Vertex Standard FT-817, User Manual

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©2003 VERTEX STANDARD CO., LTD. Printed in Japan.
(E137790A)
Technical Supplement
FT-817
HF / VHF / UHF
All Mode Transceiver
Introduction
This manual provides technical information necessary for
servicing the Yaesu FT-817 HF & V/UHF-Bands Trans-
ceiver. It does not include information on installation and
operation, which are described in the FT-817 Operating
Manual provided with the transceiver, or on accessories
which are described in their manuals.
The FT-817 is carefully designed to allow the knowledge-
able operator to make nearly all adjustments required for
various station conditions, modes and operator preferenc-
es simply from the controls on the panels, without open-
ing the case of the transceiver. The FT-817 Operating Man-
ual describes these adjustments, plus certain internal set-
tings.
Servicing this equipment requires expertise in handling
surface mount chip components. Attempts by unqualified
persons to service this equipment may result in perma-
nent damage not covered by warranty. For the major cir-
cuit 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
Circuit Description ....................................... 7
Alignment..................................................... 13
Interconnection Diagram........................... 23
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 ...................................................................57
REF Unit ...................................................................65
PA / FINAL Unit......................................................71
PANEL Unit .............................................................89
VR Unit .....................................................................99
TCXO-9 Unit (Option) ..........................................100
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.
International Division
8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, 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