[Yaesu] FT-757GX Sudden Drift

[Paul Carr]

The local board is located under the top cover.  There is a screen over 
the board that has holes for adjusting the trimmer caps. I am not 
absolutely sure, but I think the cap to adjust is "TC08" which is 
located in the middle of the board. My schematic and block diagram don't 
seem to agree with each other.  If you have the service manual, it might 
tell you for sure.  Let me know if you positively ID the right cap.

Paul - WL7PC

David Vondrasek wrote:
> Do you happen to know the Part # of this trimmer ? Where is is on the Local
> board ?
> I have the service Manul as a referance.
> 
> Thanks
> 
> 
> At 02:57 PM 6/21/2003 -0300, GGLL wrote:
> 
>>  Check first the trimmer capacitor which adjusts reference crystal 
>>oscillator (Local unit),  it may be dirty, rotate it back and forth 
>>several times, if it stabilizes then you can use it a few more time, if 
>>not you must change it. After  this you must also re-calibrate your 
>>frequency display.
>>
>>Good luck
>>Guillermo - LU8EYW.
>>
>>David Vondrasek escribió::
>>
>>
>>>By 757 has all of a sudden started drifting down about 1.5 kcs. Then after
>>>a while jump back on freq. It's not a slow drift it just jumps down. I can
>>>turn the dial and get back to the station and after a while it goes back to
>>>where it belongs.  I don't think it's heat related as it does it 3-5
>>>minutes after I've turned it on. Anyone seen this ? Have an idea what the
>>>deal is ? I notice the TX is a little wrong also while it's drifted. I
>>>can't get full power. Once it gioes back I have a full 100 watts again.
>>>
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>>> 
>>>
>>
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> 
> 
> 
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