Two neon lamps in series?

[frenchy]

My CTC-10w has these two NE2 lamps in series under the chassis, grounded on one end and other end seems to connect to bunch of different places in the schematics - brightness control, blanking, focus. What are they for? When the set is in operation, they are NOT lighting. Should they be or not, or only under certain conditions?
Everything seems to be working on the set ok except having color problems (tuner will lock in color but it's just one color (purple) that can be changed in intensity, tint control has no effect. Someone said maybe my 3.58 oscillator is not running. But I can't tell from the schematics what if anything the neon lamps could have to do with that, or if they should actually be glowing, and when. Would like to clear that up before poking around elsewhere. thanks!
Frenchy