Yaesu FT-847 Technical Supplement

Also see for FT-847: Operating manual Technical supplement Technical supplement Modification

Introd uctionPOWER CLMC)0 5, !...!...1"' ;II' ,i" .~_.- ID 0'iiiii""""I0'" .-we TUNE~ 'I !"W U 35sn Bnnn,'" l u 5 D nBnn 0O"OX ~'~=--.::: , .U .UUU bRDI '"'l ..:JU .UU C~ M[DPJ~ YAESU "oce'RANsce'"",, FT-847 -"Te~- 808FT'-J "" ---RFPWR An RF [ CD C!E:J @EBJ ~ Ij~~la:aO~ ~ ~~~8 0 0Q-O~o~ ~ ~~~~ -"OF'LO"c~N:oCH0 SOL-'#-:1110 AF-3-RF VO"E $~~~3~S~23 ~ -3-~~ 0~ Jr!J~~ jf~l0 T L ~~~De5~ ~~~I[ 1~~[ a ~&~:&;cb t~~~?;0 ~This manual provides technical information covered by warranty. For the major circuitnecessary for servicing the Yaesu FT-847 HF & boards, each side of the board is identified byiV/Transceiver.It does not include in- the type of the majority of components installedformation on installation and operation, which on that side. In most casesone side has only chipare described in the FT-847 Operating Manual components, and the other has either a mixtureprovided with the transceiver, or on accessories of both chip and lead components (trimmers,which are described in their manuals. coils, electrolytic capacitors, packaged ICs, etc.),The FT-847is carefully designed to allow the or lead components only.knowledgeable operator to make nearly all ad- While we believe the technical information injustments required for various stationconditions, this manual is correct, Yaesu assumesno liabili-modes and operator preferencessimply from the ty for damage that may occur as a result of typo-controls on the panels, without opening the case graphical or other errors that may be present.of the transceiver. The FT-847 Operating Manu- Your cooperation in pointing out any inconsis-al describes these adjustments, plus certain in- tencies in the technical information would beternal settings. appreciated. Yaesu Musen reserves the right toServicing this equipment requires expertisein make changes in this transceiver and the align-handling surface mount chip components. At- ment procedures, in the interest of technologicaltempts by unqualified persons to service this improvement, without notification of owners.equipment may result in permanent damage not1-1FT -847 Technical SupplementI