Cambridge Audio CXC Repair

Recently obtained one of these CD Players and it blows the power supply fuse on start up.
After some experimenting it seems to be problem with either the servo board or the CD mechanism as if the CD draw is out nothing happens. As soon as draw closes and the display indicates "READING" the fuse blows. Disconnecting servo board also stops this happening.
I have requested service manual from Cambridge Audio but at present they are saying pay Richer Sounds for diagnosis and repair.

Anybody out there had a similar problem ?