Yaesu FT-897 defekt/fejl

En Yaesu FT-897 sender fuld power i FM og AM mode, men giver ingen effekt ud i SSB/USB mode. Det gælder alle bånd, HF-6m-2m-70 cm.
Hvad kan dette mon skyldes ? Den er resat til fabriksindstilling for at udelukke fejlindstilling. Nogen det har en ide ?

Svar til #1:
Modulerer den på FM..
Francis

Svar til #1:

En FT-857 radio ligner en 897 i opbygningen og her er en lille beretning:


Not sure if this helps but I bought a used 857. When I got it it wouldn't transmit on usb/LSB but would transmit on FM. I sent it to Cal at hamrepair.com and it was a burned out filter. Some type of defect allows voltage to backfeed. He replaced the filter and fixed it so it couldn't backfeed again.

Svar til #1:

Advarsel:

Kig lige her angående reset af FT-897


http://www.eham.net/ehamforum/smf/index.php?top ic=54985.0

# 2 Ja der moduleres på FM
# 3 og 4 Lader til at man skal være forsigtig med hvad man roder med i menuen.

Takker for respons. Er der mon nogen derude der har en model magen til der har haft samme problem ?

Svar til #5:

Virker CW?

Du bør tjekke om der er signal før/efter 455kHz keramisk filter CF1004.

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Sammenlign med - kan anvendes til at tjekke fabriksindstilling mod hvad andre har:

http://qsl.net/oz1dgq/home-filer/yaesu-hints/ft 897-servicemenu.pdf
http://www.radioamatoripeligni.it/i6ibe/897/ser vicemenu.pdf

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En anden gang:

FT897 Controller Software:
http://www.dl4cu.isa-geek.net/ft897-e.html
Vigtigt - der er mange værdier, men lav den manuelle backup af dem (skriv dem ned):
http://cboh.org/whitepapers/FT-897D/
Citat: "...
MAKE A BACKUP OF YOUR SERVICE MENU: If I had just known all this and saved the values from my rig prior to this incident, although it might have taken some time, I could have reprogrammed them back into the rig after the data corruption had occurred. With 20/20 hindsight, I would urge all FT-897 owners to go into their Service Menu and copy down these values before an unfortunate event leads to their loss. To enter the Service Menu, power the rig on from the front panel power button while simultaneously depressing the A, B, and C buttons. You'll hear the distinctive "diddle-diddle-diddle" sound that indicates you are in the Service Menu, and the first item "01:HF1RXG" will display on the rig's screen, along with its value. You can scan through the Service Menu list by using the MEM/VFO knob. The values can be changed using the main tuning knob, but don't do this. Instead, copy down each Service Menu number and its value in turn. On my FT-897D there were 74 of them. After you have copied all the values, exit the Service Menu by powering the rig off, or pressing and holding the "F" key to rewrite the values if you've changed any of them. Then, if you ever experience an event where your EPROM becomes corrupted, you can recover from it without having to pull out the scope and signal generator.
...
Modifying the FT-897's 60 Meter Channelized Frequencies
..."

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Der er en servicemanual med diagram her:
http://www.arcticpeak.com/files/FT-897%20Techni cal%20Supplement.pdf

Svar til #5:
For nogle år siden, (nok snart 10) havde jeg anskaffet mig en 897ér, og godt hjemkommet satte jeg den til min indendørs 6m loop, (troede det var min longwire), og da jeg tunede (havde også købt en at-897) gav det et gevaldigt brag i mine bcl-højttalere.

Da jeg fik sundet mig lidt, var der ingen musik, en Nad stået af, og der var ingen liv i 897éren, (intet output), begge dele måtte til rep.

Nadén havde brændt at par kredse, og 897éren røg hele vejen til Japan, intet skiftet, men justeret. (Formoder at de har data på serienummeret, men det tog nogle måneder før den kom retur)

Mvh Ebbe

Svar til #1:

Der kan sagtens være nedbrud i et keramisk filter (455 kHz) og det er en god ting, at montere DC blocking capacitors i både indgang og udgang på disse filtre (0,01uF)


Not only did the dreaded fault appears but both SSB & AM tx died also same time. FM was fine at 80W so I knew the filter issue was happening rather than blown finals.

Went online found how to do the mod and fitted the 2 x 0.01uF caps between the filter pins and had to do a jump resistor 4,7K as recommended , but what a nightmare to track cut & solder.

Svar til #1:
Hej
Det ER noget vrøvl, med nedbrud i et keramisk filter ! SRI, men gælder der USB/LSB/CW eller er der full bærebølge overalt, uanset mode ?
SRI skulle blot læse ALT. Ellers kom forbi Roskilde - så kikker jeg på den.
SRI ser lige du er fra Randers, HI.VY 73 de OZ5IQ, Kim

Svar til #2:
SRI, men det har intet med sagen at gøre ..

5IQ, Kim

Det lader til at mulighederne er mange. Hvis den skal fikses må det være en proff radiodokter der skal ordne den.
Tak for gode råd og links.

Svar til #1:
Prøv lige at søge på youtube, der er masser af tek. Tips

Dan