hifi engine

Tascam CD-201 user manual

Hi guys.
I recently bought a Tascam CD-201. It sounds really great but owner's manual wasn´t included and there are some features I dont understand (e.g AUTO CUE which has three switcheable positions, Off, -56db & -65db and others). Has anybody got a manual to upload to hifiengine's library or can tell me what does that feature stand for?
Thank you so much