[Kenwood] TS-940S - Digital A board. Are these mods OK or best removed?

[Dr. David Kirkby]

I have a TS-940S which has a few issues

* PLL loses lock and so radio stops working.
* Low audio output level.
* AVR board has suffered a major burnup, and has not been repaired very well.

I decided to pull out the boards and look over them to see if there was 
obviously anything wrong with them. Cold joints, broken tracks etc.


The digital A board appears to have a number of resistors stuck on the track 
side of the board, which I can't see in the service manual, so I'm guessing they 
might not have been performed by Kenwood.

Does this look normal?

http://boxen.math.washington.edu/home/kirkby/TS-940S/digital-A.jpg

I was a bit unimpressed to find a number of mods to the DC-DC converter, which 
are shown in the service manual as components put on the reverse side of the 
board. I would have expected kenwood to have made new PCBs and not modified the 
old ones with bits stuck on the rear.


Dave