http://vinci.inesc.pt/~pjjr/JVC/
http://www.coastweb.de/dv/dvboard2002/1184.html
http://www.coastweb.de/dv/dvboard2002/1268.html

Itt írnak arról, hogy lehet engedélyezni a DV-in bemenetet.

"How to use DV-in
In order to use DV-in you must connect the DV cable BEFORE powering on the camera. Otherwise the camera wouldn't accept any signal from the DV port. For some camera models you have to press the REC button twice, one to show DV-in on the LCD and other to start recording.
You have to put the camera in PLAY mode and press the REC to start recording from the DV-in port.
It is also NOT possible to see what you are recording on the TV through the AV cable but only on the camera's LCD screen."

"Compatibility list (for DV-in enabling with JVCEM)
The JVC miniDV models that are confirmed to be supported are:
- GR-DVL20E, GR-DVL30E, GR-DVL40E, GR-DVL100E, GR-DVL108E, GR-DVL150E, GR-DVL200E, GR-DVL300E, GR-DVL308E, GR-DVL450E, GR-DVL9200E, GR-DVL9500E, GR-DVL9700E, GR-DVX4E, GR-DVX7E, GR-DVX8E, GR-DVX9E, GR-DVx44E.
The confirmed Thomson miniDV models are:
- VMD2, VMD3, VMD8, VMD10."

Ennek alapján nekem úgy tűnik, hogy lehet.

Viszont, van ilyen is:

"Known Issues [of DVL150]: Camcorders purchased after 31st September 2001 CANNOT be DV-IN enabled "

http://www.coastweb.de/dv/dvboard2002/649.html

Sajnos alig van infó a weben erről a cuccról. Lehet, hogy túlságosan új.