ZETRON 4010, Service Manual

Page: 9 / 123

Model 4010 Radio Dispatch Console Service Manual
9
THEORY OF OPERATION
SYSTEM DESCRIPTION
The Model 4010 Radio Dispatch Console is a single position unit that has many built-in features.
The Model 4010 is a desktop unit, and the Model 4010R is a rackmount unit. Both units have identi-
cal features and capabilities and are referred to as the Model 4010 in this manual, unless specifically
stated otherwise.
The console has individual channel volume, clock and volume meter, all-mute, simul-select, alerts,
site intercom, instant transmit, and individual channel frequency/PL select. The unit can be config-
ured for between two and twelve channels, in increments of two channels. The console is self-
contained and interfaces directly to either a base station or repeater wire lines.
The Model 4010 has a built-in paging encoder that is capable of generating all popular signaling
formats, including: Motorola/GE Two-tone, DTMF, Rotary Dial/1500Hz or 2805Hz, Plectron,
Quick-Call 1 (2+2), and 5/6-Tone Sequential. With the Instant Call Paging option, these tones can be
automatically routed to the proper channel. Without this option, the tones must be manually routed.
This Instant Call Paging option also allows individual control buttons to be programmed to send an
entire sequence of pages.
Each channel may be optioned to support a mix of control types: DC remote, tone remote, local
control, and E&M control. The DC remote control requires one optional DC Control Daughter Board
per DC channel. This DC Control Daughter board also has a line-operated transmit light (LOTL) to
indicate if a line is already in use via another control point. The tone remote control requires one,
optional Tone Remote System Adapter Board per system. Each channel that requires tone control can
now be configured with channel option switches. If a channel requires a LOTL indication, a Tone
Remote LOTL Daughter Board is then added for that specific channel.
A Phone Patch card is an option that allows the console operator to establish a patch between any
radio channel and a telephone line. The card has two telephone interfaces. The console can also
function as a push-to-talk, single-line telephone, giving the operator the ability to receive and place
telephone calls from the console. Only one Phone Patch card can be added to a system. This card
does not require one of the dual channel slots.
The Expanded Auxiliary I/O Card adds input and output capabilities over the standard eight inputs
and eight outputs that come with every Model 4010. The Expanded Auxiliary I/O Card does require
one of the Dual Channel Card slots.
The Model 4115B allows the system to be configured with an additional 60 programmable switches.
The system can accept a maximum of two expansion panels. The Console Programming System
(CPS) is used to define the function of any additional panels.
A variety of communications options may be configured with the console. The standard options are a
desk microphone, a gooseneck microphone or PTT handset with cradle, and/or a headset.
BLOCK DIAGRAM
The M4010 electronics consists of four board assemblies and a variety of option assemblies, which
are installed on the main Control Board. The main boards and option boards are listed below. A
maximum of six channel cards of any mix can be installed on the Control Board.
CONTROL
BOARD
702-9376
DUAL
CHANNEL
CARD #6
950-9715
DUAL
CHANNEL
CARD #1
950-9715
PHONE
PATCH
CARD
950-9719
950-9720
DISPLAY
BOARD
702-9378
KEYPAD
BOARD
702-9379
OPTION
DAUGHTER
CARD
TONE
REMOTE
SYSTEM
ADAPTER
950-0255
950-9922
60
BUTTON
PANEL
702-9432
M4010 PCB BLOCK DIAGRAM
OPTION
DAUGHTER
CARD
In discussion of the system’s operation, the associated U number of the ICs involved will be referred
to. The schematics of the various M4010 assemblies will be required for clarity.
CONTROL BOARD (702-9376)
The Control Board has a Motorola processor 68HC11F1, which controls the operation of the system.
The microprocessor is shown on sheet 2 of the schematic 008-9376. The system has 32K bytes of
EEPROM memory (U29), which contains all the program storage. The data storage is in 32K bytes
of battery backed RAM (U27). They connect to the microprocessor via an 8-bit data bus and 16-bit
address bus. The data bus also connects to the input and output ports for interfacing to external
signals. The other means of communication by the microprocessor is the serial peripheral interface
(SPI) and the UART U40. The SPI bus communicates with the channel cards and tone generation
module U15.