[1000mp] FT-1000MP Tx No Output

[Vince-WA2RSX]

    Hi Gary:


    I have experienced this type of symptom with a FT1kD.  In fact, my
    1kD is down now due to unable to locate final xsistors.   I believe
    the 1kMP has same Final to LPF to VSWR ckt chain.


    If any one of the LPF channels goes bad, it causes the Finals to be
    damaged; damaged finals results in no output on any band or any
    mode. In my case, I replaced all caps located within the 40m LPF
    channel ckt to effect repair.


    If you have access to a RF signal generator, disconnect PA from the
    LPF; inject a low level of RF voltage into LPF module; switch in one
    channel, then the next, while monitoring for a signal output; IOW,
    look for a damaged LPF channel, using low RF voltage level drive.
    Replacing finals w/o locating and repairing a damaged LPF channel
    will again cause damage to the finals. Catch-22!


    Good luck. es 73.


    de Vince
    WA2RSX

On 6/11/2014 12:02 AM, gary skillicorn wrote:
> Looking for some help from the FT-1000MP experts. I'm a new owner of an FT-1000MP but not new to amateur radio - first licensed 1960. I've identified my observations to help diagnose the problem .
>
>
>
> - in the middle of a SSB
> QSO noticed the Po (power output) on the meter stopped
> indicating
>
>
> - no RF output showing on external SWR bridge with dummy load
>
> - receive is normal
>
> - on voice peaks the Ic (collector current) shows what I believe to be normal
> high current indications
>
> - on a separate receiver I hear what I think is normal driver stage output
>
> - no RF output on CW either (showing significant but
> probably normal Ic)
>
> - disabling auto ant tune with dummy load makes no difference
>
> - when the original outage occurred the cooling fan turned on
>
> -  switching between
> antenna connectors A and B has no effect
>
>
> -   a full reset
> had no effect
>   
>
>
>
>   
>
> I'm assuming a PA problem, but since Ic seems normal, it is
> confusing. PA appears to be being driven yet no RF out. Anyone offer some ideas of the cause and possible solutions?  Thank you in advance.
> 73's   Gary   K3GS
>
>
>
>   		 	   		
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