Accessory; Remote Speaker Microphone; Overview; Description - Motorola GP68 Service Manual

Remote Speaker Microphone

Overview

The remote speaker microphone is an accessory available
with the GP68 Series portable radio. This section provides a
general description of the remote speaker microphone and
describes the operation, handling precautions, and mainte-
nance of this accessory.

Description

The Model HMN9725 Remote Speaker Microphone
includes a speaker, a microphone, a push-to-talk (PTT)
switch and associated circuitry. A cable, terminated with a
special plug, is provided for attaching to the accessory con-
nector on the portable radio.
When the remote speaker microphone is attached to the
radio, the speaker in the radio is disabled, and receiver audio
is connected to the accessory speaker. Similarly, the acces-
sory microphone is connected to the transmitter, and the
accessory PTT switch can now control the PTT function in
the radio. The radio microphone and PTT switch are still
operational, but you can listen to the radio only through the
accessory speaker.
IMPORTANT
Observe safety information in the radio oper-
ating instructions.

Operation

1. Attach the microphoneÕs accessory connector
to the accessory connector on top of the radio.
2. While listening to the accessory speaker, turn
the radio on.
3. Operate radio according to operating instruc-
tions supplied with the radio.
NOTE
The microphone will perform best if it is
worn as shown in Figure 3-1.

Handling Precautions

To avoid damage to circuits, observe the following handling,
shipping, and servicing precautions.
March, 1997
Figure 3-1. Ideal Microphone Position
¥ Prior to and while servicing a remote speaker
microphone, particularly after moving within
the service area, momentarily place both hands
on a bare metal, earth-grounded surface. This
will discharge any static charge which may have
accumulated on the person doing the service.
¥ Whenever possible, avoid touching any electri-
cally conductive part of the unit with your
hands.
Wearing a conductive wrist strap (Motorola
No. RSX-4015A) will minimize static
buildup during servicing.
While wearing a conductive wrist strap, be
careful near high voltage sources. The good
ground provided by the wrist strap will also
increase the danger of lethal shock from acci-
dentally touching high voltage sources.
¥ When servicing a unit, avoid carpeted areas, dry
environments, and certain types of clothing
(silk, nylon, etc.) because they contribute to
static buildup.
6881086C09-O
Section 3

Accessory

NOTE
WARNING
3-1