Well, boys and girls, they're juggling those schedules out there in television land again.

The big juggler this time around is ABC, which is making some adjustments to both Tuesday and Friday nights.On Tuesdays, "Coach" is headed for hiatus-land to make way for a new sitcom. "STAT," an ensemble comedy about a New York trauma center, debuts April 16. It's from Danny Arnold, the creator/producer of "Barney Miller."

(But, never fear, "Coach" fans. That series has already been renewed and will be back for another season.)

The most familiar face among the "STAT" cast is Allison LaPlace, who starred as Linda on Fox's "Duet" and "Open House."

"Baby Talk," the absolutely terrible but fairly high-rated sitcom, moves from Friday nights to Tuesdays at 7:30 p.m. as of April 16. It's replacing "Davis Rules" - and don't be surprised if that series never returns.

The big change on Friday nights is the debut of "Dinosaurs," a new sitcom "which takes a live-action look at dinosaur domesticity in the prehistoric suburbs."

Based on an idea by the late Jim Henson and co-produced by the Muppet master's company and Disney, "Dinosaurs" takes place in the year 60,000,003 B.C. It's the story of the reptilian Sinclair family, which includes:

- Cigar-smoking Earl Sinclair, a blustery megalosaurus, the head of the household.

- Earl's wife, Fran, a tall allosaurus, who splits her time between running the household and preparing for the hatching of the newest family member.

- Robbie, a rebellious 14-year-old.

- Charlene, the 12-year-old daughter and "two-ton material girl."

- Earl's best friend, Roy Hess, an "old-style tyrannosaurus."

- And Earl's boss, B.P. Richfield, a "fear-inspiring triceratops."

The lizards will be created by the same people who've brought us the Muppets and the theatrical Teenage Mutant Ninja Turtles.

The debut of "Dinosaurs" will push "Family Matters" back to 8 p.m. on the Friday night schedule. And that, in turn, will push "Perfect Strangers" back to 8:30 p.m.

Have you got all that straight?YUPPIES WILL RETURN: ABC has also announced that "thirtysomething" will return from hiatus on April 9 - two weeks earlier than originally scheduled.

And the big reason for this is that the show's replacement in the Tuesday 9 p.m. time slot - "Eddie Dodd" - has been an absolute bomb in the ratings. Originally scheduled for a six-week run, "Eddie" has been cut back to just four episodes.

There's still no word on whether "thirtysomething" will be back next season - the co-creators and executive producers have announced they won't return - but the disastrous run of "Eddie" may have shown ABC it can't afford to cut "thirtysomething" loose.

There are six new installments of "thirtysomething" remaining for this season - and the first will feature the wedding of Ellyn and Billy.FLYING HIGH: The NBC sitcom "Wings" disappears from the schedule this week, but be assured it's only temporary. The show has been renewed for the 1991-92 season.

That's good news - particularly since Thursday's season-ending episode was also a cliffhanger. (Helen had to choose between her cello career and her boyfriend, Joe.)

The series will return with reruns sometime in June.