Download it he
http://www.eserviceinfo.com/equipment_mfg/Sony_3.html
May or may not be complete, but is free.
You may also need to download some other software to decompress and
view it.

www.repairfaq.org has quite a bit of information on safety.

With a good flashlight, you might be able to visually see some
electrolytic capacitors starting to bulge out ever so slightly out the
top. That might be a place to start with the freeze spray.