Technics sl- mc6 110 disc changer just keeps saying checking disc dosnt respond to of the buttons

SOURCE: technic sl-mc7 110-disc cd changer

The problem is likely the carriage drive belt. The player is well over 10 years old so the belt gets stretched with use. Then it is unable to transfer power for moving mechanisms.
If you feel comfortable about opening the cover using proper electrical safety procedures then you can observe what the carriage is doing upon turn on. Unplug the player, remove the cover by unscrewing four fasteners (I think, but you can easily figure it out), plug in and power up. The carriage should go through a positioning calibration and disk checking sequence (simply, it moves out of the home position, travels across the player and repositions itself to await front panel input).
Yours probably doesn't so look at the belt on the top of the carriage. If it is off the drive wheels, remove electrical power, then simply put it back on, power up, and recheck.
If the belt is spinning on the wheels and seems loose then it needs replaced. Fortunately, here is an inexpensive and attainable replacement courtesy of another FixYa poster
http://www.fixya.com/support/t1616894-looking_drive_belt
Also, a clean up and lube of the mechanisms would be a good thing to do. That takes some technical know how to clean without damaging and applying the correct lube in the right amounts to the appropriate mechanism components. Some general references are available in electronic service books or online. I should probably launch a site!
Otherwise, without knowing the conditon of other components in the drive assemply, a service manual is required to proceed with further troubleshooting specifically for the player.
Hope that the K.I.S.S. approach helps you enjoy your player again.

SOURCE: Looking for a drive belt

A rubber "O" Ring as a belt solved the problem.  At our local hardware store:  1 1/16 OD x 15/16 ID - 1/16" wall  $0.39!

SOURCE: Disc gets jammed mid-way between CD magazine slot and inside player

Thats alot of disc this ubit holds. 110+1!! The CD changer arm mechanism sounds like is out of timming or the gears have slipped there teeth, and or the cam is broken, or theres a couple of small microswitches that can get broken as well.. The only way to work on this unit and see what the problem is, is to get a service manual and go through the mechanical alighnment and see where the problem is. Unless you can do a physical examination and know where every lob and gear is suppose to be, I do not see any other ways.

SOURCE: Technics 5 cd changer Model sl-pc11 will pick up

System will not play Mp3 or data format cds.
Audio cds only . Also Clean lenses with a cd lenses cleaner .
clean cd also straight away from center ,soft cloth
Check for scratches .

SOURCE: i have a technics sl-pd887 5disk changer that

I contacted a friend who operates a sterio shop and was convinced that fifteen years of bouncing up and down has made the laser unable to focus and read the info on the disks and the solution is to buy another one . Thanks for you're interest.