These are tough for even a well practiced shop tech to take apart and
access the heads and furthermore if you are not well skilled in
cleaning delicate VCR heads you would be best to let a shop do this
work for you. Improper disassembly and improper cleaning even if you
think you are being careful can do much damage.
If you still want to do this, study the case and make careful
observations so you can proceed with careful disassembly and accessing
the heads... and maybe go to the website for this newsgroup at
http://www.repairfaq.org/
there, with some searching, you will find proper and safe head cleaning
proceedures.
electricitym
..