Icom IC-M302 - 11-5 HM-141; HM-141 Voltage Diagram

11-5 HM–141
UP ON 2.0V
DN ON 3.0V
16/9 ON 3.8V
1
1
2
2
3
3
4
4
5
5
PTT
MICG
MIC
GND
KEYM
CHASSIS UNIT W1
MC1
KUC3523–040245
C1
0.022
C2
470 P
R1
12 k
W3
W4
S1
SKHHLPA010
W2
W1
R2
6.8 k
S4
SKHHLPA010
R3
15 k
R4
33 k
S2
SKHHLPA010
S3
SKHHLPA010
UP
DOWN
H/L
PTT
MIC
11 - 5