Board Layouts; Logic, Vr-A And Vr-B Units - Icom IC-M45 Service Manual

SECTION 8

8-1 LOGIC, VR-A AND VR-B UNITS

8-1-1 TOP VIEW
•
LOGIC UNIT
30
J2
1 KEY.M
GND
2
FROM
MICROPHONE
1
•
VR-A UNIT
1
1 5
J2
TO MAIN
UNIT J1

BOARD LAYOUTS

J1
SP+
SP+
SP—
SP—
GND
BEEP
PTT
ICF3
HANG
TXDET
OEX. OE
P. STB
OEX.STB
TONE
S.METER
SQL
PTT. S
UNLK
CK
DATA
DATAM
DATAS
SQLV
BUSY
GND
GND
F. MODE
HVS
NC
5V
TO MAIN
UNIT J4
R1
R33
R31
R32
C19
D2
R34
R2
C5
R1
R16
R17
R15
C8
Q1
R8
IC3
D1
R12
Q2
C7 R5
C17
R10
D3 Q3 R4
C1
•
VR-B UNIT
1 3
J1
TO MAIN
UNIT J1
8 - 1
Q5
C20
R19
C21 Q4
R26 R18
R23 R21
R20
R24
R29
C2
J1
1
R1