Thanks to Steve, KD1JV, who drew this schematic based on a radio I sent to him. A companion to the -9200 repair manual.
I have his permission to freely share the work.
Given the media intensity given to the Corona or Wuhan virus, there seems no reason to have posts on that very specific subject in several forums Accordingly, all of those posts will be moved to "Headlines". All new items on that subject should be posted there as well. This notice will expire on 1 April, or be extended if needed. Thanks, folks.
Schematic for MFJ-9200 2017-09-04