Icom IC-706 MKII Instruction Manual page 11

PANEL DESCRIPTION 1
E Microphone (HM-103)
© UP/DOWN SWITCHES [UP]/[DN] @ LOCK SWITCH [LOCK]
Change the operating frequency. Locks the [UP]/[DN] switches.
e Push and hold to change the frequency continuously.
Tuning step is 50 Hz when no TS indicator appears. © PTT SWITCH [PTT]
Push and hold to transmit; release to receive.
TECHNICAL INFORMATION
¢ MICROPHONE CONNECTOR
Z IN NO. T ESCRIPTION
O
. 5 1 | +8 VDC output Max. 10 mA
os l x Frequency up
& 3 Ry = g Frequency down Ground through 470 Q
~ O c
9 e a 2 =. £ Squelch open "LOW" level
>F 3 Ee § 9g E Squelch closed "HIGH" level
Fè ta 6 26a
oe og © © 8
Caution: DO NOT short pin 1 to ground as
Rear panel view this can damage the internal 8 V regulator.
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eHM-103 SCHEMATIC DIAGRAM
MICROPHONE 2k MICROPHONE PLUG
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DOWN UP
= zis
PTTO RECEIVE 470
D TRANSMIT