTL
7
GND
8
VO–
9
DMC561040
Q2
1
2
34
5
100k
R112
100k
R114
22k
R118
56k
R117
56k
R113
180k
R116
180k
R111
820k
R115
820k
R110
47P
C100
47P
C101
47P
C102
47P
C103
47P
C105
47P
C106
47P
C107
47P
C104
47P
C108
MC74HC4094ADTR2G
IC2
1
STR
2
D
3
CLK
4
Q1
5
Q2
6
Q3
7
Q4
8
GND
9
QS
10
Q’S
11
Q8
12
Q7
13
Q6
14
Q5
15
OE
16
V+
0.001
C20
TC7W53FK
IC8
1
COM
2
INH
3
VEE
4
GND
5
A
6
CH1
7
CH0
8
VCC
NJU6434KS4
IC9
1
COM1
2
COM2
3
COM3
4
COM4
5
SEG1
6
SEG2
7
SEG3
8
SEG4
9
SEG5
10
SEG6
11
SEG7
12
SEG8
13
SEG9
14
SEG10
15
SEG11
16
SEG12
17
SEG13
18
SEG14
19
SEG15
20
SEG16
21
SEG17
22
SEG18
23
SEG19
24
SEG20
25
SEG21
26
SEG22
27
SEG23
28
SEG24
29
SEG25
30
SEG26
31
SEG27
32
SEG28
33
SEG29
34
SEG30
35
SEG31
36
SEG32
37
SEG33
38
SEG34
39
SEG35
40
SEG36
41
SEG37
42
SEG38
43
SEG39
44
SEG40
45
SEG41
46
SEG42
47
SEG43
48
SEG44
49
SEG45
50
SEG46
51
SEG47
52
SEG48
53
SEG49
54
SEG50
55
VLCD0
56
INHb
57
SCL
58
DATA
59
CE
60
MODE
61
VSS
62
OSC1
63
OSC2
64
VDD
J1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25 26
0.1
C109
4.7
C110
10k
R130
22k
R131
680k
R132
100k
R134
100k
R133
IC4
V+
8
GND
4
NJU7057RB1
IC4
2
3
1
NJU7057RB1
IC4
6
5
7
0.018
C95
0.018
C96
470P
C97
470P
C98
15k
R123
330k
R124
2.7k
R125
10k
R126
1M
R127
DA2S10100L
D8
DTC014YEB
Q3
DTC014YEB
Q1
1.2k
R3
1.2k
R2
2.2k
R1
CL-505S
DS1
0.001
C10
82
R11
0.001
C55
DTC014YEB
Q12
22k
R136
470
R56
LS17C2
S2
LS17C2
S3
LS17C2
S4
LS17C2
S5
J3
1
2
3
4
56
J2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
3233
0
R29
220
C61
220
C62
4.7k
R128
33k
R20
100k
R21
10k
R50
10k
R51
47P
C43
22k
R129
150k
R36
150k
R35
100k
R42
100k
R43
0
R121
0.1
C65
0.1
C64
1.2M
R44
MP7
1 2
IPTT
EPTT
OPTV
CLOTXD
CLORXD
BKLIT
MICON BKLIT LEDG LEDR SCKO SDATAO ESTB INTSP EXTSP EXOE
ADKEY1
MICON
EXTSP INTSP
VCC
MICIN
MICE
OPTV
LCDINH
LCDDATA
LCDCK
LCDMD
LCDCE
SDATAO
SCKO
ESTB
EXOE
CLORXD
CLOTXD
ADKEY2
ADKEY1
EPTT
IPTT
LCDMD
LCDCE
LCDDATA
LCDCK
LCDINH
COM1
COM2
COM3
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19
MICIN
VOXV
VOXV
ADKEY2
LEDB
LEDR
LEDG
LEDB
AFVS
CPU5V
CPU5V
CPU5V
LCDS
LCDS
COM4
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
COM4
COM3
COM2
COM1
AFVS
MICE
B RG
3.9 V
5.0 V
7.2 V
While Transmitting: 5.0 V
While receiving a signal, or the squelch is open: 5.0 V
While submerged: 5.0 V
LCD Backlight
ON: 5.0 V
OFF: 0 V
When an external speaker is:
connected: 0 V
not connected: 4.7 V
When an external speaker is:
connected: 4.7 V
not connected: 0 V
• FRONT UNIT
*Refer to the PARTS LIST for the value and name of component.