If the fingerboard was glued to the neck it can be removed. The only variable is the amount of time and material that will go into the touch-up after gluing the fretboard back on. The price of the job is directly related.
The cart might be in front of the horse. Where is the truss rod broken? Most often the damage is at or near the threads. If that is true, it may be possible to repair the rod.
......where it threads in to an anchor at the "head" of the neck, and with this in effect being a "headless" set up with tuners at heel of the body, there does not seem to be any way to get the truss rod or what is left if it that might be left in the anchor out of the tip of the neck.....
The neck/through body material almost looks like some type of one piece plastic fabrication!
PS: there is one of these on E-bay with the bidding at $500 and still days left to go, so it might be worth fixing! I would love to have it back into playing condition.......even has the original case!
That said, you first need to ascertain just how that truss rod is installed. If it will slide out do whatever you can to do it that way first, before getting into the finish. If there are any threads visible there might be a way to thread something on there and use a slide hammer to coax it out. If that's out of the question then things will get tricky if you have to try to preserve the finish where the fretboard and neck meet Perhaps some VERY careful scoring... But, heat will pretty easily soften the glue and allow teh fretboard to work it's way off. Google fretboard removal and see what ideas and methods you find.
If I had to do things over I would try to save as much finish as possible and properly remove the fretboard. I wasn't so smart or patient. Good luck. Some good pics might help too.
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Lakland Owners Group #412
Modulus Mob #56
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For your location, I would recommend calling up the Bass Doctor. Carl. I believe that he is now technically an employee of Lakland, but he is by no means limited to their products. He does very excellent work. And he his prices are pretty decent.
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In God's love
Fretless Club #376; Christian Praise & Worship #502; Short Scale #331
I have one of these with a broken truss rod as well, except mine snapped off at the adjuster end. So this post is relevant to my interests. I believe the truss rods in these basses are not double expanding due to their vintage/age. I do know that the composite fingerboard is glued on and the neck/body wings are made of wood. I have had several Washburn basses from the 80's and 90's and several of them had truss rod problems. Like four out of the ten or so I have owned. The problem with this bass is my fault, got overzealous on the adjuster trying to get the action to playable level. After the rod broke I removed the hardware and found two 1/8" shim strips installed under the bridge saddle unit. Needless to say I was pretty torqued when I discovered this fact. I will give the Google search a try as posted previously.
Cheers,
Mike
Big time screw-up! Broken truss rod on my Washburn Status 1000! 
