Icom IC-M412 Service Manual page 28

• MAIN-A UNIT
(BOTTOM VIEW)
TXDET
T5
BPFV
R5V
5V
SQL
R8V
HV
GND
GND
TMUTE
R5
SEND
RCV
SQLV
VBIAS
AF5
TMUTE
CK
VCC
DA STB
UL
DSCENC
BEEP
DSDEC
BPFV
KEYM
• LOGIC-A UNIT
(BOTTOM VIEW)
R74
C44
C51
R71
SP-
SP+
VCC
5V
DETM
C3
C2
IC8
J1
C91
C93 C92
C107 C110 J1
ICF3
C96
C95
C97
X1 R98
C98
C34
C99
C49
R35
R41 DSCENC
IC1
C41
R55
R54
R24
R60 C21
R31
CH16
R32
IC2
CH
R63
DTRS
BE
MENU
IC3
5V
BPFV
ENT
R81
GND
CLR
B7428A
SCAN
VCC
• SQL-A UNIT
• VR-A UNIT
(BOTTOM VIEW)
(BOTTOM VIEW)
H0
B7429A
8 - 2
J3
J3
R86 SP-
C125
R104
D4
R89 R85
SP+
Q4
R102
R84
GND
UP
DOWN
H5 H10