Jack for headphones

Whether your unit has a jack for headphone or not I don't know. But if it has sockets for line out it can be of some help. Line out sockets provide the output from preamplifier section and in many conventional audio systems the same is the substitute for driving headphones. So you can try connecting your headphones to the line out sockets using an adaptor pin.
NB-The preamplifier of all audio systems are not able to drive headphones. Only some can. But if you introduce a headphone amplifier between the line out sockets and your headphone it will SURELY work.