R.V.R. TEX30-LCD FM Exciter User Manual: Technical Appendix

Introduction

This part of the manual contains the technical details regarding the construction of the individual board components of the TEX30-LCD. This appendix is composed of the following sections:

Document History

Detailed Board Information (Summarized)

Wiring Diagrams

Detailed wiring diagrams for the TEX30-LCD system illustrate interconnections between various modules such as the Panel Card, Power Supply, Telemetry Card, RF Control, Power Amplifier, Main Card, and Coder CTC30. Key components like fans, fuses, and connectors are depicted, showing the overall system architecture.

Main Board (SLMBDTEXLC04)

This section provides schematics and component layouts for the Main Board, covering critical circuits including audio sections (Mono Mpx Stereo), Phase-Locked Loop (PLL), Voltage-Controlled Oscillator (VCO), and Driver stages. Detailed diagrams show the arrangement of operational amplifiers, diodes, transistors, resistors, and capacitors, along with various test points. The Bill of Materials for the Main Board lists all components with their quantities, references, part numbers, and descriptions, providing a comprehensive overview of the board's composition.

Control Card (SL037BI1001)

Schematics and component layouts for the Control Card are presented, detailing circuits for Forward Power (FWD), Foldback (FOLD), Current Control (ICC), and Temperature (TEMP) monitoring. This board incorporates various integrated circuits (e.g., LM324SMD, TL071/SO), diodes, transistors, and connectors. The accompanying Bill of Materials provides a comprehensive list of all components used on the Control Card.

Power Amplifier (SLPA30WMOS02)

This section includes schematics and component layouts for the Power Amplifier, detailing its RF input/output, bias circuits, and power amplification stages. Key active components include MOSFETs (e.g., BLF245), diodes, and transistors, alongside various passive components. The Bill of Materials lists all parts with their specifications, enabling detailed understanding of the amplifier's construction.

Panel Card (SL007PC2001A)

Schematics and component layouts for the Panel Card are provided, which manages the front panel controls and indicators of the TEX30-LCD. It includes circuits for LEDs (Green, Yellow), switches (e.g., ESC, ENTER), and interfaces with the main CPU. The Bill of Materials provides a detailed list of components, outlining the parts necessary for the user interface.

Power Supply (FLY100SMD)

This section details the schematics and component layouts for the Power Supply unit. It covers the AC input, rectification, filtering, and regulated DC outputs (e.g., 5VDC, 18VDC, 24VDC). Key components include bridge rectifiers, transformers, diodes, and voltage regulators (e.g., LM7818, LM7805). The Bill of Materials lists all components, providing a complete overview of the power supply's construction.

Telemetry Card (SLTLMTXLCD03)

Schematics and component layouts for the Telemetry Card are included, which is responsible for telemetry functions and remote control interfaces of the TEX30-LCD. It incorporates optocouplers, relays, and various interface circuits. The Bill of Materials provides a comprehensive list of components, detailing the parts used for remote monitoring and control capabilities.