Functional description of PCBs
48 Manpack Transceiver 2110 series Repair Guide
Front Panel PCB
The Front Panel PCB performs the following functions:
• interprets data from the Audio & Control PCB and displays it on the LCD
• reads keypad entries and sends data to the Audio & Control PCB
• provides an RS232 port for programming/control
• amplifies the audio for the internal and external speakers
• pre-amplifies microphone audio and external audio input
• provides side-tone for the handset
• provides contrast adjustment for the LCD
• backlights the LCD
• passes the key inputs directly to the Audio & Control PCB
The Front Panel PCB contains:
• a UART to provide GPIO control (IC6)
• an RS232 driver/receiver (IC11)
• an octal D-type latch (IC4, IC5) for switching speaker, RS232 functions, speaker
on/off etc
• audio amplifiers to drive the handset earphone (IC8), internal speaker (IC3) and an
external speaker (IC9)
• amplifiers to provide pre-amplification of microphone (IC1) and external audio in
(IC19)
• an amplifier to produce side-tone to the earphone (IC21)
• an LCD (H2) and drivers (IC16, IC17, IC18)
• a connection to the Front Panel Assembly
• a connection to the GPS antenna, if fitted
• a connection to the external GPS antenna connector, if fitted
• a LED (H1) for backlighting
For details on the Front Panel PCB,
Codan part number
See...
08-06129-001 Table 12 on page 49
To Next Page
