Service Manual

MM-E 2072-09333-00
2-10
• Control head, shown in Figure 2-8. This is a separate unit that includes the operator interface and
CONTROL HEAD module, which are similar to the front panel of the Micom-Z dash-mount
version, except that the speaker is external. The access to the CONTROL HEAD module is
through a rear cover fastened by four screws to the front panel.
The control head is connected to the body assembly by a cable, which also includes a branch for
connecting an external speaker.
Front Panel
CONTROL HEAD
Module
Rear Cover
LCD
Figure 2-8. Micom-Z Trunk-Mount Version, Structure of Control Head
2-1.2.2 Wiring Diagram
Figure 2-9 shows the wiring diagram of the Micom-Z trunk-mount version.
a. Body Assembly. This assembly comprises the following main modules:
(1) LORD module: same as the Micom-Z dash-mount version module.
(2) HI POWER module: same as the Micom-Z dash-mount version module.
(3) INTERCONNECTION module: contains interface circuits that enable the microcomputer
system in the LORD module to communicate with that in the CONTROL HEAD module
via the interconnecting cable, an interface for the microphone signal, and a supply voltage
switch for the control head.
b. Control Head. This assembly comprises the CONTROL HEAD module, similar to the
CONTROL HEAD module in the dash-mount version, except that it includes interface circuits
that enable the module to communicate with the LORD module via the interconnecting cable.
The cable also provides the connection to an external speaker.