Icom IC-M503 Function display, 1EXTERNAL SPEAKER JACK, 7 !6, 5!4!3 !2!1, w KEY LOCK INDICATOR p

12HM-134 REMOTE-CONTROL MICROPHONE

!1EXTERNAL 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.

■Function display

!7 !6	!5!4!3 !2!1
WAIT TX BUSY TAG CALL LOW

CAUTION: 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.

q	USA
	INT
w	L

e

rVOL

tSQL

DUP DUAL	!0
P SCAN TRI

	o
SCRM	i
	u
y

External SP jack

Connection mold

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)

30