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Here is the schematic for the 1998 build, which most likely is the revision you are working on. Sorry for the bad information.
https://www.cbtricks.com/radios/cobra/29ltd_29ltd_st_29wx_st/graphics/cobra_29ltd-st_29ltd_sch.pdf
My guess is that it was a mistake in manufacturing. It's kinda like ordering a QP W/cheese and Mcdonald's, no cheese, they get the paper stating that and attach it to the box, but still put cheese on it because they go through the motions so often that muscle memory takes over and they screw it up.
My 667V is probably 35 years old and I've owned it since 1996. It has TWO THIRDS KILOWATT on the front. No issues with the original variable, but I never run the variable anywhere but wide open.
The schematic shows D24 going from the clarifier to X1. I would check that to see if it has failed.
https://www.cbtricks.com/radios/realistic/trc_453/graphics/realistic_trc_453_sm_pg44_45_sch.pdf
The block diagram shows it listed a D23 sooo...
This is the info for the DX11B, but it uses the same board and is MOSTLY in the same configuration as your radio. There are some slight control differences, but the schematic should be close enough for you to get through the radio.
https://www.cbtricks.com/radios/galaxy/dx11b/index.htm
It looks like its most likely the same board as the original 5 band Saturn base, but without a few options. It has 2 antenna outputs where the Saturn only has one in place of a variable power, H/L power switch in place of +10kc, CB/PA where the echo on/off would be, and no roger beep or...
That is what this forum is good for... advice from those with more experience and knowledge than you (or I) have. Some of the guys here a much smarter with radios them I could ever hope to be, and I can't thank them enough for sharing what they have learned with the community.
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