Voltage Diagram - Icom HM-151 Service Manual

SECTION 4

VOLTAGE DIAGRAM

MAIN UNIT (For [GEN], [GEN-1])
R5
D1
J1
L1
M8V
1
MU/D
2
M8VSW
3
PTT EP5
4
MICE EP2
5
MIC
EP3
6
E
7
EP4
MDATA
8
C21 C19 C16
C18
C22 EP1 D18
C17
C30
MC1
R40
D16
C31
MODE FIL GENE F-INP
ENT
S10
S9 S11 S12
UP XFC 7 18 28 430
(3) (6) (9) (CE)
S7 S6 S13 S14 S16
S15
TUNER/
CALL
MW 3.5 14 24 144
(2) (5) (8) (0) F-1
S3 S5 S17 S18 S19 S20
PTT SPCH/
V/M LOCK 1.8 10 21 50
(1) (4) (7) (.) F-2
S2 S4 S21 S22 S23 S24
Q1
R37 R8
R7
Q2
C9
C11
C5
C10
R39
D12
MKEY-07
MKEY-06
MKEY-05
MKEY-04
MKEY-03
MKEY-02
MKEY-01
MKEY-00
R22
MKEY-I0
DN
S8
R23
MKEY-I1
C13
R24
MKEY-I2
S25
X1
J2
1
R25
1
MKEY-I3 2
2
S26 3
3
4
4
5
5
6 IC3
6 R27
1 5
VOUT CT
2
VDD
3 4
GND NC
*Refer to "PARTS LIST" for component name or value.
4 - 1
MAIN-A UNIT (For [GEN-02], [EXP])
J1
M8V
1
MU/D
2
M8VSW
3
PTT
C12 4
MICE
5
MIC
6
E
7
MDATA
R6 8
Q3
C21
C22
Q5
MODE
UP XFC 7
(3)
S7 S6 S13
R18
TUNER/
MW CALL 3.5
R19
(2)
PTT S3 S5
S17
SPCH/
V/M LOCK 1.8
(1)
S2 S4
Q1
R5
D1
L1
EP5
EP2
EP3
EP4
C9
C19 C18 C16 C11
C5
C10
EP1 D18 C17
C30
MC1
R40 R39
D16
C31
FIL GENE F-INP
ENT
R22
MKEY-I0
S9 S10 S11 S12
18 28 430
(9)
(6) (CE) DN
S14 S16 S8
S15
R23
MKEY-I1
14 24 144
(5) (8) (0) F-1
R24
MKEY-I2
S18 S20
S19 S25
10 21 50
(4) (7) (.) F-2
R25
MKEY-I3
S21 S22 S23 S24 S26
C12
R37 R8 R6
R7
Q3
Q2
Q5
D12
MKEY-07
MKEY-06
MKEY-05
MKEY-04
MKEY-03
MKEY-00
MKEY-01
R18
R19
C13
X1
J2
1
1
2
2
3
3
4
4
5
5
6
IC3
6
R27
1 5
VOUT CT
2
VDD
3 4
GND NC
*Refer to "PARTS LIST" for component name or value.