How to remove reversible doors on Vodder sideboard ?  

I recently picked up a Vodder OS29 sideboard with the sliding front doors that reverse to black
but am having difficulty removing the doors to reverse them .
I've had numerous Danish pieces over the years with the same type of sliding doors & tried the
usual " lift & swing out " technique but didn't work . I've also tried positioning them at center
when trying to remove them & can't see any type of screws inside top of the doors .
I know there are small white plastic spring loaded pins at the top of the doors as one the doors
is damaged on the inside & one of the pins has come out .
Does any other DA member have the same sideboard model & experience on how to remove
the sliding doors ?
Any help would be greatly appreciated,
M-C