[Kenwood] TS-50 Problem

[Rick Markey, KN3C]

I've run into an odd problem with my TS-50 that perhaps someone has seen 
before.

Without warning, the received signal will become noisy and garbled, as if 
one of the PLL's unlocked.  Moving the VFO as little as 5 KHz stops the 
problem.  And, the problem seems to occur only on certain frequencies.  I 
do have the problem on 14300, but if I move up to 14305 it stops.  And as 
near as I can tell, it happens on all bands.  It has done it once on 
transmit, after which I removed it from the car and put it on the bench.

So far, I can't find anything wrong with any of the VCO's.  A slight 
pressure on the PLL board in the vicinity of the 55 MHz test point will 
stop the problem.  I've had the board out a number of times looking for bad 
solder joints, and all the mounting screws are tight.  Part of the PLL 
board is impossible to get at because the Digital board  covers a 
substantial portion of the board.

If anyone has seen this before I'd appreciate a hint or poke in the right 
direction.


de Rick, KN3C