cindy, really not much of a tape, since it is a DVD. Anyhow, according to the service manual you can:
3. TO TAKE OUT A DISC WHEN DISC COVER DOES NOT OPEN (FORCE OPEN)
1 Remove the cabinet (upper) assembly (E).
2 Remove the cabinet (R) assembly.
3 Remove the VC heat sink, VC radiation sheet.
4 Remove the lens section, F panel section.
5 Push the portion A in the direction of the arrow and open the disc cover.
you can utilize these guides http://www.ifixit.com/Device/Sony_Handycam_DCR-DVD103#deviceGuides