Icom HM-169 - Page 11

6 - 1
SECTION 6 BLOCK DIAGRAMS
1
2
3
4
5
6
7
8
MIC
AMP
150K
MIC
GND
MUTE
MICROPHONE
PTT
IC2
IC3, Q3
(HM-169/HM-174)
MIC
PTT
SPEAKER
SP-
Vcc
SP+
REG
IC1
+3.6V
(HM-169/HM-174)
(HM-169)
(HM-169) (HM-174)
N/C
SP+
GND
MIC
SP-
Vcc
SENS
N/C
• MAIN-A UNIT
(for [HM-169], [HM-174])
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