Voltage Diagram - Icom IC-M85 Service Manual

SECTION 9

VOLTAGE DIAGRAM

• FRONT UNIT
VCC
To MAIN UNIT (1/2)
J1
VCC
24
AFO AFO
23
VOXV VOXV
22
GND
21
MCIN MICIN
20
MICE MICE
19
OPTV OPTV
18
CPU5V CPU5V
17
LCDINH LCDINH
16
LCDDATA LCDDATA
15
LCDCK LCDCK
14
LCDMD LCDMD
13
LCDE LCDCE
12
SDATAO SDATAO
11
SCKO SCKO
10
ESTB ESTB
9
EXOE EXOE
8
CLORXD CLORXD
7
CLOTXD
CLOTXD
6
AFVS AFVS
5
ADKEY2 ADKEY2
4
ADKEY1 ADKEY1
3
IPTT IPTT
2
EPTT EPTT
1
LCD
J2
SEG19
1
SEG18
2
SEG17 COM1
3
SEG16 COM2
4
SEG15 COM3
5
SEG14 COM4
6
SEG13 SEG1
7
SEG12 SEG2
8
SEG11 SEG3
9
SEG10 SEG4
10
SEG9 SEG5
11
SEG6
SEG8
12
SEG7
13
SEG7 SEG8
14
SEG9
15
SEG6 SEG10
16
SEG11
17
SEG5 SEG12
18
19
SEG4
20
SEG3
21
SEG2
22
SEG1
23
COM4
24
25
COM3
26
27
COM2
28
29
COM1
30
31
While receiving a signal, or the squelch is open: 5.0 V
LED
CPU5V
DS1
CL-505S
B R G
Q1
R1 DTC014YEB
LEDG While Transmitting: 5.0 V
2.2k
R2
LEDR
4 3
1.2k
2
R3
LEDB
5 1 ADKEY2
1.2k
Q2
DMC561040
[KEY LOCK] While submerged: 5.0 V
S1
EVQ-PUL
PTT/SIDE SW
J3
IPTT
1
2
3
4
R134
100k
R133
DTC014YEB
R136
100k
LCDS
22k
Q12
1 48
COM1 SEG44
2 47
COM2 SEG43
3
46
COM3 SEG42
4 45
COM4 SEG41
5 44
SEG1 SEG40
6 43
SEG2 SEG39
7 42
SEG3 SEG38
8
IC9 41
SEG4 SEG37
9 NJU6434KS4 40
SEG5 SEG36
10 39
SEG6 SEG35
11
38
SEG7 SEG34
12 37
SEG8 SEG33
13 36
SEG9 SEG32
14 35
SEG10 SEG31
15 34
SEG11 SEG30
16 33
SEG12 SEG29
MP7
[16] [CH/WX] [SCAN] [FAV]
KEY LIGHT LCD LIGHT
IC2
1 16
STR V+
2
15
D OE
3 14
CLK Q5
4 13
Q1 Q6 R11 Q3
5
12
Q2 Q7
6 11
82
Q3 Q8
7 10 DTC014YEB
Q4 Q'S
8 9
GND QS
MC74HC4094ADTR2G
VCC
7.2 V
5.0 V
When an external speaker is:
connected:
R126
not connected: 4.7 V
10k
IC4
6 DA2S10100L
D8
7
C96
5
NJU7057RB1
0.018
CPU5V
R36 R35
150k 150k
R121
MICIN
IC4
2
0
1
3
NJU7057RB1
MICE
ADKEY1
Q9 Q11
CLORXD
DTC014YEB
DTC014YEB
DTC014YEB
Q10 R39
47
CLOTXD
Explanatory notes
TX Line
RX Line
BKLIT
Voltage Line
LCD Backlight
ON: 5.0 V
OFF: 0 V
9-1
VCC
RSQ035P03TR
Q6
3.9 V
R23
330
R20 R22
330k
33k
IC8
1 8
COM VCC J4
7
2 IC6
INH CH0
3 6 1 8
VEE CH1 IN VO– 1
4 5 2 7
2
GND A SHUTDOWN GND
3 6
VDD SE/BTL
4 5
TC7W53FK
BYPASS VO+
TPA0211DGN
0 V
IC5
C61
1 8 SP-
IN VO–
2 7
220
SHUTDOWN GND
3 6
VDD SE/BTL C62
4 5 SP+
BYPASS VO+
220
TPA0211DGN
When an external speaker is:
connected: 4.7 V
not connected: 0 V
F6027AP
IC7 MC1
C64
R50
1 8
COM VCC
2 7
10k
INH CH0 0.1
3 6
VEE CH1
8
4 5
GND A
V+ IC4
GND TC7W53FK
4
R56
EPTT
470
R57
OPTV
1k
*Refer to the PARTS LIST for the value and name of component.
MICE
14PIN CONNECTOR
J5
1 PTT
2 MIC
3 CLOTXD
4 CLORXD
5 RESE T
6 MICE
MMZ1005Y102CT
7 OPTV
EP6
8 VCC
9 AFO+
10 AFO-
11 GND
12 CTS
13 RTS
14 OPF
15 GND