Yaesu FT-817 - Technical supplement

©2005 VERTEX STANDARD CO., LTD.               (E137790B)

Technical Supplement

FT-817/FT-817

ND

HF / VHF / UHF

All Mode Transceiver

Introduction

This manual provides technical information necessary for

servicing the Yaesu FT-817/FT-817

ND

 HF & V/UHF-Bands

Transceiver. It does not include information on installa-

tion and operation, which are described in the FT-817/

FT-817

ND

 Operating Manual provided with the transceiv-

er, or on accessories which are described in their manuals.

The FT-817/FT-817

ND

 is carefully designed to allow the

knowledgeable operator to make nearly all adjustments

required for various station conditions, modes and oper-

ator preferences simply from the controls on the panels,

without opening the case of the transceiver. The FT-817/

FT-817

ND

 Operating Manual describes these adjustments,

plus certain internal settings.

Servicing this equipment requires expertise in handling

surface mount chip components. Attempts by unquali-

fied persons to service this equipment may result in per-

manent damage not covered by warranty. For the major

circuit boards, each side of the board is identified by the

type of the majority of components installed on that side.

In most cases one side has only chip components, and the

other has either a mixture of both chip and lead compo-

Contents

Specification .................................................... 2

Exploded View & Miscellaneous Parts ..... 3

Block Diagram ................................................ 5

Interconnection Diagram .............................. 7

Circuit Description......................................... 9

Alignment ......................................................15

nents (trimmers, coils, electrolytic capacitors, packaged

ICs, etc.), or lead components only.

While we believe the technical information in this manu-

al is correct, VERTEX STANDARD assumes no liability

for damage that may occur as a result of typographical or

other errors that may be present. Your cooperation in

pointing out any inconsistencies in the technical informa-

tion would be appreciated. VERTEX STANDARD reserves

the right to make changes in this transceiver and the align-

ment procedures, in the interest of technological improve-

ment, without notification of owners.

Board Unit (Schematics, Layouts & Parts)

MAIN Unit ............................................................... 25

PLL Unit ................................................................... 63

REF Unit ................................................................... 75

PA / FINAL Unit ..................................................... 81

PANEL Unit ............................................................. 99

VR Unit ................................................................... 109

TCXO-9 Unit (Option) .......................................... 110

VERTEX STANDARD CO., LTD.

4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan

VERTEX STANDARD

US Headquarters

10900 Walker Street, Cypress, CA 90630, U.S.A.

YAESU EUROPE B.V.

P.O. Box 75525, 1118 ZN Schiphol, The Netherlands

YAESU UK LTD.

Unit 12, Sun Valley Business Park, Winnall Close

Winchester, Hampshire, SO23 0LB, U.K.

VERTEX STANDARD HK LTD.

Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,

Kwun Tong, Kowloon, Hong Kong