Tait TM8100 mobiles, Service Manual

Page: 102 / 620

102 Circuit Descriptions TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
3.11 RJ45 Control Head
Introduction
This section describes the circuitry of the control-head board for the RJ45
control head.
User Interface
The control-head board includes a
POWER ON
/
OFF
LED which indicates
whether the radio is switched on or off
1
.
Connectors The control-head board includes the circuitry for the following connectors:
■
programming connector (RJ45 socket)
■
control-head connector (18-way MicroMaTch socket).
For pinouts of the connectors, refer to “Connectors” on page 38 .
Basic Circuitry
The signals of the control-head connector are directly connected to the
telemetry connector. The
POWER ON
/
OFF
LED is supplied by the +13V8
voltage.
1. The signal supplying the LED can be switched or unswitched. For more information refer to
“Connector Power Supply Options” on page 90 .
Figure 3.17 Block diagram of the control-head board of the RJ45 control-head
Control-Head
Connector
Control-Head Board of
RJ45 Control Head
PRG ON OFF
+13V8
CH RXD
CH MIC AUD
AGND
CH PTT
CH RX AUD
CH TXD
CH ON OFF
+13V8
PRG RXD
PRG MIC AUD
AGND
PRG PTT
PRG RX AUD
PRG TXD
Programming
Connector
Power On/Off
LED
Signal types:
analog
digital
asynchronous
serial data +13V8