[Kenwood] TS-830 IF Filters

[Dick, W3OA]

I have as TS-830 with the YG-455C and YK-88C filters installed.  It has 
worked well until now when switching to the CW-N position seems to cut 
off all signals.

I've done some trouble shooting using the filter selection jumper on the 
IF board.  I've found that signals are passed in the CW1 and CW3 
positions but are not passed in the CW2 and CW4 positions. This makes me 
believe that the problem is in the YK-88C filter and/or it's associated 
circuitry.

Has anyone seen this problem or have some suggestions on how I should 
proceed?

73 - Dick, W3OA