EasyManua.ls Logo

HYT TC-780 Service Manual

HYT TC-780
113 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image

Other manuals for HYT TC-780

Question and Answer IconNeed help?

Do you have a question about the HYT TC-780 and is the answer not in the manual?

HYT TC-780 Specifications

General IconGeneral
Battery TypeLi-Ion
Output Power5W
IP RatingIP54
Frequency Range400-470MHz
Channel Capacity16 channels

Summary

General

Safety Information

General safety precautions for operation, service, and repair of this equipment.

Radio Overview

Controls and Indicators

Details PTT, Side Keys (SK1, SK2), Top Key (TK), Function/Numeric Keypads, and LED.

Software Specifications

Key Features

Covers channel capacity, encoding standards, scan features, timers, and emergency functions.

Circuit Description

Circuit Blocks Overview

Details circuit composition, frequency configuration, receive, transmit, and synthesizer circuits.

Control and Power Circuits

Describes MCU, power supply, power switch, and keypad/display circuits.

CPU Pins

Pin Definitions (1-100)

Comprehensive list of CPU pin functions, I/O, and remarks for all pins.

TC-780 VHF Main Board Parts List

Capacitors

Lists chip and tantalum capacitors with material numbers and reference designators.

TC-780 UHF Main Board Parts List

Capacitors

Lists chip and tantalum capacitors for the UHF main board.

TC-780 Keyboard Unit Parts List

Components

Lists resistors, LEDs, transistors, diodes, and inductors for the keyboard unit.

Adjustment Description

All Reset Procedure

Steps to perform an all reset on the radio.

Tuning Procedures

Details transmitter and receiver tuning adjustments.

Troubleshooting Flow Chart

Major Circuit Troubleshooting

Flow charts for diagnosing MCU, VCO, Transmit, and Receive circuits.

Disassembly and Assembly for Repair

Disassembly Steps

Instructions for disassembling the radio case, speaker, and internal units.

Assembly Precautions

Important notes for correctly assembling the radio case and chassis.

Exploded View

Packing

PCB Views

Main Board and Keyboard Layouts

Top and bottom layer views of the VHF, UHF main boards and keyboard unit.

Block Diagram

Circuit Diagrams

Key Circuit Diagrams

Illustrations of PLL&VCO, Power, MCU, TX/RX, Baseband, LCD circuits.

Specifications

General, Receiver, Transmitter Specs

Details frequency range, channel capacity, sensitivity, power output, and stability.

Related product manuals