Yaesu FC-50 User Manual

Specications
Exploded View & Miscellaneous Parts
Block Diagram
Connection Diagram
Board Unit (Schematics, Layouts & Parts)
CNTL Unit
CAPACITOR Unit
COIL Unit
Automatic Antenna Tuner
FC-50
Introduction
This manual provides the technical information necessary for
servicing the FC-50 Automatic Antenna Tuner.
Servicing this equipment requires expertise in handing sur-
face-mount chip components. Attempts by non-qualified
persons to service this equipment may result in permanent
damage not covered by the warranty, and may be illegal in
some countries.
Two PCB layout diagrams provided for each double-sided
board in this transceiver. Each side of the board is referred
to by the type of the majority of components installed on
that side ("Side A" or "Side B"). In most cases one side
has only chip components, and the other has either a mix-
ture of both chip and leaded components (trimmers, coils,
electrolytic capacitors, ICs, etc.), or leaded components
only.
While we believe the information in this manual to be cor-
rect, YAESU assumes no liability for damage that may oc-
cur as a result of typographical or other errors that may be
present. Your cooperation in pointing out any inconsisten-
cies in the technical information would be appreciated.
Important Note
This antenna tuner was assembled using Pb (lead) free solder, based on the RoHS specication.
Only lead-free solder (Alloy Composition: Sn-3.0Ag-0.5Cu) should be used for repairs performed on this apparatus. The solder stated
above utilizes the alloy composition required for compliance with the lead-free specication, and any solder with the above alloy compo-
sition may be used.
Contents
Technical Supplement
EBA53X90A
©2017 YAESU MUSEN CO., LTD.

Yaesu FC-50 Specifications

General

Type	Automatic Antenna Tuner
Frequency Range	1.8 - 54 MHz
Power Supply	13.8 V DC
Connectors	SO-239
Maximum Power	100 W
Memories	100

Summary

Introduction

Specifications

Exploded View & Miscellaneous Parts

Block Diagram

Connection Diagram

CNTL Unit

CNTL Unit Circuit Diagram

Circuit diagram detailing the functionality and connections of the CNTL Unit.

CNTL Unit Parts Layout (Side A)

Layout diagram for the CNTL Unit, Side A, showing component placement.

CNTL Unit Parts Layout (Side B)

Layout diagram for the CNTL Unit, Side B, showing component placement.

CNTL Unit Parts List

Comprehensive list of components used in the CNTL Unit, including part numbers and values.

CAPACITOR Unit

CAPACITOR Unit Circuit Diagram

Circuit diagram for the CAPACITOR Unit, showing capacitor and relay configurations.

CAPACITOR Unit Parts Layout (Side A)

Layout diagram for the CAPACITOR Unit, Side A, showing component placement.

CAPACITOR Unit Parts Layout (Side B)

Layout diagram for the CAPACITOR Unit, Side B, showing component placement.

CAPACITOR Unit Parts List

List of components for the CAPACITOR Unit, including capacitor and relay details.

COIL Unit

COIL Unit Circuit Diagram

Circuit diagram for the COIL Unit, illustrating coil and capacitor configurations.

COIL Unit Parts Layout

Layout diagrams for the COIL Unit, showing component placement on both sides.

COIL Unit Parts List

List of components for the COIL Unit, including coil and chip capacitor details.