This Yaesu FT-817 Service Manual provides technical information necessary for servicing the Yaesu FT-817 HF & V/UHF-Bands Transceiver. 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 Yaesu FT-817 is carefully designed to allow the knowledgeable operator to make nearly all adjustments required for various station conditions, modes and operator preferences simply from the controls on the panels, without opening the case of the transceiver. The Yaesu FT-817 Operating Manual describes these adjustments, plus certain internal settings. Servicing this equipment requires expertise in handling surface mount chip components. Attempts by unqualified persons to service this equipment may result in permanent 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 components (trimmers, coils, electrolytic capacitors, packaged ICs, etc.) or lead components only.
While we believe the technical information in this manual 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 information would be appreciated. VERTEX STANDARD reserves the right to make changes in this transceiver and the alignment procedures, in the interest of technological improvement, without notification of owners. The Yaesu FT-817 internal assembly consists of the MAIN Unit, Control ( PANEL) Unit, and the PA Unit. The MAIN Unit contains the receiver front end, PLL IC, and switching circuits, as well as the VCO Unit (local oscillator for transmission and reception). The PANEL Unit contains the CPU and resets circuits, as well as the power circuitry for the LCD.
Yaesu FT-817 Service Manual tables of content Specification, Exploded View & Miscellaneous Parts, Block Diagram , Circuit Description, Alignment, Interconnection Diagram, Board Unit (Schematics, Layouts & Parts).
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