After Sales Technical Documentation THA–4S Series Transceiver Chapter 5 DISPLAY MODULE Original, 12/95
THA–4S Display After Sales Technical Documentation CHAPTER 5 – DISPLAY MODULE CONTENTS Page No Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display Module Connector J2 . . . . . . . . . . . . . . . . . . . . . . . . .
After Sales THA–4S Technical Documentation Display Introduction The Display Module controls the operation of the display and backlighting. The Display Module is controlled by the System Module. Technical Specifications External Connectors The Display Module is provided with 18 connections to the System Module.
After Sales THA–4S Technical Documentation Display Side Volume Connector J2 The side Volume Keys are connected to the main LCD flexi, J2 Name Description ROW0 Keyboard input line to system module COL2 Keyboard output line to system module ROW1 Keyboard input line to system module COL3 Keyboard output line to system module Functional Description Circuit Description General The Display Module consists of one IC, a display and LED backlighting.
After Sales THA–4S Technical Documentation Display LCD backlighting is provided by LED’s V1, V2, V3 and V4. Constant current is supplied by the System Module. Side Volume Connector The display module contains side volume and on/off keys. The keys are connected to the System Module via the Display Module Connector J2. The buttons enable the user to alter the volume level and the on/off switch for the radio variants.
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