[Yaesu] Fw: Yaesu FT990

[Dr. Gerald N. Johnson]

The 990 I don't know but there are three resets for the FT-857, each has 
different actions. The super master reset also resets all the factory 
alignment settings like band by band RX and TX gains so its a really bad 
idea to do that reset. It might be beneficial to access that alignment 
menu with the help of the technical supplement and with a list of 
average settings to see if they have changed. Such things might be on 
mods.dk as there might be discussions of similar problems. One download 
every 4 days is free.

It could be that snow atatic did some damage to the transmitter, like 
the relay, the tuner, or the SWR diodes. More than a few Tentecs have 
had problems with static taking out the diodes in the SWR section.

73, Jerry, K0CQ

On 2/13/2015 10:09 PM, Pat Casey wrote:
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>
> My FT 990 is giving me grief, after a/c power main fluctuation (snow storm).
>
> Receiver works great, but PA/ATU seems not to work. No indication of problem until after 115v main power fluctuation.
>
>
>
> Here is what is happening:
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>       1. while trying to tune up on 21mhz, with rf power set at near minimum, as usually done, I attempted to activate atu.
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>       2. when "tune" button pressed, both the red xmit light and the amber wait light would illuminate, for about 5 seconds, then go out, which seems longer than usual.
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>       3. there was no needle movement on the meter. I did not hear the atu working to find a  match.
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>       4. when keying xmitter, either with hand key, or mic, the meter needle would go to zero, when needle selector in power output position (PO). When IC position
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>           selected, the final amplifier collector current read O (zero), and when Vcc position selected, the final amplifier collector voltage read 105 volts.
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>
>
> Is there a way to re-boot the system?
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> Any suggestions?
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>
>
> tnx es 73
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>
>
> e-mail: pkc at citytel.net
>
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