Motorola APX 5000 Service Manual page 51

Theory of Operation
: Controller
3.2.1.1 Main Controller Components and Connections
3.2.1.1.1 VOCON Board
The VOCON Board contains the OMAP1710 dual-core processor, FLASH and SDRAM memory,
Audio circuitry (MAKO and CODEC IC's), a Complex Programmable Logic Device (CPLD), and
interfaces to the other components in the controller design.
Connectors
• RF Board – J1001
• Control Top – J2101
• Keypad – J2303
• Front Display – J2304
• Expansion Board – J4001
3.2.1.1.2 Expansion Board
The expansion board contains the Class D internal audio power amplifier with speaker connections,
a Global Positioning System (GPS)/Bluetooth 2.1 combination IC and support circuitry, a 3-axes
digital accelerometer, a Type III encryption IC, a 4GB e-MMC NAND flash, and connector interfaces
to the GCAI board and side controls flex.
Connectors
• VOCON Board – P2001
• Side Controls – J2005
• GCAI – J2004
3.2.1.1.3 GCAI Connector / Board
The GCAI Connector Board contains the side connector pins, and interfaces to the expansion board
through a flex. The board has this flex connector, along with components for ESD protection.
3.2.1.2 Top Controls / Flex
The control top contains the top display, the main RF antenna, and five switches: On/Off & Volume
Knob, a 16-position Channel/Frequency Switch with concentric 2-position switch (for secure enable/
disable operation), a 3 position toggle switch for Zone Selection, and a toggle switch used for
Emergency Calling. The control top also includes an TX/RX LED that is solid amber upon receive,
red on PTT, and blinking amber on secure RX.
3.2.1.2.1 Top Display
The Top Display is a FSTN transflective monochrome liquid crystal display (LCD) with a multi-color
backlight (White, Red, Green, and Amber), which connects to the Control Top Flex (see
3.2.1.2: "Top Controls /
3.2.1.2.2 Front Display
The Front Display is a QVGA transflective color LCD, 130 pixels x 130 pixels with a white backlight.
The display connects through a flex directly to a 22-pin connector located on the VOCON board.
3.2.1.2.3 Keypad / Flex
The keypad flex features a 3 x 2 Menu keypad with 4- way navigation button, and a 3 x 4
alphanumeric keypad. The keypad connects through a flex directly to a 20-pin connector on the
VOCON board.
Flex").
3-25
Section