Tc320 Manuall

TC-320 Service Manual

Contents
Introduction ................................ ................................................................ ........................ 3
Safety Information ................................ ................................................................ .............3
Radio Overview ................................................................................................ .................. 4
Software Specifications................................ ................................................................ .....6
Circuit Description ................................ ................................................................ .............9
CPU Pins................................................................................................ ........................... 13
TC-320 Parts List 1................................ ................................................................ ........... 17
TC-320 (400 -420MHZ) Parts Change Record ................................ ................................. 26
TC-320 (450 -470MHZ) Parts Change Record ................................ ................................. 39Adjustment Description ................................ ................................................................ .. 43
Troubleshooting Flow Chart ................................................................ ........................... 52
Disassembly and Assembly for Repair ................................ .......................................... 55
Exploded View................................................................ .................................................. 59
TC-320 Parts List 2................................ ................................................................ ........... 60
Packing ................................................................ ............................................................. 62
TC-320 VF PCB View TopLayer ................................................................ ...................... 63
TC-320 VF PCB View Bottom Layer ................................................................ ................ 64
TC-320 VG PCB View Top Layer ................................ ..................................................... 65
TC-320 VG PCB View Bottom Layer ............................................................................... 66
TC-320 Level Diagram ................................ ................................................................ ..... 67
TC-320 Block Diagram................................ ................................................................ ..... 68
TC-320 Schematic Diagram(RF) ..................................................................................... 69
TC-320 Schematic Diagram(CPU) ................................................................ ................... 70
TC-320 (U1) VF Schematic Diagram(PLL) ................................ ................................ ...... 71
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TC-320 Service Manual
TC-320 (U1) VG Schematic Diagram(PLL) ................................................................ .....72
TC-320 (U2) VF Schematic Diagram(PLL) ................................ ................................ ...... 73
TC-320 (U2) VG Schematic Diagram(PLL) ................................................................ ..... 74
Specifications................................ ................................................................ ................... 75

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TC-320 Service ManualIntroduction
Manual Scope
This manual is intended for use by experienced technicians familiar with similar types of communication equipment. It
contains all service information required for the equipment and is current as of the publication date.

Safety Information
◇

This radio shall be serviced by qualified technicians only.

◇

Only use HYT supplied or approved batteries and...