ICOM IC-M503 用户手册

30

12

HM-134 REMOTE-CONTROL MICROPHONE

!1 EXTERNAL SPEAKER JACK 

➥Connect the external speaker (

an 8 

Ω load)

. The internal

speaker can be deactivated via the Set mode program-
ming. (p. 37)

• The speaker output employs a BTL (Balanced Trans-

Less) circuit, NEVER connect the speaker cable to
ground (or chassis). Use a floating setup.

After connecting the external speaker jack,

cover the jack with water resistant tape as shown below to
avoid water seeping into the microphone.

Binding the mic-cable and external-speaker jack connec-
tion mold with water resistant tape increases the water-
proofing of the connection mold. 

■ Function display

q CHANNEL GROUP INDICATOR (pgs. 6, 32)

Indicates whether an International (INT) or U.S.A. (USA)
channel is selected.

w KEY LOCK INDICATOR (p. 34)

➥Appears while the key lock function is in use.
➥Flashes while the all key lock function is in use.

e CHANNEL NUMBER READOUT

➥Indicates the selected operating channel number. “A”

appears when a simplex channel is selected. (pgs. 6,
32)

q
w

r

t

e

!6 !5

!2

!3

!1

!0

o
i
u

y

!4

!7

External SP jack

Connection mold

01 IC-M503-(1).qxd  01.12.17 5:00 PM  Page 30 (1,1)